This assignment and your next assignment are about the data structures used at the two ends of the $3$D graphics rendering pipeline; what goes into the beginning of the pipeline and what comes out of the end of the pipeline. Roughly, what goes into the pipeline is the Scene data structure which describes the geometry of what the renderer should draw. What comes out of the pipeline is the FrameBuffer data structure which holds the image of the scene drawn by the renderer. This assignment is about what comes out of the graphics pipeline, the FrameBuffer data structure. Assignment $2$ will be about what goes into the rendering pipeline, the Scene data structure.