KEllipticalArc2d.getTangent() method

获得椭圆弧上一点处的切向量。 注意：该函数调用需要确保传入点在椭圆弧上。

Get tangent vector of a point on the elliptical arc. NOTE: the caller needs to make sure the point is on the arc.

Signature:

getTangent(point: KPoint2d): KVector2d;

Links: getTangent(point: KPoint2d): KVector2d;

Parameters

Parameter	Type	Description
point	KPoint2d	椭圆弧上一点。 A point on the arc.

Returns:

KVector2d

切向量。

The tangent vector.