When pinch-rotating images in MTPhotoSortrDemo, they rotate around the center
of the image, not around the center of the pinch. Reported by Ralf (mr_roots).
The short-term solution is to figure out where the pinch center is within the
image when a pinch operation starts, then "pin" the center of the pinch to this
location, and rotate the image center position about this point.
The best long-term / general-purpose solution is to implement full affine
homogeneous matrices for all operations. However, this is slower, and it then
gets more complicated to extract transform parameters in simpler use cases,
such as when just the pinch distance and center is needed.
Original issue reported on code.google.com by luke.hutch on 22 Apr 2012 at 4:34
Original issue reported on code.google.com by
luke.hutchon 22 Apr 2012 at 4:34