Legacy Documentation: Version 5.2
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Transform.forward

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public var forward: Vector3;
public Vector3 forward;

Description

The blue axis of the transform in world space.

var thrust: float;
var rb: Rigidbody;

function Start() { rb = GetComponent.<Rigidbody>(); }

function Update () { rb.AddForce(transform.forward * thrust); }
using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour { public float thrust; public Rigidbody rb; void Start() { rb = GetComponent<Rigidbody>(); } void Update() { rb.AddForce(transform.forward * thrust); } }

Another example:

	// Computes the angle between the target transform and this object
	var angleBetween = 0.0;
	var target : Transform;
	function Update () {
		var targetDir = target.position - transform.position;
		angleBetween = Vector3.Angle (transform.forward, targetDir);
	}
using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour { public float angleBetween = 0.0F; public Transform target; void Update() { Vector3 targetDir = target.position - transform.position; angleBetween = Vector3.Angle(transform.forward, targetDir); } }