Version: 2022.3
LanguageEnglish
  • C#

Transform.up

Suggest a change

Success!

Thank you for helping us improve the quality of Unity Documentation. Although we cannot accept all submissions, we do read each suggested change from our users and will make updates where applicable.

Close

Submission failed

For some reason your suggested change could not be submitted. Please <a>try again</a> in a few minutes. And thank you for taking the time to help us improve the quality of Unity Documentation.

Close

Cancel

Switch to Manual
public Vector3 up;

Description

The green axis of the transform in world space.

Manipulate a GameObject’s position on the Y axis (green axis) of the transform in world space. Unlike Vector3.up, Transform.up moves the GameObject while also considering its rotation.

When a GameObject is rotated, the green arrow representing the Y axis of the GameObject also changes direction. Transform.up moves the GameObject in the green arrow’s axis (Y).

For moving the GameObject on the Y axis while ignoring rotation, see Vector3.up.

using UnityEngine;

public class Example : MonoBehaviour { Rigidbody2D m_Rigidbody; float m_Speed;

void Start() { //Fetch the Rigidbody component you attach from your GameObject m_Rigidbody = GetComponent<Rigidbody2D>(); //Set the speed of the GameObject m_Speed = 10.0f; }

void Update() { if (Input.GetKey(KeyCode.UpArrow)) { //Move the Rigidbody upwards constantly at speed you define (the green arrow axis in Scene view) m_Rigidbody.velocity = transform.up * m_Speed; }

if (Input.GetKey(KeyCode.DownArrow)) { //Move the Rigidbody downwards constantly at the speed you define (the green arrow axis in Scene view) m_Rigidbody.velocity = -transform.up * m_Speed; }

if (Input.GetKey(KeyCode.LeftArrow)) { //rotate the sprite about the Z axis in the positive direction transform.Rotate(new Vector3(0, 0, 1) * Time.deltaTime * m_Speed, Space.World); }

if (Input.GetKey(KeyCode.RightArrow)) { //rotate the sprite about the Z axis in the negative direction transform.Rotate(new Vector3(0, 0, -1) * Time.deltaTime * m_Speed, Space.World); } } }