August 2014
Intermediate to advanced
469 pages
16h 30m
English
Content preview from GPGPU Programming for Games and Science
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GPU Computing 133
FIGURE 4.5: A two-dimensional illustration of pixel ownership using the
top-left rasterization rule.
The concept of half-open interval may be extended to triangles in 2D.
Edges are either horizontal (y is constant) or not horizontal. If a triangle edge
is horizontal and all triangle points are on or below that edge, the edge is said
to be a top edge. If a triangle edge is not horizontal and all triangle points in
the rows spanned by the edge are on or right of that edge, the edge is said to be
a left edge. A triangle has one or two left edges but does not necessarily have
a top edge. Similar to the 1D rasterization shown in Figure
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