ENHANCEMENTS IN BLENDING ALGORITHMS

This article describes a rounding operation for a 3D CAD boundary repr esentation (B-Rep) solid model. Complex combinations of convex and con cave edges are handled predictably and reliably. At vertices the surfa ces are smoothly connected by one or more surface patches. An algorith m for the creation of blending surfaces and their integration into the model is outlined. The sequence of topological modifications applied to the solid model is illustrated by examples including some special c ase handling.