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Subsections
1.0
 characterize the local vertex geometry and topology
 evaluate the decimation criteria
 triangulate the resulting hole
2.0
Figure:
The vertex categories. Reproduced from Schroeder et al.

Figure:
The distance to the average plane. Reproduced from Schroeder et al.

Figure:
The splitplane algorithm. The average plane of the removed vertex's
neighbors is shown, along with the split plane, shaded, that is orthogonal to
it, and the split line, bold, which will become a new edge in the model. The
three lines connected by two points in the average plane of the picture are the
edges of the hole that is being filled in. Reproduced from Schroeder et al.

Next: Analyzing Geometric Error
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Tim Garthwaite
20020203