Unity 拖拽3D物体到固定位置

àì夳堔傛蜴生んèń 2022-04-12 02:48 659阅读 0赞

Unity 拖拽3D物体到目标位置大体思路

1.监听鼠标的落下 拖拽 和松开  可以使用OnMouseDown  OnMouseDrag  OnMouseUp

2 设定目标地点 高亮显示 （使用了高亮插件）

3 拖拽物体跟随鼠标移动  在OnMouseDrag中使用 this.transform.position = new Vector3(hit.point.x, hit.point.y + height, hit.point.z);

是物体一直跟随在鼠标

上代码

using System.Collections;
    using System.Collections.Generic;
    using UnityEngine;
    
    public class MoveCube : MonoBehaviour
    {
        public LayerMask layerMask;//鼠标射线可移动的范围
        public Camera cam;//摄像机
        public Transform oldTrans;     //物体原来的位置
        public float moveTime;
        public float height;//移动物体距离鼠标的高度
    
        private Ray ray;
        private RaycastHit hit;
        void Start()
        {
    
        }
    
        //鼠标落下
        void OnMouseDown()
        {
            AwakeMove();
            //高亮目标地点
            HightOpen(this.gameObject.name);
        }
        //开始拖拽
        void OnMouseDrag()
        {
            StartMove();
        }
        //鼠标松开
        void OnMouseUp()
        {
            IsArrive();
            HightClose(this.gameObject.name);
        }
        public void AwakeMove()
        {
            StopAllCoroutines();
        }
        public void StartMove()
        {
            ray = cam.ScreenPointToRay(Input.mousePosition);
            if (Physics.Raycast(ray, out hit, 100, layerMask.value))
            {
                if (hit.collider.tag == "hightGameObject")//碰触目标物体
                {
                    if (hit.collider.name == "离心杯")
                    {
                        this.gameObject.transform.position = hit.transform.position;
                    }
                }
                else
                {
                    this.transform.position = new Vector3(hit.point.x, hit.point.y + height, hit.point.z);
                }
            }
        }
    
        /// <summary>
        /// 目标物体高亮
        /// </summary>
        /// <param name="name"></param>
        public void HightOpen(string name)
        {
            GameObject go = GameObject.Find("高亮物体_任务二").transform.Find(name).gameObject;
            go.SetActive(true);
            go.GetComponent<HighlightableObject>().FlashingOn(Color.green, new Color(0, 0, 0, 0));
        }
        /// <summary>
        /// 关掉目标物体高亮
        /// </summary>
        /// <param name="name"></param>
        public void HightClose(string name)
        {
            GameObject go = GameObject.Find("高亮物体_任务二").transform.Find(name).gameObject;
            go.SetActive(false);
            go.GetComponent<HighlightableObject>().FlashingOff();
        }
    
        /// <summary>
        /// 返回原位置
        /// </summary>
        public void ReturnHomePosition()
        {
            if (this.gameObject.name == "离心杯")
            {
                this.gameObject.transform.position = oldTrans.position;
                Debug.Log("返回原来位置");
            }
        }
    
        /// <summary>
        /// 判断是否到达目的点
        /// </summary>
        public void IsArrive()
        {
            ray = cam.ScreenPointToRay(Input.mousePosition);
            if (Physics.Raycast(ray, out hit, 100, layerMask.value))
            {
                if (hit.collider.tag != "hightGameObject")
                {
                    ReturnHomePosition();
                }
            }
            else
            {
                ReturnHomePosition();
            }
        }
    }

整体项目文件：链接：https://pan.baidu.com/s/1QhnedhlsC823FlAKtnkIew   
提取码：3xkk

高亮物体插件：链接：https://pan.baidu.com/s/1sLhT7g26T9CetuoSYKRf4w   
提取码：26hb