Graphics Programs Reference
In-Depth Information
Four-Curve Patches
Patches defined by four curves work almost
exactly the same as ones defined by three
curves. The endpoints of each curve must
be welded to the endpoints of its neighbor-
ing curves, and the order in which the
curves are selected still controls what the
Make Spline Patch interface thinks of as
parallel and perpendicular. The one thing
that really differentiates four-curve patches
is that the segments don't “bunch up” in a
Figure 12-7: Layer 2 of SplinePatchExamples has this neat, little funky shape to
play with.
Figure 12-8
