The composition formula (2.19) in the manual is a bit odd...

[GouZi2019]

If we perform a rigid transformation T1 and an nonrigid transformation T2 on the image one after another, then the transformation should be composited as T1◦T2, right?

Please refer to the link: https://www.javatpoint.com/computer-graphics-composite-transformation

However, the order of transformations in the composition formula (2.19) in the manual is reversed.