Question by robik_12 · Mar 31, 2017 at 10:46 PM · 2d background scrolling parallax ortographic

2D Parallax with zoom

Hello. I have seen a lot of tutorials/answers about how to make a scroll parallax. But I have not seen the zoom part anywhere.

I created a small script but he's not working correctly. Movement is working properly, zoom in working properly, but if i try zoom out (to 0.1-0.3) and then moving - the position of the object becomes incorrect.

How to fix it?

using UnityEngine;
[ExecuteInEditMode]
public class ScrollParallax : MonoBehaviour {
public Camera Camera;
public float Zoom = 1;
public float ParallaxCoef;
private float moveParallaxCoef;

 void Update()
 {
     moveParallaxCoef = Mathf.LerpUnclamped(1, 0, ParallaxCoef);
 }
 void LateUpdate()
 {
     var newSize = Mathf.Pow(Zoom, ParallaxCoef);
     var newScale = new Vector2(newSize, newSize);

     transform.localScale = newScale;

     var newPos = (Vector2)Camera.transform.position * (1 - newSize + newSize * moveParallaxCoef);
     transform.position = newPos;
 }

}

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