| 摘要 |
In some embodiments, an edge cache data table for edges shared by two or more geometrically contiguous patches is generated. An identification value is assigned for each patch. When a first patch has a common edge with a second patch, a unique identification value is generated for an entry in the table based on identification values of the two patches with a common edge. Attributes of a common edge are stored in the entry in the table associated with the unique identification value. When the common edge is to be evaluated for the second patch, the edge can be read from the table in reverse order.
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