THREE-DIMENSIONAL CG PLOTTING DEVICE FOR CURVED SURFACE DISPLAY

摘要

PROBLEM TO BE SOLVED: To provide a device where a bent three-dimensional CG image is not plotted on the boundary line of a square which constitutes a mesh by providing a curved surface coordinate system triangle plotting rectangular area calculating part for calculating a rectangular area for plotting a triangle in a curved surface display frame memory. SOLUTION: The curved surface coordinate system triangle plotting rectangular area calculating part 120 calculates the rectangular area for plotting the triangle in the curved surface display frame memory 170. A curved surface coordinate system triangle inside/outside judging part 130 judges the inside/ outside of the triangle by a curved surface display device coordinate system. A plane→curved surface display coordinate converting table 150 converts a plane display device coordinate value into a curved surface display device coordinate value. A curved surface→plane display coordinate converting table 160 converts the curved surface display device coordinate value into the plane display device coordinate value.