Modeling of wrinkles and its application in footwear design

We develop a parametric description of a wrinkle as a shape feature that may be superposed upon selected regions of a 3D surface defined by B-splines or NURBS. We show the use of such a feature in footwear design. We found that the shape modification operator for such a feature can be developed using geodesic offsets. A computer program has been implemented providing such a feature, and some examples of the output of the program are presented hi this paper. We also address the need for automatically generating 2D surface developments of 3D shapes with superposed wrinkles. A finite-element style iterative algorithm is outlined for the performing this task; a new distortion energy model is developed for this algorithm in this paper.