*

Assets/Scripts/ParallaxBackground.cs

@@ -0,0 +1,68 @@
+using UnityEngine;
+using System.Collections;
+
+
+public class Utils {
+	public static Rect GetCameraRect2D(Camera cam){
+		float pixWidth = (cam.orthographicSize * Camera.main.aspect) * 2;
+		float pixHeight = cam.orthographicSize * 2;
+		
+		return new Rect(
+			Camera.main.transform.localPosition.x - (pixWidth * 0.5f), 
+			Camera.main.transform.localPosition.y + (pixHeight * 0.5f),
+			pixWidth, pixHeight);
+	}
+	
+	public static Rect RectFromBounds(Bounds b){
+		return new Rect (b.center.x - b.size.x * 0.5f, b.center.y + b.size.y * 0.5f, b.size.x, b.size.y);
+	}
+	
+}
+
+
+
+public class ParallaxBackground : MonoBehaviour {
+	public float scrollSpeed = 0.5f;
+	public bool KeepTextureAspect = true;
+	public Camera cam;
+	public float Scale = 0.01f;
+	public float LerpSpeed = 0.5f;
+	// Use this for initialization
+	void Start () {
+	
+	}
+	
+	// Update is called once per frame
+	void Update () {
+
+		Vector2 offset = gameObject.renderer.sharedMaterial.mainTextureOffset;
+		Vector3 mousePos = Input.mousePosition;
+		Vector2 screenCenter = new Vector2 (Screen.width / 2, Screen.height / 2);
+		Vector2 mouseDir = new Vector2 (mousePos.x, mousePos.y) - screenCenter;
+		Vector2 nextOffset = mouseDir * -Scale;
+
+		gameObject.renderer.sharedMaterial.mainTextureOffset = Vector2.Lerp (offset, nextOffset, LerpSpeed * Time.deltaTime);
+		//offset.x += tcScrollSpeed * Time.deltaTime;
+		//gameObject.renderer.sharedMaterial.mainTextureOffset =offset;
+
+
+		/*float textureAspect = gameObject.renderer.sharedMaterial.mainTexture.width / gameObject.renderer.sharedMaterial.mainTexture.height;
+		float textureScale = cam.aspect / textureAspect;
+		var camRect = Utils.GetCameraRect2D (cam);
+		float tcScrollSpeed = textureScale * scrollSpeed;
+
+		if (Application.isPlaying) {
+			Vector2 offset = gameObject.renderer.sharedMaterial.mainTextureOffset;
+			offset.x += tcScrollSpeed * Time.deltaTime;
+			gameObject.renderer.sharedMaterial.mainTextureOffset =offset;
+		}
+
+
+		if (KeepTextureAspect) {
+
+			gameObject.renderer.sharedMaterial.mainTextureScale = new Vector2(textureScale, 1);
+		}
+
+		transform.localScale = new Vector3 (camRect.width, camRect.height, 1);*/
+	}
+}