target	Object to point towards.
worldUp	Vector specifying the upward direction.

Rotates the transform so the forward vector points at target's current position.

Then it rotates the transform to point its up direction vector in the direction hinted at by the worldUp vector. If you leave out the worldUp parameter, the function will use the world y axis. worldUp is only a hint vector. The up vector of the rotation will only match the worldUp vector if the forward direction is perpendicular to worldUp.

	// This complete script can be attached to a camera to make it 
	// continuously point at another object.
	
	// The target variable shows up as a property in the inspector. 
	// Drag another object onto it to make the camera look at it.
	var target : Transform; 
	
	// Rotate the camera every frame so it keeps looking at the target 
	function Update() {
		transform.LookAt(target);
	}

using UnityEngine;
using System.Collections;

public class Example : MonoBehaviour {
    public Transform target;
    void Update() {
        transform.LookAt(target);
    }
}

import UnityEngine
import System.Collections

public class Example(MonoBehaviour):

	public target as Transform

	def Update() as void:
		transform.LookAt(target)

worldPosition	Point to look at.
worldUp	Vector specifying the upward direction.

Rotates the transform so the forward vector points at worldPosition.

Then it rotates the transform to point its up direction vector in the direction hinted at by the worldUp vector. If you leave out the worldUp parameter, the function will use the world y axis. worldUp is only a hint vector. The up vector of the rotation will only match the worldUp vector if the forward direction is perpendicular to worldUp.

	// Point the object at the world origin
	transform.LookAt(Vector3.zero);

using UnityEngine;
using System.Collections;

public class Example : MonoBehaviour {
    void Example() {
        transform.LookAt(Vector3.zero);
    }
}

import UnityEngine
import System.Collections

public class Example(MonoBehaviour):

	def Example() as void:
		transform.LookAt(Vector3.zero)