Question by reminiscity · Feb 19, 2014 at 10:14 PM · c#texture offset follow player parallax

renderer.material.mainTextureOffset based on player movement

Hi everbody I've searched for methods on how to make parallax scrolling background and ended up using a second camera that films the background textures and projects them at the background of the main camera. This works fine BUT I only want the background to move when the player move because I'm making a 2d platformer. How do I do it?

This is the script for moving the offset of the textures

public float speed = 0;

void Update () {

renderer.material.mainTextureOffset = new Vector2 (Time.time * speed, 0f);

}

I tried this

 void Update () {
 
     if (Input.GetKey ("d")){
     renderer.material.mainTextureOffset = new Vector2 (Time.time * speed, 0f);
     }
     if (Input.GetKey ("a")){
         renderer.material.mainTextureOffset = new Vector2 (Time.time * -speed, 0f);
     }
 }

And it kinda works... but the textures makes a big "jump" everytime I press "d" or "a" but after that is looks fine. But another problem is that if the player walks into a wall and keep pressing the d or a keys the background ofc still moves. What is the best way to make the offset change based on player movement?

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poncho · Feb 20, 2014 at 03:15 PM 0

try Time.deltaTime, ins$$anonymous$$d of Time.time

Gnometech · Feb 20, 2014 at 04:04 PM 1

Why don't you link the offset to the player's position ins$$anonymous$$d of key input? Because as ou rightly observe the keys can be pressed even if the player does not move.

 renderer.material.mainTextureOffset = new Vector2 (playerObject.transform.x * factor, 0f);

Now you only need to create a public GameOject playerObject and assign the player's object to it in the inspector and another public float factor that could be set to 0.5f for a start and see if this is what you need. :-)