Raytracegroundup

This renderer is based on the original source code of the book named Ray Tracing From The Ground UP. I extended it from the following aspects. Objects: part of sphere, part of tori, globe, and so on. Tessellation: sphere, horn, rotational sweeping surfaces, bezier patches (Utah teapot). 2D texture: solid cylinder checker, sphere checker. Scene building: several scenes were built and the corresponding resultant images were produced.