Realtime GPU Path Tracing engine based on OpenCL and OpenGL

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Watch demo on YouTube

Features

• Unidirectional wavefront path tracer done entirely on GPU using compute shaders
• OpenCL backend
• OpenGL backend (WIP)
• Hybrid path tracing (rasterization of the primary visibility) in OpenGL mode
• Lambert diffuse, GGX reflection BRDF
• Explicit point, directional light sampling
• Simple temporal reprojection filter
• Depth, normals, albedo, motion vectors AOV generation
• Hot kernel reloading
• OpenCL/OpenGL interop for presenting the image

Building

1. Clone the repository git clone --recursive https://github.com/AlexanderVeselov/RayTracing.git
2. Generate a solution using CMake
3. Open the solution and build RayTracingApp project

Running

• Run RayTracingApp executable
• You can provide the following optional arguments
  • -w, -h window width and height
  • --scene <path> path to scene to be loaded
  • --scale <scale> scale of the imported scene
  • --flip_yz 0/1 flip Y and Z axis of the scene (some scenes have Y up and some have Z up)
  • --opengl 0/1 use OpenGL-only mode
• You can also run run_bistro.bat, it will download Amazon Lumberyard Bistro content to assets folder, build the project and run it with the scene.