Method, apparatus, storage medium, program, and program product for generating image data of virtual three-dimensional space

摘要

A method for reflecting color data of back or far surfaces of a plurality of transparent polygons overlapped with each other in an eyes direction, on a display screen. The method for generating image data of a virtual three-dimensional space viewed from a predetermined view point, comprises: determining a plurality of transparent primitive surfaces in the virtual three-dimensional space; operating an angle between an eyes direction at the predetermined view point and a normal direction to each of the transparent primitive surfaces; deciding a description order of the plurality of transparent primitive surfaces so as to give priority one of the transparent primitive surfaces when the angle is an acute angle over one of the transparent primitive surfaces when the angle is an obtuse angle; and describing the plurality of transparent primitive surfaces by composing color data of the transparent primitive surfaces in the description order.