G - Physics – 06 – T
Patent
G - Physics
06
T
375/21
G06T 15/30 (2006.01)
Patent
CA 1264878
ABSTRACT OF THE DISCLOSURE A method for drawing a curved figure on a display device under transformation, clipping, or mapping, is described which includes testing to determine whether transformation is to be performed; transforming parametric equations for the figure to be transformed and drawn; testing to determine whether the figure to be drawn is to be clipped against predetermined clipping boundaries; computing an extent of the figure to be drawn; applying a box clip test for trivial clipping for the entire figure; rejecting those figures which are entirely outside the viewport as determined by the trivial clipping test; accepting the entire figure to be drawn which has been determined to be completely within the clipping box; mapping the parametric equations if mapping is required; generating line segments for the figure to be drawn.
523774
Haskell Kirk S.
Liang Bob C.c.
International Business Machines Corporation
Saunders Raymond H.
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