OBJ Viewer

Texture mapping has been implemented into the renderer but not the parser. My next step is to add textures to the parser so that the user can load the textures automatically instead of manually writing the filepath. I have already set up the structs for MTL support, including a hashmap to allow for string-indexing.

This update might be a little boring, but I genuinely spent hours debugging a problem with the normals that occured on high-poly models. It added random empty spots in the model and it was genuinely so satisfying to fix it. All that was happening was that it was dividing by zero and returning NaN; I just added a check to avoid NaN.

I added smooth (phong) shading to my OBJ viewer, and prepared the code for texture mapping.