Method and apparatus for antialiasing raster scanned, polygonal

Details Method and apparatus for antialiasing raster scanned, polygonal Method and apparatus for antialiasing raster scanned, polygonal

1993-10-06

1996-06-18

Nguyen, Phu K.

G06F 314

Patent

active

055287387

ABSTRACT:
A method and apparatus for drawing at least a one pixel wide antialiased line on an edge of a filled polygon. The apparatus comprises an interpolator, having a set up unit and an iterator unit, and a blender. The set up unit determines various parameters of the line to be drawn and selects a pair of pixels adjacent to and straddling an idealized line representing the line to be drawn, where the first pixel is claimed by the edge of the polygon as a filled pixel. The iterator unit determines the coverages of the second pixel based on the parameters output by the set up unit. The blender determines the color intensity value of the second pixel as a function of its coverage and writes the color value into a memory. The apparatus also incorporates methods for antialiasing polygon meshes and resolving accumulation error in the derivation of each pixel's position.

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Sfarti "Antialiased Bresenham Lines for x Implementation", Computer Graphics, International, Tokyo, Jun. 26, 1992.

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