| 摘要 |
One or more special merge vertices ( 1, 8 ) each of which is a root of two braches each including a monotonic (in respect to a particular coordinate) series of vertices are selected from an ordered arrangement of vertices ( 1 - 10 ) that defines a polygon ( 102 ). The special merge vertices ( 1, 8 ) can be sorted (according to the particular coordinate) so that they can be efficiently located when scanning through the polygon. In scanning through the polygon ( 102 ) in a process of rendering the polygon ( 102 ), the branches are used to demarcate boundaries of the polygon ( 102 ).
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