Ok, well it's still unclear what you want to do although I have an
idea as to what your setup is. If you're just trying to correspond a
pressure location to a screen location, then it should be quite simple
to figure out how to map one to the other. Imagine you have a
coordinate system for your mat and a coordinate system for your image.
Getting one point on the map to correspond to one point on the screen
is simply a matter of determining how the coordinates transform from
one space to the other. Basically, figuring out relative orientation
(is one flipped with respect to the other?), figuring out relative
scale (is one bigger than the other?) etc. Your values should all
follow the same transformation if you are dealing with 2 grids.
Thanks for the explanation and patch.. I am sorry that it took me a while to read the answer..but I am new to this mailing list and I am still confused between the mailing list and this list...