THREE-DIMENSIONAL IMAGE GENERATING METHOD

摘要

PURPOSE:To obtain the three-dimensional image generating method which can eliminate processing having no direct contribution to image generation. CONSTITUTION:A processor 1 compares a depth coordinate value (z) among screen coordinates with the value in a Z buffer memory 3 in an implicit surface erasure processing step based upon Z buffer algorithm to decide the front-rear relation of a figure in picture element units and select graphic data which are closer to a point of vision, and stores the identification number of the figure in a frame buffer 2. Further, the processor 1 calculates brightness I on a screen in the picture element units in a brightness calculation step by using the identification number in the frame buffer 2 at the end of the implicit surface erasure processing step for all graphic data and stores the brightness in the frame buffer memory 2. Then the processor 1 displays a three-dimensional image on a display device 4 according to the contents of the frame buffer memory 2.