ABSTRACT
The rasterization operation, which generates a virtual image of a scene, has two elements: a strategy for traversing the pixels on the virtual screen and a method of calculating the color value at each pixel (i.e., to perform the sampling of the shading function). Starting from the illumination calculation of the scene, we have the shading function that associates, to each point P on the virtual screen, the value of the luminous energy (color) arriving at that point along the direction of the center of projection (the observer’s position).
