KGeomLoop2d 接口

export interface KGeomLoop2d 

二维环的接口类。

The interface of a geometry loop 2d.

方法

area

area(): number;

获得二维环的面积。

The area of the loop2d.

返回值： number

返回二维环的面积。

Return the area of the loop2d.

centroid

centroid(): KPoint2d;

获得二维环的质心。

The centroid of the loop2d.

返回值： KPoint2d

返回二维环的质心。

Return the centroid of the loop2d.

containsPoint

containsPoint(point: KPoint2d, bIncludeOn?: boolean): boolean;

检查传入点是否在二维环中。

Check point is inside of geometry loop2d.

参数：

• point: KPoint2d

  被判断点。

  The check point

• bIncludeOn: boolean

  是否考虑二维环的边界, 默认不考虑。 Whether to consider the case: input point is on the loop2d's boundary. True means the point is on the boundary of the loop2d is also be think in loop2d. Default value is false.

返回值： boolean

返回输入点是否在二维环中。

Return true if the point is in loop2d.

getCurves

getCurves(): KBoundedCurve2d[];

获得二维环的所有轮廓线数组。

The curves of a loop2d.

返回值： KBoundedCurve2d[]

返回二维环的所有轮廓线。

Return all curves of the loop2d.

isCCW

isCCW(): boolean;

判断该二维环是否为逆时针。

Whether the loop is counter-clockwise.

返回值： boolean

返回二维环的绕向是否为逆时针。

Return true if the loop2d is counter-clockwise.

isSelfIntersect

isSelfIntersect(): boolean;

该环是否自相交。

Whether the loop is self-intersect.

返回值： boolean

返回二维环是否存在自相交。

Return true if the loop2d is self-intersected.

isValid

isValid(): boolean;

检查该二维环是否有效：是否自相交， 是否封闭，轮廓线是否一个一个首尾向量。 Whether the loop is valid: - no self-intersection, - closed, - connected one by one and tail to head.

返回值： boolean

返回二维环是否有效。

Return true if the loop2d is valid.