| 摘要 |
PCT No. PCT/JP95/01204 Sec. 371 Date Feb. 15, 1996 Sec. 102(e) Date Feb. 15, 1996 PCT Filed Jun. 16, 1995 PCT Pub. No. WO95/35554 PCT Pub. Date Dec. 28, 1995The present invention is geared to provide a polygon data conversion device and three-dimensional simulator apparatus capable of efficiently using hardware that cannot form backface polygons. A coordinate inversion section (410) performs horizontally and vertically inverts the vertex coordinates of an input polygon based on horizontal and vertical inversion flags. A back-and-front determination section (408) determines whether the input polygon is a backface or frontface polygon, by checking the sequence of numbers allocated to the vertices. An allocation sequence switching section (420) switches this allocation sequence based on an exclusive OR of the back determination flag, horizontal inversion flag, and vertical inversion flag. A vertex number assignment section (422) assigns the vertex numbers of the original input polygon to polygonal segments of that polygon. Data such as the vertex coordinates and reversed vertex coordinates of this polygon is read from a data memory (412) in accordance with these vertex numbers. |
