float rot = 0.01f;//업데이트시 로테이션 rad 추가량
        float cx = 200;//회전중심점 x
        float cy = 200;//회전중심점 y

        void Test()//업데이트 함수 
       {
            Matrix _transform = Matrix.Identity;
            
            _transform *= Matrix.CreateTranslation(-cx, -cy, 0);
            _transform *= Matrix.CreateRotationZ(rot);
            _transform *= Matrix.CreateTranslation(cx, cy, 0);

            rad += rot; //변환을 위한 rad 값 축적 , 실제 rad

            var v0 = Vector2.Transform(new Vector2(p[0].x, p[0].y), _transform);
            p[0].x = v0.X;
            p[0].y = v0.Y;

            var v1 = Vector2.Transform(new Vector2(p[1].x, p[1].y), _transform);
            p[1].x = v1.X;
            p[1].y = v1.Y;

            var v2 = Vector2.Transform(new Vector2(p[2].x, p[2].y), _transform);
            p[2].x = v2.X;
            p[2].y = v2.Y;

            var v3 = Vector2.Transform(new Vector2(p[3].x, p[3].y), _transform);
            p[3].x = v3.X;
            p[3].y = v3.Y;
        }

        float rad = 0;
        void TestRed()//변환함수
        {
            float mx = Mouse.GetState().X;
            float my = Mouse.GetState().Y;
            

            double rx = (mx - s.x) * Math.Cos(-rad) - (my - s.y) * Math.Sin(-rad);
            double ry = (mx - s.x) * Math.Sin(-rad) + (my - s.y) * Math.Cos(-rad);

            trace(rx, ry);
            if (0 < rx && rx < 128 && 0 < ry && ry < 128)
                trace("TRUE");

            mp.x = (float)rx + s.x ;
            mp.y = (float)ry + s.y ;
        }