"Air Hockey" Game using Unity 4.3 2D features

Hi,
I am trying to develop a 2D “Air Hockey” Game using Unity 4.3 2D features, and basically I want the player to control the Paddle using the mouse to hit the Puck.

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• The Paddle have a 2D circle collider and a rigidbody2D.
• The Puck have a 2D circle collider with a bouncy physics materiel and a rigidbody2D.

But when the Paddle hit the Puck it barely moves, it’s like the Paddle have no velocity when moved through the mouse.

I think need a way to convert the mouse velocity into the Paddle’s rigidbody2D velocity, in 3D the method “rigidbody.movePosition” allow us to do that, but I can’t find it’s equivalent in rigidbody2D.

Do you have any ideas how to solve this?

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I use the following script to get the Paddle to follow the mouse:

	float distance_to_screen ;
	Vector3 pos_move;
	void OnMouseDrag()
	{
		distance_to_screen = Camera.main.WorldToScreenPoint(gameObject.transform.position).z;
		pos_move = Camera.main.ScreenToWorldPoint(new Vector3(Input.mousePosition.x, Input.mousePosition.y, distance_to_screen));
		transform.position = new Vector3( pos_move.x, pos_move.y, pos_move.z );	
	}

Thank you.

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