Image generation apparatus, image generation method, image generation program recording medium, image composition apparatus, image composition method, and image composition program recording medium

摘要

An image generation apparatus for generating a three-dimensional image based on shape data as a set of polygons, which is represented by three-dimensional coordinates, comprises polygon identification means for identifying each polygon by deciding whether or not it is opaque, for the shape data as the set of polygons; image data calculating means for generating pixel values indicating luminance and color of respective pixels as display units of an image, depth values indicating depth with which polygons to be processed are displayed, and degrees of contribution indicating ratios of the polygons to be processed to pixels, from the shape data; temporal storage means for temporarily storing the pixel values, the depth values, and the degrees of contribution which have been generated by the image data calculating means; and image composition means for generating an image to be displayed from the pixel values temporarily stored in the temporal storage means, based on the degrees of contribution and the depth values stored in the temporal storage means. <IMAGE>