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Realtime GPU Path Tracing engine based on OpenCL and OpenGL

Join my telegram channel, where I post everything related to graphics! https://t.me/cg_lib

Watch demo on YouTube Bistro scene

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