Coordinate transformation apparatus and method

Details Coordinate transformation apparatus and method Coordinate transformation apparatus and method

1994-11-30

1998-05-05

Nguyen, Phu K.

G06F 1500

Patent

active

057488690

ABSTRACT:
A texture mapping coordinate transformation apparatus for producing post-transformation coordinates by a ratio of plural polynomials having pre-transformation coordinates as variables in order to map a texture picture on a polygon defined by perspective coordinates on a display screen to thereby generate an output display picture on the display screen, and which includes a post-transformation coordinate memory for storing the post-transformation coordinates an error evaluation value memory for storing error evaluation values of the post-transformation coordinates, an error judgment detector for determining that the error evaluation value is within a tolerable range, an initial value setting circuit for setting respective initial values of the post-evaluation coordinate memory and the error evaluation value memory based upon the pre-transformation coordinates, an updating circuit for updating the contents of the post-transformation coordinate memory and the error evaluation value memory responsive to an output of the error judgment circuit, and a circuit for sequentially finding the post-transformation coordinates from the pre-transformation coordinates.

REFERENCES:
patent: 5265197 (1993-11-01), Kondo

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