Background Changer on Variable

mchourdakis

A script that allows a Background Image to change automatically textures on specific variable values.
E.g. You have a camera that shows a house in day, afternoon, night, so you want 3 textures.

using UnityEngine;
using AC;

public class ACBackgroundSwitcher : MonoBehaviour
{
    [System.Serializable]
    public struct TextureEntry
    {
        public int variableValue;
        public Texture2D texture;
    }

    [Header("AC Global Variable")]
    public int variableID = 1;

    [Header("Active Camera Gate")]
    public _Camera targetCamera;  

    [Header("Textures")]
    public TextureEntry[] entries;

    private BackgroundImage bgImage;
    private int lastVal = int.MinValue;

    void Awake()
    {
        bgImage = GetComponent<BackgroundImage>();
    }

    void Update()
    {
        if (!IsTargetCameraActive())
        {
            return; /
        }

        int val = GlobalVariables.GetIntegerValue(variableID);
        if (val != lastVal)
        {
            lastVal = val;
            ApplyTexture(val);
        }
    }

    bool IsTargetCameraActive()
    {
        if (targetCamera == null) return false; 
        return KickStarter.mainCamera != null
            && KickStarter.mainCamera.attachedCamera == targetCamera;
    }

    void ApplyTexture(int val)
    {
        foreach (var entry in entries)
        {
            if (entry.variableValue == val)
            {
                bgImage.backgroundTexture = entry.texture;
                BackgroundImageUI.Instance.SetTexture(entry.texture);
                return;
            }
        }

        Debug.LogWarning($"[ACBackgroundSwitcher] Textre Not Found {val} (Variable ID: {variableID})");
    }
}