G - Physics – 06 – T
Patent
G - Physics
06
T
G06T 15/00 (2006.01) G06T 15/40 (2006.01) G09G 5/36 (2006.01)
Patent
CA 2061332
-11- THREE-DIMENSIONAL GRAPHIC DISPLAY SYSTEM ABSTRACT OF THE DISCLOSURE: A three-dimensional graphic display system having an increased speed hidden-surface process capability. At a time when a depth buffer memory would be initialized in a conventional three-dimensional graphic display system, the depth buffer memory itself is not initialized and only bits of a high-speed memory corresponding to bits to be initialized in the depth buffer memory are initialized. When a hidden-surface process is executed, if the bits of the high-speed memory have been initialized, those initialization bits are changed to a non-initialized state and the latest Z coordinate data from a line generator is unconditionally written in the depth buffer memory. When the initialization bits of the high-speed memory are in a non-initialized state, a comparator compares Z coordinate data supplied from the depth buffer memory with the latest Z coordinate date supplied from the line generator. On the basis of the results of such comparison, a hidden-surface process is executed to display a three-dimensional graphic image.
Mitsubishi Denki Kabushiki Kaisha
Riches Mckenzie & Herbert Llp
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