Raykat

Simple raytracing engine in C (WIP). Based on Ray Tracing in One Weekend by Peter Shirley.

Watch image.png for a rough estimate of what the raytracer is capable of at this moment.

Build

Build with make:

$ make

To generate the image, run the make rule "image":

$ make image

Todo

Here is what I'm planning to to next (eventually):

• Improve vector operations: Changed pointer params to const.
• Fix the coordinate system: This was really as easy as changing v-up.
• Materials: Implemented. Lacks the shared pointer capability of the original. One material can only be used by one object.
• Const correctness: Const all the things.
• Inline utility functions: Vec3.h now just holds static inline declarations.
• Command line arguments: Reading resolution and other settings from argv.
• Read geometry from file: Implemented a rudimentary obj parser. Loading objs with tons of tris slows down renders tremendously though.
• Environment maps.
• Threading: I have no experience with pthread.h so this ought to be fun.
• Textures.
• Volumes.

References

• Ray Tracing in One Weekend by Peter Shirley
• raytracing-weekend by Morozov-5F
• Fast, Minimum Storage Ray/Triangle Intersection by Thomas Möller and Ben Trumbore