using UnityEngine;using System.Collections;public class DragAndDrog : MonoBehaviour {
private GameObject target;
private bool isMouseDrag;
private Vector3 screenPosition;
private Vector3 offset;// Use this for initialization
void Start () {
}
// Update is called once per frame
void Update () {
GameObjectDragAndDrog();
}
//任意拖拽 private GameObject ReturnGameObjectDrag(out RaycastHit hit) {
target = null;
Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
if (Physics.Raycast(ray.origin, ray.direction * 10, out hit))
{
target = hit.collider.gameObject;
}
return target;
}
//拖拽Updata private void GameObjectDragAndDrog() {
if (Input.GetMouseButtonDown (0))
{
RaycastHit hitInfo;
target = ReturnGameObjectDrag(out hitInfo);
if (target != null)
{
isMouseDrag = true;
screenPosition = Camera.main.WorldToScreenPoint(target.transform.position);
offset = target.transform.position - Camera.main.ScreenToWorldPoint(new Vector3(Input.mousePosition.x, Input.mousePosition.y, screenPosition.z));
}
}
if (Input.GetMouseButtonUp(0))
{
isMouseDrag = false;
}
if (isMouseDrag)
{
Vector3 currentScreenSpace = new Vector3(Input.mousePosition.x, Input.mousePosition.y, screenPosition.z);
Vector3 currentPosition = Camera.main.ScreenToWorldPoint(currentScreenSpace) + offset;
target.transform.localPosition = new Vector3(currentPosition.x, currentPosition.y, currentPosition.z);
}
}
}
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