aha

Assets/Mirror/Examples/AdditiveLevels/Scripts/FadeInOut.cs

@@ -0,0 +1,77 @@
+using System.Collections;
+using UnityEngine;
+using UnityEngine.UI;
+
+namespace Mirror.Examples.AdditiveLevels
+{
+    public class FadeInOut : MonoBehaviour
+    {
+        [Header("Components")]
+        [SerializeField] Image panelImage;
+
+        [Header("Settings")]
+        [SerializeField, Range(1, 10)]
+        [Tooltip("Time in seconds to fade in")]
+        byte fadeInTime = 2;
+
+        [SerializeField, Range(1, 10)]
+        [Tooltip("Time in seconds to fade out")]
+        byte fadeOutTime = 2;
+
+        bool isFading;
+
+        void OnValidate()
+        {
+            if (panelImage == null)
+                panelImage = GetComponentInChildren<Image>();
+
+            fadeInTime = (byte)Mathf.Max(fadeInTime, 1);
+            fadeOutTime = (byte)Mathf.Max(fadeOutTime, 1);
+        }
+
+        public float GetFadeInTime() => fadeInTime + Time.fixedDeltaTime;
+
+        public IEnumerator FadeIn()
+        {
+            //Debug.Log($"FadeIn {isFading}");
+            yield return FadeImage(0f, 1f, fadeInTime);
+        }
+
+        public float GetFadeOutTime() => fadeOutTime + Time.fixedDeltaTime;
+
+        public IEnumerator FadeOut()
+        {
+            //Debug.Log($"FadeOut {isFading}");
+            yield return FadeImage(1f, 0f, fadeOutTime);
+        }
+
+        private IEnumerator FadeImage(float startAlpha, float endAlpha, float duration)
+        {
+            if (panelImage == null) yield break;
+
+            if (isFading) yield break;
+
+            // Short circuit if the alpha is already at endAlpha
+            Color color = panelImage.color;
+            if (Mathf.Approximately(color.a, endAlpha)) yield break;
+
+            isFading = true;
+
+            float elapsedTime = 0f;
+            float fixedDeltaTime = Time.fixedDeltaTime;
+
+            while (elapsedTime < duration)
+            {
+                elapsedTime += fixedDeltaTime;
+                float alpha = Mathf.Lerp(startAlpha, endAlpha, elapsedTime / duration);
+                panelImage.color = new Color(color.r, color.g, color.b, alpha);
+                yield return new WaitForFixedUpdate();
+            }
+
+            // Ensure the final alpha value is set
+            panelImage.color = new Color(color.r, color.g, color.b, endAlpha);
+
+            isFading = false;
+        }
+    }
+}