KCurve3d.getCurvatureVector() method

求曲线上某点处的曲率向量。

Get curve's curvature vector for the input point on the curve.

Signature:

getCurvatureVector(point: KPoint3d): KVector3d;

Links: getCurvatureVector(point: KPoint3d): KVector3d;

Parameters

Parameter	Type	Description
point	KPoint3d	曲线上一点。 A point on curve.

Returns:

KVector3d

曲率向量。 向量的模为曲率值，向量的方向为曲率方向。

A curvature vector. Its norm represents the curvature value. Its direction represents the curvature's direction.