今天不是很忙，研究了一下拖拽GameObject移動到任意位置，沿x軸和z軸移動,其他的也就不說了，上代碼：
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);
}
}
}
本腳本可以加載任意一個對象GameObject，場景中所有帶Collider的對象，當鼠標點擊拖動時候都可以沿x和z軸拖動。之前，都是要拖動那個GameObject就會寫一個腳本掛在上面，今天實現了不用每一個要拖動的GameObject都掛載腳本，也不用將移動的GameObject賦給某個變量。