FairyGUI.DisplayObject.UpdatePivotOffset C# (CSharp) Method

        void UpdatePivotOffset()
        {
            float px = _pivot.x * _contentRect.width;
            float py = _pivot.y * _contentRect.height;

            //注意这里不用处理skew，因为在顶点变换里有对pivot的处理
            Matrix4x4 matrix = Matrix4x4.TRS(Vector3.zero, cachedTransform.localRotation, cachedTransform.localScale);
            _pivotOffset = matrix.MultiplyPoint(new Vector3(px, -py, 0));
        }