[Nimhfree]

Assuming you can plot the positions of where each action item will appear on your arbitrary curve, is the problem that you want the buttons to line up nicely next to each other and they are not in some cases based on your actual curve shape?

In other words: (1) you create this mathematic curve, (2) attempt to apply buttons, but because the buttons are squares or whatever shape you have them they do not fit nicely together, (3) want to make the buttons look nice along the curve so want to alter the curve to attempt to fit your original curve within the limits the shape of the buttons pose, (4) need to replot the points where the buttons will go based on this curve shaping.