KLineSegment2d 接口
export interface KLineSegment2d extends KBoundedCurve2d 
KLineSegment2d类代表二维空间的一个线段。
The KLineSegment2d class represents a line segment in 2d space.
继承: KBoundedCurve2d
属性
direction
readonly direction: KVector2d;
获得线段的方向。
Get line segment's direction.
类型: KVector2d
middlePoint
readonly middlePoint: KPoint2d;
获得线段的中点。
Get line segment's middle point.
类型: KPoint2d