Make something move away from click point.

Goal:

Trying click on a point and have a ball bounce away from that point. I am trying to do this in 2D so I have it ignoring the z component on the rigid body.

My Solution?

I think what I want to do is take the position of the ball (x,y), subtract the position of the mouse click (x,y) and use that to create a new vector to give the rigidbody as a force.

So Far:

I was able to get the position of the click into a Vector3.
I am not sure how to get the position of the ball into a Vector3.
I don’t know how to subtract the two, and if thats even the right idea.
I know how to give it a push in a direction using AddRelativeForce.

I was afraid to ask because I feel like I should understand more before attempting to get help.

To get the ball position:

private var xPos:float;
private var yPos:float;

xPos = ballObject.position.x;
yPos = ballObject.position.y;

Then you get the distance between your mouse click and ball position, see from here.

You can just use the distance to determine how powerful the force will be.

Thanks guys. I kept hacking at it and this is what I came up with. I am working in 3D but I am doing all resulting motion in 2D.

ballPoint = this.transform.position;
Ray ray = Camera.main.ScreenPointToRay (Input.mousePosition);
clickPoint = ray.GetPoint (10) ; 
clickPoint.z = 0; 	
			
Vector3 newVector = ballPoint - clickPoint;
newVector.Normalize();

rigidbody.AddForce(newVector*20,ForceMode.Impulse);

The part that was screwing me up, and I am still not entirely sure how it “works” is subtracting one vector from another, and then normalizing. But my ball now flys away from my mouse on click, so its started.