79 lines
2.2 KiB
C#
79 lines
2.2 KiB
C#
using System.Collections.Generic;
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using UnityEngine;
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using UnityEngine.EventSystems;
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using UnityEngine.UI;
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public class ToolDragSpawner : MonoBehaviour,
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IPointerDownHandler, IDragHandler, IPointerUpHandler
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{
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public GameObject dragGhostPrefab;
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public Transform dragLayer;
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private GameObject ghost;
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private RectTransform ghostRect;
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private RectTransform selfRect;
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public void OnPointerDown(PointerEventData eventData)
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{
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// 创建影子
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ghost = Instantiate(dragGhostPrefab, dragLayer);
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// 同步图片
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Image src = GetComponent<Image>();
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Image dst = ghost.GetComponent<Image>();
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ghostRect = ghost.transform as RectTransform;
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selfRect=transform.GetComponent<RectTransform>();
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dst.sprite = src.sprite;
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SyncRectTransform(selfRect, ghostRect);
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ghost.transform.position = eventData.position;
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}
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public void OnDrag(PointerEventData eventData)
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{
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if (ghost != null)
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ghost.transform.position = eventData.position;
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}
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public void OnPointerUp(PointerEventData eventData)
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{
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// 抬起事件（重点）
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HandleDrop(eventData);
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Destroy(ghost);
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}
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void SyncRectTransform(RectTransform src, RectTransform dst)
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{
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dst.anchorMin = src.anchorMin;
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dst.anchorMax = src.anchorMax;
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dst.pivot = src.pivot;
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dst.sizeDelta = src.sizeDelta;
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dst.localScale = Vector3.one; // 防止父节点缩放干扰
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}
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void HandleDrop(PointerEventData eventData)
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{
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// UI 命中检测
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if (IsClickUI())
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{
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Debug.Log("在UI上抬起");
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}
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else
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{
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Debug.Log("拖拽到非UI区域");
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// 👉 在这里生成3D模型
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}
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}
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private bool IsClickUI()
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{
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PointerEventData eventData = new PointerEventData(EventSystem.current);
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eventData.position = new Vector2(Input.mousePosition.x, Input.mousePosition.y);
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List<RaycastResult> raycastResults = new List<RaycastResult>();
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EventSystem.current.RaycastAll(eventData, raycastResults);
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return raycastResults.Count > 0;
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}
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}
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