From scope inner part side from forward the scope or forward the scope directing Z

摘要

PROBLEM TO BE SOLVED: To provide a three-dimensional image drawing device which can quickly sort polygons, and also provide a sorting-processing method.;SOLUTION: The three-dimensional image drawing device is provided with; a memory 30 which stores sorting data including depth values which are the functions of the depths on a screen of polygons; a sorting-data reading control circuit 100 which reads out the sorting data from the memory 30 according to a starting address stored in a buffer 140 for a reading-start address value and an end address stored in a buffer 150 for a reading-end address value; a depth value comparison circuit 120 which compares the depth value of the sorting data thus read out with a reference depth value; and reading-start address determination circuit 160 and reading-end address determination circuit 170 which each control a reading-start address and a reading-end address, respectively, in accordance with the sorting data having image-drawing order determined, when the sorting data are repeatedly read out from the memory 30.;COPYRIGHT: (C)2007,JPO&INPIT