Add AudioManager + Evolutive Background music

Assets/Scripts/GameSystems/AudioManager.cs

@@ -0,0 +1,73 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public sealed class AudioManager : MonoBehaviour
+{
+    public static string AudioManager_path="/GameSystem/AudioManager";
+    //Singleton
+    private static AudioManager _instance=null;
+    public static AudioManager Instance { get 
+        { 
+        if(_instance is null) //Force Awakening if needed
+            GameObject.Find(AudioManager_path).GetComponent<AudioManager>().Awake();
+        return _instance; 
+        } 
+    }
+
+    [HideInInspector]
+    public bool ready = false; //Wether the AudioManager is initialized
+
+    [SerializeField]
+    BGMusic BGMusic = null; //Background music script
+
+    [SerializeField]
+    float clientWeight=1.0f, HardObsWeight=1.0f, SoftObsWeight=1.0f; //Importance of each entity
+
+    float maxEntity; //Maximum entities (client + events) weighted by importance 
+    float currentNbEntity; //Current number of entities (Client + events) weighted by importance 
+
+    //Update audio intensity
+    void updateIntensity()
+    {
+        //Intensity change thresholds
+        float upThreshold = ((BGMusic.Intensity+1)*maxEntity)/BGMusic.Levels;
+        float downTreshold = ((BGMusic.Intensity)*maxEntity)/BGMusic.Levels; //add -1 or % to prevent constant change ?
+        // Debug.Log(gameObject.name+" - treshold : (+)"+upThreshold+"/(-)"+downTreshold);
+
+        //Update intensity
+        if(BGMusic.Intensity<(BGMusic.Levels-1) && currentNbEntity> upThreshold) //Increase Intensity if needed
+            BGMusic.Intensity++;
+        else if(BGMusic.Intensity>0 && currentNbEntity< downTreshold) //Decrease Intensity if needed
+            BGMusic.Intensity--;
+    }
+
+    // Start is called before the first frame update
+    void Awake()
+    {
+        //Singleton
+        if (_instance != null && _instance != this)
+            Destroy(this.gameObject);
+        else
+            _instance = this;
+        
+        if(!ready)
+        {
+            if(BGMusic is null)
+                Debug.LogError(gameObject.name+" doesnt have a background music script");
+
+            //Maximum entity weighted by importance 
+            maxEntity = clientWeight*ClientManager.Instance.MaxClients+HardObsWeight*EventManager.Instance.MaxEvents("Hard")+SoftObsWeight*EventManager.Instance.MaxEvents("Soft");
+
+            ready = true;
+        }
+    }
+
+    // Update is called once per frame
+    void Update()
+    {
+        //Update current number of entity (weighted)
+        currentNbEntity=clientWeight*ClientManager.Instance.clientList.Count+HardObsWeight*EventManager.Instance.eventCount("Hard")+SoftObsWeight*EventManager.Instance.eventCount("Soft");
+        updateIntensity();
+    }
+}