| 摘要 |
PROBLEM TO BE SOLVED: To render an appropriate image with low computational complexity irrespective of the rendering order of polygons when rendering an object of varying transparency. SOLUTION: A fade-in/out varies the transparency of an object to set anαvalue variation rate of every frame. Theαvalue variation rate of the object to be processed is multiplied by a reference threshold and then divided by 100 to set a written threshold. As polygons included in the object are sequentially processed, and anαvalue registered about the polygon to be processed is multiplied by theαvalue variation rate and then divided by 100 to produce a currentαvalue. The polygon is image-rendered in a frame buffer unless a Z value larger than a Z value of the polygon is registered in a Z-buffer, and only if the currentαvalue is larger than the written threshold, the Z value of the polygon is written into the Z-buffer. If a Z value larger than the Z value of the polygon is already registered in the Z-buffer, the polygon is not rendered in the frame buffer. COPYRIGHT: (C)2005,JPO&NCIPI |
