Ray Tracing in Rust

This began as an implementation of the exercises in Ray Tracing in One Weekend in Rust, but I've added my own extensions.

STL models, cubes and K-d Trees

reading STL binary models, making cubes from triangles, using K-d Trees to accelerate ray-triangle interections within a mesh.

Ray Tracing in One Weekend renders

Non exhaustive list of other RTIOW implementations:

• https://github.com/fralken/ray-tracing-in-one-weekend
• https://github.com/perliedman/raytracing-in-one-weekend
• https://github.com/alexislozano/raytracing
• https://bitshifter.github.io/2018/04/29/rust-ray-tracer-in-one-weekend/
• https://misterdanb.github.io/raytracinginrust/