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The AIM@SHAPE Glossary

Alphabetical list of terms

U

umbilical point
Surface point where the principal curvatures are equal. All the points in planar and spherical surface regions are umbilical.
uniform knot sequence
A knot sequence where all knots are equally spaced. One clear advantage of using uniform knot sequences can be found in the fact that the wavelet decomposition could be performed a-priori as the decomposition depends solely on the subspaces of the splines and is completely independent of the control points of the shapes.

 

 

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