Cracks
Cracks are an important part of inorganic modeling. With polygons
you can set a variety of cracks in just about any type of object. Fig-
ures 3-62 to 3-67 show how to create a crack in an object.
Starting with a 12-sided cylinder, we approximate three edges,
as shown on the right in Figure 3-62. Notice that this modification
changes nothing when rendered.
Pushing down the middle vertices makes a very smooth crack
appear, as the tension there is very low.
69
Chapter 3 – Polygon Subdivision
Figure 3-62
Figure 3-63
Figure 3-64 shows two edges after a chamfer operation. The tension
generates a sharp crack.
All the edges are involved now and there is more tension.
70
Chapter 3 – Polygon Subdivision
Figure 3-64
Figure 3-65
Figure 3-66
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