Add a trace ray method in Whitted tracer. I didn't realized that I had to keep the old one and create a new one with another parameter, so I just merged both of them and end up with black images.
Add SV_Lambertian BRDF and SV_Matte material to render textures.
Add mapping, image and image texture. Add u and v coordinates in ShadeRec member variables.
Remove clone when setting cd in SV_Lambertian and SV_Matte to avoid segfault. Add Spherical Map Mapping. Add Earth image to test spherical mapping. Change build function. Note: ppm images have to be in brut format, not in ASCII format.
Add Chacker3D texture and use it to render the firt plane checker.