I want to have the parabola start wherever the ball was hit. The X position will be either 100 or 110, since that is the only two positions where it is possible to hit the ball. And the Y position will completely vary. So I need to create a parabola that - if your looking at a 2D table - starts from the right side of the net and ends up on the right side, as if you did an under arm hit. I have no ides how to do this since there will be no minus positions! - Maybe I should have two arcs one coming up and the other one coming down? I also have no idea what equation would make an trajectory in the shape of an arc.