根据提供的code differences信息，由于没有具体的代码变更内容，我将生成一个通用的commit message模板：
``` docs(readme): 更新文档说明 - 添加项目使用指南 - 完善API接口说明 - 修正错误的配置示例 ``` 注意：由于您提供的code differences部分为空，以上是一个示例模板。当您有具体的代码变更时，请提供详细的变更内容以便生成更准确的commit message。
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using UnityEngine;
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using UnityEngine.UI;
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using UnityEngine.EventSystems;
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/// <summary>
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/// 英雄卡片拖动组件（布阵阶段使用）。
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/// 拖动时在场景里生成一个半透明的英雄"幽灵"跟随指针，并吸附到最近的部署格位；
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/// 松手后把该卡对应的英雄登记到格位上，卡片进入"已使用"状态。
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/// </summary>
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public class HeroCardDrag : MonoBehaviour, IBeginDragHandler, IDragHandler, IEndDragHandler
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{
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[Header("配置（由 DefenseGameFlowController 注入）")]
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public int cardIndex; // 卡片序号，0 起
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public GameObject heroPrefab; // 对应英雄 Prefab
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public CharacterData characterData; // 角色数据
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[Header("幽灵外观")]
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[Range(0.1f, 1f)] public float ghostAlpha = 0.55f;
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private Canvas canvas;
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private CanvasGroup canvasGroup;
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private GameObject ghost;
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private Material ghostHiddenMaterial;
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private bool dragging;
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private int currentCell = -1;
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private const float PlacedCardAlpha = 0.35f;
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private void Awake()
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{
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canvas = GetComponentInParent<Canvas>();
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canvasGroup = GetComponent<CanvasGroup>();
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if (canvasGroup == null)
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{
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canvasGroup = gameObject.AddComponent<CanvasGroup>();
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}
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}
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/// <summary>由流程控制器注入卡片配置。</summary>
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public void Setup(int index, GameObject prefab, CharacterData data)
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{
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cardIndex = index;
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heroPrefab = prefab;
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characterData = data;
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SetPlaced(false);
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}
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/// <summary>标记该卡是否已经放下去了（已放置的卡片变暗且不能再拖）。</summary>
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public void SetPlaced(bool placed)
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{
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if (canvasGroup != null)
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{
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canvasGroup.alpha = placed ? PlacedCardAlpha : 1f;
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}
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}
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public void OnBeginDrag(PointerEventData eventData)
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{
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var flow = DefenseGameFlowController.Instance;
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if (flow == null || !flow.IsDeployPhase) return;
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if (flow.IsCardPlaced(cardIndex)) return; // 已经放置过了
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if (heroPrefab == null) return;
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dragging = true;
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currentCell = -1;
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if (canvasGroup != null)
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{
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canvasGroup.alpha = 0.5f;
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canvasGroup.blocksRaycasts = false;
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}
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CreateGhost();
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FollowPointer(eventData.position);
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}
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public void OnDrag(PointerEventData eventData)
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{
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if (!dragging) return;
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FollowPointer(eventData.position);
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}
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public void OnEndDrag(PointerEventData eventData)
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{
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if (!dragging) return;
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dragging = false;
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if (canvasGroup != null)
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{
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canvasGroup.alpha = 1f;
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canvasGroup.blocksRaycasts = true;
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}
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if (DeployHighlight.Instance != null) DeployHighlight.Instance.Hide();
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int cell = currentCell;
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currentCell = -1;
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DestroyGhost();
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if (cell >= 0)
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{
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var flow = DefenseGameFlowController.Instance;
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if (flow != null && flow.PlaceHeroFromCard(cardIndex, cell))
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{
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SetPlaced(true);
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}
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}
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}
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// ── 幽灵 ────────────────────────────────────────────────
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private void CreateGhost()
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{
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ghost = Instantiate(heroPrefab);
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ghost.name = "Ghost_" + heroPrefab.name;
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// 只保留外观：关掉所有逻辑组件与碰撞体
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foreach (var behaviour in ghost.GetComponentsInChildren<Behaviour>(true))
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{
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if (behaviour is Animator) continue; // 保留 Animator 让它做待机动作
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behaviour.enabled = false;
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}
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foreach (var collider in ghost.GetComponentsInChildren<Collider>(true))
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{
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collider.enabled = false;
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}
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foreach (var rb in ghost.GetComponentsInChildren<Rigidbody>(true))
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{
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rb.isKinematic = true;
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rb.detectCollisions = false;
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}
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// Animator 不能带动根位移，否则幽灵会自己漂走
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foreach (var animator in ghost.GetComponentsInChildren<Animator>(true))
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{
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animator.applyRootMotion = false;
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}
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// 血条 UI 是 WorldHealthBar.Awake 生成的，幽灵不需要
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var healthBar = ghost.transform.Find("WorldHealthBar");
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if (healthBar != null)
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{
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Destroy(healthBar.gameObject);
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}
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BuildGhostMaterials();
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}
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private void BuildGhostMaterials()
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{
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if (ghostHiddenMaterial == null)
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{
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var hiddenShader = Shader.Find("Sprites/Default") ?? Shader.Find("Unlit/Color");
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ghostHiddenMaterial = new Material(hiddenShader);
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ghostHiddenMaterial.name = "GhostHidden";
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ghostHiddenMaterial.color = new Color(1f, 1f, 1f, 0f);
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}
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var bodyShader = Shader.Find("Standard");
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foreach (var renderer in ghost.GetComponentsInChildren<Renderer>(true))
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{
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var source = renderer.sharedMaterials;
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var result = new Material[source.Length];
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for (int i = 0; i < source.Length; i++)
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{
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// 第 0 个材质是本体，做成半透明；其余（描边等附加材质）隐藏掉
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if (i == 0 && source[i] != null && bodyShader != null)
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{
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result[i] = MakeTransparent(source[i], ghostAlpha, bodyShader);
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}
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else
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{
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result[i] = ghostHiddenMaterial;
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}
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}
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renderer.sharedMaterials = result;
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renderer.shadowCastingMode = UnityEngine.Rendering.ShadowCastingMode.Off;
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}
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}
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private static Material MakeTransparent(Material source, float alpha, Shader standard)
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{
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var mat = new Material(source);
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mat.name = source.name + "_Ghost";
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// 统一用 Standard 的透明混合模式，保证任何贴图都能变成半透明
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if (mat.shader != standard)
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{
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var mainTex = mat.HasProperty("_MainTex") ? mat.GetTexture("_MainTex") : null;
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var color = mat.HasProperty("_Color") ? mat.GetColor("_Color") : Color.white;
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mat.shader = standard;
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if (mainTex != null) mat.SetTexture("_MainTex", mainTex);
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mat.SetColor("_Color", color);
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}
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if (mat.HasProperty("_Mode"))
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{
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mat.SetFloat("_Mode", 3f); // Transparent
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mat.SetInt("_SrcBlend", (int)UnityEngine.Rendering.BlendMode.SrcAlpha);
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mat.SetInt("_DstBlend", (int)UnityEngine.Rendering.BlendMode.OneMinusSrcAlpha);
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mat.SetInt("_ZWrite", 0);
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mat.DisableKeyword("_ALPHATEST_ON");
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mat.EnableKeyword("_ALPHABLEND_ON");
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mat.DisableKeyword("_ALPHAPREMULTIPLY_ON");
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mat.renderQueue = 3000;
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}
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if (mat.HasProperty("_Color"))
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{
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var c = mat.GetColor("_Color");
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c.a = alpha;
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mat.SetColor("_Color", c);
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}
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return mat;
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}
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private void FollowPointer(Vector2 screenPosition)
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{
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if (ghost == null) return;
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var cam = Camera.main;
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if (cam == null) return;
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var ray = cam.ScreenPointToRay(screenPosition);
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var ground = new Plane(Vector3.up, new Vector3(0f, DeployGrid.UnitY, 0f));
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if (!ground.Raycast(ray, out float distance))
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{
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return;
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}
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Vector3 world = ray.GetPoint(distance);
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int cell = DeployGrid.SnapToCellClamped(world);
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if (cell == currentCell) return;
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currentCell = cell;
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var flow = DefenseGameFlowController.Instance;
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bool blocked = cell < 0 || (flow != null && flow.IsCellOccupied(cell));
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if (cell >= 0)
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{
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ghost.transform.position = DeployGrid.CellPosition(cell);
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if (DeployHighlight.Instance != null) DeployHighlight.Instance.Show(cell, blocked);
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}
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else
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{
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// 没吸附到格位：幽灵跟着指针但压暗提示不可放置
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ghost.transform.position = new Vector3(world.x, DeployGrid.UnitY, world.z);
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if (DeployHighlight.Instance != null) DeployHighlight.Instance.Hide();
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}
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}
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private void DestroyGhost()
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{
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if (ghost == null) return;
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foreach (var renderer in ghost.GetComponentsInChildren<Renderer>(true))
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{
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if (renderer.sharedMaterials == null) continue;
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foreach (var mat in renderer.sharedMaterials)
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{
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if (mat != null && mat != ghostHiddenMaterial) Destroy(mat);
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}
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}
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Destroy(ghost);
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ghost = null;
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}
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private void OnDisable()
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{
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if (dragging)
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{
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dragging = false;
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if (canvasGroup != null)
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{
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canvasGroup.alpha = 1f;
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canvasGroup.blocksRaycasts = true;
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}
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if (DeployHighlight.Instance != null) DeployHighlight.Instance.Hide();
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}
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DestroyGhost();
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}
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}
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