This is a deferred renderer with voxel cone traced indirect diffuse and specular reflections, ambient occlusion and soft shadows. The voxel grid is a mipmapped 3D texture which contains a voxelized representation of the directly lit polygonal scene. The cone travels through the mipmap levels and gathers samples along the way.

You're probably most interested in ./src/shaders/ and ./screenshots/.

The application uses OpenGL 4.5, GLEW for loading OpenGL, GLFW for window management, tinyobjloader to load obj-files, lodepng to load png-images, ImGui for the UI and GLM as a math library. All the dependencies are included in the lib-folder.

Build with the following commands:

$ mkdir build && cd build
$ cmake ..
$ cmake --build .

Run the binary from data/vxgi.exe. Press F1 to enable/disable the UI. Use WASD to fly around.

You can also run the binary from the command line with a scene as an argument:

$ cd data
$ vxgi.exe sponza

Selectable scenes include cornell, suzanne, and sponza.

v1.2 - 12/2023
* added cmake
* added glfw sources
* code cleanups

v1.1 - 11/2020
* public release

v1.0 - 06/2020

See Interactive Indirect Illumination Using Voxel Cone Tracing by Crassin et al.

Models and textures downloaded from Morgan McGuire's Computer Graphics Archive.

MIT