Game Development Reference
In-Depth Information
FIGURE 6.7 OpenSim screen shot of the range of virtual forms that can be made with a sphere and its modiiers:
shown from the left going right they are: none, path cut, path cut and hollow, skew, hollow and twist, taper and hollow,
dimple begin and end, taper proile.
6.3.4 T he s phere
Spheres are geometrical perfection, one face; all vertices are equidistant from the center. You will note
that once you make a sphere that slice is no longer an option, and a new modiier has appeared called
dimple. Try twisting the sphere with the slice modiier in the Build/Create menu for some interesting
forms (Figure 6.7).
6.3.5 T he T orus
The torus is an interesting form. Created from an oval or circle that has been stood on edge and extruded
on a circular path, it looks like a doughnut and can be modiied into making car axles, bar stools, and
elf house roofs. This prim introduces another modiier, hole size, and now the modiiers proile cut, taper
proile, and revolutions will have some interesting effects. Look at the samples in Figure 6.8, and try out
these modiiers in the Build/Create menu.
6.3.6 T he T uBe
Tubes may fool you into thinking that they are cylinders with a hollow center, but in virtual worlds,
they are a different type of form. You will ind that the top and bottom faces of the tube will display a
texture map differently from a hollowed cylinder, and that is useful when you want a radiating texture
on a curved walkway. When a tube is created, the hole size setting is at 0.5; you will need to change that
to actually see that it is a tube. Try making the tube-based forms in Figure 6.9 with the modiiers in the
Build/Create menu.
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