LIGHTING PARAMETER STORAGE CIRCUIT FOR 3-DIMENSIONAL GRAPHICS AND COMPUTATION METHOD FOR LIGHTING PROCESSING USING THE LIGHTING PARAMETER

摘要

A light source parameter storage circuit for a 3D graphic and an illumination processing computation method using light source parameters are provided to compose the light source parameter storage circuit by using a memory circuit to save a circuit space occupied by the light source parameter storage circuit. A memory unit(510) includes a memory circuit which stores values of a plurality of light source parameters corresponding to a plurality of light sources. An initial value circuit(520) outputs an initial value of the light source parameter. A light source parameter selecting unit includes a multiplexer(530) and a register(540). The light source parameter selecting unit reads the value of the light source parameter corresponding to one of a plurality of the light sources from the memory unit(510), selects one of the read light source parameter value and the initial value, and outputs the selected value as a light source parameter.