title: How to flip only one axis of transformation matrix?
body: <p>I have a 4x4 transformation matrix. However, after trying out the transformation I noticed that movement <strong>and</strong> rotation of the Y axis is going the opposite way. The rest is correct. </p>
  
  <p>I got this matrix from some other API so probably it is the difference of coordinate system. So, how can I flip an axis of transformation matrix?</p>
  
  <p>If only translation I can add minus sign on the Y translation, but I have no idea about opposite rotation of only one axis since all the rotation is being represented in the same 3x3 area. I thought there might be some way that even affect both translation and rotation at the same time. (truly flipping the axis)</p>