Re : Comparing intersection points of array object list

If you're comparing different classes against each other, you gotta specify its data-type in the method parameter:

 void drawLine(CellOne other) {
    line(location.x, location.y, other.location.x, other.location.y);
  }

So, instead of CellOne other, change it to the type of the class you wanna compare CellOne to.

You should post your current attempts since most has been changed for sure.