Raytracing arbitrary surfaces

[kaanaksit]

In light of the given information, we challenge readers to create a new function inside odak.learn.raytracing submodule that replaces the current intersect_w_sphere function. In addition, the current unit test test/test_learn_ray_intersect_w_a_sphere.py has to adopt this new function. odak.learn.raytracing submodule also needs new functions for supporting arbitrary surfaces (parametric). New unit tests are needed to improve the submodule accordingly. To add these to odak, you can rely on the pull request feature on GitHub. You can also create a new engineering note for arbitrary surfaces in docs/notes/raytracing_arbitrary_surfaces.md.