타이틀 타이밍

Assets/02_Scripts/Intro/IntroBGMController.cs

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+using System.Collections;
+using UnityEngine;
+
+[RequireComponent(typeof(AudioSource))]
+public class IntroBGMController : MonoBehaviour
+{
+    [Header("Audio Source")]
+    [SerializeField] private AudioSource audioSource;
+
+    [Header("Start Timing")]
+    [SerializeField] private bool playOnStart = true;
+    [SerializeField] private float startDelay = 0.5f;
+
+    [Header("Fade In")]
+    [SerializeField] private bool useFadeIn = true;
+    [SerializeField] private float fadeInDuration = 2.0f;
+    [Range(0f, 1f)]
+    [SerializeField] private float targetVolume = 0.55f;
+
+    [Header("Loop")]
+    [SerializeField] private bool loop = true;
+
+    private Coroutine bgmRoutine;
+
+    private void Awake()
+    {
+        if (audioSource == null)
+        {
+            audioSource = GetComponent<AudioSource>();
+        }
+
+        audioSource.playOnAwake = false;
+        audioSource.loop = loop;
+        audioSource.volume = 0f;
+        audioSource.spatialBlend = 0f;
+    }
+
+    private void Start()
+    {
+        if (playOnStart)
+        {
+            PlayBGM();
+        }
+    }
+
+    public void PlayBGM()
+    {
+        if (audioSource == null || audioSource.clip == null)
+        {
+            Debug.LogWarning("[IntroBGMController] AudioSource 또는 AudioClip이 없습니다.");
+            return;
+        }
+
+        if (bgmRoutine != null)
+        {
+            StopCoroutine(bgmRoutine);
+        }
+
+        bgmRoutine = StartCoroutine(PlayBGMRoutine());
+    }
+
+    private IEnumerator PlayBGMRoutine()
+    {
+        if (startDelay > 0f)
+        {
+            yield return new WaitForSeconds(startDelay);
+        }
+
+        audioSource.volume = useFadeIn ? 0f : targetVolume;
+        audioSource.loop = loop;
+        audioSource.Play();
+
+        if (useFadeIn)
+        {
+            float elapsed = 0f;
+
+            while (elapsed < fadeInDuration)
+            {
+                elapsed += Time.deltaTime;
+                float t = Mathf.Clamp01(elapsed / fadeInDuration);
+                float easedT = EaseOutCubic(t);
+
+                audioSource.volume = Mathf.Lerp(0f, targetVolume, easedT);
+
+                yield return null;
+            }
+
+            audioSource.volume = targetVolume;
+        }
+
+        bgmRoutine = null;
+    }
+
+    public void StopBGM(float fadeOutDuration = 1.0f)
+    {
+        if (audioSource == null)
+            return;
+
+        if (bgmRoutine != null)
+        {
+            StopCoroutine(bgmRoutine);
+        }
+
+        bgmRoutine = StartCoroutine(StopBGMRoutine(fadeOutDuration));
+    }
+
+    private IEnumerator StopBGMRoutine(float fadeOutDuration)
+    {
+        float startVolume = audioSource.volume;
+        float elapsed = 0f;
+
+        while (elapsed < fadeOutDuration)
+        {
+            elapsed += Time.deltaTime;
+            float t = Mathf.Clamp01(elapsed / fadeOutDuration);
+            float easedT = EaseOutCubic(t);
+
+            audioSource.volume = Mathf.Lerp(startVolume, 0f, easedT);
+
+            yield return null;
+        }
+
+        audioSource.volume = 0f;
+        audioSource.Stop();
+
+        bgmRoutine = null;
+    }
+
+    private float EaseOutCubic(float t)
+    {
+        return 1f - Mathf.Pow(1f - t, 3f);
+    }
+}