Giving It the Shape You Want
Creating the desired shape when modeling polygonal objects is all
about understanding how subdivision works. The desired shape
often depends on careful cuts and dense and structured wires. A
well-planned mesh can give desired results without excessive hours
of cutting and reshaping. Here we discuss some of the most impor-
tant aspects of planning complex geometry: edge flow and edge
loops.
Edge Flow
The edge flow represents the actual structure of your model and
how the topology must be constructed in order to work correctly
according to the anatomy of the model or object when animated and
to avoid unwanted gaps, hard edges, or subdivision artifacts.
Notice in Figure 3-39 that the lines of the male model (at left)
follow the flow of the human anatomy to provide the correct tension
and deformation of the muscles after the subdivision. The female
model’s abdomen (at right) is not correct from the muscle structure
standpoint, but the base mesh as shown can provide a good struc-
ture for an abdomen without bumpy musculature.
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Chapter 3 – Polygon Subdivision
Figure 3-39: Edge flow.
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