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ATI Radeon® Skinning and Tweening
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The Radeon® is unique in its ability to support both four-matrix skinning and tweening. The vertex blending and tweening equation supported by Radeon® is as follows:
b0 * MV0 * v{0|1} +
b1 * MV1 * v{0|1} +
b2 * MV2 * v{0|1} +
b3 * MV3 * v{0|1}
- where
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- bn
is the nth blend weight
- MVn is the nth Modelview
matrix
- v{0|1} represents either v0
or v1
With this equation, applications can use Radeon® to perform skinning, tweening or a combination of the two.
Normals are also skinned and tweened by substituting the
inverse transpose MVn into the above equation.
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