Sorting processor

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G06F 1572

Patent

active

054598222

ABSTRACT:
A sorting processor has a polygonal priority order generating circuit. The polygonal priority order generating circuit includes a memory for storing information of centers of plural polygons; a position setting section for transforming a coordinate of each of the polygonal centers from an object coordinate to an absolute coordinate; and a visual field transforming circuit for transforming the transformed coordinate as a position set object obtained by the position setting section with respect to a visual field. The sorting processor further has a sorting circuit for sorting transformed results about the visual field on the basis of Z-axis information. There is no frame delay due to a need to wait until the polygonal information is completely sorted. Further, it is not necessary to use a RAM for storing information geometrically transformed before a sorter.

REFERENCES:
patent: 4658247 (1987-04-01), Gharachorloo
patent: 5220646 (1993-06-01), Fossum
patent: 5249264 (1993-09-01), Matsumoto
patent: 5293467 (1994-03-01), Buchner et al.
patent: 5329613 (1994-07-01), Brase et al.
Williams, P., "Visibility Ordering Meshed Polyhedra", ACM Transactions on Graphics, vol. 11, No. 2, Apr. 1992, pp. 103-126.

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