141 lines
4.1 KiB
C#
141 lines
4.1 KiB
C#
using UnityEngine;
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using UnityEngine.EventSystems;
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using System.Collections.Generic;
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using System.Collections;
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public class Card : MonoBehaviour
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{
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private Vector3 offset; // 鼠标与卡牌之间的偏移量
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private Camera mainCamera; // 主相机
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private Vector3 originalPosition; // 卡牌的初始位置
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private bool isRaised = false; // 标记卡牌是否已经抬起
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private float raiseHeight = 0.5f; // 抬起高度
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private bool isDragging = false; // 标记是否正在拖拽
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private Plane dragPlane; // 拖拽平面
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void Start()
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{
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// 获取主相机
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mainCamera = Camera.main;
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if (mainCamera == null)
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{
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Debug.LogError("主相机未设置为 MainCamera Tag，请检查！");
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return;
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}
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// 记录卡牌初始位置
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originalPosition = transform.position;
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}
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void OnMouseDown()
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{
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if (mainCamera == null) return;
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// 检测是否点击在 UI 上
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if (IsPointerOverUIObject())
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{
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Debug.Log("点击在 UI 上，忽略卡牌拖动");
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return;
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}
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// 定义拖拽平面：平面法向量为 Vector3.up（与 Y 轴平行），高度为卡牌的当前 Y 值
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dragPlane = new Plane(Vector3.up, transform.position);
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// 使用鼠标射线计算点击点与卡牌的偏移
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Ray ray = mainCamera.ScreenPointToRay(Input.mousePosition);
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if (dragPlane.Raycast(ray, out float enter))
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{
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Vector3 hitPoint = ray.GetPoint(enter); // 鼠标点击点的世界坐标
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offset = transform.position - hitPoint; // 计算偏移
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Debug.Log("点击点与卡牌的偏移：" + offset);
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}
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else
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{
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Debug.LogError("鼠标射线未与拖拽平面相交");
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return;
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}
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// 抬起卡牌
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if (!isRaised)
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{
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isRaised = true;
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StopAllCoroutines(); // 停止所有协程
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StartCoroutine(MoveToPosition(transform.position + new Vector3(0, raiseHeight, 0), 0.2f)); // 平滑抬起
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}
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isDragging = true; // 开始拖拽
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}
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void OnMouseDrag()
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{
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if (!isDragging || mainCamera == null) return;
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// 使用拖拽平面计算鼠标的世界位置
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Ray ray = mainCamera.ScreenPointToRay(Input.mousePosition);
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if (dragPlane.Raycast(ray, out float enter))
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{
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Vector3 hitPoint = ray.GetPoint(enter); // 鼠标光线与平面的交点
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transform.position = new Vector3(hitPoint.x + offset.x, originalPosition.y, hitPoint.z + offset.z); // 固定 Y 值
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Debug.Log("拖拽中卡牌位置：" + transform.position);
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}
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else
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{
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Debug.LogError("鼠标射线未与拖拽平面相交");
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}
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}
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void OnMouseUp()
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{
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if (!isDragging) return;
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isDragging = false;
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// 放下卡牌
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if (isRaised)
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{
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isRaised = false;
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StopAllCoroutines();
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StartCoroutine(MoveToPosition(new Vector3(transform.position.x, originalPosition.y, transform.position.z), 0.2f)); // 平滑放下
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}
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Debug.Log("卡牌拖拽结束，位置：" + transform.position);
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}
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// 平滑移动协程
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private IEnumerator MoveToPosition(Vector3 targetPosition, float duration)
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{
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Vector3 startPosition = transform.position;
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float time = 0f;
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while (time < duration)
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{
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time += Time.deltaTime;
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transform.position = Vector3.Lerp(startPosition, targetPosition, time / duration);
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yield return null;
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}
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transform.position = targetPosition; // 确保最终位置
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}
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// 检测鼠标是否点击在 UI 上
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private bool IsPointerOverUIObject()
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{
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// 检查是否存在 EventSystem
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if (EventSystem.current == null)
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{
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Debug.LogWarning("场景中缺少 EventSystem，请添加一个 EventSystem！");
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return false;
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}
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// 检测鼠标是否点击在 UI 上
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PointerEventData eventData = new PointerEventData(EventSystem.current)
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{
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position = Input.mousePosition
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};
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List<RaycastResult> results = new List<RaycastResult>();
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EventSystem.current.RaycastAll(eventData, results);
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return results.Count > 0;
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}
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}
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