(Team 3) Shape Comparison for Free-Form Geometric Modeling

Monday, August 9, 2004 - 10:20am - 10:40am
Keller 3-180
Thomas Grandine (The Boeing Company)
Reference Paper: pdf

One operation which arises in geometric modeling is the comparison of two different geometric models. This operation arises naturally when reusing existing designs, identifying feature differences between two similar parts, tracking changes throughout the life cycle of a product, searching part databases for suitable designs, and protecting proprietary design data. One of the more intriguing ideas put forward in recent years is to make use of umbilic points on free-form surfaces. Generic umbilic points have the property that their presence and location is stable relative to small perturbations in a surface, so they seem ideally suited as markers for locating and comparing features on a pair of similar surfaces. This workshop will explore their use in shape comparison.

A paper on this topic was presented at the ACM 2003 Solid Modeling Symposium last June in Seattle. We will be applying some of the methods presented in this paper to some examples not covered in it in an attempt to gain insight into the suitability of the method for real, industrial work.