How to Keep a Unity2D GameObject Stationary Relative to the Camera

Unity2D game development often requires precise control over the positioning of game objects relative to the camera. When the camera moves, it can be challenging to keep a specific GameObject in the same position relative to the camera. In this guide, we will explore two methods to achieve this: parenting the GameObject to the camera and adjusting its position in the script using the Update method.

Parenting the GameObject to the Camera

Parenting a GameObject to the camera in Unity2D is a straightforward approach to keep the object stationary relative to the camera. This method ensures that the GameObject will move with the camera while maintaining its position relative to the screen.

Hierarchy Setup

1. In the Unity Editor, drag your GameObject onto the Camera in the Hierarchy window. This action makes the GameObject a child of the Camera.

Positioning

2. Set the local position of the GameObject to where you want it to be relative to the Camera. For example, to keep it in the center of the screen, you would set its local position to 0, 0, 0.

This setup ensures that the GameObject will move with the Camera, maintaining its relative position. This method is ideal for static offsets and simplifies the process for developers who want a straightforward solution.

Adjusting Position in Script

If you need more control or prefer not to parent the GameObject to the Camera, you can use a script to update its position every frame. This method provides flexibility and allows for dynamic positioning based on the camera's movement.

Create a Script

1. Create a new C# script named FollowCamera.cs and attach it to the GameObject you wish to keep stationary.

Script Code

using UnityEngine public class FollowCamera : MonoBehaviour { public Camera mainCamera; // Assign your camera in the Inspector public Vector3 offset; // Set the desired offset in the Inspector void Start() { if mainCamera null { mainCamera ; // Automatically get the main camera if not assigned } } void Update() { // Update the position of the GameObject based on the camera's position and the offset transform.position offset; } }

Configure the Script

3. In the Unity Inspector, you can set the mainCamera variable to your camera and adjust the offset to define how far from the camera the GameObject should be positioned.

Summary

Parenting is the simplest method, ideal for static offsets and ensuring that the GameObject moves with the Camera. By adjusting the position in a script, you gain more flexibility and control over the GameObject's positioning.

Choose the Method That Best Fits Your Needs

Consider your project's requirements when deciding between these two methods. If you need a quick and easy solution, parenting to the Camera is sufficient. For more control and dynamic positioning, using a script is the way to go.