Basic raytracer written completely in Rust.

To do:

• Make camera rotate with quaternion around stable axis (without roll)
• Increase efficiency of polygon hit calculation
• Normals for vertices, interpolate normal for polygon
• Add precompute function for shape to speed up rendering
• Basic Bounded Volume Hierarchy
• Replace Rayon for multithreading
• Improve BVH - https://jacco.ompf2.com/2022/04/13/how-to-build-a-bvh-part-1-basics/
• SIMD for BVH - Research and implementation
• Complete basic shader for Physically Based Rendering
• Multiple Importance Sampling - http://shihchinw.github.io/2015/06/implementing-ggx-brdf-in-arnold-with-multiple-importance-sampling.html
• Consider definitive image and display pipeline
• Transform linear color space to sRGB in final image
• Extend / rewrite world::parser to accept all .obj / .mtl files, and support textures for materials
• Extend materials to allow for texture maps