| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To rapidly carry out a drawing process and to display a relatively precise character or relatively many characters. <P>SOLUTION: A simple model for an object to be processed is acquired; Z-values and display coordinates relating to respective apexes of the simple model from a predetermined view point are calculated; a rectangular Z-region according to the calculated display coordinates is detected; and the detected Z-region is subjected to a conversion process to a predetermined size with its feature kept. The minimum value Z1MIN of the simple model is extracted; the minimum value Z1MIN of the simple model is compared with all Z-values stored in a Z buffer at that time in a conversion region; and, when it is determined that the minimum value Z1MIN of the simple model is greater than the maximum value Z2MAX in the conversion region, a processing amount is reduced by avoiding a process by an actual model by skipping a predetermined successive process. When an identification code is added to data of the apex of the object, processing is carried out by the data of the actual model without using the data of the simple model depending on the type of the object according to the identification information. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
