diff --git a/README.md b/README.md index 110697ce..c90660a2 100644 --- a/README.md +++ b/README.md @@ -3,11 +3,55 @@ CUDA Path Tracer **University of Pennsylvania, CIS 565: GPU Programming and Architecture, Project 3** -* (TODO) YOUR NAME HERE -* Tested on: (TODO) Windows 22, i7-2222 @ 2.22GHz 22GB, GTX 222 222MB (Moore 2222 Lab) +* Zirui Zang + * [LinkedIn](https://www.linkedin.com/in/zirui-zang/) +* Tested on: Windows 10, AMD Ryzen 7 3700X @ 3.60GHz 32GB, RTX2070 SUPER 8GB (Personal) -### (TODO: Your README) +## Photorealistic Rendering by Tracing Rays -*DO NOT* leave the README to the last minute! It is a crucial part of the -project, and we will not be able to grade you without a good README. +In real life, rays come from light source, bounce between object surfaces before entering our eyes. Each bounce off an object surface carries information of that surface. In ray-tracing rendering, we can start from the eye (image plane), trace backwards through each pixel to the world and eventually to the light source. Such ray-tracing is repeated thousands of times and color information is averaged to give photorealistic effects. +

+deer +

+ +

+wolf +

+ + + +### Surface Scattering + +Below list the 3 separate scattering surfaces implemented in this renderer. To make refracgive surface seen more realistic, schlicks approximation is used to make the surface the effect of Frenel reflections. Objects in the seen can use a combination of these 3 properties based on the bidirectional scattering distribution function (BSDF) of the surface. + +| Lambertian | Reflective | Refractive | with Color | +| ------------ | ----------- | ----------- | ----------- | +| ![](scenes/cornell.2021-10-03_23-27-37z.3488samp.png) | ![](scenes/cornell.2021-10-03_23-34-37z.4309samp.png) | ![](scenes/cornell.2021-10-03_23-43-33z.1964samp.png) | ![](scenes/cornell.2021-10-04_00-14-05z.1925samp.png) | + +## Features + +### Depth of Field +Depth of Field is created by sampling with a non-zero aperture size. + +| Close Focus | Far Focus | +| ------------- | ----------- | +| ![](img/cornell.2021-10-05_19-34-14z.1858samp.png) | ![](img/cornell.2021-10-05_21-11-55z.5000samp.png) | + + +### Anti-Aliasing +Anti-Aliasing is implemented by sub-pixel sampling. + +| with Anti-Aliasing | without Anti-Aliasing | +| ------------- | ----------- | +| ![](img/aa1.png) | ![](img/aa0.png) | + +### Other Features +1. .obj Mesh Import +2. Toggleable option to cache the first bounce intersections for re-use across all subsequent iterations, when not using anti-aliasing. Is is not used because AA is a must. +3. Elimiating terminated rays with Stream Compaction. This method definitely reduces empty thread launches and improves performance. +4. Efficient attempt to sort the ray by the material type before shading. No efficient improvement is seen with this method. diff --git a/img/aa0.png b/img/aa0.png new file mode 100644 index 00000000..d1fa54d6 Binary files /dev/null and b/img/aa0.png differ diff --git a/img/aa1.png b/img/aa1.png new file mode 100644 index 00000000..04ca62b2 Binary files /dev/null and b/img/aa1.png differ diff --git a/img/cornell.2021-10-05_17-10-50z.5000samp.png b/img/cornell.2021-10-05_17-10-50z.5000samp.png new file mode 100644 index 00000000..bc89e089 Binary files /dev/null and b/img/cornell.2021-10-05_17-10-50z.5000samp.png differ diff --git a/img/cornell.2021-10-05_19-34-14z.1858samp.png b/img/cornell.2021-10-05_19-34-14z.1858samp.png new file mode 100644 index 00000000..c821e726 Binary files /dev/null and b/img/cornell.2021-10-05_19-34-14z.1858samp.png differ diff --git a/img/cornell.2021-10-05_21-11-55z.5000samp.png b/img/cornell.2021-10-05_21-11-55z.5000samp.png new file mode 100644 index 00000000..2f5985dc Binary files /dev/null and b/img/cornell.2021-10-05_21-11-55z.5000samp.png differ diff --git a/img/cornell.2021-10-05_21-17-44z.5000samp.png b/img/cornell.2021-10-05_21-17-44z.5000samp.png new file mode 100644 index 00000000..07915c5c Binary files /dev/null and b/img/cornell.2021-10-05_21-17-44z.5000samp.png differ diff --git a/scenes/cornell.2021-10-03_23-27-37z.3488samp.png b/scenes/cornell.2021-10-03_23-27-37z.3488samp.png new file mode 100644 index 00000000..d9102a57 Binary files /dev/null and b/scenes/cornell.2021-10-03_23-27-37z.3488samp.png differ diff --git a/scenes/cornell.2021-10-03_23-34-37z.4309samp.png b/scenes/cornell.2021-10-03_23-34-37z.4309samp.png new file mode 100644 index 00000000..4f0272f3 Binary files /dev/null and b/scenes/cornell.2021-10-03_23-34-37z.4309samp.png differ diff --git a/scenes/cornell.2021-10-03_23-43-33z.1964samp.png b/scenes/cornell.2021-10-03_23-43-33z.1964samp.png new file mode 100644 index 00000000..87ed08f8 Binary files /dev/null and b/scenes/cornell.2021-10-03_23-43-33z.1964samp.png differ diff --git a/scenes/cornell.2021-10-04_00-14-05z.1925samp.png b/scenes/cornell.2021-10-04_00-14-05z.1925samp.png new file mode 100644 index 00000000..6687c68e Binary files /dev/null and b/scenes/cornell.2021-10-04_00-14-05z.1925samp.png differ diff --git a/scenes/cornell.2021-10-04_19-03-52z.2097samp.png b/scenes/cornell.2021-10-04_19-03-52z.2097samp.png new file mode 100644 index 00000000..4abd6a66 Binary files /dev/null and b/scenes/cornell.2021-10-04_19-03-52z.2097samp.png differ diff --git a/scenes/cornell.2021-10-04_23-22-45z.3294samp.png b/scenes/cornell.2021-10-04_23-22-45z.3294samp.png new file mode 100644 index 00000000..ee42cab4 Binary files /dev/null and b/scenes/cornell.2021-10-04_23-22-45z.3294samp.png differ diff --git a/scenes/cornell.2021-10-05_01-11-01z.5000samp.png b/scenes/cornell.2021-10-05_01-11-01z.5000samp.png new file mode 100644 index 00000000..e5d03b70 Binary files /dev/null and b/scenes/cornell.2021-10-05_01-11-01z.5000samp.png differ diff --git a/scenes/deer.txt b/scenes/deer.txt new file mode 100644 index 00000000..9e7898b2 --- /dev/null +++ b/scenes/deer.txt @@ -0,0 +1,219 @@ +// Emissive material (light) +MATERIAL 0 +RGB 0.965, 0.933, 0.835 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 100 + +// Diffuse white +MATERIAL 1 +RGB 0.933, 0.788, 0.612 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// Diffuse navy blue +MATERIAL 2 +RGB 0.039, 0.255, 0.345 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// Diffuse green +MATERIAL 3 +RGB 0.004, 0.227, 0.125 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// Specular white +MATERIAL 4 +RGB .98 .98 .98 +SPECEX 0 +SPECRGB .98 .98 .98 +REFL 1 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// deer +MATERIAL 5 +RGB 0.98, 0.91, 0.878 +SPECEX 0 +SPECRGB 1, 0.761, 0.78 +REFL 0.1 +REFR 0.8 +REFRIOR 1.2 +EMITTANCE 0 + +// Diffuse orange +MATERIAL 6 +RGB 0.38, 0.239, 0.035 +SPECEX 0 +SPECRGB 0.788, 0.71, 0.565 +REFL 0.5 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// cloud +MATERIAL 7 +RGB 0.847, 0.949, 1 +SPECEX 0 +SPECRGB 0.847, 0.949, 1 +REFL 0 +REFR 0.2 +REFRIOR 1 +EMITTANCE 0 + +// rock +MATERIAL 8 +RGB 0.404, 0.404, 0.404 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// grass +MATERIAL 9 +RGB 0.004, 0.227, 0.125 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// Camera +CAMERA +RES 740 400 +FOVY 37 +ITERATIONS 5000 +DEPTH 10 +FILE cornell +EYE 2 5 11 +LOOKAT 0 5 0 +UP 0 1 0 + + +// moon +OBJECT 0 +sphere +material 0 +TRANS -5 10 9 +ROTAT 0 0 0 +SCALE 3 3 3 + +// Floor +OBJECT 1 +cube +material 1 +TRANS 0 0 0 +ROTAT 0 0 0 +SCALE 30 .01 30 + + +// wall 0 +OBJECT 2 +cube +material 3 +TRANS 10 10 0 +ROTAT 0 90 0 +SCALE 20 20 0.1 + +// wall 1 +OBJECT 3 +cube +material 3 +TRANS -10 10 0 +ROTAT 0 90 0 +SCALE 20 20 0.1 + +// wall 2 +OBJECT 4 +cube +material 2 +TRANS 0 10 -10 +ROTAT 0 0 0 +SCALE 20 20 0.1 + +// wall 3 +OBJECT 5 +cube +material 2 +TRANS 0 10 13 +ROTAT 0 0 0 +SCALE 20 20 0.1 + +// wall 4 +OBJECT 4 +cube +material 2 +TRANS 0 10 -10 +ROTAT 0 0 0 +SCALE 20 20 0.1 + +// wall 5 +OBJECT 4 +cube +material 6 +TRANS 10 5 -3 +ROTAT 0 -45 0 +SCALE 12 15 0.1 + +// wall 6 +OBJECT 4 +cube +material 6 +TRANS -10 5 -3 +ROTAT 0 45 0 +SCALE 12 15 0.1 + + + +OBJECT 5 +mesh ./cloud1.obj +material 7 +TRANS -5 8 0 +ROTAT 0 0 0 +SCALE 0.5 0.3 0.5 + + +OBJECT 5 +mesh ./rock.obj +material 8 +TRANS 10.5 -7 -7 +ROTAT 0 0 0 +SCALE 1 1 1 + +OBJECT 5 +mesh ./grass.obj +material 9 +TRANS 4 0 -2 +ROTAT 0 0 0 +SCALE 3 3 3 + + +OBJECT 5 +mesh ./deer.obj +material 5 +TRANS -1 0 2 +ROTAT 0 -30 0 +SCALE 1.2 1.2 1.2 + + + diff --git a/scenes/depth.txt b/scenes/depth.txt new file mode 100644 index 00000000..a8c61f4d --- /dev/null +++ b/scenes/depth.txt @@ -0,0 +1,226 @@ +// Emissive material (light) +MATERIAL 0 +RGB 0.965, 0.933, 0.835 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 70 + +// Diffuse white +MATERIAL 1 +RGB 0.933, 0.788, 0.612 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// Diffuse navy blue +MATERIAL 2 +RGB 0.039, 0.255, 0.345 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// Diffuse green +MATERIAL 3 +RGB 0.004, 0.227, 0.125 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// Specular white +MATERIAL 4 +RGB .98 .98 .98 +SPECEX 0 +SPECRGB .98 .98 .98 +REFL 1 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// Refractive white +MATERIAL 5 +RGB 0.9 0.9 0.9 +SPECEX 0 +SPECRGB 1 1 1 +REFL 0.2 +REFR 0.4 +REFRIOR 1.2 +EMITTANCE 0 + +// Diffuse orange +MATERIAL 6 +RGB 0.38, 0.239, 0.035 +SPECEX 0 +SPECRGB 0.788, 0.71, 0.565 +REFL 0.5 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// tree +MATERIAL 7 +RGB 0.004, 0.227, 0.125 +SPECEX 0 +SPECRGB 1, 1, 1 +REFL 0.1 +REFR 0.2 +REFRIOR 1 +EMITTANCE 0 + +// rock +MATERIAL 8 +RGB 0.404, 0.404, 0.404 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// grass +MATERIAL 9 +RGB 0.004, 0.227, 0.125 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + + +// 1850 1000 +// Camera +CAMERA +RES 740 400 +FOVY 40 +ITERATIONS 5000 +DEPTH 10 +FILE cornell +EYE 0 5 12 +LOOKAT 0 5 0 +UP 0 1 0 +APERTURE 0.15 +FOCUS_DIST 5.0 +// FOCUS_DIST 12.0 +// APERTURE 0.3 + + +// moon +OBJECT 0 +sphere +material 0 +TRANS -5 15 3 +ROTAT 0 0 0 +SCALE 3 3 3 + +// Floor +OBJECT 1 +cube +material 1 +TRANS 0 0 0 +ROTAT 0 0 0 +SCALE 30 .01 30 + + +// wall 0 +OBJECT 2 +cube +material 3 +TRANS 10 10 0 +ROTAT 0 90 0 +SCALE 20 20 0.1 + +// wall 1 +OBJECT 3 +cube +material 3 +TRANS -10 10 0 +ROTAT 0 90 0 +SCALE 20 20 0.1 + +// wall 2 +OBJECT 4 +cube +material 2 +TRANS 0 10 -10 +ROTAT 0 0 0 +SCALE 20 20 0.1 + +// wall 3 +OBJECT 5 +cube +material 1 +TRANS 0 10 13 +ROTAT 0 0 0 +SCALE 20 20 0.1 + +// wall 4 +OBJECT 4 +cube +material 2 +TRANS 0 10 -10 +ROTAT 0 0 0 +SCALE 20 20 0.1 + +// wall 5 +OBJECT 4 +cube +material 6 +TRANS 10 5 -3 +ROTAT 0 -45 0 +SCALE 12 15 0.1 + +// wall 6 +OBJECT 4 +cube +material 6 +TRANS -10 5 -3 +ROTAT 0 45 0 +SCALE 12 15 0.1 + + +OBJECT 5 +mesh ./rock.obj +material 8 +TRANS 11.5 -7 -9 +ROTAT 0 0 0 +SCALE 1 1 1 + +OBJECT 5 +mesh ./grass.obj +material 9 +TRANS 5 0 -4 +ROTAT 0 0 0 +SCALE 3 3 3 + +OBJECT 5 +mesh ./deer.obj +material 5 +TRANS 0 0 0 +ROTAT 0 -30 0 +SCALE 1.2 1.2 1.2 + + +OBJECT 5 +mesh ./wolf.obj +material 5 +TRANS -2.5 0 10 +ROTAT 0 155 0 +SCALE 1 1 1 + + + + + + diff --git a/scenes/mesh - Copy (2).txt b/scenes/mesh - Copy (2).txt new file mode 100644 index 00000000..815500a8 --- /dev/null +++ b/scenes/mesh - Copy (2).txt @@ -0,0 +1,170 @@ +// Emissive material (light) +MATERIAL 0 +RGB 1, 1, 1 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 100 + +// Diffuse white +MATERIAL 1 +RGB 0.933, 0.788, 0.612 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// Diffuse navy blue +MATERIAL 2 +RGB 0.039, 0.255, 0.345 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// Diffuse green +MATERIAL 3 +RGB 0.004, 0.227, 0.125 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// Specular white +MATERIAL 4 +RGB .98 .98 .98 +SPECEX 0 +SPECRGB .98 .98 .98 +REFL 1 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// Refractive white +MATERIAL 5 +RGB 1 1 1 +SPECEX 0 +SPECRGB 1 1 1 +REFL 0.1 +REFR 0.9 +REFRIOR 1.2 +EMITTANCE 0 + +// Diffuse orange +MATERIAL 6 +RGB 0.38, 0.239, 0.035 +SPECEX 0 +SPECRGB 0.788, 0.71, 0.565 +REFL 0.5 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// Camera +CAMERA +RES 800 800 +FOVY 45 +ITERATIONS 5000 +DEPTH 5 +FILE cornell +EYE 0.0 5 12.9 +LOOKAT 0 5 0 +UP 0 1 0 + + +// Ceiling light +OBJECT 0 +sphere +material 0 +TRANS -5 15 0 +ROTAT 0 0 0 +SCALE 2 2 2 + +// Floor +OBJECT 1 +cube +material 1 +TRANS 0 0 0 +ROTAT 0 0 0 +SCALE 30 .01 30 + + +// wall 0 +OBJECT 2 +cube +material 3 +TRANS 10 10 0 +ROTAT 0 90 0 +SCALE 20 20 0.1 + +// wall 1 +OBJECT 3 +cube +material 3 +TRANS -10 10 0 +ROTAT 0 90 0 +SCALE 20 20 0.1 + +// wall 2 +OBJECT 4 +cube +material 2 +TRANS 0 10 -10 +ROTAT 0 0 0 +SCALE 20 20 0.1 + +// wall 3 +OBJECT 5 +cube +material 2 +TRANS 0 10 13 +ROTAT 0 0 0 +SCALE 20 20 0.1 + +// wall 4 +OBJECT 4 +cube +material 2 +TRANS 0 10 -10 +ROTAT 0 0 0 +SCALE 20 20 0.1 + +// wall 5 +OBJECT 4 +cube +material 6 +TRANS 10 5 -3 +ROTAT 0 -45 0 +SCALE 12 15 0.1 + +// wall 6 +OBJECT 4 +cube +material 6 +TRANS -10 5 -3 +ROTAT 0 45 0 +SCALE 12 15 0.1 + + + +OBJECT 5 +mesh ./cloud1.obj +material 5 +TRANS -1 0 2 +ROTAT 0 45 0 +SCALE 1 1 1 + +OBJECT 6 +mesh ./tree.obj +material 5 +TRANS 2 0 -1 +ROTAT 0 0 0 +SCALE 1.8 1.8 1.8 diff --git a/scenes/mesh - Copy (3).txt b/scenes/mesh - Copy (3).txt new file mode 100644 index 00000000..c53a8df9 --- /dev/null +++ b/scenes/mesh - Copy (3).txt @@ -0,0 +1,199 @@ +// Emissive material (light) +MATERIAL 0 +RGB 0.965, 0.933, 0.835 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 100 + +// Diffuse white +MATERIAL 1 +RGB 0.933, 0.788, 0.612 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// Diffuse navy blue +MATERIAL 2 +RGB 0.039, 0.255, 0.345 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// Diffuse green +MATERIAL 3 +RGB 0.004, 0.227, 0.125 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// Specular white +MATERIAL 4 +RGB .98 .98 .98 +SPECEX 0 +SPECRGB .98 .98 .98 +REFL 1 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// Refractive white +MATERIAL 5 +RGB 1 1 1 +SPECEX 0 +SPECRGB 1 1 1 +REFL 0.1 +REFR 0.9 +REFRIOR 1.2 +EMITTANCE 0 + +// Diffuse orange +MATERIAL 6 +RGB 0.38, 0.239, 0.035 +SPECEX 0 +SPECRGB 0.788, 0.71, 0.565 +REFL 0.5 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// cloud +MATERIAL 7 +RGB 0.847, 0.949, 1 +SPECEX 0 +SPECRGB 0.847, 0.949, 1 +REFL 0 +REFR 0.2 +REFRIOR 1 +EMITTANCE 0 + +// rock +MATERIAL 8 +RGB 0.404, 0.404, 0.404 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// Camera +CAMERA +RES 800 800 +FOVY 45 +ITERATIONS 5000 +DEPTH 5 +FILE cornell +EYE 2 0 12.9 +LOOKAT 0 5 0 +UP 0 1 0 + + +// moon +OBJECT 0 +sphere +material 0 +TRANS -5 15 10 +ROTAT 0 0 0 +SCALE 2 2 2 + +// Floor +OBJECT 1 +cube +material 1 +TRANS 0 0 0 +ROTAT 0 0 0 +SCALE 30 .01 30 + + +// wall 0 +OBJECT 2 +cube +material 3 +TRANS 10 10 0 +ROTAT 0 90 0 +SCALE 20 20 0.1 + +// wall 1 +OBJECT 3 +cube +material 3 +TRANS -10 10 0 +ROTAT 0 90 0 +SCALE 20 20 0.1 + +// wall 2 +OBJECT 4 +cube +material 2 +TRANS 0 10 -10 +ROTAT 0 0 0 +SCALE 20 20 0.1 + +// wall 3 +OBJECT 5 +cube +material 2 +TRANS 0 10 13 +ROTAT 0 0 0 +SCALE 20 20 0.1 + +// wall 4 +OBJECT 4 +cube +material 2 +TRANS 0 10 -10 +ROTAT 0 0 0 +SCALE 20 20 0.1 + +// wall 5 +OBJECT 4 +cube +material 6 +TRANS 10 5 -3 +ROTAT 0 -45 0 +SCALE 12 15 0.1 + +// wall 6 +OBJECT 4 +cube +material 6 +TRANS -10 5 -3 +ROTAT 0 45 0 +SCALE 12 15 0.1 + + +OBJECT 5 +mesh ./cloud1.obj +material 7 +TRANS -5 8 0 +ROTAT 0 0 0 +SCALE 0.5 0.3 0.5 + +OBJECT 5 +mesh ./deer.obj +material 5 +TRANS -1 0 2 +ROTAT 0 -45 0 +SCALE 1.2 1.2 1.2 + + +OBJECT 5 +mesh ./rock.obj +material 8 +TRANS 10 -7 -8 +ROTAT 0 0 0 +SCALE 1 1 1 + + diff --git a/scenes/mesh - Copy.txt b/scenes/mesh - Copy.txt new file mode 100644 index 00000000..194500db --- /dev/null +++ b/scenes/mesh - Copy.txt @@ -0,0 +1,137 @@ +// Emissive material (light) +MATERIAL 0 +RGB 1 1 1 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 5 + +// Diffuse white +MATERIAL 1 +RGB 0.894, 0.843, 0.816 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// Diffuse blue +MATERIAL 2 +RGB 0.039, 0.255, 0.345 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// Diffuse orange +MATERIAL 3 +RGB 1, 0.588, 0.212 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// Specular white +MATERIAL 4 +RGB .98 .98 .98 +SPECEX 0 +SPECRGB .98 .98 .98 +REFL 1 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// Refractive white +MATERIAL 5 +RGB 1 1 1 +SPECEX 0 +SPECRGB 1 1 1 +REFL 0.1 +REFR 0.9 +REFRIOR 1.2 +EMITTANCE 0 + +// Diffuse orange +MATERIAL 6 +RGB .9 .9 .9 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// Camera +CAMERA +RES 800 800 +FOVY 45 +ITERATIONS 5000 +DEPTH 5 +FILE cornell +EYE 0.0 5 10.5 +LOOKAT 0 5 0 +UP 0 1 0 + + +// Ceiling light +OBJECT 0 +cube +material 0 +TRANS 0 10 0 +ROTAT 0 0 0 +SCALE 5 .3 5 + +// Floor +OBJECT 1 +cube +material 1 +TRANS 0 0 0 +ROTAT 0 0 0 +SCALE 20 .01 20 + +// Ceiling +OBJECT 2 +cube +material 1 +TRANS 0 10 0 +ROTAT 0 0 90 +SCALE .01 20 20 + +// wall 0 +OBJECT 3 +cube +material 3 +TRANS 5 0 0 +ROTAT 0 90 0 +SCALE 20 20 0.1 + +// wall 1 +OBJECT 4 +cube +material 3 +TRANS -5 0 0 +ROTAT 0 90 0 +SCALE 20 20 0.1 + +// wall 2 +OBJECT 5 +cube +material 2 +TRANS 0 0 -5 +ROTAT 0 0 0 +SCALE 20 20 0.1 + +OBJECT 6 +mesh ./wolf1.obj +material 5 +TRANS 0 0 0 +ROTAT 0 45 0 +SCALE 1 1 1 + diff --git a/scenes/mesh.txt b/scenes/mesh.txt new file mode 100644 index 00000000..9a458ab6 --- /dev/null +++ b/scenes/mesh.txt @@ -0,0 +1,217 @@ +// Emissive material (light) +MATERIAL 0 +RGB 0.965, 0.933, 0.835 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 80 + +// Diffuse white +MATERIAL 1 +RGB 0.933, 0.788, 0.612 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// Diffuse navy blue +MATERIAL 2 +RGB 0.039, 0.255, 0.345 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// Diffuse green +MATERIAL 3 +RGB 0.004, 0.227, 0.125 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// Specular white +MATERIAL 4 +RGB .98 .98 .98 +SPECEX 0 +SPECRGB .98 .98 .98 +REFL 1 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// Refractive white +MATERIAL 5 +RGB 1 1 1 +SPECEX 0 +SPECRGB 1 1 1 +REFL 0.1 +REFR 0.9 +REFRIOR 1.2 +EMITTANCE 0 + +// Diffuse orange +MATERIAL 6 +RGB 0.38, 0.239, 0.035 +SPECEX 0 +SPECRGB 0.788, 0.71, 0.565 +REFL 0.5 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// cloud +MATERIAL 7 +RGB 0.847, 0.949, 1 +SPECEX 0 +SPECRGB 0.847, 0.949, 1 +REFL 0 +REFR 0.2 +REFRIOR 1 +EMITTANCE 0 + +// rock +MATERIAL 8 +RGB 0.404, 0.404, 0.404 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// grass +MATERIAL 9 +RGB 0.004, 0.227, 0.125 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// Camera +CAMERA +RES 800 800 +FOVY 45 +ITERATIONS 5000 +DEPTH 5 +FILE cornell +EYE 2 6 12 +LOOKAT 0 5 0 +UP 0 1 0 + + +// moon +OBJECT 0 +sphere +material 0 +TRANS -5 12 9 +ROTAT 0 0 0 +SCALE 2 2 2 + +// Floor +OBJECT 1 +cube +material 1 +TRANS 0 0 0 +ROTAT 0 0 0 +SCALE 30 .01 30 + + +// wall 0 +OBJECT 2 +cube +material 3 +TRANS 10 10 0 +ROTAT 0 90 0 +SCALE 20 20 0.1 + +// wall 1 +OBJECT 3 +cube +material 3 +TRANS -10 10 0 +ROTAT 0 90 0 +SCALE 20 20 0.1 + +// wall 2 +OBJECT 4 +cube +material 2 +TRANS 0 10 -10 +ROTAT 0 0 0 +SCALE 20 20 0.1 + +// wall 3 +OBJECT 5 +cube +material 2 +TRANS 0 10 13 +ROTAT 0 0 0 +SCALE 20 20 0.1 + +// wall 4 +OBJECT 4 +cube +material 2 +TRANS 0 10 -10 +ROTAT 0 0 0 +SCALE 20 20 0.1 + +// wall 5 +OBJECT 4 +cube +material 6 +TRANS 10 5 -3 +ROTAT 0 -45 0 +SCALE 12 15 0.1 + +// wall 6 +OBJECT 4 +cube +material 6 +TRANS -10 5 -3 +ROTAT 0 45 0 +SCALE 12 15 0.1 + + + + +OBJECT 5 +mesh ./cloud1.obj +material 7 +TRANS -5 8 0 +ROTAT 0 0 0 +SCALE 0.5 0.3 0.5 + +OBJECT 5 +mesh ./deer.obj +material 5 +TRANS -1 0 2 +ROTAT 0 -45 0 +SCALE 1.2 1.2 1.2 + +OBJECT 5 +mesh ./rock.obj +material 8 +TRANS 10.5 -7 -7 +ROTAT 0 0 0 +SCALE 1 1 1 + +OBJECT 5 +mesh ./grass.obj +material 9 +TRANS 4 0 -2 +ROTAT 0 0 0 +SCALE 3 3 3 + + diff --git a/scenes/mesh2.txt b/scenes/mesh2.txt new file mode 100644 index 00000000..b3f73eb9 --- /dev/null +++ b/scenes/mesh2.txt @@ -0,0 +1,137 @@ +// Emissive material (light) +MATERIAL 0 +RGB 1, 1, 1 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 70 + +// Diffuse white +MATERIAL 1 +RGB 0.894, 0.843, 0.816 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// Diffuse blue +MATERIAL 2 +RGB 0.039, 0.255, 0.345 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// Diffuse orange +MATERIAL 3 +RGB 1, 0.588, 0.212 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// Specular white +MATERIAL 4 +RGB .98 .98 .98 +SPECEX 0 +SPECRGB .98 .98 .98 +REFL 1 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// Refractive white +MATERIAL 5 +RGB 1 1 1 +SPECEX 0 +SPECRGB 1 1 1 +REFL 0.1 +REFR 0.9 +REFRIOR 1.2 +EMITTANCE 0 + +// Diffuse orange +MATERIAL 6 +RGB .9 .9 .9 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// Camera +CAMERA +RES 800 800 +FOVY 45 +ITERATIONS 5000 +DEPTH 5 +FILE cornell +EYE 0.0 5 10.5 +LOOKAT 0 5 0 +UP 0 1 0 + + +// Ceiling light +OBJECT 0 +sphere +material 0 +TRANS 0 10 0 +ROTAT 0 0 0 +SCALE 1 1 1 + +// Floor +OBJECT 1 +cube +material 1 +TRANS 0 0 0 +ROTAT 0 0 0 +SCALE 20 .01 20 + + +// wall 0 +OBJECT 2 +cube +material 3 +TRANS 7 0 0 +ROTAT 0 90 0 +SCALE 20 20 0.1 + +// wall 1 +OBJECT 3 +cube +material 3 +TRANS -7 0 0 +ROTAT 0 90 0 +SCALE 20 20 0.1 + +// wall 2 +OBJECT 4 +cube +material 2 +TRANS 0 0 -7 +ROTAT 0 0 0 +SCALE 20 20 0.1 + + +OBJECT 5 +mesh ./wolf.obj +material 5 +TRANS -1 0 2 +ROTAT 0 45 0 +SCALE 1 1 1 + +OBJECT 6 +mesh ./tree.obj +material 5 +TRANS 2 0 -1 +ROTAT 0 0 0 +SCALE 1.8 1.8 1.8 diff --git a/scenes/refra.txt b/scenes/refra.txt new file mode 100644 index 00000000..fc840c72 --- /dev/null +++ b/scenes/refra.txt @@ -0,0 +1,145 @@ +// Emissive material (light) +MATERIAL 0 +RGB 1 1 1 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 3 + +// Diffuse white +MATERIAL 1 +RGB .98 .98 .98 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// Diffuse red +MATERIAL 2 +RGB .85 .35 .35 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// Diffuse green +MATERIAL 3 +RGB .35 .85 .35 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// Specular white +MATERIAL 4 +RGB .98 .98 .98 +SPECEX 0 +SPECRGB .98 .98 .98 +REFL 1 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// Refractive white +MATERIAL 5 +RGB .98 .98 .98 +SPECEX 0 +SPECRGB .98 .98 .98 +REFL 0 +REFR 1 +REFRIOR 1.5 +EMITTANCE 0 + + + + +// Camera +CAMERA +RES 800 800 +FOVY 45 +ITERATIONS 5000 +DEPTH 8 +FILE cornell +EYE 0.0 5 10.5 +LOOKAT 0 5 0 +UP 0 1 0 + + +// Ceiling light +OBJECT 0 +cube +material 0 +TRANS 0 10 0 +ROTAT 0 0 0 +SCALE 5 .3 5 + +// Floor +OBJECT 1 +cube +material 1 +TRANS 0 0 0 +ROTAT 0 0 0 +SCALE 10 .01 10 + +// Ceiling +OBJECT 2 +cube +material 1 +TRANS 0 10 0 +ROTAT 0 0 90 +SCALE .01 10 10 + +// Back wall +OBJECT 3 +cube +material 1 +TRANS 0 5 -5 +ROTAT 0 90 0 +SCALE .01 10 10 + +// Left wall +OBJECT 4 +cube +material 2 +TRANS -5 5 0 +ROTAT 0 0 0 +SCALE .01 10 10 + +// Right wall +OBJECT 5 +cube +material 3 +TRANS 5 5 0 +ROTAT 0 0 0 +SCALE .01 10 10 + +// Sphere +OBJECT 6 +sphere +material 4 +TRANS -1 2 -1 +ROTAT 0 0 0 +SCALE 3 3 3 + +OBJECT 7 +sphere +material 1 +TRANS -1 5 -1 +ROTAT 0 0 0 +SCALE 3 3 3 + +OBJECT 8 +sphere +material 5 +TRANS 2 5 -1 +ROTAT 0 0 0 +SCALE 3 3 3 + diff --git a/scenes/refra2.txt b/scenes/refra2.txt new file mode 100644 index 00000000..32a50fc2 --- /dev/null +++ b/scenes/refra2.txt @@ -0,0 +1,139 @@ +// Emissive material (light) +MATERIAL 0 +RGB 1 1 1 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 8 + +// Diffuse white +MATERIAL 1 +RGB .98 .98 .98 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// Diffuse red +MATERIAL 2 +RGB .85 .35 .35 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// Diffuse green +MATERIAL 3 +RGB .35 .85 .35 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// Specular white +MATERIAL 4 +RGB .98 .98 .98 +SPECEX 0 +SPECRGB .98 .98 .98 +REFL 1 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// Refractive white +MATERIAL 5 +RGB .98 .98 .98 +SPECEX 0 +SPECRGB .98 .98 .98 +REFL 0 +REFR 1 +REFRIOR 1.5 +EMITTANCE 0 + + + + +// Camera +CAMERA +RES 800 800 +FOVY 45 +ITERATIONS 5000 +DEPTH 8 +FILE cornell +EYE 0.0 5 8 +LOOKAT 0 5 0 +UP 0 1 0 +APERTURE 0.05 +FOCUS_DIST 5.0 + + +// Ceiling light +OBJECT 0 +cube +material 0 +TRANS 0 10 0 +ROTAT 0 0 0 +SCALE 5 .3 5 + +// Floor +OBJECT 1 +cube +material 1 +TRANS 0 0 0 +ROTAT 0 0 0 +SCALE 10 .01 10 + +// Ceiling +OBJECT 2 +cube +material 1 +TRANS 0 10 0 +ROTAT 0 0 90 +SCALE .01 10 10 + +// Left wall +OBJECT 4 +cube +material 2 +TRANS -5 5 0 +ROTAT 0 0 0 +SCALE .01 10 10 + +// Right wall +OBJECT 5 +cube +material 3 +TRANS 5 5 0 +ROTAT 0 0 0 +SCALE .01 10 10 + +// Sphere +OBJECT 6 +sphere +material 1 +TRANS 0 2 -3 +ROTAT 0 0 0 +SCALE 3 3 3 + +OBJECT 7 +sphere +material 1 +TRANS 0 2 0 +ROTAT 0 0 0 +SCALE 3 3 3 + +OBJECT 8 +sphere +material 1 +TRANS 0 2 3 +ROTAT 0 0 0 +SCALE 3 3 3 + diff --git a/scenes/wolf.txt b/scenes/wolf.txt new file mode 100644 index 00000000..7c5669d9 --- /dev/null +++ b/scenes/wolf.txt @@ -0,0 +1,202 @@ +// Emissive material (light) +MATERIAL 0 +RGB 0.965, 0.933, 0.835 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 150 + +// Diffuse white +MATERIAL 1 +RGB 0.933, 0.788, 0.612 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// Diffuse navy blue +MATERIAL 2 +RGB 0.039, 0.255, 0.345 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// Diffuse green +MATERIAL 3 +RGB 0.004, 0.227, 0.125 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// Specular white +MATERIAL 4 +RGB .98 .98 .98 +SPECEX 0 +SPECRGB .98 .98 .98 +REFL 1 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// Refractive white +MATERIAL 5 +RGB 0.9 0.9 0.9 +SPECEX 0 +SPECRGB 1 1 1 +REFL 0.1 +REFR 0.8 +REFRIOR 1.2 +EMITTANCE 0 + +// Diffuse orange +MATERIAL 6 +RGB 0.38, 0.239, 0.035 +SPECEX 0 +SPECRGB 0.788, 0.71, 0.565 +REFL 0.5 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// tree +MATERIAL 7 +RGB 0.004, 0.227, 0.125 +SPECEX 0 +SPECRGB 1, 1, 1 +REFL 0.1 +REFR 0.2 +REFRIOR 1 +EMITTANCE 0 + +// rock +MATERIAL 8 +RGB 0.404, 0.404, 0.404 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + +// grass +MATERIAL 9 +RGB 0.004, 0.227, 0.125 +SPECEX 0 +SPECRGB 0 0 0 +REFL 0 +REFR 0 +REFRIOR 0 +EMITTANCE 0 + + +// 1850 1000 +// Camera +CAMERA +RES 740 400 +FOVY 35 +ITERATIONS 5000 +DEPTH 10 +FILE cornell +EYE 2 5 12 +LOOKAT 0 5 0 +UP 0 1 0 + + +// moon +OBJECT 0 +sphere +material 0 +TRANS -5 15 5 +ROTAT 0 0 0 +SCALE 2 2 2 + +// Floor +OBJECT 1 +cube +material 1 +TRANS 0 0 0 +ROTAT 0 0 0 +SCALE 30 .01 30 + + +// wall 0 +OBJECT 2 +cube +material 3 +TRANS 10 10 0 +ROTAT 0 90 0 +SCALE 20 20 0.1 + +// wall 1 +OBJECT 3 +cube +material 3 +TRANS -10 10 0 +ROTAT 0 90 0 +SCALE 20 20 0.1 + +// wall 2 +OBJECT 4 +cube +material 2 +TRANS 0 10 -10 +ROTAT 0 0 0 +SCALE 20 20 0.1 + +// wall 3 +OBJECT 5 +cube +material 2 +TRANS 0 10 13 +ROTAT 0 0 0 +SCALE 20 20 0.1 + +// wall 4 +OBJECT 4 +cube +material 2 +TRANS 0 10 -10 +ROTAT 0 0 0 +SCALE 20 20 0.1 + +// wall 5 +OBJECT 4 +cube +material 6 +TRANS 10 5 -3 +ROTAT 0 -45 0 +SCALE 12 15 0.1 + +// wall 6 +OBJECT 4 +cube +material 6 +TRANS -10 5 -3 +ROTAT 0 45 0 +SCALE 12 15 0.1 + +OBJECT 5 +mesh ./wolf.obj +material 5 +TRANS -1.5 0 2 +ROTAT 0 45 0 +SCALE 1 1 1 + +OBJECT 6 +mesh ./lowpolytree.obj +material 7 +TRANS 3 5 -1 +ROTAT 0 0 0 +SCALE 2.2 2.5 2.2 + + diff --git a/src/interactions.h b/src/interactions.h index f969e458..309abaf8 100644 --- a/src/interactions.h +++ b/src/interactions.h @@ -1,6 +1,7 @@ #pragma once #include "intersections.h" +#include // CHECKITOUT /** @@ -9,7 +10,7 @@ */ __host__ __device__ glm::vec3 calculateRandomDirectionInHemisphere( - glm::vec3 normal, thrust::default_random_engine &rng) { + glm::vec3 normal, thrust::default_random_engine& rng) { thrust::uniform_real_distribution u01(0, 1); float up = sqrt(u01(rng)); // cos(theta) @@ -24,9 +25,11 @@ glm::vec3 calculateRandomDirectionInHemisphere( glm::vec3 directionNotNormal; if (abs(normal.x) < SQRT_OF_ONE_THIRD) { directionNotNormal = glm::vec3(1, 0, 0); - } else if (abs(normal.y) < SQRT_OF_ONE_THIRD) { + } + else if (abs(normal.y) < SQRT_OF_ONE_THIRD) { directionNotNormal = glm::vec3(0, 1, 0); - } else { + } + else { directionNotNormal = glm::vec3(0, 0, 1); } @@ -41,6 +44,14 @@ glm::vec3 calculateRandomDirectionInHemisphere( + sin(around) * over * perpendicularDirection2; } +__device__ glm::vec3 random_spherical(thrust::default_random_engine& rng) { + thrust::uniform_real_distribution u01(-1, 1); + thrust::uniform_real_distribution u03(-1, 1); + thrust::uniform_real_distribution u02(-1, 1); + glm::vec3 random_vec = glm::normalize(glm::vec3(u01(rng), u02(rng), u03(rng))); + return random_vec; +} + /** * Scatter a ray with some probabilities according to the material properties. * For example, a diffuse surface scatters in a cosine-weighted hemisphere. @@ -66,14 +77,69 @@ glm::vec3 calculateRandomDirectionInHemisphere( * * You may need to change the parameter list for your purposes! */ +__host__ __device__ float reflectance(float cosine, float ref_idx) { + // Use Schlick's approximation for reflectance. + float r0 = powf((1.f - ref_idx) / (1.0f + ref_idx), 2.0f); + return r0 + (1.f - r0) * powf((1.0f - cosine), 5.0f); +} + __host__ __device__ void scatterRay( - PathSegment & pathSegment, - glm::vec3 intersect, - glm::vec3 normal, - const Material &m, - thrust::default_random_engine &rng) { - // TODO: implement this. - // A basic implementation of pure-diffuse shading will just call the - // calculateRandomDirectionInHemisphere defined above. + PathSegment& pathSegment, + glm::vec3 intersect, + glm::vec3 normal, + const Material& m, + thrust::default_random_engine& rng) { + thrust::uniform_real_distribution u01(0, 1); + float random_num = u01(rng); + if (m.hasReflective > random_num){ + pathSegment.ray.direction = glm::reflect(pathSegment.ray.direction, normal); + pathSegment.ray.origin = intersect + EPSILON * normal; + pathSegment.color *= m.specular.color; + pathSegment.color = glm::clamp(pathSegment.color, glm::vec3(0.0f), glm::vec3(1.0f)); + } + else if (m.hasRefractive > random_num) { + glm::vec3 ray_direction = glm::normalize(pathSegment.ray.direction); + bool from_inside = glm::dot(ray_direction, normal) > 0.0f; + glm::vec3 refract_ray_direction; + float refraction_ratio = m.indexOfRefraction; + if (from_inside) { + normal = glm::normalize(-1.0f * normal); + refract_ray_direction = glm::normalize(glm::refract(pathSegment.ray.direction, normal, m.indexOfRefraction)); + } + else { + refraction_ratio = 1.0f / m.indexOfRefraction; + refract_ray_direction = glm::normalize(glm::refract(pathSegment.ray.direction, normal, 1.0f / m.indexOfRefraction)); + } + float cos_theta = fmin(glm::dot(-ray_direction, normal), 1.0f); + float sin_theta = sqrt(1.0f - cos_theta * cos_theta); + bool cannot_refract = (refraction_ratio * sin_theta) > 1.0; + + if (cannot_refract || reflectance(cos_theta, refraction_ratio) > random_num) { + pathSegment.ray.direction = glm::reflect(pathSegment.ray.direction, normal); + pathSegment.ray.origin = intersect + EPSILON * normal;; + pathSegment.color *= m.specular.color; + } + else { + pathSegment.ray.direction = refract_ray_direction; + pathSegment.ray.origin = intersect + 0.001f * refract_ray_direction; + pathSegment.color *= m.specular.color; + } + } + else { + // my implementation + //glm::vec3 random_vec = random_spherical(rng); + //pathSegments.ray.direction = glm::normalize(normal + random_vec); + pathSegment.ray.direction = glm::normalize(calculateRandomDirectionInHemisphere(normal, rng)); + pathSegment.ray.origin = intersect + EPSILON * normal; + pathSegment.color *= m.color; + pathSegment.color = glm::clamp(pathSegment.color, glm::vec3(0.0f), glm::vec3(1.0f)); + + } + pathSegment.remainingBounces--; + pathSegment.color = glm::clamp(pathSegment.color, glm::vec3(0.0f), glm::vec3(1.0f)); + + + + } diff --git a/src/intersections.h b/src/intersections.h index b1504071..7d8894a4 100644 --- a/src/intersections.h +++ b/src/intersections.h @@ -142,3 +142,37 @@ __host__ __device__ float sphereIntersectionTest(Geom sphere, Ray r, return glm::length(r.origin - intersectionPoint); } + +__host__ __device__ float triangleIntersectionTest(Geom geom, Ray r, + glm::vec3& intersectionPoint, glm::vec3& normal, bool& outside) { + glm::vec3 bary_position; + Triangle tri = geom.triangle; + bool hit = glm::intersectRayTriangle(r.origin, r.direction, + tri.vertex[0], + tri.vertex[1], + tri.vertex[2], bary_position); + //glm::vec3 bary_position_reverse; // glm intersectRayTriangle ignores back hitting. + //bool hit_reverse = glm::intersectRayTriangle(r.origin, r.direction, + // tri.vertex[0], + // tri.vertex[2], + // tri.vertex[1], bary_position_reverse); + + if (hit) { + normal = (tri.normals[0] * (1.0f - bary_position.x - bary_position.y)) + + (tri.normals[1] * bary_position.x) + (tri.normals[2] * bary_position.y); + outside = false; + } + //else if (hit_reverse) { + // normal = -1.0f * (tri.normals[0] * (1.0f - bary_position_reverse.x - bary_position_reverse.y)) + + // (tri.normals[1] * bary_position_reverse.x) + (tri.normals[2] * bary_position_reverse.y); + // outside = true; + //} + else { + return -1; + } + float t = bary_position.z; + intersectionPoint = getPointOnRay(r, t); + + return t; +} + diff --git a/src/loader_example.cc b/src/loader_example.cc new file mode 100644 index 00000000..8143bb79 --- /dev/null +++ b/src/loader_example.cc @@ -0,0 +1,437 @@ +// +// g++ loader_example.cc +// +#define TINYOBJLOADER_IMPLEMENTATION +#include "tiny_obj_loader.h" + +#include +#include +#include +#include +#include +#include + +#ifdef _WIN32 +#ifdef __cplusplus +extern "C" { +#endif +#include +#include +#ifdef __cplusplus +} +#endif +#pragma comment(lib, "winmm.lib") +#else +#if defined(__unix__) || defined(__APPLE__) +#include +#else +#include +#endif +#endif + +#ifdef __clang__ +#pragma clang diagnostic push +#if __has_warning("-Wzero-as-null-pointer-constant") +#pragma clang diagnostic ignored "-Wzero-as-null-pointer-constant" +#endif +#endif + +class timerutil { + public: +#ifdef _WIN32 + typedef DWORD time_t; + + timerutil() { ::timeBeginPeriod(1); } + ~timerutil() { ::timeEndPeriod(1); } + + void start() { t_[0] = ::timeGetTime(); } + void end() { t_[1] = ::timeGetTime(); } + + time_t sec() { return (time_t)((t_[1] - t_[0]) / 1000); } + time_t msec() { return (time_t)((t_[1] - t_[0])); } + time_t usec() { return (time_t)((t_[1] - t_[0]) * 1000); } + time_t current() { return ::timeGetTime(); } + +#else +#if defined(__unix__) || defined(__APPLE__) + typedef unsigned long int time_t; + + void start() { gettimeofday(tv + 0, &tz); } + void end() { gettimeofday(tv + 1, &tz); } + + time_t sec() { return static_cast(tv[1].tv_sec - tv[0].tv_sec); } + time_t msec() { + return this->sec() * 1000 + + static_cast((tv[1].tv_usec - tv[0].tv_usec) / 1000); + } + time_t usec() { + return this->sec() * 1000000 + + static_cast(tv[1].tv_usec - tv[0].tv_usec); + } + time_t current() { + struct timeval t; + gettimeofday(&t, NULL); + return static_cast(t.tv_sec * 1000 + t.tv_usec); + } + +#else // C timer + // using namespace std; + typedef clock_t time_t; + + void start() { t_[0] = clock(); } + void end() { t_[1] = clock(); } + + time_t sec() { return (time_t)((t_[1] - t_[0]) / CLOCKS_PER_SEC); } + time_t msec() { return (time_t)((t_[1] - t_[0]) * 1000 / CLOCKS_PER_SEC); } + time_t usec() { return (time_t)((t_[1] - t_[0]) * 1000000 / CLOCKS_PER_SEC); } + time_t current() { return (time_t)clock(); } + +#endif +#endif + + private: +#ifdef _WIN32 + DWORD t_[2]; +#else +#if defined(__unix__) || defined(__APPLE__) + struct timeval tv[2]; + struct timezone tz; +#else + time_t t_[2]; +#endif +#endif +}; + +static void PrintInfo(const tinyobj::attrib_t& attrib, + const std::vector& shapes, + const std::vector& materials) { + std::cout << "# of vertices : " << (attrib.vertices.size() / 3) << std::endl; + std::cout << "# of normals : " << (attrib.normals.size() / 3) << std::endl; + std::cout << "# of texcoords : " << (attrib.texcoords.size() / 2) + << std::endl; + + std::cout << "# of shapes : " << shapes.size() << std::endl; + std::cout << "# of materials : " << materials.size() << std::endl; + + for (size_t v = 0; v < attrib.vertices.size() / 3; v++) { + printf(" v[%ld] = (%f, %f, %f)\n", static_cast(v), + static_cast(attrib.vertices[3 * v + 0]), + static_cast(attrib.vertices[3 * v + 1]), + static_cast(attrib.vertices[3 * v + 2])); + } + + for (size_t v = 0; v < attrib.normals.size() / 3; v++) { + printf(" n[%ld] = (%f, %f, %f)\n", static_cast(v), + static_cast(attrib.normals[3 * v + 0]), + static_cast(attrib.normals[3 * v + 1]), + static_cast(attrib.normals[3 * v + 2])); + } + + for (size_t v = 0; v < attrib.texcoords.size() / 2; v++) { + printf(" uv[%ld] = (%f, %f)\n", static_cast(v), + static_cast(attrib.texcoords[2 * v + 0]), + static_cast(attrib.texcoords[2 * v + 1])); + } + + // For each shape + for (size_t i = 0; i < shapes.size(); i++) { + printf("shape[%ld].name = %s\n", static_cast(i), + shapes[i].name.c_str()); + printf("Size of shape[%ld].mesh.indices: %lu\n", static_cast(i), + static_cast(shapes[i].mesh.indices.size())); + printf("Size of shape[%ld].lines.indices: %lu\n", static_cast(i), + static_cast(shapes[i].lines.indices.size())); + printf("Size of shape[%ld].points.indices: %lu\n", static_cast(i), + static_cast(shapes[i].points.indices.size())); + + size_t index_offset = 0; + + assert(shapes[i].mesh.num_face_vertices.size() == + shapes[i].mesh.material_ids.size()); + + assert(shapes[i].mesh.num_face_vertices.size() == + shapes[i].mesh.smoothing_group_ids.size()); + + printf("shape[%ld].num_faces: %lu\n", static_cast(i), + static_cast(shapes[i].mesh.num_face_vertices.size())); + + // For each face + for (size_t f = 0; f < shapes[i].mesh.num_face_vertices.size(); f++) { + size_t fnum = shapes[i].mesh.num_face_vertices[f]; + + printf(" face[%ld].fnum = %ld\n", static_cast(f), + static_cast(fnum)); + + // For each vertex in the face + for (size_t v = 0; v < fnum; v++) { + tinyobj::index_t idx = shapes[i].mesh.indices[index_offset + v]; + printf(" face[%ld].v[%ld].idx = %d/%d/%d\n", static_cast(f), + static_cast(v), idx.vertex_index, idx.normal_index, + idx.texcoord_index); + } + + printf(" face[%ld].material_id = %d\n", static_cast(f), + shapes[i].mesh.material_ids[f]); + printf(" face[%ld].smoothing_group_id = %d\n", static_cast(f), + shapes[i].mesh.smoothing_group_ids[f]); + + index_offset += fnum; + } + + printf("shape[%ld].num_tags: %lu\n", static_cast(i), + static_cast(shapes[i].mesh.tags.size())); + for (size_t t = 0; t < shapes[i].mesh.tags.size(); t++) { + printf(" tag[%ld] = %s ", static_cast(t), + shapes[i].mesh.tags[t].name.c_str()); + printf(" ints: ["); + for (size_t j = 0; j < shapes[i].mesh.tags[t].intValues.size(); ++j) { + printf("%ld", static_cast(shapes[i].mesh.tags[t].intValues[j])); + if (j < (shapes[i].mesh.tags[t].intValues.size() - 1)) { + printf(", "); + } + } + printf("]"); + + printf(" floats: ["); + for (size_t j = 0; j < shapes[i].mesh.tags[t].floatValues.size(); ++j) { + printf("%f", static_cast( + shapes[i].mesh.tags[t].floatValues[j])); + if (j < (shapes[i].mesh.tags[t].floatValues.size() - 1)) { + printf(", "); + } + } + printf("]"); + + printf(" strings: ["); + for (size_t j = 0; j < shapes[i].mesh.tags[t].stringValues.size(); ++j) { + printf("%s", shapes[i].mesh.tags[t].stringValues[j].c_str()); + if (j < (shapes[i].mesh.tags[t].stringValues.size() - 1)) { + printf(", "); + } + } + printf("]"); + printf("\n"); + } + } + + for (size_t i = 0; i < materials.size(); i++) { + printf("material[%ld].name = %s\n", static_cast(i), + materials[i].name.c_str()); + printf(" material.Ka = (%f, %f ,%f)\n", + static_cast(materials[i].ambient[0]), + static_cast(materials[i].ambient[1]), + static_cast(materials[i].ambient[2])); + printf(" material.Kd = (%f, %f ,%f)\n", + static_cast(materials[i].diffuse[0]), + static_cast(materials[i].diffuse[1]), + static_cast(materials[i].diffuse[2])); + printf(" material.Ks = (%f, %f ,%f)\n", + static_cast(materials[i].specular[0]), + static_cast(materials[i].specular[1]), + static_cast(materials[i].specular[2])); + printf(" material.Tr = (%f, %f ,%f)\n", + static_cast(materials[i].transmittance[0]), + static_cast(materials[i].transmittance[1]), + static_cast(materials[i].transmittance[2])); + printf(" material.Ke = (%f, %f ,%f)\n", + static_cast(materials[i].emission[0]), + static_cast(materials[i].emission[1]), + static_cast(materials[i].emission[2])); + printf(" material.Ns = %f\n", + static_cast(materials[i].shininess)); + printf(" material.Ni = %f\n", static_cast(materials[i].ior)); + printf(" material.dissolve = %f\n", + static_cast(materials[i].dissolve)); + printf(" material.illum = %d\n", materials[i].illum); + printf(" material.map_Ka = %s\n", materials[i].ambient_texname.c_str()); + printf(" material.map_Kd = %s\n", materials[i].diffuse_texname.c_str()); + printf(" material.map_Ks = %s\n", materials[i].specular_texname.c_str()); + printf(" material.map_Ns = %s\n", + materials[i].specular_highlight_texname.c_str()); + printf(" material.map_bump = %s\n", materials[i].bump_texname.c_str()); + printf(" bump_multiplier = %f\n", static_cast(materials[i].bump_texopt.bump_multiplier)); + printf(" material.map_d = %s\n", materials[i].alpha_texname.c_str()); + printf(" material.disp = %s\n", materials[i].displacement_texname.c_str()); + printf(" <>\n"); + printf(" material.Pr = %f\n", static_cast(materials[i].roughness)); + printf(" material.Pm = %f\n", static_cast(materials[i].metallic)); + printf(" material.Ps = %f\n", static_cast(materials[i].sheen)); + printf(" material.Pc = %f\n", static_cast(materials[i].clearcoat_thickness)); + printf(" material.Pcr = %f\n", static_cast(materials[i].clearcoat_thickness)); + printf(" material.aniso = %f\n", static_cast(materials[i].anisotropy)); + printf(" material.anisor = %f\n", static_cast(materials[i].anisotropy_rotation)); + printf(" material.map_Ke = %s\n", materials[i].emissive_texname.c_str()); + printf(" material.map_Pr = %s\n", materials[i].roughness_texname.c_str()); + printf(" material.map_Pm = %s\n", materials[i].metallic_texname.c_str()); + printf(" material.map_Ps = %s\n", materials[i].sheen_texname.c_str()); + printf(" material.norm = %s\n", materials[i].normal_texname.c_str()); + std::map::const_iterator it( + materials[i].unknown_parameter.begin()); + std::map::const_iterator itEnd( + materials[i].unknown_parameter.end()); + + for (; it != itEnd; it++) { + printf(" material.%s = %s\n", it->first.c_str(), it->second.c_str()); + } + printf("\n"); + } +} + +static bool TestLoadObj(const char* filename, const char* basepath = NULL, + bool triangulate = true) { + std::cout << "Loading " << filename << std::endl; + + tinyobj::attrib_t attrib; + std::vector shapes; + std::vector materials; + + timerutil t; + t.start(); + std::string warn; + std::string err; + bool ret = tinyobj::LoadObj(&attrib, &shapes, &materials, &warn, &err, filename, + basepath, triangulate); + t.end(); + printf("Parsing time: %lu [msecs]\n", t.msec()); + + if (!warn.empty()) { + std::cout << "WARN: " << warn << std::endl; + } + + if (!err.empty()) { + std::cerr << "ERR: " << err << std::endl; + } + + if (!ret) { + printf("Failed to load/parse .obj.\n"); + return false; + } + + PrintInfo(attrib, shapes, materials); + + return true; +} + +static bool TestStreamLoadObj() { + std::cout << "Stream Loading " << std::endl; + + std::stringstream objStream; + objStream << "mtllib cube.mtl\n" + "\n" + "v 0.000000 2.000000 2.000000\n" + "v 0.000000 0.000000 2.000000\n" + "v 2.000000 0.000000 2.000000\n" + "v 2.000000 2.000000 2.000000\n" + "v 0.000000 2.000000 0.000000\n" + "v 0.000000 0.000000 0.000000\n" + "v 2.000000 0.000000 0.000000\n" + "v 2.000000 2.000000 0.000000\n" + "# 8 vertices\n" + "\n" + "g front cube\n" + "usemtl white\n" + "f 1 2 3 4\n" + "g back cube\n" + "# expects white material\n" + "f 8 7 6 5\n" + "g right cube\n" + "usemtl red\n" + "f 4 3 7 8\n" + "g top cube\n" + "usemtl white\n" + "f 5 1 4 8\n" + "g left cube\n" + "usemtl green\n" + "f 5 6 2 1\n" + "g bottom cube\n" + "usemtl white\n" + "f 2 6 7 3\n" + "# 6 elements"; + + std::string matStream( + "newmtl white\n" + "Ka 0 0 0\n" + "Kd 1 1 1\n" + "Ks 0 0 0\n" + "\n" + "newmtl red\n" + "Ka 0 0 0\n" + "Kd 1 0 0\n" + "Ks 0 0 0\n" + "\n" + "newmtl green\n" + "Ka 0 0 0\n" + "Kd 0 1 0\n" + "Ks 0 0 0\n" + "\n" + "newmtl blue\n" + "Ka 0 0 0\n" + "Kd 0 0 1\n" + "Ks 0 0 0\n" + "\n" + "newmtl light\n" + "Ka 20 20 20\n" + "Kd 1 1 1\n" + "Ks 0 0 0"); + + using namespace tinyobj; + class MaterialStringStreamReader : public MaterialReader { + public: + MaterialStringStreamReader(const std::string& matSStream) + : m_matSStream(matSStream) {} + virtual ~MaterialStringStreamReader() TINYOBJ_OVERRIDE {} + virtual bool operator()(const std::string& matId, + std::vector* materials, + std::map* matMap, + std::string* warn, + std::string* err) TINYOBJ_OVERRIDE { + (void)err; + (void)matId; + LoadMtl(matMap, materials, &m_matSStream, warn, err); + + return true; + } + + private: + std::stringstream m_matSStream; + }; + + MaterialStringStreamReader matSSReader(matStream); + tinyobj::attrib_t attrib; + std::vector shapes; + std::vector materials; + std::string warn; + std::string err; + bool ret = tinyobj::LoadObj(&attrib, &shapes, &materials, &warn, &err, &objStream, + &matSSReader); + + if (!err.empty()) { + std::cerr << err << std::endl; + } + + if (!ret) { + return false; + } + + PrintInfo(attrib, shapes, materials); + + return true; +} + +int main(int argc, char** argv) { + if (argc > 1) { + const char* basepath = "models/"; + if (argc > 2) { + basepath = argv[2]; + } + assert(true == TestLoadObj(argv[1], basepath)); + } else { + // assert(true == TestLoadObj("cornell_box.obj")); + // assert(true == TestLoadObj("cube.obj")); + assert(true == TestStreamLoadObj()); + assert(true == + TestLoadObj("models/catmark_torus_creases0.obj", "models/", false)); + } + + return 0; +} diff --git a/src/main.cpp b/src/main.cpp index fe8e85ec..45d873e4 100644 --- a/src/main.cpp +++ b/src/main.cpp @@ -38,7 +38,8 @@ int main(int argc, char** argv) { return 1; } - const char *sceneFile = argv[1]; + //const char* sceneFile = "mesh.txt"; + const char* sceneFile = argv[1]; // Load scene file scene = new Scene(sceneFile); diff --git a/src/pathtrace.cu b/src/pathtrace.cu index 056e1467..275e09b8 100644 --- a/src/pathtrace.cu +++ b/src/pathtrace.cu @@ -4,17 +4,25 @@ #include #include #include +#include +#include +#include #include "sceneStructs.h" #include "scene.h" #include "glm/glm.hpp" #include "glm/gtx/norm.hpp" +#include "glm/gtc/random.hpp" #include "utilities.h" #include "pathtrace.h" #include "intersections.h" #include "interactions.h" #define ERRORCHECK 1 +#define SUB_PIXEL_SAMPLE 10 +#define USE_ANTIALIASING 1 +#define USE_MATERIAL_SORT 0 +#define USE_DEPTH_OF_FIELD 1 #define FILENAME (strrchr(__FILE__, '/') ? strrchr(__FILE__, '/') + 1 : __FILE__) #define checkCUDAError(msg) checkCUDAErrorFn(msg, FILENAME, __LINE__) @@ -73,6 +81,7 @@ static Geom * dev_geoms = NULL; static Material * dev_materials = NULL; static PathSegment * dev_paths = NULL; static ShadeableIntersection * dev_intersections = NULL; +static ShadeableIntersection* dev_intersections_cache = NULL; // TODO: static variables for device memory, any extra info you need, etc // ... @@ -80,11 +89,12 @@ void pathtraceInit(Scene *scene) { hst_scene = scene; const Camera &cam = hst_scene->state.camera; const int pixelcount = cam.resolution.x * cam.resolution.y; + const int pixelcount_sub = cam.resolution.x * cam.resolution.y * SUB_PIXEL_SAMPLE; cudaMalloc(&dev_image, pixelcount * sizeof(glm::vec3)); cudaMemset(dev_image, 0, pixelcount * sizeof(glm::vec3)); - cudaMalloc(&dev_paths, pixelcount * sizeof(PathSegment)); + cudaMalloc(&dev_paths, pixelcount_sub * sizeof(PathSegment)); cudaMalloc(&dev_geoms, scene->geoms.size() * sizeof(Geom)); cudaMemcpy(dev_geoms, scene->geoms.data(), scene->geoms.size() * sizeof(Geom), cudaMemcpyHostToDevice); @@ -92,8 +102,11 @@ void pathtraceInit(Scene *scene) { cudaMalloc(&dev_materials, scene->materials.size() * sizeof(Material)); cudaMemcpy(dev_materials, scene->materials.data(), scene->materials.size() * sizeof(Material), cudaMemcpyHostToDevice); - cudaMalloc(&dev_intersections, pixelcount * sizeof(ShadeableIntersection)); - cudaMemset(dev_intersections, 0, pixelcount * sizeof(ShadeableIntersection)); + cudaMalloc(&dev_intersections, pixelcount_sub * sizeof(ShadeableIntersection)); + cudaMemset(dev_intersections, 0, pixelcount_sub * sizeof(ShadeableIntersection)); + + cudaMalloc(&dev_intersections_cache, pixelcount_sub * sizeof(ShadeableIntersection)); + cudaMemset(dev_intersections_cache, 0, pixelcount_sub * sizeof(ShadeableIntersection)); // TODO: initialize any extra device memeory you need @@ -106,6 +119,7 @@ void pathtraceFree() { cudaFree(dev_geoms); cudaFree(dev_materials); cudaFree(dev_intersections); + cudaFree(dev_intersections_cache); // TODO: clean up any extra device memory you created checkCUDAError("pathtraceFree"); @@ -121,22 +135,47 @@ void pathtraceFree() { */ __global__ void generateRayFromCamera(Camera cam, int iter, int traceDepth, PathSegment* pathSegments) { + int x = (blockIdx.x * blockDim.x) + threadIdx.x; int y = (blockIdx.y * blockDim.y) + threadIdx.y; + int z = threadIdx.z; if (x < cam.resolution.x && y < cam.resolution.y) { int index = x + (y * cam.resolution.x); - PathSegment & segment = pathSegments[index]; + int index_sub = x + (y * cam.resolution.x) + z * cam.resolution.x * cam.resolution.y; + PathSegment & segment = pathSegments[index_sub]; + thrust::default_random_engine rng = makeSeededRandomEngine(iter, index_sub, 0); + thrust::uniform_real_distribution u01(-1.0, 1.0); + + segment.ray.origin = cam.position; - segment.color = glm::vec3(1.0f, 1.0f, 1.0f); + segment.color = glm::vec3(1.0f, 1.0f, 1.0f); // TODO: implement antialiasing by jittering the ray - segment.ray.direction = glm::normalize(cam.view - - cam.right * cam.pixelLength.x * ((float)x - (float)cam.resolution.x * 0.5f) - - cam.up * cam.pixelLength.y * ((float)y - (float)cam.resolution.y * 0.5f) + #if USE_ANTIALIASING + segment.ray.direction = glm::normalize(cam.view + - cam.right * cam.pixelLength.x * ((float)x - (float)cam.resolution.x * 0.5f + u01(rng)) + - cam.up * cam.pixelLength.y * ((float)y - (float)cam.resolution.y * 0.5f + u01(rng)) + ); + #else + segment.ray.direction = glm::normalize(cam.view + - cam.right * cam.pixelLength.x * ((float)x - (float)cam.resolution.x * 0.5f) + - cam.up * cam.pixelLength.y * ((float)y - (float)cam.resolution.y * 0.5f) ); + #endif + + #if USE_DEPTH_OF_FIELD + // defouce blur + float focus_dist = cam.focus_dist; + float aperture_radius = cam.aperture; + glm::vec2 random_vec = glm::normalize(glm::vec2(u01(rng), u01(rng))); + glm::vec3 offset = cam.right * random_vec.x * aperture_radius + cam.up * random_vec.y * aperture_radius; + segment.ray.direction = glm::normalize(segment.ray.direction * focus_dist - offset); + segment.ray.origin += offset; + #endif + // TODO: implement antialiasing by jittering the ray segment.pixelIndex = index; segment.remainingBounces = traceDepth; } @@ -185,6 +224,10 @@ __global__ void computeIntersections( { t = sphereIntersectionTest(geom, pathSegment.ray, tmp_intersect, tmp_normal, outside); } + else if (geom.type == TRIANGLE) + { + t = triangleIntersectionTest(geom, pathSegment.ray, tmp_intersect, tmp_normal, outside); + } // TODO: add more intersection tests here... triangle? metaball? CSG? // Compute the minimum t from the intersection tests to determine what @@ -208,10 +251,13 @@ __global__ void computeIntersections( intersections[path_index].t = t_min; intersections[path_index].materialId = geoms[hit_geom_index].materialid; intersections[path_index].surfaceNormal = normal; + intersections[path_index].intersect_point = intersect_point; } } } + + // LOOK: "fake" shader demonstrating what you might do with the info in // a ShadeableIntersection, as well as how to use thrust's random number // generator. Observe that since the thrust random number generator basically @@ -221,7 +267,7 @@ __global__ void computeIntersections( // Note that this shader does NOT do a BSDF evaluation! // Your shaders should handle that - this can allow techniques such as // bump mapping. -__global__ void shadeFakeMaterial ( +__global__ void shadeMaterial ( int iter , int num_paths , ShadeableIntersection * shadeableIntersections @@ -246,14 +292,13 @@ __global__ void shadeFakeMaterial ( // If the material indicates that the object was a light, "light" the ray if (material.emittance > 0.0f) { pathSegments[idx].color *= (materialColor * material.emittance); + pathSegments[idx].remainingBounces = 0; } // Otherwise, do some pseudo-lighting computation. This is actually more // like what you would expect from shading in a rasterizer like OpenGL. // TODO: replace this! you should be able to start with basically a one-liner else { - float lightTerm = glm::dot(intersection.surfaceNormal, glm::vec3(0.0f, 1.0f, 0.0f)); - pathSegments[idx].color *= (materialColor * lightTerm) * 0.3f + ((1.0f - intersection.t * 0.02f) * materialColor) * 0.7f; - pathSegments[idx].color *= u01(rng); // apply some noise because why not + scatterRay(pathSegments[idx], intersection.intersect_point, intersection.surfaceNormal, material, rng); } // If there was no intersection, color the ray black. // Lots of renderers use 4 channel color, RGBA, where A = alpha, often @@ -261,6 +306,7 @@ __global__ void shadeFakeMaterial ( // This can be useful for post-processing and image compositing. } else { pathSegments[idx].color = glm::vec3(0.0f); + pathSegments[idx].remainingBounces = 0; } } } @@ -273,121 +319,169 @@ __global__ void finalGather(int nPaths, glm::vec3 * image, PathSegment * iterati if (index < nPaths) { PathSegment iterationPath = iterationPaths[index]; - image[iterationPath.pixelIndex] += iterationPath.color; + image[iterationPath.pixelIndex] += iterationPath.color / (float)SUB_PIXEL_SAMPLE; } } +struct sort_material_id{ + __host__ __device__ bool operator()(const ShadeableIntersection& m1, const ShadeableIntersection& m2) { + return m1.materialId < m2.materialId; + } +}; + +struct not_zero { + __host__ __device__ bool operator()(const PathSegment& p) { + return (p.remainingBounces > 0); + } +}; + /** * Wrapper for the __global__ call that sets up the kernel calls and does a ton * of memory management */ -void pathtrace(uchar4 *pbo, int frame, int iter) { - const int traceDepth = hst_scene->state.traceDepth; - const Camera &cam = hst_scene->state.camera; - const int pixelcount = cam.resolution.x * cam.resolution.y; - - // 2D block for generating ray from camera - const dim3 blockSize2d(8, 8); +void pathtrace(uchar4* pbo, int frame, int iter) { + auto start = std::chrono::high_resolution_clock::now(); + const int traceDepth = hst_scene->state.traceDepth; + const Camera& cam = hst_scene->state.camera; + const int pixelcount = cam.resolution.x * cam.resolution.y; + const int pixelcount_sub = pixelcount * SUB_PIXEL_SAMPLE; + + // 2D block for generating ray from camera + const dim3 blockSize2d(8, 8); + const dim3 blockSize3d(8, 8, SUB_PIXEL_SAMPLE); const dim3 blocksPerGrid2d( - (cam.resolution.x + blockSize2d.x - 1) / blockSize2d.x, - (cam.resolution.y + blockSize2d.y - 1) / blockSize2d.y); - - // 1D block for path tracing - const int blockSize1d = 128; - - /////////////////////////////////////////////////////////////////////////// - - // Recap: - // * Initialize array of path rays (using rays that come out of the camera) - // * You can pass the Camera object to that kernel. - // * Each path ray must carry at minimum a (ray, color) pair, - // * where color starts as the multiplicative identity, white = (1, 1, 1). - // * This has already been done for you. - // * For each depth: - // * Compute an intersection in the scene for each path ray. - // A very naive version of this has been implemented for you, but feel - // free to add more primitives and/or a better algorithm. - // Currently, intersection distance is recorded as a parametric distance, - // t, or a "distance along the ray." t = -1.0 indicates no intersection. - // * Color is attenuated (multiplied) by reflections off of any object - // * TODO: Stream compact away all of the terminated paths. - // You may use either your implementation or `thrust::remove_if` or its - // cousins. - // * Note that you can't really use a 2D kernel launch any more - switch - // to 1D. - // * TODO: Shade the rays that intersected something or didn't bottom out. - // That is, color the ray by performing a color computation according - // to the shader, then generate a new ray to continue the ray path. - // We recommend just updating the ray's PathSegment in place. - // Note that this step may come before or after stream compaction, - // since some shaders you write may also cause a path to terminate. - // * Finally, add this iteration's results to the image. This has been done - // for you. - - // TODO: perform one iteration of path tracing - - generateRayFromCamera <<>>(cam, iter, traceDepth, dev_paths); - checkCUDAError("generate camera ray"); - - int depth = 0; - PathSegment* dev_path_end = dev_paths + pixelcount; - int num_paths = dev_path_end - dev_paths; - - // --- PathSegment Tracing Stage --- - // Shoot ray into scene, bounce between objects, push shading chunks - - bool iterationComplete = false; - while (!iterationComplete) { - - // clean shading chunks - cudaMemset(dev_intersections, 0, pixelcount * sizeof(ShadeableIntersection)); - - // tracing - dim3 numblocksPathSegmentTracing = (num_paths + blockSize1d - 1) / blockSize1d; - computeIntersections <<>> ( - depth - , num_paths - , dev_paths - , dev_geoms - , hst_scene->geoms.size() - , dev_intersections - ); - checkCUDAError("trace one bounce"); - cudaDeviceSynchronize(); - depth++; - - - // TODO: - // --- Shading Stage --- - // Shade path segments based on intersections and generate new rays by - // evaluating the BSDF. - // Start off with just a big kernel that handles all the different - // materials you have in the scenefile. - // TODO: compare between directly shading the path segments and shading - // path segments that have been reshuffled to be contiguous in memory. - - shadeFakeMaterial<<>> ( - iter, - num_paths, - dev_intersections, - dev_paths, - dev_materials - ); - iterationComplete = true; // TODO: should be based off stream compaction results. - } + (cam.resolution.x + blockSize3d.x - 1) / blockSize3d.x, + (cam.resolution.y + blockSize3d.y - 1) / blockSize3d.y); + + // 1D block for path tracing + const int blockSize1d = 256; + + /////////////////////////////////////////////////////////////////////////// + + // Recap: + // * Initialize array of path rays (using rays that come out of the camera) + // * You can pass the Camera object to that kernel. + // * Each path ray must carry at minimum a (ray, color) pair, + // * where color starts as the multiplicative identity, white = (1, 1, 1). + // * This has already been done for you. + // * For each depth: + // * Compute an intersection in the scene for each path ray. + // A very naive version of this has been implemented for you, but feel + // free to add more primitives and/or a better algorithm. + // Currently, intersection distance is recorded as a parametric distance, + // t, or a "distance along the ray." t = -1.0 indicates no intersection. + // * Color is attenuated (multiplied) by reflections off of any object + // * TODO: Stream compact away all of the terminated paths. + // You may use either your implementation or `thrust::remove_if` or its + // cousins. + // * Note that you can't really use a 2D kernel launch any more - switch + // to 1D. + // * TODO: Shade the rays that intersected something or didn't bottom out. + // That is, color the ray by performing a color computation according + // to the shader, then generate a new ray to continue the ray path. + // We recommend just updating the ray's PathSegment in place. + // Note that this step may come before or after stream compaction, + // since some shaders you write may also cause a path to terminate. + // * Finally, add this iteration's results to the image. This has been done + // for you. + + // TODO: perform one iteration of path tracing + + generateRayFromCamera << > > (cam, iter, traceDepth, dev_paths); + checkCUDAError("generate camera ray"); + + int depth = 0; + PathSegment* dev_path_end = dev_paths + pixelcount_sub; + int num_paths = dev_path_end - dev_paths; + + // --- PathSegment Tracing Stage --- + // Shoot ray into scene, bounce between objects, push shading chunks + + bool iterationComplete = false; + while (!iterationComplete) { + + // clean shading chunks + cudaMemset(dev_intersections, 0, num_paths * sizeof(ShadeableIntersection)); + + // tracing + dim3 numblocksPathSegmentTracing = (num_paths + blockSize1d - 1) / blockSize1d; + bool use_cache = false; // because of anti-aliasing + if (depth == 0 && iter == 1 && use_cache) { + computeIntersections << > > ( + depth + , num_paths + , dev_paths + , dev_geoms + , hst_scene->geoms.size() + , dev_intersections + ); + checkCUDAError("trace one bounce"); + cudaMemcpy(dev_intersections_cache, dev_intersections, pixelcount_sub * sizeof(ShadeableIntersection), cudaMemcpyDeviceToDevice); + } + else if (depth == 0 && use_cache){ + cudaMemcpy(dev_intersections, dev_intersections_cache, pixelcount_sub * sizeof(ShadeableIntersection), cudaMemcpyDeviceToDevice); + } + else { + //printf("here"); + computeIntersections << > > ( + depth + , num_paths + , dev_paths + , dev_geoms + , hst_scene->geoms.size() + , dev_intersections + ); + checkCUDAError("trace one bounce"); + } + cudaDeviceSynchronize(); + #if USE_MATERIAL_SORT + thrust::sort_by_key(thrust::device, dev_intersections, dev_intersections + num_paths, dev_paths, sort_material_id()); + #endif + + // TODO: + // --- Shading Stage --- + // Shade path segments based on intersections and generate new rays by + // evaluating the BSDF. + // Start off with just a big kernel that handles all the different + // materials you have in the scenefile. + // TODO: compare between directly shading the path segments and shading + // path segments that have been reshuffled to be contiguous in memory. + + shadeMaterial << > > ( + iter, + num_paths, + dev_intersections, + dev_paths, + dev_materials + ); + + PathSegment* newEnd = thrust::stable_partition(thrust::device, dev_paths, dev_paths + num_paths, not_zero()); + num_paths = newEnd - dev_paths; + if (num_paths > 0) { + iterationComplete = false; + } + else { + iterationComplete = true; + } + depth++; + } + + num_paths = dev_path_end - dev_paths; - // Assemble this iteration and apply it to the image - dim3 numBlocksPixels = (pixelcount + blockSize1d - 1) / blockSize1d; - finalGather<<>>(num_paths, dev_image, dev_paths); + // Assemble this iteration and apply it to the image + dim3 numBlocksPixels = (pixelcount_sub + blockSize1d - 1) / blockSize1d; + finalGather << > > (num_paths, dev_image, dev_paths); - /////////////////////////////////////////////////////////////////////////// + /////////////////////////////////////////////////////////////////////////// - // Send results to OpenGL buffer for rendering - sendImageToPBO<<>>(pbo, cam.resolution, iter, dev_image); + // Send results to OpenGL buffer for rendering + sendImageToPBO << > > (pbo, cam.resolution, iter, dev_image); - // Retrieve image from GPU - cudaMemcpy(hst_scene->state.image.data(), dev_image, - pixelcount * sizeof(glm::vec3), cudaMemcpyDeviceToHost); + // Retrieve image from GPU + cudaMemcpy(hst_scene->state.image.data(), dev_image, + pixelcount * sizeof(glm::vec3), cudaMemcpyDeviceToHost); + std::chrono::duration diff = std::chrono::high_resolution_clock::now() - start; + std::cout << "Iteration time: " << diff.count() / (float)SUB_PIXEL_SAMPLE << std::endl; - checkCUDAError("pathtrace"); + checkCUDAError("pathtrace"); } diff --git a/src/preview.cpp b/src/preview.cpp index 4eb0bc13..1a17da9f 100644 --- a/src/preview.cpp +++ b/src/preview.cpp @@ -1,5 +1,6 @@ #define _CRT_SECURE_NO_DEPRECATE #include + #include "main.h" #include "preview.h" @@ -171,7 +172,9 @@ bool init() { void mainLoop() { while (!glfwWindowShouldClose(window)) { glfwPollEvents(); + runCuda(); + string title = "CIS565 Path Tracer | " + utilityCore::convertIntToString(iteration) + " Iterations"; glfwSetWindowTitle(window, title.c_str()); diff --git a/src/scene.cpp b/src/scene.cpp index 3fb6239a..2511086c 100644 --- a/src/scene.cpp +++ b/src/scene.cpp @@ -3,6 +3,8 @@ #include #include #include +#define TINYOBJLOADER_IMPLEMENTATION +#include "tiny_obj_loader.h" Scene::Scene(string filename) { cout << "Reading scene from " << filename << " ..." << endl; @@ -32,18 +34,56 @@ Scene::Scene(string filename) { } } +int Scene::loadObj(string filename, std::vector& geom) { + tinyobj::attrib_t attrib; + std::vector shapes; + std::vector materials; + std::string warn; + std::string err; + bool ret = tinyobj::LoadObj(&attrib, &shapes, &materials, &warn, &err, filename.c_str()); + for (size_t shape_ind = 0; shape_ind < shapes.size(); shape_ind++) { + size_t index = 0; + for (size_t face_ind = 0; face_ind < shapes[shape_ind].mesh.num_face_vertices.size(); face_ind++) { + Geom new_geom; + new_geom.type = TRIANGLE; + for (size_t vertex_ind = 0; vertex_ind < 3; vertex_ind++) { + tinyobj::index_t ind = shapes[shape_ind].mesh.indices[(index)]; + tinyobj::real_t vx = attrib.vertices[ind.vertex_index * 3 + 0]; + tinyobj::real_t vy = attrib.vertices[ind.vertex_index * 3 + 1]; + tinyobj::real_t vz = attrib.vertices[ind.vertex_index * 3 + 2]; + tinyobj::real_t nx = 0; + tinyobj::real_t ny = 0; + tinyobj::real_t nz = 0; + if (attrib.normals.size() > 0) { + nx = attrib.normals[ind.vertex_index * 3 + 0]; + ny = attrib.normals[ind.vertex_index * 3 + 1]; + nz = attrib.normals[ind.vertex_index * 3 + 2]; + } + new_geom.triangle.vertex[vertex_ind] = glm::vec3(vx, vy, vz); + new_geom.triangle.normals[vertex_ind] = glm::vec3(nx, ny, nz); + index++; + } + geom.push_back(new_geom); + } + } + return 1; +} + int Scene::loadGeom(string objectid) { int id = atoi(objectid.c_str()); if (id != geoms.size()) { - cout << "ERROR: OBJECT ID does not match expected number of geoms" << endl; - return -1; - } else { + id = geoms.size(); + //cout << "ERROR: OBJECT ID does not match expected number of geoms" << endl; + //return -1; + } cout << "Loading Geom " << id << "..." << endl; Geom newGeom; + std::vector mesh; // mesh loading string line; //load object type utilityCore::safeGetline(fp_in, line); + vector parts = utilityCore::tokenizeString(line); if (!line.empty() && fp_in.good()) { if (strcmp(line.c_str(), "sphere") == 0) { cout << "Creating new sphere..." << endl; @@ -52,6 +92,11 @@ int Scene::loadGeom(string objectid) { cout << "Creating new cube..." << endl; newGeom.type = CUBE; } + else if (strcmp(parts[0].c_str(), "mesh") == 0) { + cout << "Creating new mesh..." << endl; + newGeom.type = TRIANGLE; + loadObj(parts[1], mesh); + } } //link material @@ -78,15 +123,35 @@ int Scene::loadGeom(string objectid) { utilityCore::safeGetline(fp_in, line); } - - newGeom.transform = utilityCore::buildTransformationMatrix( + + if (mesh.size() > 0) { + for (size_t geom_ind = 0; geom_ind < mesh.size(); geom_ind++) { + Geom geom = mesh[geom_ind]; + geom.type = TRIANGLE; + geom.materialid = newGeom.materialid; + geom.transform = utilityCore::buildTransformationMatrix( + newGeom.translation, newGeom.rotation, newGeom.scale); + geom.inverseTransform = glm::inverse(newGeom.transform); + geom.invTranspose = glm::inverseTranspose(newGeom.transform); + for (int ind = 0; ind < 3; ind++) { + geom.triangle.vertex[ind] = glm::vec3(geom.transform * glm::vec4(geom.triangle.vertex[ind], 1.0f)); + geom.triangle.normals[ind] = glm::vec3(geom.invTranspose * glm::vec4(geom.triangle.normals[ind], 0.0f)); + //printf("%f \n", geom.triangle.vertex[ind].y); + } + geoms.push_back(geom); + } + } + else { + newGeom.transform = utilityCore::buildTransformationMatrix( newGeom.translation, newGeom.rotation, newGeom.scale); - newGeom.inverseTransform = glm::inverse(newGeom.transform); - newGeom.invTranspose = glm::inverseTranspose(newGeom.transform); + newGeom.inverseTransform = glm::inverse(newGeom.transform); + newGeom.invTranspose = glm::inverseTranspose(newGeom.transform); - geoms.push_back(newGeom); + geoms.push_back(newGeom); + } + return 1; - } + } int Scene::loadCamera() { @@ -112,6 +177,7 @@ int Scene::loadCamera() { } else if (strcmp(tokens[0].c_str(), "FILE") == 0) { state.imageName = tokens[1]; } + } string line; @@ -124,6 +190,10 @@ int Scene::loadCamera() { camera.lookAt = glm::vec3(atof(tokens[1].c_str()), atof(tokens[2].c_str()), atof(tokens[3].c_str())); } else if (strcmp(tokens[0].c_str(), "UP") == 0) { camera.up = glm::vec3(atof(tokens[1].c_str()), atof(tokens[2].c_str()), atof(tokens[3].c_str())); + } else if (strcmp(tokens[0].c_str(), "APERTURE") == 0) { + camera.aperture = atof(tokens[1].c_str()); + } else if (strcmp(tokens[0].c_str(), "FOCUS_DIST") == 0) { + camera.focus_dist = atof(tokens[1].c_str()); } utilityCore::safeGetline(fp_in, line); diff --git a/src/scene.h b/src/scene.h index f29a9171..2404b9b5 100644 --- a/src/scene.h +++ b/src/scene.h @@ -16,6 +16,7 @@ class Scene { int loadMaterial(string materialid); int loadGeom(string objectid); int loadCamera(); + int Scene::loadObj(string filename, std::vector& geom); public: Scene(string filename); ~Scene(); diff --git a/src/sceneStructs.h b/src/sceneStructs.h index da4dbf30..8b222341 100644 --- a/src/sceneStructs.h +++ b/src/sceneStructs.h @@ -10,6 +10,7 @@ enum GeomType { SPHERE, CUBE, + TRIANGLE, }; struct Ray { @@ -17,6 +18,11 @@ struct Ray { glm::vec3 direction; }; +struct Triangle { + glm::vec3 vertex[3]; + glm::vec3 normals[3]; +}; + struct Geom { enum GeomType type; int materialid; @@ -26,6 +32,7 @@ struct Geom { glm::mat4 transform; glm::mat4 inverseTransform; glm::mat4 invTranspose; + Triangle triangle; }; struct Material { @@ -49,6 +56,8 @@ struct Camera { glm::vec3 right; glm::vec2 fov; glm::vec2 pixelLength; + float aperture = 0.0f; + float focus_dist = 1.0f; }; struct RenderState { @@ -72,5 +81,6 @@ struct PathSegment { struct ShadeableIntersection { float t; glm::vec3 surfaceNormal; + glm::vec3 intersect_point; int materialId; }; diff --git a/src/tiny_obj_loader.cc b/src/tiny_obj_loader.cc new file mode 100644 index 00000000..e57d0444 --- /dev/null +++ b/src/tiny_obj_loader.cc @@ -0,0 +1,2 @@ +#define TINYOBJLOADER_IMPLEMENTATION +#include "tiny_obj_loader.h" diff --git a/src/tiny_obj_loader.h b/src/tiny_obj_loader.h new file mode 100644 index 00000000..38c8bd7c --- /dev/null +++ b/src/tiny_obj_loader.h @@ -0,0 +1,3318 @@ +/* +The MIT License (MIT) + +Copyright (c) 2012-Present, Syoyo Fujita and many contributors. + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in +all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +THE SOFTWARE. +*/ + +// +// version 2.0.0 : Add new object oriented API. 1.x API is still provided. +// * Support line primitive. +// * Support points primitive. +// * Support multiple search path for .mtl(v1 API). +// * Support vertex weight `vw`(as an tinyobj extension) +// * Support escaped whitespece in mtllib +// * Add robust triangulation using Mapbox earcut(TINYOBJLOADER_USE_MAPBOX_EARCUT). +// version 1.4.0 : Modifed ParseTextureNameAndOption API +// version 1.3.1 : Make ParseTextureNameAndOption API public +// version 1.3.0 : Separate warning and error message(breaking API of LoadObj) +// version 1.2.3 : Added color space extension('-colorspace') to tex opts. +// version 1.2.2 : Parse multiple group names. +// version 1.2.1 : Added initial support for line('l') primitive(PR #178) +// version 1.2.0 : Hardened implementation(#175) +// version 1.1.1 : Support smoothing groups(#162) +// version 1.1.0 : Support parsing vertex color(#144) +// version 1.0.8 : Fix parsing `g` tag just after `usemtl`(#138) +// version 1.0.7 : Support multiple tex options(#126) +// version 1.0.6 : Add TINYOBJLOADER_USE_DOUBLE option(#124) +// version 1.0.5 : Ignore `Tr` when `d` exists in MTL(#43) +// version 1.0.4 : Support multiple filenames for 'mtllib'(#112) +// version 1.0.3 : Support parsing texture options(#85) +// version 1.0.2 : Improve parsing speed by about a factor of 2 for large +// files(#105) +// version 1.0.1 : Fixes a shape is lost if obj ends with a 'usemtl'(#104) +// version 1.0.0 : Change data structure. Change license from BSD to MIT. +// + +// +// Use this in *one* .cc +// #define TINYOBJLOADER_IMPLEMENTATION +// #include "tiny_obj_loader.h" +// + +#ifndef TINY_OBJ_LOADER_H_ +#define TINY_OBJ_LOADER_H_ + +#include +#include +#include + +namespace tinyobj { + +// TODO(syoyo): Better C++11 detection for older compiler +#if __cplusplus > 199711L +#define TINYOBJ_OVERRIDE override +#else +#define TINYOBJ_OVERRIDE +#endif + +#ifdef __clang__ +#pragma clang diagnostic push +#if __has_warning("-Wzero-as-null-pointer-constant") +#pragma clang diagnostic ignored "-Wzero-as-null-pointer-constant" +#endif + +#pragma clang diagnostic ignored "-Wpadded" + +#endif + +// https://en.wikipedia.org/wiki/Wavefront_.obj_file says ... +// +// -blendu on | off # set horizontal texture blending +// (default on) +// -blendv on | off # set vertical texture blending +// (default on) +// -boost real_value # boost mip-map sharpness +// -mm base_value gain_value # modify texture map values (default +// 0 1) +// # base_value = brightness, +// gain_value = contrast +// -o u [v [w]] # Origin offset (default +// 0 0 0) +// -s u [v [w]] # Scale (default +// 1 1 1) +// -t u [v [w]] # Turbulence (default +// 0 0 0) +// -texres resolution # texture resolution to create +// -clamp on | off # only render texels in the clamped +// 0-1 range (default off) +// # When unclamped, textures are +// repeated across a surface, +// # when clamped, only texels which +// fall within the 0-1 +// # range are rendered. +// -bm mult_value # bump multiplier (for bump maps +// only) +// +// -imfchan r | g | b | m | l | z # specifies which channel of the file +// is used to +// # create a scalar or bump texture. +// r:red, g:green, +// # b:blue, m:matte, l:luminance, +// z:z-depth.. +// # (the default for bump is 'l' and +// for decal is 'm') +// bump -imfchan r bumpmap.tga # says to use the red channel of +// bumpmap.tga as the bumpmap +// +// For reflection maps... +// +// -type sphere # specifies a sphere for a "refl" +// reflection map +// -type cube_top | cube_bottom | # when using a cube map, the texture +// file for each +// cube_front | cube_back | # side of the cube is specified +// separately +// cube_left | cube_right +// +// TinyObjLoader extension. +// +// -colorspace SPACE # Color space of the texture. e.g. +// 'sRGB` or 'linear' +// + +#ifdef TINYOBJLOADER_USE_DOUBLE +//#pragma message "using double" +typedef double real_t; +#else +//#pragma message "using float" +typedef float real_t; +#endif + +typedef enum { + TEXTURE_TYPE_NONE, // default + TEXTURE_TYPE_SPHERE, + TEXTURE_TYPE_CUBE_TOP, + TEXTURE_TYPE_CUBE_BOTTOM, + TEXTURE_TYPE_CUBE_FRONT, + TEXTURE_TYPE_CUBE_BACK, + TEXTURE_TYPE_CUBE_LEFT, + TEXTURE_TYPE_CUBE_RIGHT +} texture_type_t; + +struct texture_option_t { + texture_type_t type; // -type (default TEXTURE_TYPE_NONE) + real_t sharpness; // -boost (default 1.0?) + real_t brightness; // base_value in -mm option (default 0) + real_t contrast; // gain_value in -mm option (default 1) + real_t origin_offset[3]; // -o u [v [w]] (default 0 0 0) + real_t scale[3]; // -s u [v [w]] (default 1 1 1) + real_t turbulence[3]; // -t u [v [w]] (default 0 0 0) + int texture_resolution; // -texres resolution (No default value in the spec. + // We'll use -1) + bool clamp; // -clamp (default false) + char imfchan; // -imfchan (the default for bump is 'l' and for decal is 'm') + bool blendu; // -blendu (default on) + bool blendv; // -blendv (default on) + real_t bump_multiplier; // -bm (for bump maps only, default 1.0) + + // extension + std::string colorspace; // Explicitly specify color space of stored texel + // value. Usually `sRGB` or `linear` (default empty). +}; + +struct material_t { + std::string name; + + real_t ambient[3]; + real_t diffuse[3]; + real_t specular[3]; + real_t transmittance[3]; + real_t emission[3]; + real_t shininess; + real_t ior; // index of refraction + real_t dissolve; // 1 == opaque; 0 == fully transparent + // illumination model (see http://www.fileformat.info/format/material/) + int illum; + + int dummy; // Suppress padding warning. + + std::string ambient_texname; // map_Ka + std::string diffuse_texname; // map_Kd + std::string specular_texname; // map_Ks + std::string specular_highlight_texname; // map_Ns + std::string bump_texname; // map_bump, map_Bump, bump + std::string displacement_texname; // disp + std::string alpha_texname; // map_d + std::string reflection_texname; // refl + + texture_option_t ambient_texopt; + texture_option_t diffuse_texopt; + texture_option_t specular_texopt; + texture_option_t specular_highlight_texopt; + texture_option_t bump_texopt; + texture_option_t displacement_texopt; + texture_option_t alpha_texopt; + texture_option_t reflection_texopt; + + // PBR extension + // http://exocortex.com/blog/extending_wavefront_mtl_to_support_pbr + real_t roughness; // [0, 1] default 0 + real_t metallic; // [0, 1] default 0 + real_t sheen; // [0, 1] default 0 + real_t clearcoat_thickness; // [0, 1] default 0 + real_t clearcoat_roughness; // [0, 1] default 0 + real_t anisotropy; // aniso. [0, 1] default 0 + real_t anisotropy_rotation; // anisor. [0, 1] default 0 + real_t pad0; + std::string roughness_texname; // map_Pr + std::string metallic_texname; // map_Pm + std::string sheen_texname; // map_Ps + std::string emissive_texname; // map_Ke + std::string normal_texname; // norm. For normal mapping. + + texture_option_t roughness_texopt; + texture_option_t metallic_texopt; + texture_option_t sheen_texopt; + texture_option_t emissive_texopt; + texture_option_t normal_texopt; + + int pad2; + + std::map unknown_parameter; + +#ifdef TINY_OBJ_LOADER_PYTHON_BINDING + // For pybind11 + std::array GetDiffuse() { + std::array values; + values[0] = double(diffuse[0]); + values[1] = double(diffuse[1]); + values[2] = double(diffuse[2]); + + return values; + } + + std::array GetSpecular() { + std::array values; + values[0] = double(specular[0]); + values[1] = double(specular[1]); + values[2] = double(specular[2]); + + return values; + } + + std::array GetTransmittance() { + std::array values; + values[0] = double(transmittance[0]); + values[1] = double(transmittance[1]); + values[2] = double(transmittance[2]); + + return values; + } + + std::array GetEmission() { + std::array values; + values[0] = double(emission[0]); + values[1] = double(emission[1]); + values[2] = double(emission[2]); + + return values; + } + + std::array GetAmbient() { + std::array values; + values[0] = double(ambient[0]); + values[1] = double(ambient[1]); + values[2] = double(ambient[2]); + + return values; + } + + void SetDiffuse(std::array &a) { + diffuse[0] = real_t(a[0]); + diffuse[1] = real_t(a[1]); + diffuse[2] = real_t(a[2]); + } + + void SetAmbient(std::array &a) { + ambient[0] = real_t(a[0]); + ambient[1] = real_t(a[1]); + ambient[2] = real_t(a[2]); + } + + void SetSpecular(std::array &a) { + specular[0] = real_t(a[0]); + specular[1] = real_t(a[1]); + specular[2] = real_t(a[2]); + } + + void SetTransmittance(std::array &a) { + transmittance[0] = real_t(a[0]); + transmittance[1] = real_t(a[1]); + transmittance[2] = real_t(a[2]); + } + + std::string GetCustomParameter(const std::string &key) { + std::map::const_iterator it = + unknown_parameter.find(key); + + if (it != unknown_parameter.end()) { + return it->second; + } + return std::string(); + } + +#endif +}; + +struct tag_t { + std::string name; + + std::vector intValues; + std::vector floatValues; + std::vector stringValues; +}; + +struct joint_and_weight_t { + int joint_id; + real_t weight; +}; + +struct skin_weight_t { + int vertex_id; // Corresponding vertex index in `attrib_t::vertices`. + // Compared to `index_t`, this index must be positive and + // start with 0(does not allow relative indexing) + std::vector weightValues; +}; + +// Index struct to support different indices for vtx/normal/texcoord. +// -1 means not used. +struct index_t { + int vertex_index; + int normal_index; + int texcoord_index; +}; + +struct mesh_t { + std::vector indices; + std::vector + num_face_vertices; // The number of vertices per + // face. 3 = triangle, 4 = quad, + // ... Up to 255 vertices per face. + std::vector material_ids; // per-face material ID + std::vector smoothing_group_ids; // per-face smoothing group + // ID(0 = off. positive value + // = group id) + std::vector tags; // SubD tag +}; + +// struct path_t { +// std::vector indices; // pairs of indices for lines +//}; + +struct lines_t { + // Linear flattened indices. + std::vector indices; // indices for vertices(poly lines) + std::vector num_line_vertices; // The number of vertices per line. +}; + +struct points_t { + std::vector indices; // indices for points +}; + +struct shape_t { + std::string name; + mesh_t mesh; + lines_t lines; + points_t points; +}; + +// Vertex attributes +struct attrib_t { + std::vector vertices; // 'v'(xyz) + + // For backward compatibility, we store vertex weight in separate array. + std::vector vertex_weights; // 'v'(w) + std::vector normals; // 'vn' + std::vector texcoords; // 'vt'(uv) + + // For backward compatibility, we store texture coordinate 'w' in separate + // array. + std::vector texcoord_ws; // 'vt'(w) + std::vector colors; // extension: vertex colors + + // + // TinyObj extension. + // + + // NOTE(syoyo): array index is based on the appearance order. + // To get a corresponding skin weight for a specific vertex id `vid`, + // Need to reconstruct a look up table: `skin_weight_t::vertex_id` == `vid` + // (e.g. using std::map, std::unordered_map) + std::vector skin_weights; + + attrib_t() {} + + // + // For pybind11 + // + const std::vector &GetVertices() const { return vertices; } + + const std::vector &GetVertexWeights() const { return vertex_weights; } +}; + +struct callback_t { + // W is optional and set to 1 if there is no `w` item in `v` line + void (*vertex_cb)(void *user_data, real_t x, real_t y, real_t z, real_t w); + void (*normal_cb)(void *user_data, real_t x, real_t y, real_t z); + + // y and z are optional and set to 0 if there is no `y` and/or `z` item(s) in + // `vt` line. + void (*texcoord_cb)(void *user_data, real_t x, real_t y, real_t z); + + // called per 'f' line. num_indices is the number of face indices(e.g. 3 for + // triangle, 4 for quad) + // 0 will be passed for undefined index in index_t members. + void (*index_cb)(void *user_data, index_t *indices, int num_indices); + // `name` material name, `material_id` = the array index of material_t[]. -1 + // if + // a material not found in .mtl + void (*usemtl_cb)(void *user_data, const char *name, int material_id); + // `materials` = parsed material data. + void (*mtllib_cb)(void *user_data, const material_t *materials, + int num_materials); + // There may be multiple group names + void (*group_cb)(void *user_data, const char **names, int num_names); + void (*object_cb)(void *user_data, const char *name); + + callback_t() + : vertex_cb(NULL), + normal_cb(NULL), + texcoord_cb(NULL), + index_cb(NULL), + usemtl_cb(NULL), + mtllib_cb(NULL), + group_cb(NULL), + object_cb(NULL) {} +}; + +class MaterialReader { + public: + MaterialReader() {} + virtual ~MaterialReader(); + + virtual bool operator()(const std::string &matId, + std::vector *materials, + std::map *matMap, std::string *warn, + std::string *err) = 0; +}; + +/// +/// Read .mtl from a file. +/// +class MaterialFileReader : public MaterialReader { + public: + // Path could contain separator(';' in Windows, ':' in Posix) + explicit MaterialFileReader(const std::string &mtl_basedir) + : m_mtlBaseDir(mtl_basedir) {} + virtual ~MaterialFileReader() TINYOBJ_OVERRIDE {} + virtual bool operator()(const std::string &matId, + std::vector *materials, + std::map *matMap, std::string *warn, + std::string *err) TINYOBJ_OVERRIDE; + + private: + std::string m_mtlBaseDir; +}; + +/// +/// Read .mtl from a stream. +/// +class MaterialStreamReader : public MaterialReader { + public: + explicit MaterialStreamReader(std::istream &inStream) + : m_inStream(inStream) {} + virtual ~MaterialStreamReader() TINYOBJ_OVERRIDE {} + virtual bool operator()(const std::string &matId, + std::vector *materials, + std::map *matMap, std::string *warn, + std::string *err) TINYOBJ_OVERRIDE; + + private: + std::istream &m_inStream; +}; + +// v2 API +struct ObjReaderConfig { + bool triangulate; // triangulate polygon? + + // Currently not used. + // "simple" or empty: Create triangle fan + // "earcut": Use the algorithm based on Ear clipping + std::string triangulation_method; + + /// Parse vertex color. + /// If vertex color is not present, its filled with default value. + /// false = no vertex color + /// This will increase memory of parsed .obj + bool vertex_color; + + /// + /// Search path to .mtl file. + /// Default = "" = search from the same directory of .obj file. + /// Valid only when loading .obj from a file. + /// + std::string mtl_search_path; + + ObjReaderConfig() + : triangulate(true), triangulation_method("simple"), vertex_color(true) {} +}; + +/// +/// Wavefront .obj reader class(v2 API) +/// +class ObjReader { + public: + ObjReader() : valid_(false) {} + + /// + /// Load .obj and .mtl from a file. + /// + /// @param[in] filename wavefront .obj filename + /// @param[in] config Reader configuration + /// + bool ParseFromFile(const std::string &filename, + const ObjReaderConfig &config = ObjReaderConfig()); + + /// + /// Parse .obj from a text string. + /// Need to supply .mtl text string by `mtl_text`. + /// This function ignores `mtllib` line in .obj text. + /// + /// @param[in] obj_text wavefront .obj filename + /// @param[in] mtl_text wavefront .mtl filename + /// @param[in] config Reader configuration + /// + bool ParseFromString(const std::string &obj_text, const std::string &mtl_text, + const ObjReaderConfig &config = ObjReaderConfig()); + + /// + /// .obj was loaded or parsed correctly. + /// + bool Valid() const { return valid_; } + + const attrib_t &GetAttrib() const { return attrib_; } + + const std::vector &GetShapes() const { return shapes_; } + + const std::vector &GetMaterials() const { return materials_; } + + /// + /// Warning message(may be filled after `Load` or `Parse`) + /// + const std::string &Warning() const { return warning_; } + + /// + /// Error message(filled when `Load` or `Parse` failed) + /// + const std::string &Error() const { return error_; } + + private: + bool valid_; + + attrib_t attrib_; + std::vector shapes_; + std::vector materials_; + + std::string warning_; + std::string error_; +}; + +/// ==>>========= Legacy v1 API ============================================= + +/// Loads .obj from a file. +/// 'attrib', 'shapes' and 'materials' will be filled with parsed shape data +/// 'shapes' will be filled with parsed shape data +/// Returns true when loading .obj become success. +/// Returns warning message into `warn`, and error message into `err` +/// 'mtl_basedir' is optional, and used for base directory for .mtl file. +/// In default(`NULL'), .mtl file is searched from an application's working +/// directory. +/// 'triangulate' is optional, and used whether triangulate polygon face in .obj +/// or not. +/// Option 'default_vcols_fallback' specifies whether vertex colors should +/// always be defined, even if no colors are given (fallback to white). +bool LoadObj(attrib_t *attrib, std::vector *shapes, + std::vector *materials, std::string *warn, + std::string *err, const char *filename, + const char *mtl_basedir = NULL, bool triangulate = true, + bool default_vcols_fallback = true); + +/// Loads .obj from a file with custom user callback. +/// .mtl is loaded as usual and parsed material_t data will be passed to +/// `callback.mtllib_cb`. +/// Returns true when loading .obj/.mtl become success. +/// Returns warning message into `warn`, and error message into `err` +/// See `examples/callback_api/` for how to use this function. +bool LoadObjWithCallback(std::istream &inStream, const callback_t &callback, + void *user_data = NULL, + MaterialReader *readMatFn = NULL, + std::string *warn = NULL, std::string *err = NULL); + +/// Loads object from a std::istream, uses `readMatFn` to retrieve +/// std::istream for materials. +/// Returns true when loading .obj become success. +/// Returns warning and error message into `err` +bool LoadObj(attrib_t *attrib, std::vector *shapes, + std::vector *materials, std::string *warn, + std::string *err, std::istream *inStream, + MaterialReader *readMatFn = NULL, bool triangulate = true, + bool default_vcols_fallback = true); + +/// Loads materials into std::map +void LoadMtl(std::map *material_map, + std::vector *materials, std::istream *inStream, + std::string *warning, std::string *err); + +/// +/// Parse texture name and texture option for custom texture parameter through +/// material::unknown_parameter +/// +/// @param[out] texname Parsed texture name +/// @param[out] texopt Parsed texopt +/// @param[in] linebuf Input string +/// +bool ParseTextureNameAndOption(std::string *texname, texture_option_t *texopt, + const char *linebuf); + +/// =<<========== Legacy v1 API ============================================= + +} // namespace tinyobj + +#endif // TINY_OBJ_LOADER_H_ + +#ifdef TINYOBJLOADER_IMPLEMENTATION +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#ifdef TINYOBJLOADER_USE_MAPBOX_EARCUT + +#ifdef TINYOBJLOADER_DONOT_INCLUDE_MAPBOX_EARCUT +// Assume earcut.hpp is included outside of tiny_obj_loader.h +#else + +#ifdef __clang__ +#pragma clang diagnostic push +#pragma clang diagnostic ignored "-Weverything" +#endif + +#include +#include "mapbox/earcut.hpp" + +#ifdef __clang__ +#pragma clang diagnostic pop +#endif + +#endif + +#endif // TINYOBJLOADER_USE_MAPBOX_EARCUT + +namespace tinyobj { + +MaterialReader::~MaterialReader() {} + +struct vertex_index_t { + int v_idx, vt_idx, vn_idx; + vertex_index_t() : v_idx(-1), vt_idx(-1), vn_idx(-1) {} + explicit vertex_index_t(int idx) : v_idx(idx), vt_idx(idx), vn_idx(idx) {} + vertex_index_t(int vidx, int vtidx, int vnidx) + : v_idx(vidx), vt_idx(vtidx), vn_idx(vnidx) {} +}; + +// Internal data structure for face representation +// index + smoothing group. +struct face_t { + unsigned int + smoothing_group_id; // smoothing group id. 0 = smoothing groupd is off. + int pad_; + std::vector vertex_indices; // face vertex indices. + + face_t() : smoothing_group_id(0), pad_(0) {} +}; + +// Internal data structure for line representation +struct __line_t { + // l v1/vt1 v2/vt2 ... + // In the specification, line primitrive does not have normal index, but + // TinyObjLoader allow it + std::vector vertex_indices; +}; + +// Internal data structure for points representation +struct __points_t { + // p v1 v2 ... + // In the specification, point primitrive does not have normal index and + // texture coord index, but TinyObjLoader allow it. + std::vector vertex_indices; +}; + +struct tag_sizes { + tag_sizes() : num_ints(0), num_reals(0), num_strings(0) {} + int num_ints; + int num_reals; + int num_strings; +}; + +struct obj_shape { + std::vector v; + std::vector vn; + std::vector vt; +}; + +// +// Manages group of primitives(face, line, points, ...) +struct PrimGroup { + std::vector faceGroup; + std::vector<__line_t> lineGroup; + std::vector<__points_t> pointsGroup; + + void clear() { + faceGroup.clear(); + lineGroup.clear(); + pointsGroup.clear(); + } + + bool IsEmpty() const { + return faceGroup.empty() && lineGroup.empty() && pointsGroup.empty(); + } + + // TODO(syoyo): bspline, surface, ... +}; + +// See +// http://stackoverflow.com/questions/6089231/getting-std-ifstream-to-handle-lf-cr-and-crlf +static std::istream &safeGetline(std::istream &is, std::string &t) { + t.clear(); + + // The characters in the stream are read one-by-one using a std::streambuf. + // That is faster than reading them one-by-one using the std::istream. + // Code that uses streambuf this way must be guarded by a sentry object. + // The sentry object performs various tasks, + // such as thread synchronization and updating the stream state. + + std::istream::sentry se(is, true); + std::streambuf *sb = is.rdbuf(); + + if (se) { + for (;;) { + int c = sb->sbumpc(); + switch (c) { + case '\n': + return is; + case '\r': + if (sb->sgetc() == '\n') sb->sbumpc(); + return is; + case EOF: + // Also handle the case when the last line has no line ending + if (t.empty()) is.setstate(std::ios::eofbit); + return is; + default: + t += static_cast(c); + } + } + } + + return is; +} + +#define IS_SPACE(x) (((x) == ' ') || ((x) == '\t')) +#define IS_DIGIT(x) \ + (static_cast((x) - '0') < static_cast(10)) +#define IS_NEW_LINE(x) (((x) == '\r') || ((x) == '\n') || ((x) == '\0')) + +// Make index zero-base, and also support relative index. +static inline bool fixIndex(int idx, int n, int *ret) { + if (!ret) { + return false; + } + + if (idx > 0) { + (*ret) = idx - 1; + return true; + } + + if (idx == 0) { + // zero is not allowed according to the spec. + return false; + } + + if (idx < 0) { + (*ret) = n + idx; // negative value = relative + return true; + } + + return false; // never reach here. +} + +static inline std::string parseString(const char **token) { + std::string s; + (*token) += strspn((*token), " \t"); + size_t e = strcspn((*token), " \t\r"); + s = std::string((*token), &(*token)[e]); + (*token) += e; + return s; +} + +static inline int parseInt(const char **token) { + (*token) += strspn((*token), " \t"); + int i = atoi((*token)); + (*token) += strcspn((*token), " \t\r"); + return i; +} + +// Tries to parse a floating point number located at s. +// +// s_end should be a location in the string where reading should absolutely +// stop. For example at the end of the string, to prevent buffer overflows. +// +// Parses the following EBNF grammar: +// sign = "+" | "-" ; +// END = ? anything not in digit ? +// digit = "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9" ; +// integer = [sign] , digit , {digit} ; +// decimal = integer , ["." , integer] ; +// float = ( decimal , END ) | ( decimal , ("E" | "e") , integer , END ) ; +// +// Valid strings are for example: +// -0 +3.1417e+2 -0.0E-3 1.0324 -1.41 11e2 +// +// If the parsing is a success, result is set to the parsed value and true +// is returned. +// +// The function is greedy and will parse until any of the following happens: +// - a non-conforming character is encountered. +// - s_end is reached. +// +// The following situations triggers a failure: +// - s >= s_end. +// - parse failure. +// +static bool tryParseDouble(const char *s, const char *s_end, double *result) { + if (s >= s_end) { + return false; + } + + double mantissa = 0.0; + // This exponent is base 2 rather than 10. + // However the exponent we parse is supposed to be one of ten, + // thus we must take care to convert the exponent/and or the + // mantissa to a * 2^E, where a is the mantissa and E is the + // exponent. + // To get the final double we will use ldexp, it requires the + // exponent to be in base 2. + int exponent = 0; + + // NOTE: THESE MUST BE DECLARED HERE SINCE WE ARE NOT ALLOWED + // TO JUMP OVER DEFINITIONS. + char sign = '+'; + char exp_sign = '+'; + char const *curr = s; + + // How many characters were read in a loop. + int read = 0; + // Tells whether a loop terminated due to reaching s_end. + bool end_not_reached = false; + bool leading_decimal_dots = false; + + /* + BEGIN PARSING. + */ + + // Find out what sign we've got. + if (*curr == '+' || *curr == '-') { + sign = *curr; + curr++; + if ((curr != s_end) && (*curr == '.')) { + // accept. Somethig like `.7e+2`, `-.5234` + leading_decimal_dots = true; + } + } else if (IS_DIGIT(*curr)) { /* Pass through. */ + } else if (*curr == '.') { + // accept. Somethig like `.7e+2`, `-.5234` + leading_decimal_dots = true; + } else { + goto fail; + } + + // Read the integer part. + end_not_reached = (curr != s_end); + if (!leading_decimal_dots) { + while (end_not_reached && IS_DIGIT(*curr)) { + mantissa *= 10; + mantissa += static_cast(*curr - 0x30); + curr++; + read++; + end_not_reached = (curr != s_end); + } + + // We must make sure we actually got something. + if (read == 0) goto fail; + } + + // We allow numbers of form "#", "###" etc. + if (!end_not_reached) goto assemble; + + // Read the decimal part. + if (*curr == '.') { + curr++; + read = 1; + end_not_reached = (curr != s_end); + while (end_not_reached && IS_DIGIT(*curr)) { + static const double pow_lut[] = { + 1.0, 0.1, 0.01, 0.001, 0.0001, 0.00001, 0.000001, 0.0000001, + }; + const int lut_entries = sizeof pow_lut / sizeof pow_lut[0]; + + // NOTE: Don't use powf here, it will absolutely murder precision. + mantissa += static_cast(*curr - 0x30) * + (read < lut_entries ? pow_lut[read] : std::pow(10.0, -read)); + read++; + curr++; + end_not_reached = (curr != s_end); + } + } else if (*curr == 'e' || *curr == 'E') { + } else { + goto assemble; + } + + if (!end_not_reached) goto assemble; + + // Read the exponent part. + if (*curr == 'e' || *curr == 'E') { + curr++; + // Figure out if a sign is present and if it is. + end_not_reached = (curr != s_end); + if (end_not_reached && (*curr == '+' || *curr == '-')) { + exp_sign = *curr; + curr++; + } else if (IS_DIGIT(*curr)) { /* Pass through. */ + } else { + // Empty E is not allowed. + goto fail; + } + + read = 0; + end_not_reached = (curr != s_end); + while (end_not_reached && IS_DIGIT(*curr)) { + // To avoid annoying MSVC's min/max macro definiton, + // Use hardcoded int max value + if (exponent > (2147483647/10)) { // 2147483647 = std::numeric_limits::max() + // Integer overflow + goto fail; + } + exponent *= 10; + exponent += static_cast(*curr - 0x30); + curr++; + read++; + end_not_reached = (curr != s_end); + } + exponent *= (exp_sign == '+' ? 1 : -1); + if (read == 0) goto fail; + } + +assemble: + *result = (sign == '+' ? 1 : -1) * + (exponent ? std::ldexp(mantissa * std::pow(5.0, exponent), exponent) + : mantissa); + return true; +fail: + return false; +} + +static inline real_t parseReal(const char **token, double default_value = 0.0) { + (*token) += strspn((*token), " \t"); + const char *end = (*token) + strcspn((*token), " \t\r"); + double val = default_value; + tryParseDouble((*token), end, &val); + real_t f = static_cast(val); + (*token) = end; + return f; +} + +static inline bool parseReal(const char **token, real_t *out) { + (*token) += strspn((*token), " \t"); + const char *end = (*token) + strcspn((*token), " \t\r"); + double val; + bool ret = tryParseDouble((*token), end, &val); + if (ret) { + real_t f = static_cast(val); + (*out) = f; + } + (*token) = end; + return ret; +} + +static inline void parseReal2(real_t *x, real_t *y, const char **token, + const double default_x = 0.0, + const double default_y = 0.0) { + (*x) = parseReal(token, default_x); + (*y) = parseReal(token, default_y); +} + +static inline void parseReal3(real_t *x, real_t *y, real_t *z, + const char **token, const double default_x = 0.0, + const double default_y = 0.0, + const double default_z = 0.0) { + (*x) = parseReal(token, default_x); + (*y) = parseReal(token, default_y); + (*z) = parseReal(token, default_z); +} + +static inline void parseV(real_t *x, real_t *y, real_t *z, real_t *w, + const char **token, const double default_x = 0.0, + const double default_y = 0.0, + const double default_z = 0.0, + const double default_w = 1.0) { + (*x) = parseReal(token, default_x); + (*y) = parseReal(token, default_y); + (*z) = parseReal(token, default_z); + (*w) = parseReal(token, default_w); +} + +// Extension: parse vertex with colors(6 items) +static inline bool parseVertexWithColor(real_t *x, real_t *y, real_t *z, + real_t *r, real_t *g, real_t *b, + const char **token, + const double default_x = 0.0, + const double default_y = 0.0, + const double default_z = 0.0) { + (*x) = parseReal(token, default_x); + (*y) = parseReal(token, default_y); + (*z) = parseReal(token, default_z); + + const bool found_color = + parseReal(token, r) && parseReal(token, g) && parseReal(token, b); + + if (!found_color) { + (*r) = (*g) = (*b) = 1.0; + } + + return found_color; +} + +static inline bool parseOnOff(const char **token, bool default_value = true) { + (*token) += strspn((*token), " \t"); + const char *end = (*token) + strcspn((*token), " \t\r"); + + bool ret = default_value; + if ((0 == strncmp((*token), "on", 2))) { + ret = true; + } else if ((0 == strncmp((*token), "off", 3))) { + ret = false; + } + + (*token) = end; + return ret; +} + +static inline texture_type_t parseTextureType( + const char **token, texture_type_t default_value = TEXTURE_TYPE_NONE) { + (*token) += strspn((*token), " \t"); + const char *end = (*token) + strcspn((*token), " \t\r"); + texture_type_t ty = default_value; + + if ((0 == strncmp((*token), "cube_top", strlen("cube_top")))) { + ty = TEXTURE_TYPE_CUBE_TOP; + } else if ((0 == strncmp((*token), "cube_bottom", strlen("cube_bottom")))) { + ty = TEXTURE_TYPE_CUBE_BOTTOM; + } else if ((0 == strncmp((*token), "cube_left", strlen("cube_left")))) { + ty = TEXTURE_TYPE_CUBE_LEFT; + } else if ((0 == strncmp((*token), "cube_right", strlen("cube_right")))) { + ty = TEXTURE_TYPE_CUBE_RIGHT; + } else if ((0 == strncmp((*token), "cube_front", strlen("cube_front")))) { + ty = TEXTURE_TYPE_CUBE_FRONT; + } else if ((0 == strncmp((*token), "cube_back", strlen("cube_back")))) { + ty = TEXTURE_TYPE_CUBE_BACK; + } else if ((0 == strncmp((*token), "sphere", strlen("sphere")))) { + ty = TEXTURE_TYPE_SPHERE; + } + + (*token) = end; + return ty; +} + +static tag_sizes parseTagTriple(const char **token) { + tag_sizes ts; + + (*token) += strspn((*token), " \t"); + ts.num_ints = atoi((*token)); + (*token) += strcspn((*token), "/ \t\r"); + if ((*token)[0] != '/') { + return ts; + } + + (*token)++; // Skip '/' + + (*token) += strspn((*token), " \t"); + ts.num_reals = atoi((*token)); + (*token) += strcspn((*token), "/ \t\r"); + if ((*token)[0] != '/') { + return ts; + } + (*token)++; // Skip '/' + + ts.num_strings = parseInt(token); + + return ts; +} + +// Parse triples with index offsets: i, i/j/k, i//k, i/j +static bool parseTriple(const char **token, int vsize, int vnsize, int vtsize, + vertex_index_t *ret) { + if (!ret) { + return false; + } + + vertex_index_t vi(-1); + + if (!fixIndex(atoi((*token)), vsize, &(vi.v_idx))) { + return false; + } + + (*token) += strcspn((*token), "/ \t\r"); + if ((*token)[0] != '/') { + (*ret) = vi; + return true; + } + (*token)++; + + // i//k + if ((*token)[0] == '/') { + (*token)++; + if (!fixIndex(atoi((*token)), vnsize, &(vi.vn_idx))) { + return false; + } + (*token) += strcspn((*token), "/ \t\r"); + (*ret) = vi; + return true; + } + + // i/j/k or i/j + if (!fixIndex(atoi((*token)), vtsize, &(vi.vt_idx))) { + return false; + } + + (*token) += strcspn((*token), "/ \t\r"); + if ((*token)[0] != '/') { + (*ret) = vi; + return true; + } + + // i/j/k + (*token)++; // skip '/' + if (!fixIndex(atoi((*token)), vnsize, &(vi.vn_idx))) { + return false; + } + (*token) += strcspn((*token), "/ \t\r"); + + (*ret) = vi; + + return true; +} + +// Parse raw triples: i, i/j/k, i//k, i/j +static vertex_index_t parseRawTriple(const char **token) { + vertex_index_t vi(static_cast(0)); // 0 is an invalid index in OBJ + + vi.v_idx = atoi((*token)); + (*token) += strcspn((*token), "/ \t\r"); + if ((*token)[0] != '/') { + return vi; + } + (*token)++; + + // i//k + if ((*token)[0] == '/') { + (*token)++; + vi.vn_idx = atoi((*token)); + (*token) += strcspn((*token), "/ \t\r"); + return vi; + } + + // i/j/k or i/j + vi.vt_idx = atoi((*token)); + (*token) += strcspn((*token), "/ \t\r"); + if ((*token)[0] != '/') { + return vi; + } + + // i/j/k + (*token)++; // skip '/' + vi.vn_idx = atoi((*token)); + (*token) += strcspn((*token), "/ \t\r"); + return vi; +} + +bool ParseTextureNameAndOption(std::string *texname, texture_option_t *texopt, + const char *linebuf) { + // @todo { write more robust lexer and parser. } + bool found_texname = false; + std::string texture_name; + + const char *token = linebuf; // Assume line ends with NULL + + while (!IS_NEW_LINE((*token))) { + token += strspn(token, " \t"); // skip space + if ((0 == strncmp(token, "-blendu", 7)) && IS_SPACE((token[7]))) { + token += 8; + texopt->blendu = parseOnOff(&token, /* default */ true); + } else if ((0 == strncmp(token, "-blendv", 7)) && IS_SPACE((token[7]))) { + token += 8; + texopt->blendv = parseOnOff(&token, /* default */ true); + } else if ((0 == strncmp(token, "-clamp", 6)) && IS_SPACE((token[6]))) { + token += 7; + texopt->clamp = parseOnOff(&token, /* default */ true); + } else if ((0 == strncmp(token, "-boost", 6)) && IS_SPACE((token[6]))) { + token += 7; + texopt->sharpness = parseReal(&token, 1.0); + } else if ((0 == strncmp(token, "-bm", 3)) && IS_SPACE((token[3]))) { + token += 4; + texopt->bump_multiplier = parseReal(&token, 1.0); + } else if ((0 == strncmp(token, "-o", 2)) && IS_SPACE((token[2]))) { + token += 3; + parseReal3(&(texopt->origin_offset[0]), &(texopt->origin_offset[1]), + &(texopt->origin_offset[2]), &token); + } else if ((0 == strncmp(token, "-s", 2)) && IS_SPACE((token[2]))) { + token += 3; + parseReal3(&(texopt->scale[0]), &(texopt->scale[1]), &(texopt->scale[2]), + &token, 1.0, 1.0, 1.0); + } else if ((0 == strncmp(token, "-t", 2)) && IS_SPACE((token[2]))) { + token += 3; + parseReal3(&(texopt->turbulence[0]), &(texopt->turbulence[1]), + &(texopt->turbulence[2]), &token); + } else if ((0 == strncmp(token, "-type", 5)) && IS_SPACE((token[5]))) { + token += 5; + texopt->type = parseTextureType((&token), TEXTURE_TYPE_NONE); + } else if ((0 == strncmp(token, "-texres", 7)) && IS_SPACE((token[7]))) { + token += 7; + // TODO(syoyo): Check if arg is int type. + texopt->texture_resolution = parseInt(&token); + } else if ((0 == strncmp(token, "-imfchan", 8)) && IS_SPACE((token[8]))) { + token += 9; + token += strspn(token, " \t"); + const char *end = token + strcspn(token, " \t\r"); + if ((end - token) == 1) { // Assume one char for -imfchan + texopt->imfchan = (*token); + } + token = end; + } else if ((0 == strncmp(token, "-mm", 3)) && IS_SPACE((token[3]))) { + token += 4; + parseReal2(&(texopt->brightness), &(texopt->contrast), &token, 0.0, 1.0); + } else if ((0 == strncmp(token, "-colorspace", 11)) && + IS_SPACE((token[11]))) { + token += 12; + texopt->colorspace = parseString(&token); + } else { +// Assume texture filename +#if 0 + size_t len = strcspn(token, " \t\r"); // untile next space + texture_name = std::string(token, token + len); + token += len; + + token += strspn(token, " \t"); // skip space +#else + // Read filename until line end to parse filename containing whitespace + // TODO(syoyo): Support parsing texture option flag after the filename. + texture_name = std::string(token); + token += texture_name.length(); +#endif + + found_texname = true; + } + } + + if (found_texname) { + (*texname) = texture_name; + return true; + } else { + return false; + } +} + +static void InitTexOpt(texture_option_t *texopt, const bool is_bump) { + if (is_bump) { + texopt->imfchan = 'l'; + } else { + texopt->imfchan = 'm'; + } + texopt->bump_multiplier = static_cast(1.0); + texopt->clamp = false; + texopt->blendu = true; + texopt->blendv = true; + texopt->sharpness = static_cast(1.0); + texopt->brightness = static_cast(0.0); + texopt->contrast = static_cast(1.0); + texopt->origin_offset[0] = static_cast(0.0); + texopt->origin_offset[1] = static_cast(0.0); + texopt->origin_offset[2] = static_cast(0.0); + texopt->scale[0] = static_cast(1.0); + texopt->scale[1] = static_cast(1.0); + texopt->scale[2] = static_cast(1.0); + texopt->turbulence[0] = static_cast(0.0); + texopt->turbulence[1] = static_cast(0.0); + texopt->turbulence[2] = static_cast(0.0); + texopt->texture_resolution = -1; + texopt->type = TEXTURE_TYPE_NONE; +} + +static void InitMaterial(material_t *material) { + InitTexOpt(&material->ambient_texopt, /* is_bump */ false); + InitTexOpt(&material->diffuse_texopt, /* is_bump */ false); + InitTexOpt(&material->specular_texopt, /* is_bump */ false); + InitTexOpt(&material->specular_highlight_texopt, /* is_bump */ false); + InitTexOpt(&material->bump_texopt, /* is_bump */ true); + InitTexOpt(&material->displacement_texopt, /* is_bump */ false); + InitTexOpt(&material->alpha_texopt, /* is_bump */ false); + InitTexOpt(&material->reflection_texopt, /* is_bump */ false); + InitTexOpt(&material->roughness_texopt, /* is_bump */ false); + InitTexOpt(&material->metallic_texopt, /* is_bump */ false); + InitTexOpt(&material->sheen_texopt, /* is_bump */ false); + InitTexOpt(&material->emissive_texopt, /* is_bump */ false); + InitTexOpt(&material->normal_texopt, + /* is_bump */ false); // @fixme { is_bump will be true? } + material->name = ""; + material->ambient_texname = ""; + material->diffuse_texname = ""; + material->specular_texname = ""; + material->specular_highlight_texname = ""; + material->bump_texname = ""; + material->displacement_texname = ""; + material->reflection_texname = ""; + material->alpha_texname = ""; + for (int i = 0; i < 3; i++) { + material->ambient[i] = static_cast(0.0); + material->diffuse[i] = static_cast(0.0); + material->specular[i] = static_cast(0.0); + material->transmittance[i] = static_cast(0.0); + material->emission[i] = static_cast(0.0); + } + material->illum = 0; + material->dissolve = static_cast(1.0); + material->shininess = static_cast(1.0); + material->ior = static_cast(1.0); + + material->roughness = static_cast(0.0); + material->metallic = static_cast(0.0); + material->sheen = static_cast(0.0); + material->clearcoat_thickness = static_cast(0.0); + material->clearcoat_roughness = static_cast(0.0); + material->anisotropy_rotation = static_cast(0.0); + material->anisotropy = static_cast(0.0); + material->roughness_texname = ""; + material->metallic_texname = ""; + material->sheen_texname = ""; + material->emissive_texname = ""; + material->normal_texname = ""; + + material->unknown_parameter.clear(); +} + +// code from https://wrf.ecse.rpi.edu//Research/Short_Notes/pnpoly.html +template +static int pnpoly(int nvert, T *vertx, T *verty, T testx, T testy) { + int i, j, c = 0; + for (i = 0, j = nvert - 1; i < nvert; j = i++) { + if (((verty[i] > testy) != (verty[j] > testy)) && + (testx < + (vertx[j] - vertx[i]) * (testy - verty[i]) / (verty[j] - verty[i]) + + vertx[i])) + c = !c; + } + return c; +} + +// TODO(syoyo): refactor function. +static bool exportGroupsToShape(shape_t *shape, const PrimGroup &prim_group, + const std::vector &tags, + const int material_id, const std::string &name, + bool triangulate, const std::vector &v, + std::string *warn) { + if (prim_group.IsEmpty()) { + return false; + } + + shape->name = name; + + // polygon + if (!prim_group.faceGroup.empty()) { + // Flatten vertices and indices + for (size_t i = 0; i < prim_group.faceGroup.size(); i++) { + const face_t &face = prim_group.faceGroup[i]; + + size_t npolys = face.vertex_indices.size(); + + if (npolys < 3) { + // Face must have 3+ vertices. + if (warn) { + (*warn) += "Degenerated face found\n."; + } + continue; + } + + if (triangulate) { + if (npolys == 4) { + vertex_index_t i0 = face.vertex_indices[0]; + vertex_index_t i1 = face.vertex_indices[1]; + vertex_index_t i2 = face.vertex_indices[2]; + vertex_index_t i3 = face.vertex_indices[3]; + + size_t vi0 = size_t(i0.v_idx); + size_t vi1 = size_t(i1.v_idx); + size_t vi2 = size_t(i2.v_idx); + size_t vi3 = size_t(i3.v_idx); + + if (((3 * vi0 + 2) >= v.size()) || ((3 * vi1 + 2) >= v.size()) || + ((3 * vi2 + 2) >= v.size()) || ((3 * vi3 + 2) >= v.size())) { + // Invalid triangle. + // FIXME(syoyo): Is it ok to simply skip this invalid triangle? + if (warn) { + (*warn) += "Face with invalid vertex index found.\n"; + } + continue; + } + + real_t v0x = v[vi0 * 3 + 0]; + real_t v0y = v[vi0 * 3 + 1]; + real_t v0z = v[vi0 * 3 + 2]; + real_t v1x = v[vi1 * 3 + 0]; + real_t v1y = v[vi1 * 3 + 1]; + real_t v1z = v[vi1 * 3 + 2]; + real_t v2x = v[vi2 * 3 + 0]; + real_t v2y = v[vi2 * 3 + 1]; + real_t v2z = v[vi2 * 3 + 2]; + real_t v3x = v[vi3 * 3 + 0]; + real_t v3y = v[vi3 * 3 + 1]; + real_t v3z = v[vi3 * 3 + 2]; + + // There are two candidates to split the quad into two triangles. + // + // Choose the shortest edge. + // TODO: Is it better to determine the edge to split by calculating + // the area of each triangle? + // + // +---+ + // |\ | + // | \ | + // | \| + // +---+ + // + // +---+ + // | /| + // | / | + // |/ | + // +---+ + + real_t e02x = v2x - v0x; + real_t e02y = v2y - v0y; + real_t e02z = v2z - v0z; + real_t e13x = v3x - v1x; + real_t e13y = v3y - v1y; + real_t e13z = v3z - v1z; + + real_t sqr02 = e02x * e02x + e02y * e02y + e02z * e02z; + real_t sqr13 = e13x * e13x + e13y * e13y + e13z * e13z; + + index_t idx0, idx1, idx2, idx3; + + idx0.vertex_index = i0.v_idx; + idx0.normal_index = i0.vn_idx; + idx0.texcoord_index = i0.vt_idx; + idx1.vertex_index = i1.v_idx; + idx1.normal_index = i1.vn_idx; + idx1.texcoord_index = i1.vt_idx; + idx2.vertex_index = i2.v_idx; + idx2.normal_index = i2.vn_idx; + idx2.texcoord_index = i2.vt_idx; + idx3.vertex_index = i3.v_idx; + idx3.normal_index = i3.vn_idx; + idx3.texcoord_index = i3.vt_idx; + + if (sqr02 < sqr13) { + // [0, 1, 2], [0, 2, 3] + shape->mesh.indices.push_back(idx0); + shape->mesh.indices.push_back(idx1); + shape->mesh.indices.push_back(idx2); + + shape->mesh.indices.push_back(idx0); + shape->mesh.indices.push_back(idx2); + shape->mesh.indices.push_back(idx3); + } else { + // [0, 1, 3], [1, 2, 3] + shape->mesh.indices.push_back(idx0); + shape->mesh.indices.push_back(idx1); + shape->mesh.indices.push_back(idx3); + + shape->mesh.indices.push_back(idx1); + shape->mesh.indices.push_back(idx2); + shape->mesh.indices.push_back(idx3); + } + + // Two triangle faces + shape->mesh.num_face_vertices.push_back(3); + shape->mesh.num_face_vertices.push_back(3); + + shape->mesh.material_ids.push_back(material_id); + shape->mesh.material_ids.push_back(material_id); + + shape->mesh.smoothing_group_ids.push_back(face.smoothing_group_id); + shape->mesh.smoothing_group_ids.push_back(face.smoothing_group_id); + + } else { + vertex_index_t i0 = face.vertex_indices[0]; + vertex_index_t i1(-1); + vertex_index_t i2 = face.vertex_indices[1]; + + // find the two axes to work in + size_t axes[2] = {1, 2}; + for (size_t k = 0; k < npolys; ++k) { + i0 = face.vertex_indices[(k + 0) % npolys]; + i1 = face.vertex_indices[(k + 1) % npolys]; + i2 = face.vertex_indices[(k + 2) % npolys]; + size_t vi0 = size_t(i0.v_idx); + size_t vi1 = size_t(i1.v_idx); + size_t vi2 = size_t(i2.v_idx); + + if (((3 * vi0 + 2) >= v.size()) || ((3 * vi1 + 2) >= v.size()) || + ((3 * vi2 + 2) >= v.size())) { + // Invalid triangle. + // FIXME(syoyo): Is it ok to simply skip this invalid triangle? + continue; + } + real_t v0x = v[vi0 * 3 + 0]; + real_t v0y = v[vi0 * 3 + 1]; + real_t v0z = v[vi0 * 3 + 2]; + real_t v1x = v[vi1 * 3 + 0]; + real_t v1y = v[vi1 * 3 + 1]; + real_t v1z = v[vi1 * 3 + 2]; + real_t v2x = v[vi2 * 3 + 0]; + real_t v2y = v[vi2 * 3 + 1]; + real_t v2z = v[vi2 * 3 + 2]; + real_t e0x = v1x - v0x; + real_t e0y = v1y - v0y; + real_t e0z = v1z - v0z; + real_t e1x = v2x - v1x; + real_t e1y = v2y - v1y; + real_t e1z = v2z - v1z; + real_t cx = std::fabs(e0y * e1z - e0z * e1y); + real_t cy = std::fabs(e0z * e1x - e0x * e1z); + real_t cz = std::fabs(e0x * e1y - e0y * e1x); + const real_t epsilon = std::numeric_limits::epsilon(); + // std::cout << "cx " << cx << ", cy " << cy << ", cz " << cz << + // "\n"; + if (cx > epsilon || cy > epsilon || cz > epsilon) { + // std::cout << "corner\n"; + // found a corner + if (cx > cy && cx > cz) { + // std::cout << "pattern0\n"; + } else { + // std::cout << "axes[0] = 0\n"; + axes[0] = 0; + if (cz > cx && cz > cy) { + // std::cout << "axes[1] = 1\n"; + axes[1] = 1; + } + } + break; + } + } + +#ifdef TINYOBJLOADER_USE_MAPBOX_EARCUT + using Point = std::array; + + // first polyline define the main polygon. + // following polylines define holes(not used in tinyobj). + std::vector > polygon; + + std::vector polyline; + + // Fill polygon data(facevarying vertices). + for (size_t k = 0; k < npolys; k++) { + i0 = face.vertex_indices[k]; + size_t vi0 = size_t(i0.v_idx); + + assert(((3 * vi0 + 2) < v.size())); + + real_t v0x = v[vi0 * 3 + axes[0]]; + real_t v0y = v[vi0 * 3 + axes[1]]; + + polyline.push_back({v0x, v0y}); + } + + polygon.push_back(polyline); + std::vector indices = mapbox::earcut(polygon); + // => result = 3 * faces, clockwise + + assert(indices.size() % 3 == 0); + + // Reconstruct vertex_index_t + for (size_t k = 0; k < indices.size() / 3; k++) { + { + index_t idx0, idx1, idx2; + idx0.vertex_index = face.vertex_indices[indices[3 * k + 0]].v_idx; + idx0.normal_index = + face.vertex_indices[indices[3 * k + 0]].vn_idx; + idx0.texcoord_index = + face.vertex_indices[indices[3 * k + 0]].vt_idx; + idx1.vertex_index = face.vertex_indices[indices[3 * k + 1]].v_idx; + idx1.normal_index = + face.vertex_indices[indices[3 * k + 1]].vn_idx; + idx1.texcoord_index = + face.vertex_indices[indices[3 * k + 1]].vt_idx; + idx2.vertex_index = face.vertex_indices[indices[3 * k + 2]].v_idx; + idx2.normal_index = + face.vertex_indices[indices[3 * k + 2]].vn_idx; + idx2.texcoord_index = + face.vertex_indices[indices[3 * k + 2]].vt_idx; + + shape->mesh.indices.push_back(idx0); + shape->mesh.indices.push_back(idx1); + shape->mesh.indices.push_back(idx2); + + shape->mesh.num_face_vertices.push_back(3); + shape->mesh.material_ids.push_back(material_id); + shape->mesh.smoothing_group_ids.push_back( + face.smoothing_group_id); + } + } + +#else // Built-in ear clipping triangulation + + + face_t remainingFace = face; // copy + size_t guess_vert = 0; + vertex_index_t ind[3]; + real_t vx[3]; + real_t vy[3]; + + // How many iterations can we do without decreasing the remaining + // vertices. + size_t remainingIterations = face.vertex_indices.size(); + size_t previousRemainingVertices = + remainingFace.vertex_indices.size(); + + while (remainingFace.vertex_indices.size() > 3 && + remainingIterations > 0) { + // std::cout << "remainingIterations " << remainingIterations << + // "\n"; + + npolys = remainingFace.vertex_indices.size(); + if (guess_vert >= npolys) { + guess_vert -= npolys; + } + + if (previousRemainingVertices != npolys) { + // The number of remaining vertices decreased. Reset counters. + previousRemainingVertices = npolys; + remainingIterations = npolys; + } else { + // We didn't consume a vertex on previous iteration, reduce the + // available iterations. + remainingIterations--; + } + + for (size_t k = 0; k < 3; k++) { + ind[k] = remainingFace.vertex_indices[(guess_vert + k) % npolys]; + size_t vi = size_t(ind[k].v_idx); + if (((vi * 3 + axes[0]) >= v.size()) || + ((vi * 3 + axes[1]) >= v.size())) { + // ??? + vx[k] = static_cast(0.0); + vy[k] = static_cast(0.0); + } else { + vx[k] = v[vi * 3 + axes[0]]; + vy[k] = v[vi * 3 + axes[1]]; + } + } + + // + // area is calculated per face + // + real_t e0x = vx[1] - vx[0]; + real_t e0y = vy[1] - vy[0]; + real_t e1x = vx[2] - vx[1]; + real_t e1y = vy[2] - vy[1]; + real_t cross = e0x * e1y - e0y * e1x; + // std::cout << "axes = " << axes[0] << ", " << axes[1] << "\n"; + // std::cout << "e0x, e0y, e1x, e1y " << e0x << ", " << e0y << ", " + // << e1x << ", " << e1y << "\n"; + + real_t area = (vx[0] * vy[1] - vy[0] * vx[1]) * static_cast(0.5); + // std::cout << "cross " << cross << ", area " << area << "\n"; + // if an internal angle + if (cross * area < static_cast(0.0)) { + // std::cout << "internal \n"; + guess_vert += 1; + // std::cout << "guess vert : " << guess_vert << "\n"; + continue; + } + + // check all other verts in case they are inside this triangle + bool overlap = false; + for (size_t otherVert = 3; otherVert < npolys; ++otherVert) { + size_t idx = (guess_vert + otherVert) % npolys; + + if (idx >= remainingFace.vertex_indices.size()) { + // std::cout << "???0\n"; + // ??? + continue; + } + + size_t ovi = size_t(remainingFace.vertex_indices[idx].v_idx); + + if (((ovi * 3 + axes[0]) >= v.size()) || + ((ovi * 3 + axes[1]) >= v.size())) { + // std::cout << "???1\n"; + // ??? + continue; + } + real_t tx = v[ovi * 3 + axes[0]]; + real_t ty = v[ovi * 3 + axes[1]]; + if (pnpoly(3, vx, vy, tx, ty)) { + // std::cout << "overlap\n"; + overlap = true; + break; + } + } + + if (overlap) { + // std::cout << "overlap2\n"; + guess_vert += 1; + continue; + } + + // this triangle is an ear + { + index_t idx0, idx1, idx2; + idx0.vertex_index = ind[0].v_idx; + idx0.normal_index = ind[0].vn_idx; + idx0.texcoord_index = ind[0].vt_idx; + idx1.vertex_index = ind[1].v_idx; + idx1.normal_index = ind[1].vn_idx; + idx1.texcoord_index = ind[1].vt_idx; + idx2.vertex_index = ind[2].v_idx; + idx2.normal_index = ind[2].vn_idx; + idx2.texcoord_index = ind[2].vt_idx; + + shape->mesh.indices.push_back(idx0); + shape->mesh.indices.push_back(idx1); + shape->mesh.indices.push_back(idx2); + + shape->mesh.num_face_vertices.push_back(3); + shape->mesh.material_ids.push_back(material_id); + shape->mesh.smoothing_group_ids.push_back( + face.smoothing_group_id); + } + + // remove v1 from the list + size_t removed_vert_index = (guess_vert + 1) % npolys; + while (removed_vert_index + 1 < npolys) { + remainingFace.vertex_indices[removed_vert_index] = + remainingFace.vertex_indices[removed_vert_index + 1]; + removed_vert_index += 1; + } + remainingFace.vertex_indices.pop_back(); + } + + // std::cout << "remainingFace.vi.size = " << + // remainingFace.vertex_indices.size() << "\n"; + if (remainingFace.vertex_indices.size() == 3) { + i0 = remainingFace.vertex_indices[0]; + i1 = remainingFace.vertex_indices[1]; + i2 = remainingFace.vertex_indices[2]; + { + index_t idx0, idx1, idx2; + idx0.vertex_index = i0.v_idx; + idx0.normal_index = i0.vn_idx; + idx0.texcoord_index = i0.vt_idx; + idx1.vertex_index = i1.v_idx; + idx1.normal_index = i1.vn_idx; + idx1.texcoord_index = i1.vt_idx; + idx2.vertex_index = i2.v_idx; + idx2.normal_index = i2.vn_idx; + idx2.texcoord_index = i2.vt_idx; + + shape->mesh.indices.push_back(idx0); + shape->mesh.indices.push_back(idx1); + shape->mesh.indices.push_back(idx2); + + shape->mesh.num_face_vertices.push_back(3); + shape->mesh.material_ids.push_back(material_id); + shape->mesh.smoothing_group_ids.push_back( + face.smoothing_group_id); + } + } +#endif + } // npolys + } else { + for (size_t k = 0; k < npolys; k++) { + index_t idx; + idx.vertex_index = face.vertex_indices[k].v_idx; + idx.normal_index = face.vertex_indices[k].vn_idx; + idx.texcoord_index = face.vertex_indices[k].vt_idx; + shape->mesh.indices.push_back(idx); + } + + shape->mesh.num_face_vertices.push_back( + static_cast(npolys)); + shape->mesh.material_ids.push_back(material_id); // per face + shape->mesh.smoothing_group_ids.push_back( + face.smoothing_group_id); // per face + } + } + + shape->mesh.tags = tags; + } + + // line + if (!prim_group.lineGroup.empty()) { + // Flatten indices + for (size_t i = 0; i < prim_group.lineGroup.size(); i++) { + for (size_t j = 0; j < prim_group.lineGroup[i].vertex_indices.size(); + j++) { + const vertex_index_t &vi = prim_group.lineGroup[i].vertex_indices[j]; + + index_t idx; + idx.vertex_index = vi.v_idx; + idx.normal_index = vi.vn_idx; + idx.texcoord_index = vi.vt_idx; + + shape->lines.indices.push_back(idx); + } + + shape->lines.num_line_vertices.push_back( + int(prim_group.lineGroup[i].vertex_indices.size())); + } + } + + // points + if (!prim_group.pointsGroup.empty()) { + // Flatten & convert indices + for (size_t i = 0; i < prim_group.pointsGroup.size(); i++) { + for (size_t j = 0; j < prim_group.pointsGroup[i].vertex_indices.size(); + j++) { + const vertex_index_t &vi = prim_group.pointsGroup[i].vertex_indices[j]; + + index_t idx; + idx.vertex_index = vi.v_idx; + idx.normal_index = vi.vn_idx; + idx.texcoord_index = vi.vt_idx; + + shape->points.indices.push_back(idx); + } + } + } + + return true; +} + +// Split a string with specified delimiter character and escape character. +// https://rosettacode.org/wiki/Tokenize_a_string_with_escaping#C.2B.2B +static void SplitString(const std::string &s, char delim, char escape, + std::vector &elems) { + std::string token; + + bool escaping = false; + for (size_t i = 0; i < s.size(); ++i) { + char ch = s[i]; + if (escaping) { + escaping = false; + } else if (ch == escape) { + escaping = true; + continue; + } else if (ch == delim) { + if (!token.empty()) { + elems.push_back(token); + } + token.clear(); + continue; + } + token += ch; + } + + elems.push_back(token); +} + +static std::string JoinPath(const std::string &dir, + const std::string &filename) { + if (dir.empty()) { + return filename; + } else { + // check '/' + char lastChar = *dir.rbegin(); + if (lastChar != '/') { + return dir + std::string("/") + filename; + } else { + return dir + filename; + } + } +} + +void LoadMtl(std::map *material_map, + std::vector *materials, std::istream *inStream, + std::string *warning, std::string *err) { + (void)err; + + // Create a default material anyway. + material_t material; + InitMaterial(&material); + + // Issue 43. `d` wins against `Tr` since `Tr` is not in the MTL specification. + bool has_d = false; + bool has_tr = false; + + // has_kd is used to set a default diffuse value when map_Kd is present + // and Kd is not. + bool has_kd = false; + + std::stringstream warn_ss; + + size_t line_no = 0; + std::string linebuf; + while (inStream->peek() != -1) { + safeGetline(*inStream, linebuf); + line_no++; + + // Trim trailing whitespace. + if (linebuf.size() > 0) { + linebuf = linebuf.substr(0, linebuf.find_last_not_of(" \t") + 1); + } + + // Trim newline '\r\n' or '\n' + if (linebuf.size() > 0) { + if (linebuf[linebuf.size() - 1] == '\n') + linebuf.erase(linebuf.size() - 1); + } + if (linebuf.size() > 0) { + if (linebuf[linebuf.size() - 1] == '\r') + linebuf.erase(linebuf.size() - 1); + } + + // Skip if empty line. + if (linebuf.empty()) { + continue; + } + + // Skip leading space. + const char *token = linebuf.c_str(); + token += strspn(token, " \t"); + + assert(token); + if (token[0] == '\0') continue; // empty line + + if (token[0] == '#') continue; // comment line + + // new mtl + if ((0 == strncmp(token, "newmtl", 6)) && IS_SPACE((token[6]))) { + // flush previous material. + if (!material.name.empty()) { + material_map->insert(std::pair( + material.name, static_cast(materials->size()))); + materials->push_back(material); + } + + // initial temporary material + InitMaterial(&material); + + has_d = false; + has_tr = false; + + // set new mtl name + token += 7; + { + std::stringstream sstr; + sstr << token; + material.name = sstr.str(); + } + continue; + } + + // ambient + if (token[0] == 'K' && token[1] == 'a' && IS_SPACE((token[2]))) { + token += 2; + real_t r, g, b; + parseReal3(&r, &g, &b, &token); + material.ambient[0] = r; + material.ambient[1] = g; + material.ambient[2] = b; + continue; + } + + // diffuse + if (token[0] == 'K' && token[1] == 'd' && IS_SPACE((token[2]))) { + token += 2; + real_t r, g, b; + parseReal3(&r, &g, &b, &token); + material.diffuse[0] = r; + material.diffuse[1] = g; + material.diffuse[2] = b; + has_kd = true; + continue; + } + + // specular + if (token[0] == 'K' && token[1] == 's' && IS_SPACE((token[2]))) { + token += 2; + real_t r, g, b; + parseReal3(&r, &g, &b, &token); + material.specular[0] = r; + material.specular[1] = g; + material.specular[2] = b; + continue; + } + + // transmittance + if ((token[0] == 'K' && token[1] == 't' && IS_SPACE((token[2]))) || + (token[0] == 'T' && token[1] == 'f' && IS_SPACE((token[2])))) { + token += 2; + real_t r, g, b; + parseReal3(&r, &g, &b, &token); + material.transmittance[0] = r; + material.transmittance[1] = g; + material.transmittance[2] = b; + continue; + } + + // ior(index of refraction) + if (token[0] == 'N' && token[1] == 'i' && IS_SPACE((token[2]))) { + token += 2; + material.ior = parseReal(&token); + continue; + } + + // emission + if (token[0] == 'K' && token[1] == 'e' && IS_SPACE(token[2])) { + token += 2; + real_t r, g, b; + parseReal3(&r, &g, &b, &token); + material.emission[0] = r; + material.emission[1] = g; + material.emission[2] = b; + continue; + } + + // shininess + if (token[0] == 'N' && token[1] == 's' && IS_SPACE(token[2])) { + token += 2; + material.shininess = parseReal(&token); + continue; + } + + // illum model + if (0 == strncmp(token, "illum", 5) && IS_SPACE(token[5])) { + token += 6; + material.illum = parseInt(&token); + continue; + } + + // dissolve + if ((token[0] == 'd' && IS_SPACE(token[1]))) { + token += 1; + material.dissolve = parseReal(&token); + + if (has_tr) { + warn_ss << "Both `d` and `Tr` parameters defined for \"" + << material.name + << "\". Use the value of `d` for dissolve (line " << line_no + << " in .mtl.)\n"; + } + has_d = true; + continue; + } + if (token[0] == 'T' && token[1] == 'r' && IS_SPACE(token[2])) { + token += 2; + if (has_d) { + // `d` wins. Ignore `Tr` value. + warn_ss << "Both `d` and `Tr` parameters defined for \"" + << material.name + << "\". Use the value of `d` for dissolve (line " << line_no + << " in .mtl.)\n"; + } else { + // We invert value of Tr(assume Tr is in range [0, 1]) + // NOTE: Interpretation of Tr is application(exporter) dependent. For + // some application(e.g. 3ds max obj exporter), Tr = d(Issue 43) + material.dissolve = static_cast(1.0) - parseReal(&token); + } + has_tr = true; + continue; + } + + // PBR: roughness + if (token[0] == 'P' && token[1] == 'r' && IS_SPACE(token[2])) { + token += 2; + material.roughness = parseReal(&token); + continue; + } + + // PBR: metallic + if (token[0] == 'P' && token[1] == 'm' && IS_SPACE(token[2])) { + token += 2; + material.metallic = parseReal(&token); + continue; + } + + // PBR: sheen + if (token[0] == 'P' && token[1] == 's' && IS_SPACE(token[2])) { + token += 2; + material.sheen = parseReal(&token); + continue; + } + + // PBR: clearcoat thickness + if (token[0] == 'P' && token[1] == 'c' && IS_SPACE(token[2])) { + token += 2; + material.clearcoat_thickness = parseReal(&token); + continue; + } + + // PBR: clearcoat roughness + if ((0 == strncmp(token, "Pcr", 3)) && IS_SPACE(token[3])) { + token += 4; + material.clearcoat_roughness = parseReal(&token); + continue; + } + + // PBR: anisotropy + if ((0 == strncmp(token, "aniso", 5)) && IS_SPACE(token[5])) { + token += 6; + material.anisotropy = parseReal(&token); + continue; + } + + // PBR: anisotropy rotation + if ((0 == strncmp(token, "anisor", 6)) && IS_SPACE(token[6])) { + token += 7; + material.anisotropy_rotation = parseReal(&token); + continue; + } + + // ambient texture + if ((0 == strncmp(token, "map_Ka", 6)) && IS_SPACE(token[6])) { + token += 7; + ParseTextureNameAndOption(&(material.ambient_texname), + &(material.ambient_texopt), token); + continue; + } + + // diffuse texture + if ((0 == strncmp(token, "map_Kd", 6)) && IS_SPACE(token[6])) { + token += 7; + ParseTextureNameAndOption(&(material.diffuse_texname), + &(material.diffuse_texopt), token); + + // Set a decent diffuse default value if a diffuse texture is specified + // without a matching Kd value. + if (!has_kd) { + material.diffuse[0] = static_cast(0.6); + material.diffuse[1] = static_cast(0.6); + material.diffuse[2] = static_cast(0.6); + } + + continue; + } + + // specular texture + if ((0 == strncmp(token, "map_Ks", 6)) && IS_SPACE(token[6])) { + token += 7; + ParseTextureNameAndOption(&(material.specular_texname), + &(material.specular_texopt), token); + continue; + } + + // specular highlight texture + if ((0 == strncmp(token, "map_Ns", 6)) && IS_SPACE(token[6])) { + token += 7; + ParseTextureNameAndOption(&(material.specular_highlight_texname), + &(material.specular_highlight_texopt), token); + continue; + } + + // bump texture + if ((0 == strncmp(token, "map_bump", 8)) && IS_SPACE(token[8])) { + token += 9; + ParseTextureNameAndOption(&(material.bump_texname), + &(material.bump_texopt), token); + continue; + } + + // bump texture + if ((0 == strncmp(token, "map_Bump", 8)) && IS_SPACE(token[8])) { + token += 9; + ParseTextureNameAndOption(&(material.bump_texname), + &(material.bump_texopt), token); + continue; + } + + // bump texture + if ((0 == strncmp(token, "bump", 4)) && IS_SPACE(token[4])) { + token += 5; + ParseTextureNameAndOption(&(material.bump_texname), + &(material.bump_texopt), token); + continue; + } + + // alpha texture + if ((0 == strncmp(token, "map_d", 5)) && IS_SPACE(token[5])) { + token += 6; + material.alpha_texname = token; + ParseTextureNameAndOption(&(material.alpha_texname), + &(material.alpha_texopt), token); + continue; + } + + // displacement texture + if ((0 == strncmp(token, "disp", 4)) && IS_SPACE(token[4])) { + token += 5; + ParseTextureNameAndOption(&(material.displacement_texname), + &(material.displacement_texopt), token); + continue; + } + + // reflection map + if ((0 == strncmp(token, "refl", 4)) && IS_SPACE(token[4])) { + token += 5; + ParseTextureNameAndOption(&(material.reflection_texname), + &(material.reflection_texopt), token); + continue; + } + + // PBR: roughness texture + if ((0 == strncmp(token, "map_Pr", 6)) && IS_SPACE(token[6])) { + token += 7; + ParseTextureNameAndOption(&(material.roughness_texname), + &(material.roughness_texopt), token); + continue; + } + + // PBR: metallic texture + if ((0 == strncmp(token, "map_Pm", 6)) && IS_SPACE(token[6])) { + token += 7; + ParseTextureNameAndOption(&(material.metallic_texname), + &(material.metallic_texopt), token); + continue; + } + + // PBR: sheen texture + if ((0 == strncmp(token, "map_Ps", 6)) && IS_SPACE(token[6])) { + token += 7; + ParseTextureNameAndOption(&(material.sheen_texname), + &(material.sheen_texopt), token); + continue; + } + + // PBR: emissive texture + if ((0 == strncmp(token, "map_Ke", 6)) && IS_SPACE(token[6])) { + token += 7; + ParseTextureNameAndOption(&(material.emissive_texname), + &(material.emissive_texopt), token); + continue; + } + + // PBR: normal map texture + if ((0 == strncmp(token, "norm", 4)) && IS_SPACE(token[4])) { + token += 5; + ParseTextureNameAndOption(&(material.normal_texname), + &(material.normal_texopt), token); + continue; + } + + // unknown parameter + const char *_space = strchr(token, ' '); + if (!_space) { + _space = strchr(token, '\t'); + } + if (_space) { + std::ptrdiff_t len = _space - token; + std::string key(token, static_cast(len)); + std::string value = _space + 1; + material.unknown_parameter.insert( + std::pair(key, value)); + } + } + // flush last material. + material_map->insert(std::pair( + material.name, static_cast(materials->size()))); + materials->push_back(material); + + if (warning) { + (*warning) = warn_ss.str(); + } +} + +bool MaterialFileReader::operator()(const std::string &matId, + std::vector *materials, + std::map *matMap, + std::string *warn, std::string *err) { + if (!m_mtlBaseDir.empty()) { +#ifdef _WIN32 + char sep = ';'; +#else + char sep = ':'; +#endif + + // https://stackoverflow.com/questions/5167625/splitting-a-c-stdstring-using-tokens-e-g + std::vector paths; + std::istringstream f(m_mtlBaseDir); + + std::string s; + while (getline(f, s, sep)) { + paths.push_back(s); + } + + for (size_t i = 0; i < paths.size(); i++) { + std::string filepath = JoinPath(paths[i], matId); + + std::ifstream matIStream(filepath.c_str()); + if (matIStream) { + LoadMtl(matMap, materials, &matIStream, warn, err); + + return true; + } + } + + std::stringstream ss; + ss << "Material file [ " << matId + << " ] not found in a path : " << m_mtlBaseDir << "\n"; + if (warn) { + (*warn) += ss.str(); + } + return false; + + } else { + std::string filepath = matId; + std::ifstream matIStream(filepath.c_str()); + if (matIStream) { + LoadMtl(matMap, materials, &matIStream, warn, err); + + return true; + } + + std::stringstream ss; + ss << "Material file [ " << filepath + << " ] not found in a path : " << m_mtlBaseDir << "\n"; + if (warn) { + (*warn) += ss.str(); + } + + return false; + } +} + +bool MaterialStreamReader::operator()(const std::string &matId, + std::vector *materials, + std::map *matMap, + std::string *warn, std::string *err) { + (void)err; + (void)matId; + if (!m_inStream) { + std::stringstream ss; + ss << "Material stream in error state. \n"; + if (warn) { + (*warn) += ss.str(); + } + return false; + } + + LoadMtl(matMap, materials, &m_inStream, warn, err); + + return true; +} + +bool LoadObj(attrib_t *attrib, std::vector *shapes, + std::vector *materials, std::string *warn, + std::string *err, const char *filename, const char *mtl_basedir, + bool triangulate, bool default_vcols_fallback) { + attrib->vertices.clear(); + attrib->normals.clear(); + attrib->texcoords.clear(); + attrib->colors.clear(); + shapes->clear(); + + std::stringstream errss; + + std::ifstream ifs(filename); + if (!ifs) { + errss << "Cannot open file [" << filename << "]\n"; + if (err) { + (*err) = errss.str(); + } + return false; + } + + std::string baseDir = mtl_basedir ? mtl_basedir : ""; + if (!baseDir.empty()) { +#ifndef _WIN32 + const char dirsep = '/'; +#else + const char dirsep = '\\'; +#endif + if (baseDir[baseDir.length() - 1] != dirsep) baseDir += dirsep; + } + MaterialFileReader matFileReader(baseDir); + + return LoadObj(attrib, shapes, materials, warn, err, &ifs, &matFileReader, + triangulate, default_vcols_fallback); +} + +bool LoadObj(attrib_t *attrib, std::vector *shapes, + std::vector *materials, std::string *warn, + std::string *err, std::istream *inStream, + MaterialReader *readMatFn /*= NULL*/, bool triangulate, + bool default_vcols_fallback) { + std::stringstream errss; + + std::vector v; + std::vector vn; + std::vector vt; + std::vector vc; + std::vector vw; + std::vector tags; + PrimGroup prim_group; + std::string name; + + // material + std::map material_map; + int material = -1; + + // smoothing group id + unsigned int current_smoothing_id = + 0; // Initial value. 0 means no smoothing. + + int greatest_v_idx = -1; + int greatest_vn_idx = -1; + int greatest_vt_idx = -1; + + shape_t shape; + + bool found_all_colors = true; + + size_t line_num = 0; + std::string linebuf; + while (inStream->peek() != -1) { + safeGetline(*inStream, linebuf); + + line_num++; + + // Trim newline '\r\n' or '\n' + if (linebuf.size() > 0) { + if (linebuf[linebuf.size() - 1] == '\n') + linebuf.erase(linebuf.size() - 1); + } + if (linebuf.size() > 0) { + if (linebuf[linebuf.size() - 1] == '\r') + linebuf.erase(linebuf.size() - 1); + } + + // Skip if empty line. + if (linebuf.empty()) { + continue; + } + + // Skip leading space. + const char *token = linebuf.c_str(); + token += strspn(token, " \t"); + + assert(token); + if (token[0] == '\0') continue; // empty line + + if (token[0] == '#') continue; // comment line + + // vertex + if (token[0] == 'v' && IS_SPACE((token[1]))) { + token += 2; + real_t x, y, z; + real_t r, g, b; + + found_all_colors &= parseVertexWithColor(&x, &y, &z, &r, &g, &b, &token); + + v.push_back(x); + v.push_back(y); + v.push_back(z); + + if (found_all_colors || default_vcols_fallback) { + vc.push_back(r); + vc.push_back(g); + vc.push_back(b); + } + + continue; + } + + // normal + if (token[0] == 'v' && token[1] == 'n' && IS_SPACE((token[2]))) { + token += 3; + real_t x, y, z; + parseReal3(&x, &y, &z, &token); + vn.push_back(x); + vn.push_back(y); + vn.push_back(z); + continue; + } + + // texcoord + if (token[0] == 'v' && token[1] == 't' && IS_SPACE((token[2]))) { + token += 3; + real_t x, y; + parseReal2(&x, &y, &token); + vt.push_back(x); + vt.push_back(y); + continue; + } + + // skin weight. tinyobj extension + if (token[0] == 'v' && token[1] == 'w' && IS_SPACE((token[2]))) { + token += 3; + + // vw ... + // example: + // vw 0 0 0.25 1 0.25 2 0.5 + + // TODO(syoyo): Add syntax check + int vid = 0; + vid = parseInt(&token); + + skin_weight_t sw; + + sw.vertex_id = vid; + + while (!IS_NEW_LINE(token[0])) { + real_t j, w; + // joint_id should not be negative, weight may be negative + // TODO(syoyo): # of elements check + parseReal2(&j, &w, &token, -1.0); + + if (j < static_cast(0)) { + if (err) { + std::stringstream ss; + ss << "Failed parse `vw' line. joint_id is negative. " + "line " + << line_num << ".)\n"; + (*err) += ss.str(); + } + return false; + } + + joint_and_weight_t jw; + + jw.joint_id = int(j); + jw.weight = w; + + sw.weightValues.push_back(jw); + + size_t n = strspn(token, " \t\r"); + token += n; + } + + vw.push_back(sw); + } + + // line + if (token[0] == 'l' && IS_SPACE((token[1]))) { + token += 2; + + __line_t line; + + while (!IS_NEW_LINE(token[0])) { + vertex_index_t vi; + if (!parseTriple(&token, static_cast(v.size() / 3), + static_cast(vn.size() / 3), + static_cast(vt.size() / 2), &vi)) { + if (err) { + std::stringstream ss; + ss << "Failed parse `l' line(e.g. zero value for vertex index. " + "line " + << line_num << ".)\n"; + (*err) += ss.str(); + } + return false; + } + + line.vertex_indices.push_back(vi); + + size_t n = strspn(token, " \t\r"); + token += n; + } + + prim_group.lineGroup.push_back(line); + + continue; + } + + // points + if (token[0] == 'p' && IS_SPACE((token[1]))) { + token += 2; + + __points_t pts; + + while (!IS_NEW_LINE(token[0])) { + vertex_index_t vi; + if (!parseTriple(&token, static_cast(v.size() / 3), + static_cast(vn.size() / 3), + static_cast(vt.size() / 2), &vi)) { + if (err) { + std::stringstream ss; + ss << "Failed parse `p' line(e.g. zero value for vertex index. " + "line " + << line_num << ".)\n"; + (*err) += ss.str(); + } + return false; + } + + pts.vertex_indices.push_back(vi); + + size_t n = strspn(token, " \t\r"); + token += n; + } + + prim_group.pointsGroup.push_back(pts); + + continue; + } + + // face + if (token[0] == 'f' && IS_SPACE((token[1]))) { + token += 2; + token += strspn(token, " \t"); + + face_t face; + + face.smoothing_group_id = current_smoothing_id; + face.vertex_indices.reserve(3); + + while (!IS_NEW_LINE(token[0])) { + vertex_index_t vi; + if (!parseTriple(&token, static_cast(v.size() / 3), + static_cast(vn.size() / 3), + static_cast(vt.size() / 2), &vi)) { + if (err) { + std::stringstream ss; + ss << "Failed parse `f' line(e.g. zero value for face index. line " + << line_num << ".)\n"; + (*err) += ss.str(); + } + return false; + } + + greatest_v_idx = greatest_v_idx > vi.v_idx ? greatest_v_idx : vi.v_idx; + greatest_vn_idx = + greatest_vn_idx > vi.vn_idx ? greatest_vn_idx : vi.vn_idx; + greatest_vt_idx = + greatest_vt_idx > vi.vt_idx ? greatest_vt_idx : vi.vt_idx; + + face.vertex_indices.push_back(vi); + size_t n = strspn(token, " \t\r"); + token += n; + } + + // replace with emplace_back + std::move on C++11 + prim_group.faceGroup.push_back(face); + + continue; + } + + // use mtl + if ((0 == strncmp(token, "usemtl", 6))) { + token += 6; + std::string namebuf = parseString(&token); + + int newMaterialId = -1; + std::map::const_iterator it = + material_map.find(namebuf); + if (it != material_map.end()) { + newMaterialId = it->second; + } else { + // { error!! material not found } + if (warn) { + (*warn) += "material [ '" + namebuf + "' ] not found in .mtl\n"; + } + } + + if (newMaterialId != material) { + // Create per-face material. Thus we don't add `shape` to `shapes` at + // this time. + // just clear `faceGroup` after `exportGroupsToShape()` call. + exportGroupsToShape(&shape, prim_group, tags, material, name, + triangulate, v, warn); + prim_group.faceGroup.clear(); + material = newMaterialId; + } + + continue; + } + + // load mtl + if ((0 == strncmp(token, "mtllib", 6)) && IS_SPACE((token[6]))) { + if (readMatFn) { + token += 7; + + std::vector filenames; + SplitString(std::string(token), ' ', '\\', filenames); + + if (filenames.empty()) { + if (warn) { + std::stringstream ss; + ss << "Looks like empty filename for mtllib. Use default " + "material (line " + << line_num << ".)\n"; + + (*warn) += ss.str(); + } + } else { + bool found = false; + for (size_t s = 0; s < filenames.size(); s++) { + std::string warn_mtl; + std::string err_mtl; + bool ok = (*readMatFn)(filenames[s].c_str(), materials, + &material_map, &warn_mtl, &err_mtl); + if (warn && (!warn_mtl.empty())) { + (*warn) += warn_mtl; + } + + if (err && (!err_mtl.empty())) { + (*err) += err_mtl; + } + + if (ok) { + found = true; + break; + } + } + + if (!found) { + if (warn) { + (*warn) += + "Failed to load material file(s). Use default " + "material.\n"; + } + } + } + } + + continue; + } + + // group name + if (token[0] == 'g' && IS_SPACE((token[1]))) { + // flush previous face group. + bool ret = exportGroupsToShape(&shape, prim_group, tags, material, name, + triangulate, v, warn); + (void)ret; // return value not used. + + if (shape.mesh.indices.size() > 0) { + shapes->push_back(shape); + } + + shape = shape_t(); + + // material = -1; + prim_group.clear(); + + std::vector names; + + while (!IS_NEW_LINE(token[0])) { + std::string str = parseString(&token); + names.push_back(str); + token += strspn(token, " \t\r"); // skip tag + } + + // names[0] must be 'g' + + if (names.size() < 2) { + // 'g' with empty names + if (warn) { + std::stringstream ss; + ss << "Empty group name. line: " << line_num << "\n"; + (*warn) += ss.str(); + name = ""; + } + } else { + std::stringstream ss; + ss << names[1]; + + // tinyobjloader does not support multiple groups for a primitive. + // Currently we concatinate multiple group names with a space to get + // single group name. + + for (size_t i = 2; i < names.size(); i++) { + ss << " " << names[i]; + } + + name = ss.str(); + } + + continue; + } + + // object name + if (token[0] == 'o' && IS_SPACE((token[1]))) { + // flush previous face group. + bool ret = exportGroupsToShape(&shape, prim_group, tags, material, name, + triangulate, v, warn); + (void)ret; // return value not used. + + if (shape.mesh.indices.size() > 0 || shape.lines.indices.size() > 0 || + shape.points.indices.size() > 0) { + shapes->push_back(shape); + } + + // material = -1; + prim_group.clear(); + shape = shape_t(); + + // @todo { multiple object name? } + token += 2; + std::stringstream ss; + ss << token; + name = ss.str(); + + continue; + } + + if (token[0] == 't' && IS_SPACE(token[1])) { + const int max_tag_nums = 8192; // FIXME(syoyo): Parameterize. + tag_t tag; + + token += 2; + + tag.name = parseString(&token); + + tag_sizes ts = parseTagTriple(&token); + + if (ts.num_ints < 0) { + ts.num_ints = 0; + } + if (ts.num_ints > max_tag_nums) { + ts.num_ints = max_tag_nums; + } + + if (ts.num_reals < 0) { + ts.num_reals = 0; + } + if (ts.num_reals > max_tag_nums) { + ts.num_reals = max_tag_nums; + } + + if (ts.num_strings < 0) { + ts.num_strings = 0; + } + if (ts.num_strings > max_tag_nums) { + ts.num_strings = max_tag_nums; + } + + tag.intValues.resize(static_cast(ts.num_ints)); + + for (size_t i = 0; i < static_cast(ts.num_ints); ++i) { + tag.intValues[i] = parseInt(&token); + } + + tag.floatValues.resize(static_cast(ts.num_reals)); + for (size_t i = 0; i < static_cast(ts.num_reals); ++i) { + tag.floatValues[i] = parseReal(&token); + } + + tag.stringValues.resize(static_cast(ts.num_strings)); + for (size_t i = 0; i < static_cast(ts.num_strings); ++i) { + tag.stringValues[i] = parseString(&token); + } + + tags.push_back(tag); + + continue; + } + + if (token[0] == 's' && IS_SPACE(token[1])) { + // smoothing group id + token += 2; + + // skip space. + token += strspn(token, " \t"); // skip space + + if (token[0] == '\0') { + continue; + } + + if (token[0] == '\r' || token[1] == '\n') { + continue; + } + + if (strlen(token) >= 3 && token[0] == 'o' && token[1] == 'f' && + token[2] == 'f') { + current_smoothing_id = 0; + } else { + // assume number + int smGroupId = parseInt(&token); + if (smGroupId < 0) { + // parse error. force set to 0. + // FIXME(syoyo): Report warning. + current_smoothing_id = 0; + } else { + current_smoothing_id = static_cast(smGroupId); + } + } + + continue; + } // smoothing group id + + // Ignore unknown command. + } + + // not all vertices have colors, no default colors desired? -> clear colors + if (!found_all_colors && !default_vcols_fallback) { + vc.clear(); + } + + if (greatest_v_idx >= static_cast(v.size() / 3)) { + if (warn) { + std::stringstream ss; + ss << "Vertex indices out of bounds (line " << line_num << ".)\n\n"; + (*warn) += ss.str(); + } + } + if (greatest_vn_idx >= static_cast(vn.size() / 3)) { + if (warn) { + std::stringstream ss; + ss << "Vertex normal indices out of bounds (line " << line_num << ".)\n\n"; + (*warn) += ss.str(); + } + } + if (greatest_vt_idx >= static_cast(vt.size() / 2)) { + if (warn) { + std::stringstream ss; + ss << "Vertex texcoord indices out of bounds (line " << line_num << ".)\n\n"; + (*warn) += ss.str(); + } + } + + bool ret = exportGroupsToShape(&shape, prim_group, tags, material, name, + triangulate, v, warn); + // exportGroupsToShape return false when `usemtl` is called in the last + // line. + // we also add `shape` to `shapes` when `shape.mesh` has already some + // faces(indices) + if (ret || shape.mesh.indices + .size()) { // FIXME(syoyo): Support other prims(e.g. lines) + shapes->push_back(shape); + } + prim_group.clear(); // for safety + + if (err) { + (*err) += errss.str(); + } + + attrib->vertices.swap(v); + attrib->vertex_weights.swap(v); + attrib->normals.swap(vn); + attrib->texcoords.swap(vt); + attrib->texcoord_ws.swap(vt); + attrib->colors.swap(vc); + attrib->skin_weights.swap(vw); + + return true; +} + +bool LoadObjWithCallback(std::istream &inStream, const callback_t &callback, + void *user_data /*= NULL*/, + MaterialReader *readMatFn /*= NULL*/, + std::string *warn, /* = NULL*/ + std::string *err /*= NULL*/) { + std::stringstream errss; + + // material + std::map material_map; + int material_id = -1; // -1 = invalid + + std::vector indices; + std::vector materials; + std::vector names; + names.reserve(2); + std::vector names_out; + + std::string linebuf; + while (inStream.peek() != -1) { + safeGetline(inStream, linebuf); + + // Trim newline '\r\n' or '\n' + if (linebuf.size() > 0) { + if (linebuf[linebuf.size() - 1] == '\n') + linebuf.erase(linebuf.size() - 1); + } + if (linebuf.size() > 0) { + if (linebuf[linebuf.size() - 1] == '\r') + linebuf.erase(linebuf.size() - 1); + } + + // Skip if empty line. + if (linebuf.empty()) { + continue; + } + + // Skip leading space. + const char *token = linebuf.c_str(); + token += strspn(token, " \t"); + + assert(token); + if (token[0] == '\0') continue; // empty line + + if (token[0] == '#') continue; // comment line + + // vertex + if (token[0] == 'v' && IS_SPACE((token[1]))) { + token += 2; + // TODO(syoyo): Support parsing vertex color extension. + real_t x, y, z, w; // w is optional. default = 1.0 + parseV(&x, &y, &z, &w, &token); + if (callback.vertex_cb) { + callback.vertex_cb(user_data, x, y, z, w); + } + continue; + } + + // normal + if (token[0] == 'v' && token[1] == 'n' && IS_SPACE((token[2]))) { + token += 3; + real_t x, y, z; + parseReal3(&x, &y, &z, &token); + if (callback.normal_cb) { + callback.normal_cb(user_data, x, y, z); + } + continue; + } + + // texcoord + if (token[0] == 'v' && token[1] == 't' && IS_SPACE((token[2]))) { + token += 3; + real_t x, y, z; // y and z are optional. default = 0.0 + parseReal3(&x, &y, &z, &token); + if (callback.texcoord_cb) { + callback.texcoord_cb(user_data, x, y, z); + } + continue; + } + + // face + if (token[0] == 'f' && IS_SPACE((token[1]))) { + token += 2; + token += strspn(token, " \t"); + + indices.clear(); + while (!IS_NEW_LINE(token[0])) { + vertex_index_t vi = parseRawTriple(&token); + + index_t idx; + idx.vertex_index = vi.v_idx; + idx.normal_index = vi.vn_idx; + idx.texcoord_index = vi.vt_idx; + + indices.push_back(idx); + size_t n = strspn(token, " \t\r"); + token += n; + } + + if (callback.index_cb && indices.size() > 0) { + callback.index_cb(user_data, &indices.at(0), + static_cast(indices.size())); + } + + continue; + } + + // use mtl + if ((0 == strncmp(token, "usemtl", 6)) && IS_SPACE((token[6]))) { + token += 7; + std::stringstream ss; + ss << token; + std::string namebuf = ss.str(); + + int newMaterialId = -1; + std::map::const_iterator it = + material_map.find(namebuf); + if (it != material_map.end()) { + newMaterialId = it->second; + } else { + // { warn!! material not found } + if (warn && (!callback.usemtl_cb)) { + (*warn) += "material [ " + namebuf + " ] not found in .mtl\n"; + } + } + + if (newMaterialId != material_id) { + material_id = newMaterialId; + } + + if (callback.usemtl_cb) { + callback.usemtl_cb(user_data, namebuf.c_str(), material_id); + } + + continue; + } + + // load mtl + if ((0 == strncmp(token, "mtllib", 6)) && IS_SPACE((token[6]))) { + if (readMatFn) { + token += 7; + + std::vector filenames; + SplitString(std::string(token), ' ', '\\', filenames); + + if (filenames.empty()) { + if (warn) { + (*warn) += + "Looks like empty filename for mtllib. Use default " + "material. \n"; + } + } else { + bool found = false; + for (size_t s = 0; s < filenames.size(); s++) { + std::string warn_mtl; + std::string err_mtl; + bool ok = (*readMatFn)(filenames[s].c_str(), &materials, + &material_map, &warn_mtl, &err_mtl); + + if (warn && (!warn_mtl.empty())) { + (*warn) += warn_mtl; // This should be warn message. + } + + if (err && (!err_mtl.empty())) { + (*err) += err_mtl; + } + + if (ok) { + found = true; + break; + } + } + + if (!found) { + if (warn) { + (*warn) += + "Failed to load material file(s). Use default " + "material.\n"; + } + } else { + if (callback.mtllib_cb) { + callback.mtllib_cb(user_data, &materials.at(0), + static_cast(materials.size())); + } + } + } + } + + continue; + } + + // group name + if (token[0] == 'g' && IS_SPACE((token[1]))) { + names.clear(); + + while (!IS_NEW_LINE(token[0])) { + std::string str = parseString(&token); + names.push_back(str); + token += strspn(token, " \t\r"); // skip tag + } + + assert(names.size() > 0); + + if (callback.group_cb) { + if (names.size() > 1) { + // create const char* array. + names_out.resize(names.size() - 1); + for (size_t j = 0; j < names_out.size(); j++) { + names_out[j] = names[j + 1].c_str(); + } + callback.group_cb(user_data, &names_out.at(0), + static_cast(names_out.size())); + + } else { + callback.group_cb(user_data, NULL, 0); + } + } + + continue; + } + + // object name + if (token[0] == 'o' && IS_SPACE((token[1]))) { + // @todo { multiple object name? } + token += 2; + + std::stringstream ss; + ss << token; + std::string object_name = ss.str(); + + if (callback.object_cb) { + callback.object_cb(user_data, object_name.c_str()); + } + + continue; + } + +#if 0 // @todo + if (token[0] == 't' && IS_SPACE(token[1])) { + tag_t tag; + + token += 2; + std::stringstream ss; + ss << token; + tag.name = ss.str(); + + token += tag.name.size() + 1; + + tag_sizes ts = parseTagTriple(&token); + + tag.intValues.resize(static_cast(ts.num_ints)); + + for (size_t i = 0; i < static_cast(ts.num_ints); ++i) { + tag.intValues[i] = atoi(token); + token += strcspn(token, "/ \t\r") + 1; + } + + tag.floatValues.resize(static_cast(ts.num_reals)); + for (size_t i = 0; i < static_cast(ts.num_reals); ++i) { + tag.floatValues[i] = parseReal(&token); + token += strcspn(token, "/ \t\r") + 1; + } + + tag.stringValues.resize(static_cast(ts.num_strings)); + for (size_t i = 0; i < static_cast(ts.num_strings); ++i) { + std::stringstream ss; + ss << token; + tag.stringValues[i] = ss.str(); + token += tag.stringValues[i].size() + 1; + } + + tags.push_back(tag); + } +#endif + + // Ignore unknown command. + } + + if (err) { + (*err) += errss.str(); + } + + return true; +} + +bool ObjReader::ParseFromFile(const std::string &filename, + const ObjReaderConfig &config) { + std::string mtl_search_path; + + if (config.mtl_search_path.empty()) { + // + // split at last '/'(for unixish system) or '\\'(for windows) to get + // the base directory of .obj file + // + size_t pos = filename.find_last_of("/\\"); + if (pos != std::string::npos) { + mtl_search_path = filename.substr(0, pos); + } + } else { + mtl_search_path = config.mtl_search_path; + } + + valid_ = LoadObj(&attrib_, &shapes_, &materials_, &warning_, &error_, + filename.c_str(), mtl_search_path.c_str(), + config.triangulate, config.vertex_color); + + return valid_; +} + +bool ObjReader::ParseFromString(const std::string &obj_text, + const std::string &mtl_text, + const ObjReaderConfig &config) { + std::stringbuf obj_buf(obj_text); + std::stringbuf mtl_buf(mtl_text); + + std::istream obj_ifs(&obj_buf); + std::istream mtl_ifs(&mtl_buf); + + MaterialStreamReader mtl_ss(mtl_ifs); + + valid_ = LoadObj(&attrib_, &shapes_, &materials_, &warning_, &error_, + &obj_ifs, &mtl_ss, config.triangulate, config.vertex_color); + + return valid_; +} + +#ifdef __clang__ +#pragma clang diagnostic pop +#endif +} // namespace tinyobj + +#endif diff --git a/src/utilities.h b/src/utilities.h index abb4f27c..315f9983 100644 --- a/src/utilities.h +++ b/src/utilities.h @@ -12,7 +12,7 @@ #define PI 3.1415926535897932384626422832795028841971f #define TWO_PI 6.2831853071795864769252867665590057683943f #define SQRT_OF_ONE_THIRD 0.5773502691896257645091487805019574556476f -#define EPSILON 0.00001f +#define EPSILON 0.001f namespace utilityCore { extern float clamp(float f, float min, float max);