公开(公告)号：US09269189B1

公开(公告)日：2016-02-23

申请号：US13827243

申请日：2013-03-14

Applicant: Autodesk, Inc.

Inventor： Martin Cvetanov Marinov ,  Adam Helps ,  Gordon Thomas Finnigan ,  Thomas Warren Sederberg ,  Xin Li

IPC: G06T17/20 ,  G06F17/50

CPC classification number: G06T17/205 ,  G06F17/5018 ,  G06F17/5086 ,  G06T17/30

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for constructing a trim-free T-spline surface and control mesh for a NURBS surface control grid of a B-rep face; modifying the trim-free T-spline control mesh to align the trim-free T-spline surface boundary with a functional trimming curve; and redefining one or more faces in the modified trim-free T-spline control mesh that is adjacent to the trimming curve as a variable knot spline face.

Abstract translation: 方法，系统和装置，包括在计算机存储介质上编码的计算机程序，用于构建用于B-rep面的NURBS表面控制网格的无修剪的T样条曲面和控制网格; 修改无修剪的T样条控制网格，将无修剪的T样条曲面边界与功能修剪曲线对齐; 并且将与修剪曲线相邻的经修改的无修剪的T样条控制网格中的一个或多个面重新定义为可变结花键面。