Take a sheer, which fixes eye hat and smashes jay hat over to the right, and a 90 degree rotation.

再来一圈 可以固定眼睛帽 把松鸦帽砸向右边 然后90度旋转。

To figure out what happens to any vector after a 90 degree rotation, you could just multiply its coordinates by this matrix.

要算出任何向量在旋转90度后会发生什么 你可以用这个矩阵乘以它的坐标。