公开(公告)号：US20140200864A1

公开(公告)日：2014-07-17

申请号：US14157421

申请日：2014-01-16

Applicant: AUTODESK, INC.

Inventor： Heinz H. Bauschke ,  Valentin R. Koch

IPC: G06F17/50

CPC classification number: G06F17/50 ,  G06F2217/06

Abstract: A method, apparatus, system, and computer program product provide the ability to modify a spline (e.g., a civil engineering spline). The spline, defined by a set of connected points, is obtained/acquired. A design constraint set is determined and may include an interpolation constraint (specifying a fixed elevation for a connected point), a slope constraint (specifying a bound on a slope between two of the connected points), and a curvature constraint (specifying; a maximum slope difference of a first slope and a second slope between three connected points). The spline is projected onto the design constraint set thereby modifying the spline by changing elevations of the connected points The modified spline is then projected onto the design constraint set iteratively until the spline satisfies all constraints in the design constraint set.

Abstract translation: 方法，装置，系统和计算机程序产品提供修改样条（例如土木工程样条）的能力。 获取/获取由一组连接点定义的样条线。 确定设计约束集，并且可以包括内插约束（指定连接点的固定高程），斜率约束（指定在两个连接点之间的斜率上的界限）和曲率约束（指定;最大值 三个连接点之间的第一斜率和第二斜率的斜率差）。 将样条投影到设计约束集上，从而通过改变连接点的高度来修改样条曲线然后将修改的样条线迭代地投影到设计约束集上，直到样条曲线满​​足设计约束集合中的所有约束条件为止。

公开(公告)号：US09886527B2

公开(公告)日：2018-02-06

申请号：US14157421

申请日：2014-01-16

Applicant: Autodesk, Inc.

Inventor： Heinz H. Bauschke ,  Valentin R. Koch

IPC: G06F17/50

CPC classification number: G06F17/50 ,  G06F2217/06

Abstract: A method, apparatus, system, and computer program product provide the ability to modify a spline (e.g., a civil engineering spline). The spline, defined by a set of connected points, is obtained/acquired. A design constraint set is determined and may include an interpolation constraint (specifying a fixed elevation for a connected point), a slope constraint (specifying a bound on a slope between two of the connected points), and a curvature constraint (specifying; a maximum slope difference of a first slope and a second slope between three connected points). The spline is projected onto the design constraint set thereby modifying the spline by changing elevations of the connected points. The modified spline is then projected onto the design constraint set iteratively until the spline satisfies all constraints in the design constraint set.