I’ve tested the program with six force sensitive resistors and it works. There are now vertices drawn where force is applied in the grid of sensors.
Another neat thing the program does now is keeps track of how long a sensor is active. This will be a useful parameter for determining how to erase or not erase drawn objects.
I’m going to test more at once (up to 15 on the board I’m using) and then determine how to arrange them in a larger space—work on the physical stuff for this project, then return the program to make it more fun.