Merry, Bruce and Marais, Patrick and Gain, James (2006) Correct normal transformations for articulated models, CS06-01-00, Department of Computer Science, University of Cape Town.
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Abstract
It is well-established that when a matrix is used to transform a rigid object, the normals should be transformed by the inverse transpose of that matrix. However, this is only valid where the transformation matrix is locally constant. This is not the case for models animated with skeletal subspace deformation (SSD), where the transformation matrix is computed for each vertex. We derive a formula for correctly transforming normals on SSD models.
| Item Type: | Technical report |
|---|---|
| Uncontrolled Keywords: | skeletal subspace deformation, normal transformation |
| Subjects: | Computing methodologies > Computer graphics |
| Date Deposited: | 28 Mar 2006 |
| Last Modified: | 10 Oct 2019 15:35 |
| URI: | http://pubs.cs.uct.ac.za/id/eprint/302 |
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