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185
unity/Assets/eco/EchoOutlineManager.cs
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185
unity/Assets/eco/EchoOutlineManager.cs
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using UnityEngine;
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namespace IndianOceanAssets.Engine2_5D
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{
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/// <summary>
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/// 描边管理器 —— 自动为场景中所有 SpriteRenderer（排除挂载 LightSource 的物体）
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/// 创建一个使用 SpriteEchoOutline shader 的子物体，用于回声描边效果。
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///
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/// 为什么需要子物体：
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/// - 精灵本体用原始材质（如 SpriteShader.shadergraph）渲染，在黑暗遮罩之下 → 黑暗中不可见
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/// - 描边用 SpriteEchoOutline 材质渲染，队列在黑暗遮罩之上（Transparent+200）→ 黑暗中可见
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/// - 同一个 SpriteRenderer 只能有一个材质，所以用子物体承载描边材质
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///
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/// 使用方式：
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/// 1. 场景中创建空物体，挂上此脚本
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/// 2. 把使用 SpriteEchoOutline shader 的材质拖到 outlineMaterial 字段
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/// 3. 运行后自动为每个非光源精灵生成描边子物体
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/// 4. 场景中新增精灵后可右键组件 > Refresh Outlines 重新扫描
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/// </summary>
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public class EchoOutlineManager : MonoBehaviour
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{
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[Header("描边材质（使用 SpriteEchoOutline shader）")]
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[SerializeField] private Material outlineMaterial;
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[Header("过滤")]
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[Tooltip("只处理这些层的精灵（默认 Everything）")]
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[SerializeField] private LayerMask includeLayers = ~0;
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[Tooltip("勾选后，挂载 LightSource 的物体（含父级）不生成描边")]
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[SerializeField] private bool skipLightSources = true;
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private static readonly int EchoIntensityID = Shader.PropertyToID("_EchoOutlineIntensity");
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private static readonly int OutlineColorID = Shader.PropertyToID("_OutlineColor");
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private static readonly int OutlineWidthID = Shader.PropertyToID("_OutlineWidth");
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private static readonly int MainTexID = Shader.PropertyToID("_MainTex");
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private readonly System.Collections.Generic.List<SpriteRenderer> _parentRenderers
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= new System.Collections.Generic.List<SpriteRenderer>();
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private readonly System.Collections.Generic.List<SpriteRenderer> _outlineRenderers
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= new System.Collections.Generic.List<SpriteRenderer>();
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private bool _renderersEnabled = false;
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private void Start()
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{
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RefreshList();
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}
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/// <summary>
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/// 重新扫描场景，为符合条件的精灵创建描边子物体。
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/// 场景中新增精灵后可调用（也有右键菜单）。
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/// </summary>
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[ContextMenu("Refresh Outlines")]
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public void RefreshList()
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{
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ClearOutlines();
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var all = FindObjectsByType<SpriteRenderer>(FindObjectsSortMode.None);
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foreach (var sr in all)
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{
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if (sr == null) continue;
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if ((includeLayers.value & (1 << sr.gameObject.layer)) == 0) continue;
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if (skipLightSources && sr.GetComponentInParent<LightSource>() != null) continue;
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// 跳过已经是描边子物体的（避免重复）。用 sharedMaterial 避免实例化父级材质
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if (sr.sharedMaterial != null && sr.sharedMaterial.shader != null
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&& sr.sharedMaterial.shader.name == "IndianOcean/SpriteEchoOutline")
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continue;
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// 读取自定义描边覆盖（颜色/宽度/禁用）
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var colorOverride = sr.GetComponentInParent<EchoOutlineColorOverride>();
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if (colorOverride != null && colorOverride.disableOutline) continue;
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CreateOutlineChild(sr, colorOverride);
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}
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_renderersEnabled = false;
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UpdateRendererEnabled();
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}
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private void CreateOutlineChild(SpriteRenderer parent, EchoOutlineColorOverride colorOverride)
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{
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var child = new GameObject($"EchoOutline_{parent.gameObject.name}");
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child.transform.SetParent(parent.transform, false);
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child.transform.localPosition = Vector3.zero;
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child.transform.localRotation = Quaternion.identity;
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child.transform.localScale = Vector3.one;
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var cr = child.AddComponent<SpriteRenderer>();
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cr.sprite = parent.sprite;
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cr.color = Color.white;
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cr.flipX = parent.flipX;
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cr.flipY = parent.flipY;
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// 有自定义颜色/宽度时创建材质实例；否则共享材质
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if (colorOverride != null)
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{
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// 用材质实例而非 MPB：MPB 会干扰 SpriteRenderer 的 _MainTex 自动绑定，
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// 导致 shader 采样到白色贴图 → alpha=1 → 描边公式算出 0 → 描边消失
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var mat = new Material(outlineMaterial);
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mat.SetColor(OutlineColorID, colorOverride.outlineColor);
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if (colorOverride.outlineWidth >= 0f)
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mat.SetFloat(OutlineWidthID, colorOverride.outlineWidth);
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if (parent.sprite != null)
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mat.SetTexture(MainTexID, parent.sprite.texture);
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cr.sharedMaterial = mat;
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}
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else
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{
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cr.sharedMaterial = outlineMaterial;
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}
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cr.sortingLayerID = parent.sortingLayerID;
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cr.sortingOrder = parent.sortingOrder + 1;
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cr.enabled = false; // 默认关闭，回声激活时再开
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_parentRenderers.Add(parent);
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_outlineRenderers.Add(cr);
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}
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private void Update()
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{
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// 回声不活跃时关闭所有描边渲染器（省 draw call）
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UpdateRendererEnabled();
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// 同步精灵帧（动画）、翻转、排序
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if (!_renderersEnabled) return;
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for (int i = 0; i < _outlineRenderers.Count; i++)
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{
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var cr = _outlineRenderers[i];
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var pr = _parentRenderers[i];
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if (pr == null || cr == null) continue;
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if (cr.sprite != pr.sprite)
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{
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cr.sprite = pr.sprite;
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// 有自定义材质实例时同步纹理（共享材质由 SpriteRenderer 自动绑定）
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var mat = cr.sharedMaterial;
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if (mat != null && mat != outlineMaterial && pr.sprite != null)
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mat.SetTexture(MainTexID, pr.sprite.texture);
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}
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if (cr.flipX != pr.flipX) cr.flipX = pr.flipX;
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if (cr.flipY != pr.flipY) cr.flipY = pr.flipY;
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if (cr.sortingLayerID != pr.sortingLayerID) cr.sortingLayerID = pr.sortingLayerID;
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if (cr.sortingOrder != pr.sortingOrder + 1) cr.sortingOrder = pr.sortingOrder + 1;
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}
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}
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private void UpdateRendererEnabled()
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{
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float intensity = Shader.GetGlobalFloat(EchoIntensityID);
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bool shouldEnable = intensity > 0.01f;
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if (shouldEnable == _renderersEnabled) return;
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_renderersEnabled = shouldEnable;
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for (int i = 0; i < _outlineRenderers.Count; i++)
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{
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if (_outlineRenderers[i] != null)
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_outlineRenderers[i].enabled = shouldEnable;
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}
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}
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private void ClearOutlines()
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{
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for (int i = 0; i < _outlineRenderers.Count; i++)
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{
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if (_outlineRenderers[i] != null)
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{
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// 清理自定义材质实例（共享材质 outlineMaterial 不销毁）
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var mat = _outlineRenderers[i].sharedMaterial;
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if (mat != null && mat != outlineMaterial)
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Destroy(mat);
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Destroy(_outlineRenderers[i].gameObject);
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}
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}
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_parentRenderers.Clear();
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_outlineRenderers.Clear();
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}
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private void OnDestroy()
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{
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ClearOutlines();
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}
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}
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}
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