Add basic background music behavior

Assets/Scripts/GameSystems/BGMusic.cs

@@ -0,0 +1,60 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+//Define the background music behavior.
+public class BGMusic : MonoBehaviour
+{
+    public int intensity =0; //Current intensity level
+    int intensityLevels = 2; //Number of intensity levels (differents tracks)
+    [SerializeField]
+    AudioClip AudioIntensity0, AudioIntensity1; //Must have enough clip foreach intensity levels
+
+    List<AudioSource> audioSources; //Sources used for each intensity clips
+
+    //Change the intensity level of the music
+    //TODO: Smooth transition
+    public void changeIntensity(int level)
+    {
+        if(level>=intensityLevels)
+        {
+            Debug.LogWarning(gameObject.name+" doesn't have such high intensity available :"+ level+ " /"+intensityLevels);
+            level = intensityLevels-1; //Max level
+        }
+            
+        for(int i=0; i<intensityLevels; i++)
+        {
+            if(i!=level)
+                audioSources[i].volume=0.0f;
+            else
+                audioSources[i].volume=1.0f;
+        }
+
+        intensity = level;
+    }
+
+    // Start is called before the first frame update
+    void Start()
+    {
+        audioSources = new List<AudioSource>(GetComponents<AudioSource>());
+        if(audioSources.Count != intensityLevels )
+            Debug.LogWarning(gameObject.name+" missing audio sources too play all intensity levels : "+ intensityLevels);
+
+        //Load clip
+        audioSources[0].clip = AudioIntensity0;
+        audioSources[1].clip = AudioIntensity1;
+
+        //Set initial intensity
+        changeIntensity(intensity);
+        
+        //Start sources
+        foreach(AudioSource s in audioSources)
+            s.Play();
+    }
+
+    // Update is called once per frame
+    void Update()
+    {
+        
+    }
+}

Assets/Scripts/GameSystems/BGMusic.cs.meta

@@ -0,0 +1,11 @@
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+guid: e845a10d8c5009048af900f3e22daa91
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Scripts/GameSystems/GameSystem.cs

@@ -30,6 +30,9 @@ public sealed class GameSystem : MonoBehaviour
     float slowScale = 0.5f; //Default scale for slow mode
     private float fixedDeltaTime;
 
+    //Sound
+    BGMusic BGmusic=null; //Background Music
+
     //TODO : Effect on gold change
     //Money
     private int gold;
@@ -101,6 +104,15 @@ public sealed class GameSystem : MonoBehaviour
         {
             // Make a copy of the fixedDeltaTime, it defaults to 0.02f, but it can be changed in the editor
             this.fixedDeltaTime = Time.fixedDeltaTime;
+
+            //Get BG music
+            GameObject musicObj = GameObject.Find("/GameSystem/AudioManager/BackgroundMusic");
+            if(musicObj != null)
+                BGmusic = musicObj.GetComponent<BGMusic>();
+            if(BGmusic is null)
+                Debug.LogWarning("No background music found");
+
+            //Get UI Service Timer
             GameObject timerObj = GameObject.Find("/UI/Canvas/ServiceTimer");
             if(timerObj is null)
             {
@@ -108,11 +120,10 @@ public sealed class GameSystem : MonoBehaviour
                 UIServiceTimer=null;
             }
             else
-            {
                 UIServiceTimer=timerObj.GetComponent<UITimer>();
-            }
 
-            if(ClientManager.Instance.ready && StockManager.Instance.ready)
+            //Check that all systems are ready
+            if(ClientManager.Instance.ready && StockManager.Instance.ready && EventManager.Instance.ready)
             {
                 ready=true;
                 Debug.Log("All GameSystems are ready");
@@ -151,7 +162,10 @@ public sealed class GameSystem : MonoBehaviour
             toggleSlowMode(2.0f);
             Debug.Log("Time scale: "+Time.timeScale);
         }
-        // Debug.Log("Service timer : "+(int)serviceTimer);
+
+        //Basic background music modification
+        if(ClientManager.Instance.clientList.Count>2 && BGmusic.intensity<1)
+            BGmusic.changeIntensity(1);
     }
 
     // simple Singleton implementation