[PD] distortion of gem visuals

[punchik punchik]

hello list, i want to project some gem visuals to a concave surface, and i was wondering if there is a way to distort the gem window in a way that it can fix the distortion generated by the surface, for example if i distort the gem windows as fisheye and i project to the concave surface the image is gonna appear fine . Which do you think is the best way of doing this in puredata? is it possible to use pixel shaders to do this? or which ideas do you have for doing this? maybe theres a program designed or libraries for doing this? any idea would be appreciated



many thanks

pun.