[Greg McKaskle]

As for the distance error. It definitely should exist, but doesn't seem that bad for what I thought were reasonable shooting positions. Your milage may vary. A somewhat bigger issue is that this is a distance and position to the center of the rectangle, and that distance and angle may not be where you want to send the ball. If you want a swish-shot, you ideally want to know the center of the hoop. It is near the target, but not at the same position. If you way to bank shot, do you want to shoot at the center of the rect always, or perhaps a bit to the left or right according to angle. I think the answers depend on your shooter.

Of course if the shooter is not super repeatable, these calculations may be overkill.

Greg McKaskle