做不出来

Assets/Scripts/MainGame/Effects/AfterImage/AfterImageItem.cs

@@ -0,0 +1,57 @@
+using UnityEngine;
+
+namespace Cielonos.MainGame.Effects
+{
+    /// <summary>
+    /// 单个残影个体生命周期与渐隐控制器。
+    /// </summary>
+    public class AfterImageItem : MonoBehaviour
+    {
+        private MeshRenderer[] renderers;
+        private MaterialPropertyBlock propBlock;
+        private float fadeSpeed;
+        private float currentFade = 1f;
+
+        public void Initialize(MeshFilter[] filters, MeshRenderer[] renderers, Material afterImageMat, float duration)
+        {
+            this.renderers = renderers;
+            this.fadeSpeed = 1f / duration;
+            this.propBlock = new MaterialPropertyBlock();
+
+            foreach (var renderer in renderers)
+            {
+                if (renderer != null)
+                {
+                    renderer.sharedMaterial = afterImageMat;
+                }
+            }
+        }
+
+        private void Update()
+        {
+            currentFade -= Time.deltaTime * fadeSpeed;
+            if (currentFade <= 0f)
+            {
+                // 必须手动销毁运行时烘焙出的 Mesh 资源，防止显存泄漏 (GC 不会自动回收 BakeMesh 产生的网格)
+                foreach (var filter in GetComponentsInChildren<MeshFilter>())
+                {
+                    if (filter != null && filter.sharedMesh != null)
+                    {
+                        Destroy(filter.sharedMesh);
+                    }
+                }
+                Destroy(gameObject);
+                return;
+            }
+
+            propBlock.SetFloat("_Fade", currentFade);
+            foreach (var renderer in renderers)
+            {
+                if (renderer != null)
+                {
+                    renderer.SetPropertyBlock(propBlock);
+                }
+            }
+        }
+    }
+}