init

Assets/Free 2D Cartoon Parallax Background/Demo/Script/BackgroundControl_0.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class BackgroundControl_0 : MonoBehaviour
+{
+    [Header("BackgroundNum 0 -> 3")]
+    public int backgroundNum;
+    public Sprite[] Layer_Sprites;
+    private GameObject[] Layer_Object = new GameObject[5];
+    private int max_backgroundNum = 3;
+
+    public bool enableSwitching = false;
+    void Start()
+    {
+        for (int i = 0; i < Layer_Object.Length; i++){
+            Layer_Object[i] = GameObject.Find("Layer_" + i);
+        }
+        
+        ChangeSprite();
+    }
+
+    void Update() {
+        if(!enableSwitching){return;}
+        //for presentation without UIs
+        if (Input.GetKeyDown(KeyCode.RightArrow)) NextBG();
+        if (Input.GetKeyDown(KeyCode.LeftArrow)) BackBG();
+    }
+
+    void ChangeSprite(){
+        Layer_Object[0].GetComponent<SpriteRenderer>().sprite = Layer_Sprites[backgroundNum*5];
+        for (int i = 1; i < Layer_Object.Length; i++){
+            Sprite changeSprite = Layer_Sprites[backgroundNum*5 + i];
+            //Change Layer_1->7
+            Layer_Object[i].GetComponent<SpriteRenderer>().sprite = changeSprite;
+            //Change "Layer_(*)x" sprites in children of Layer_1->7
+            Layer_Object[i].transform.GetChild(0).GetComponent<SpriteRenderer>().sprite = changeSprite;
+            Layer_Object[i].transform.GetChild(1).GetComponent<SpriteRenderer>().sprite = changeSprite;
+        }
+    }
+
+    public void NextBG(){
+        backgroundNum = backgroundNum + 1;
+        if (backgroundNum > max_backgroundNum) backgroundNum = 0;
+        ChangeSprite();
+    }
+    public void BackBG(){
+        backgroundNum = backgroundNum - 1;
+        if (backgroundNum < 0) backgroundNum = max_backgroundNum;
+        ChangeSprite();
+    }
+}