August 2005
Intermediate to advanced
744 pages
24h 28m
English
Content preview from Complete Maya Programming Volume II
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9.3 NURBS Surfaces
4 51
The normal is the vector perpendicular to the surface. This can be calculated by
performing the cross product of the two tangents.
normal = tangentU ^ tangentV
= dP/du ^ dP/dv
The normal is therefore a vector that is perpendicular to the plane formed by the u
and v tangents. It has to be normalized to ensure that it is a unit vector.
Measure Tools
The Parameter tool can be used to display the u and v coordinate of a NURBS sur-
face point.
1. Open the PlaneNurbs.ma scene.
2. Select
Create] Measure Tools] Parameter
Tool.
3. Click on the NURBS surface.
A paramDimension node is created. It displays ...
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