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35 lines
1.4 KiB
35 lines
1.4 KiB
1 year ago
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using UnityEngine;
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using System.Collections;
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using UnityEngine.EventSystems;
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public class DragObject : MonoBehaviour {
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public bool isDrag=true;
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private Vector3 realPosition;
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IEnumerator OnMouseDown()
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{
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if (isDrag)
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{
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Vector3 screenSpace = Camera.main.WorldToScreenPoint(transform.position);//三维物体坐标转屏幕坐标
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//将鼠标屏幕坐标转为三维坐标，再算出物体位置与鼠标之间的距离
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Vector3 offset = transform.position - Camera.main.ScreenToWorldPoint(new Vector3(Input.mousePosition.x, Input.mousePosition.y, screenSpace.z));
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while (Input.GetMouseButton(0))
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{
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Vector3 curScreenSpace = new Vector3(Input.mousePosition.x, Input.mousePosition.y, screenSpace.z);
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Vector3 curPosition = Camera.main.ScreenToWorldPoint(curScreenSpace) + offset;
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realPosition = new Vector3(curPosition.x, transform.position.y, curPosition.z);
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if (Input.GetKey(KeyCode.LeftControl))
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realPosition = new Vector3(transform.position.x, curPosition.y, transform.position.z);
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if (!EventSystem.current.IsPointerOverGameObject())
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transform.position = realPosition;
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yield return 0;//这个很重要，循环执行
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}
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}
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}
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}
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