Move rigidbody to a specific position?

Questions & Answers
1

For now I am using:

    Vector3 targetPos = new Vector3(43.4,2,2);
    void Update(){
    transform.position = Vector3.Lerp(transform.position,targetPos,(Time.deltaTime*3)/Vector3.Distance(targetPos,transform.position);
    }

This works nicely , but i need rigidbody with correct velocity and all simulations.

I don’t need rigidbody.MovePosition or rigidbody.position because that works but that doesn’t change velocity.

I need something that will return velocity.

3

To calculate a directional Vector :

var dir : Vector3 = target.position - transform.position;

to give this vector a magnitude in relation to speed, normalize it then multiply the result by the speed :

var dir : Vector3 = (target.position - transform.position).normalized * speed;

finally, simply apply the vector to the velocity variable of the rigidbody component :

rigidbody.velocity = dir;

Rigidbody :

Vector information :

To see if the rigidbody has reached the target, you could look into how waypoints are used and implemented. But here’s a quick and dirty way to check if a waypoint has been reached :

#pragma strict

var target : Transform;
var speed : float = 2.0;

private var desiredVelocity : Vector3;
private var lastSqrMag : float;

function Start() 
{
	// calculate directional vector to target
	var directionalVector : Vector3 = (target.position - transform.position).normalized * speed;
	
	// reset lastSqrMag
	lastSqrMag = Mathf.Infinity;
	
	// apply to rigidbody velocity
	desiredVelocity = directionalVector;
}

function Update() 
{
	// check the current sqare magnitude
	var sqrMag : float = (target.position - transform.position).sqrMagnitude;
	
	// check this against the lastSqrMag
	// if this is greater than the last,
	// rigidbody has reached target and is now moving past it
	if ( sqrMag > lastSqrMag )
	{
		// rigidbody has reached target and is now moving past it
		// stop the rigidbody by setting the velocity to zero
		desiredVelocity = Vector3.zero;
	} 
	
	// make sure you update the lastSqrMag
	lastSqrMag = sqrMag;
}

function FixedUpdate() 
{
	rigidbody.velocity = desiredVelocity;
}
2

Assuming you are using a rigidbody, and assuming there are no other forces (like gravity) impacting the rigidbody, you can do something like:

rigidbody.velocity = (targetPos - transform.position).normalized * speed;

Note this is done once, not in every frame. And it will not stop at your targetPos unless you write code to make it stop. ‘speed’ is a variable you define, will be in units per second, and for your question would be 2.0.