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Master thesis: Interactive Physically-based Rendering
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README.md

Physically-based Rendering

Rendering 3D scenes physically-based through Path Tracing. Interaction of light with surfaces is evaluated through bi-directional reflection distribution functions (BRDF). — Master Thesis 2013/14

Acceleration structure: BVH

  • Stackless traversal.
  • 1 or 2 faces per leaf node.
  • Code for use of spatial splits in build process exists, but seems faulty. Should not be used.

Requirements

  • OS: Linux
    Though it should be possible to built and run it on other platforms as well. I just never tried it.
  • Hardware: GPU with OpenCL 1.1 and OpenGL 3.1 capabilities
    Tested only with NVIDIA.

Libraries/headers

  • freeglut3-dev
  • libboost-dev
  • libdevil-dev
  • libglew-dev
  • libglm-dev
  • libqt5core5a
  • libxi-dev
  • libxmu-dev
  • opencl-headers

NVIDIA and OpenCL

If there are problems to get NVIDIA hardware to work with OpenCL (which is very likely in my experience), here is some trouble shooting:

  • Check if you have this file: /etc/OpenCL/vendors/nvidia.icd
    The name doesn't really matter, but there has to be a file with the name or path of the NVIDIA OpenCL lib, e.g.: /usr/lib/x86_64-linux-gnu/libnvidia-opencl.so.346.82 or just libnvidia-opencl.so.1
    Check which library files you have with locate libnvidia-opencl.so.

  • I have the following installed and it works:

      libcg
      libcggl
      libcuda1-361-updates
      nvidia-cg-dev
      nvidia-cg-toolkit
      nvidia-361-updates
      nvidia-common
      nvidia-modprobe
      nvidia-prime
      nvidia-opencl-icd-361-updates
      nvidia-settings
      ocl-icd-libopencl1
      opencl-headers
    

Build and execute

cmake -DCMAKE_BUILD_TYPE=Release CMakeLists.txt
make
./PBR

Notes

  • NVIDIA only supports OpenCL 1.1. OpenCL 1.2 support seems unlikely at the moment.
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