This project is a glTF 2.0 sample viewer using Vulkan ray tracing. It follows the ray tracing tutorial and combines all chapters into a single example.
The lighting equation is based on:
- glTF PBR reference implementation from Khronos.
- Disney PBR
The rendering pipeline can be switched from:
- Ray Tracing Pipeline: RayGen, Closest-Hit, Miss, Any-Hit model
- Ray Query: Compute shader using Ray Queries
- Load glTF 2.0 files ascii and binary using tiny glTF
- Support for full node hierarchy
- Full implementation of metallic-roughness and specular-glossiness
- IBL lighting using importance light sampling
- Alpha blend and cut-out
- Texture transforms and samplers
- Normal : create geometric normal when not present
- Texture coords : only set 0, project cube map when text coords are missing.
- Tangents : generate tangents and bitangent when missing.
- Color : default (1,1,1,1)
- KHR_lights_punctual (some support)
- KHR_materials_pbrSpecularGlossiness
- KHR_materials_clearcoat
- KHR_materials_unlit
- KHR_texture_transform
- KHR_materials_anisotropy
- KHR_materials_transmission
- KHR_materials_sheen (some support)
Controls
| Action | Description |
|---|---|
LMB |
Rotate around the target |
RMB |
Dolly in/out |
MMB |
Pan along view plane |
LMB + Shift |
Dolly in/out |
LMB + Ctrl |
Pan |
LMB + Alt |
Look around |
Mouse wheel |
Dolly in/out |
Mouse wheel + Shift |
Zoom in/out (FOV) |
Space |
Set interest point on the surface under the mouse cursor. |
F10 |
Toggle UI pane. |
Change glTF model
- Drag and drop glTF files (
.gltfor.glb) into viewer
Change HDR lighting
- Drag and drop HDR files (
.hdr) into viewer
git clone --recursive --shallow-submodules https://github.com/nvpro-samples/nvpro_core.git
git clone https://github.com/nvpro-samples/vk_raytrace.git
Tags:
- raytracing, GLTF, HDR, tonemapper, picking, BLAS, TLAS, PBR material
Extensions:
- VK_KHR_RAY_QUERY_EXTENSION_NAME
- VK_KHR_RAY_TRACING_PIPELINE_EXTENSION_NAME
- VK_KHR_ACCELERATION_STRUCTURE_EXTENSION_NAME
- VK_KHR_SHADER_CLOCK_EXTENSION_NAME
- VK_KHR_MAINTENANCE3_EXTENSION_NAME
- VK_KHR_PIPELINE_LIBRARY_EXTENSION_NAME
- VK_KHR_DEFERRED_HOST_OPERATIONS_EXTENSION_NAME
- VK_KHR_BUFFER_DEVICE_ADDRESS_EXTENSION_NAME
- VK_EXT_SCALAR_BLOCK_LAYOUT_EXTENSION_NAME
- VK_EXT_DESCRIPTOR_INDEXING_EXTENSION_NAME
- VK_KHR_GET_MEMORY_REQUIREMENTS_2_EXTENSION_NAME
- VK_KHR_DEDICATED_ALLOCATION_EXTENSION_NAME
- VK_KHR_SWAPCHAIN_EXTENSION_NAME
- VK_KHR_GET_PHYSICAL_DEVICE_PROPERTIES_2_EXTENSION_NAME
- VK_EXT_DEBUG_UTILS_EXTENSION_NAME
- VK_KHR_SURFACE_EXTENSION_NAME
| Model | Link |
|---|---|
 |
2 Cylinder Engine |
 |
Alpha Blending |
 |
Anisotropy |
 |
Antique Camera |
 |
Boom Box |
 |
Carbon Fiber |
 |
Clear Coat |
 |
Corset |
 |
Damaged Helmet |
 |
Flight Helmet |
 |
Metal Rough Spheres |
 |
Punctual Light |
 |
SciFi |
 |
SpecGlossVsMetalRough |
 |
Unlit |
 |
Transmission |
 |
Box Vertex Color |