Methods and systems for generating continuous surfaces from polygonal data

摘要

Methods and systems for generating surface data from polygonal data are disclosed. The methods and systems receive polygonal data which describe discrete points on an object. The methods and systems analyze and use the data to calculate and define a continuous BREP object which accurately represents the original polygonal object. In some embodiments, the generated BREP is G2 continuous at substantially all points.

主权项

1. A method of producing BREP data from electronic polygonal data, the method comprising:
accessing the polygonal data with a computer, the polygonal data defining a mesh of polygonal data points, each having a valence corresponding with the number of polygons defined thereby, wherein the data points comprise:
a plurality of valence four data points having a valence of four, anda plurality of non-valence four data points having a valence other than four; selecting one or more of the non-valence four data points, wherein the selected non-valence four data points are selected at least partly on the basis of having a valence other than four; generating a plurality of continuous curves, wherein each of the continuous curves terminates on one of the selected non-valence four data points and passes through one or more particular valence four data points; based at least in part on the continuous curves, generating a plurality of surface boundaries defining one or more continuous surfaces; generating the BREP data based at least in part on the continuous surfaces; and storing the BREP data in a computer readable data storage.