GameJam Progress Day 2

Assets/Scripts/MusicManager.cs

@@ -0,0 +1,97 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.SceneManagement;
+
+[System.Serializable]
+public struct MusicMapping
+{
+    public string sceneName;
+    public AudioClip track;
+}
+public class MusicManager : MonoBehaviour
+{
+    public bool musicEnabled = true;
+    public MusicMapping[] musicMap;
+    public float crossfadeSpeed = 1;
+    public AudioSource[] audioSources;
+    public int activeAudioSource = 0;
+    [Range(0,1)]
+    public float crossfadeT = 1;
+
+    private void Awake()
+    {
+        if (GameObject.FindObjectsOfType<MusicManager>().Length != 1)
+        {
+            Destroy(this);
+        }
+    }
+    // Start is called before the first frame update
+    void Start()
+    {
+        DontDestroyOnLoad(this);
+        SceneManager.sceneLoaded += this.OnSceneLoaded;
+
+        this.LoadMeppedTrack(SceneManager.GetActiveScene().name);
+    }
+
+    private void Update()
+    {
+        this.crossfadeT = Mathf.Clamp( this.crossfadeT += this.activeAudioSource == 0 ?  .1f * this.crossfadeSpeed : -.1f * this.crossfadeSpeed, 0, 1);
+        float val = Mathf.Lerp(0, 1, this.crossfadeT);
+        this.audioSources[0].volume = val;
+        this.audioSources[1].volume = 1 - val;
+
+        if (this.musicEnabled == false)
+        {
+            this.audioSources[0].volume = 0;
+            this.audioSources[1].volume = 0;
+        }
+
+    }
+
+    private void LoadMeppedTrack(string sceneName)
+    {
+        foreach (MusicMapping mapping in this.musicMap)
+        {
+            if (mapping.sceneName == sceneName)
+            {
+                this.CrossfadeToTrack(mapping.track);
+                Debug.Log("MusicManager: Fading to track " + mapping.track.name);
+            }
+        }
+    }
+
+    public bool ToggleMusic()
+    {
+        this.musicEnabled = !this.musicEnabled;
+
+        return this.musicEnabled;
+    }
+    void OnSceneLoaded(Scene scene, LoadSceneMode mode)
+    {
+        this.LoadMeppedTrack(scene.name);   
+    }
+
+    public void CrossfadeToTrack(AudioClip audioClip, float speed)
+    {
+        this.crossfadeSpeed = speed;
+        if (this.audioSources[this.activeAudioSource].clip == audioClip) { return; } //Don't fade if it's the same clip
+        if (this.activeAudioSource == 0)
+        {
+            this.audioSources[1].clip = audioClip;
+            this.audioSources[1].Play();
+            this.activeAudioSource = 1;
+        }
+        else
+        {
+            this.audioSources[0].clip = audioClip;
+            this.audioSources[0].Play();
+            this.activeAudioSource = 0;
+        }
+    }
+    public void CrossfadeToTrack(AudioClip audioClip)
+    {
+        this.CrossfadeToTrack(audioClip, 1f);
+    }
+}