Affine invariance refers to the property of a mathematical object or function that remains unchanged under affine transformations, which include linear transformations followed by translations. In the context of non-uniform rational B-splines (NURBS), this means that the shape and structure of the curves or surfaces defined by NURBS do not alter when subjected to operations such as scaling, rotation, or translation. This characteristic is crucial because it allows for consistent modeling and manipulation of geometric shapes in computer graphics and CAD applications.
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