本文实例为大家分享了unity实现鼠标拖住3D物体的具体代码，供大家参考，具体内容如下

把该脚本直接挂在要拖拽的物体上即可

using System.Collections;using System.Collections.Generic;using UnityEngine;public class ModelDrages : MonoBehaviour {//发射射线的摄像机private Camera cam;//射线碰撞的物体private GameObject go;//射线碰撞物体的名字public static string btnName;private Vector3 screenSpace;private Vector3 offset;private bool isDrage = false;// Use this for initializationvoid Start (){ cam = Camera.main;}// Update is called once per frame void Update (){ //整体初始位置 Ray ray = cam.ScreenPointToRay(Input.mousePosition); //从摄像机发出到点击坐标的射线 RaycastHit hitInfo; if (isDrage == false) { if(Physics .Raycast (ray,out hitInfo)) { //划出射线 只有在Scene视图中才能看到 Debug.DrawLine(ray.origin, hitInfo.point); go = hitInfo.collider.gameObject; print(btnName); screenSpace = cam.WorldToScreenPoint(go.transform.position); offset = go.transform.position - cam.ScreenToWorldPoint(new Vector3(Input.mousePosition.x, Input.mousePosition.y, Input.mousePosition.z)); //物体的名字 btnName = go.name; //组件的名字 } else { btnName = null; } } if(Input.GetMouseButton(0)) { Vector3 currentScreenSpace = new Vector3(Input.mousePosition.x, Input.mousePosition.y, screenSpace.z); Vector3 currentPosition = cam.ScreenToWorldPoint(currentScreenSpace) + offset; if (btnName != null) { go.transform.position = currentPosition; } isDrage = true; } else { isDrage = false; } }}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。