For a project i'm doing I am extending a piece of software and implementing a fisheye affect to a grid.
I can find algorithms for normal grids but i need the focus points width and height or each cell to continue to the top and left etc. Because other wise the user can't tell the cell numbers for the focus points!
I have found the effect i want in this paper http://www.cs.wisc.edu/graphics/Papers/Gleicher/fisheye-retarget.pdf
yet no algorithm. At the bottom their are graphical examples of the different effects discussed in the paper and the one i am after is the last one: Cartesian/Quadratic.
Any help on hunting down algorithm?