| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain a graphic processor which controls an occurrence of operation error in a graphic Boolean operation and can accurately extract a shape of polygon constituting visible parts of object in the three-dimensional shape. <P>SOLUTION: When a shielding determination processing unit 6 determines that a surface of polygon is not shielded by a contour shape, a polygon shape output unit 7 outputs a shape of the polygon, and when the shielding determination processing unit 6 determines that the surface of polygon is partially shielded by the contour shape, the polygon shape output unit 7 generates a polygon excluding a surface shielded by the contour shape upon implementing a graphic Boolean operation between the surface of the polygon and the contour shape, and outputs a shape of the polygon. <P>COPYRIGHT: (C)2012,JPO&INPIT |
