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

Vector2d() [3/4] Vector2d ( double  x, double  y  ) 使用双精度浮点数初始化二维向量 使用双精度浮点数初始化二维向量。 参数 [in] x x 坐标 [in] y y 坐标