angle coordSystem coordSystem det dx dy getCoordSystem hasMirror inverse invert isConformal isEqualTo isIdentity isInvertible isOrtho kIdentity m11 m12 m21 m22 Matrix2d Matrix2d Matrix2d Matrix2d mirroring mirroring operator!= operator* operator* operator* operator*= operator*= operator/ operator/= operator== postMultBy preMultBy rotation scale scaleBy scaleBy scaleX scaleY scaling scaling set setCoordSystem setToIdentity setToMirroring setToMirroring setToProduct setToRotation setToScaling setToScaling setToShearing setToTranslation shearing transformPoints transformVectors transformWith2P translation

scaling() [2/2] Matrix2d Matrix2d::scaling ( float  scaleX, float  scaleY, const Point2d &  center = Point2d::kOrigin()  ) static 得到以一点为中心的放缩变换矩阵 参数 scaleX 在X方向上的放缩比例 scaleY 在Y方向上的放缩比例，如果为0则取为scaleX center 放缩中心点 返回 新的变换矩阵 函数调用图: