Ray is a simple ray tracer written from scratch in C++ to learn about graphics programming. It's written using a small subset of C++ very similar to C.
- Ray intersection with spheres, planes and triangle meshes
- Bounding volume hierarchies to speed up ray-mesh intersection
- Multithreading by rendering tiles of the output image in parallel
- Simple specular, refractive and emissive materials
- (0, 2)-sequence sampler for sample distribution and anti-aliasing
- Phisically based materials
- Light and shadow samples
- Realistic camera model and depth of field
To build ray download the repository and open a shell inside it. The executable is created in the build directory and must be executed from there to find the resource files in ../res
Visual Studio must be installed to build on windows.
cd build
build.bat
ray.exe out.bmp
cd build
./build.sh
ray out.bmp
Use ray -h for information about parameters
The dragon model in res/dragon.dae is a reformat of the scan from Stanford University Computer Graphics Laboratory. Redistribution of the model is allowed for non commercial purposes. The original model and additional information is available at http://graphics.stanford.edu/data/3Dscanrep/
Some of the intersection tests and geometry procedures are from Real-Time Collision Detection, CRC Press 2004 by Christer Ericson