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Warnock's Algorithm
A divide and conquer algorithm
Warnock (PolyList PL, ViewPort VP)
If (PL simple in VP)
then Draw PL in VP,
else
Split VP vertically and horizontally into VP1, VP2, VP3, VP4
Warnock (PL in VP1, VP1)
Warnock (PL in VP2, VP2)
Warnock (PL in VP3, VP3)
Warnock (PL in VP4, VP4)
End
What does "simple" mean?
No more than one polygon in viewport
Scan convert polygon clipped to viewport
Viewport only 1 pixel in size
Shade pixel based on closest polygon in the pixel
Area Subdivision Method In this method, the viewport is examined for clear decisions on the polygons situated in it, in regard to their overlap and visibility to the viewer. Fo
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