Cannonball physics?

[helloiam]

Hi guys I want to create a game that when I click on the screen a ball goes smoothly to my mouse position, I did a little scripting and it works but what this script of mine does is when I click on the screen it is going immediately to my mouse position, what I really
want is that you have a begin position like in the middle of the screen and then whe I click it goes to my mouse position, so my mouse position is the end.

NOTE:

spot.position is the position is the begin position and pos is the end position.
I did tried Vector3.lerp and .MovePosition and I tried AddForce but with Vector3.Lerp and MovePosition it works but as i wrote before it goes immediately to the end point which is my mouse position I want that it goes like this video:

- YouTube

Please take a look and help me out, this is really important for me.

Thanks in advance guys!

A little script of mine:

cannonShot.Play();

        journeyLength = Vector3.Distance(spot.position, pos);

        float distCovered = (Time.time - startTime) * 20f;
        float fracJourney = distCovered / journeyLength;

        depth = 15f;

        pos = Camera.main.ScreenPointToRay(Input.mousePosition).GetPoint(depth);

        Rigidbody ball = Instantiate(cannonBall, spot.position, Quaternion.identity) as Rigidbody;

        ball.rigidbody.MovePosition(Vector3.Lerp(spot.position, pos, fracJourney));

        //ball.rigidbody.AddForce(transform.forward * 200);
        //ball.rigidbody.AddForce(transform.up * 500);

        cannonTop.transform.LookAt(pos);

[robertbu]

Here is a bit of untested code to head you in the right direction. With a 3D environment when you write of “middle” and “click” you have to consider how far into the screen. This code use 10 units. You will need to adjust for whatever distance you need:

void shootInput()
{
		Vector3 v3Center = Camera.main.ViewportToWorldPoint(0.5f, 0.5f, 10.0f);
		
        cannonShot.Play();
 
        GameObject ball = Instantiate(cannonBall, v3Center, Quaternion.identity);
		
		Vector3 pos = Input.mousePosition;
		pos.z = 10;
		pos = Camera.main.ScreenToWorldPoint(pos);
		
		ball.transform.LookAt (pos);
        ball.rigidbody.AddForce(transform.forward * 2000);
 
        cannonTop.transform.LookAt(pos);
}