System and method for snapping normals to create fair 3D surfaces from edge curves

摘要

A computer-implemented method for generating a three dimensional (3D) surface based on a closed edge curve is disclosed. The method includes receiving an input corresponding to a plurality of curves joined to define a single edge loop, analyzing each of the plurality of curves to define a plurality of edge segments based on an identified curve feature, calculating snap normal vectors for the endpoints of each of the plurality of edge segments such that the normal vectors are an estimate of a continuous three dimensional (3D) surface defined by the single edge loop, dividing the segmented edge loop into sub-loops based on the plurality of edge segments, determining the surface normal vectors for the sub-loops and combining these values with the snap surface normals at each end point to produce a final surface normal for each end point, and generating the continuous 3D surface based on triangles associated with the segmented edge loop and the surface normals associated with the end points.