alongLineAngleMoveDistancePt alongLineNormalDir alongLineNormalMoveDistancePt Angle Distance Distance FromPolar GetAngle IsEqual IsLess IsNull Length moveAlongLine Negate Normalize operator* operator* operator*= operator+ operator+ operator+= operator- operator- operator-= operator/ operator/= operator= operator== Perpendicular perpendicularPointOnLine ProjectToLine Rotate Scale Set Sqr Vector2d Vector2d Vector2d Vector2d x y

moveAlongLine() Vector2d moveAlongLine ( const Vector2d &  rclP0, const Vector2d &  rclP1, double  d  ) const 计算沿直线 P0P1 移动距离 d 的点 计算沿直线 P0P1 移动距离 d 的点。 参数 [in] rclP0 直线的起点 [in] rclP1 直线的终点 [in] d 移动距离 返回 移动后的点