A ray tracing engine written from scratch in C++, with no external dependencies (except libpng). The first priority of this project has been to write readable code, so that it can be used as a learning tool.
Geometry:
- Arbitrary object transformations
- Wavefront OBJ parser
- Two level Bounded Volume Hierarchies
- Implicit surfaces through Ray Marching
- Signed Distance Function intersections
- Parametric Surfaces (Paraboloids, etc)*
- Surfaces of revolution*
- Beveled curves and knots*
- Displacement mapped planes / spheres*
- Basic L-Systems
* Converted to meshes
Shading:
- Ambient Occlusion
- Path tracing with next event estimation
- Direct Lighting
Materials (Path tracing):
- Specular reflection
- Specular transmission
- Lambertian
- Oren Nayar
- Sampled BRDFs (MERL)
Misc:
- Procedurally generated textures
- Depth of Field
- Environment Maps
- Volumetric surfaces
Some meshes from the following resource have been tested successfully: McGuire Computer Graphics Archive.
Currently the engine only supports PNG/PPM/BMP3 files, so if the textures included with the .obj file is in a different format, then use the provided script ./scripts/convert_images.sh