THREE-DIMENSIONAL FIGURE DRAWING PROCESSOR, IMAGE DISPLAY DEVICE, THREE-DIMENSIONAL FIGURE DRAWING PROCESSING METHOD, CONTROL PROGRAM FOR EXECUTING THE METHOD BY COMPUTER, AND COMPUTER READABLE RECORDING MEDIUM RECORDED WITH THE PROGRAM

摘要

PROBLEM TO BE SOLVED: To save a memory area by making it possible to use a line buffer as a display image data storage area without using an area DDA and to perform antialiasing excellently by suppressing an increase in a calculation period of time by a calculation matched to a polygon side without lowering the precision as much as possible. SOLUTION: In the three-dimensional figure drawing processor 1, intersection coordinates of the polygon side and a scan side are obtained only from information on a start vertex-terminal vertex of the polygon side while changing a calculation method according to polygon side characteristics. Further, a blending coefficient for the antialiasing is obtained by calculating an area rate occupied by a polygon internal area in pixel. COPYRIGHT: (C)2006,JPO&NCIPI