Unity 3D建筑内部第一人称漫游，房间切换漫游

在Unity中经常用到第一人称漫游，比较常用的是用Unity Assets中导入的Charaters包，里面包含第一人称控制器和第三人称控制器，将第一人称控制器拖入场景中就可以用AWSD实现前后左右移动，控制器自带脚步声音效，在一些游戏场景中经常使用。


但是如果需要在场景中来回切换位置，第一人称似乎比较难实现，比如我们经常看到的VR看房中的样板间展示，点击房间的缩略图就会进入到该房间进行漫游，要实现这种效果，我采用的是在场景中布置了多个摄像机，放在合适的位置。

接着给这几个摄像机和鼠标添加移动的脚本，实现按AWSD可以前后左右移动，移动鼠标可以实现画面旋转查看。
新建Mouselook脚本

using System.Collections;
using System.Collections.Generic;
using UnityEngine;


public class Mouselook : MonoBehaviour
{
    public enum RotationAxes
    {
        MouseXAndY = 0,
        MouseX = 1,
        MouseY = 2
    }
    public RotationAxes axes = RotationAxes.MouseXAndY;
    public float sensitivityHor = 1f;
    public float sensitivityVert = 1f;

    public float minmumVert = -45f;
    public float maxmumVert = 45f;

    private float _rotationX = 0;
    // Use this for initialization
    void Start()
    {

    }

    // Update is called once per frame
    void Update()
    {
        if (axes == RotationAxes.MouseX)
        {
            transform.Rotate(0, Input.GetAxis("Mouse X") * sensitivityHor, 0);
        }
        else if (axes == RotationAxes.MouseY)
        {
            _rotationX = _rotationX - Input.GetAxis("Mouse Y") * sensitivityVert;
            _rotationX = Mathf.Clamp(_rotationX, minmumVert, maxmumVert);

            float rotationY = transform.localEulerAngles.y;

            transform.localEulerAngles = new Vector3(-_rotationX, rotationY, 0);
        }
        else
        {
            _rotationX -= Input.GetAxis("Mouse Y") * sensitivityVert;
            _rotationX = Mathf.Clamp(_rotationX, minmumVert, maxmumVert);

            float delta = Input.GetAxis("Mouse X") * sensitivityHor;
            float rotationY = transform.localEulerAngles.y + delta;

            transform.localEulerAngles = new Vector3(-_rotationX, rotationY, 0);
        }

    }
}

新建move脚本

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class move : MonoBehaviour {

    public CharacterController controller;
    public Rigidbody rigidbody;
    public float speed = 1;

    // Use this for initialization
    void Start()
    {
        rigidbody = this.GetComponent<Rigidbody>();
        controller = this.GetComponent<CharacterController>();
    }

    //Move


    // Update is called once per frame
    void Update()
    {
        //Move
        if (Input.GetKey("a"))
            controller.SimpleMove(transform.right * -speed);
        if (Input.GetKey("d"))
            controller.SimpleMove(transform.right * speed);
        if (Input.GetKey("w"))
            controller.SimpleMove(transform.forward * speed);
        if (Input.GetKey("s"))
            controller.SimpleMove(transform.forward * -speed);
    }

}

把脚本挂在摄像机上，并添加Rigidbody组件和Charcter Controller组件，在move组件中选择对应的摄像机的controller和rigidbody。

接下来是实现各个相机之间的跳转，新建一个空物体来控制切换，我这里是GameObject。将下面两个脚本都挂在空物体从camera_1跳转camera_0

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Camerachange2 : MonoBehaviour
{

    public GameObject camera_0;
    public GameObject camera_1;
    private Vector3 CameraOriginalPosition2;//摄像机2的初始位置
    public IEnumerator Start()
    {
        yield return new WaitForSeconds(0.1F);
        camera_1.SetActive(true);
        camera_0.SetActive(false);
        //记录摄像机2的原始位置

        CameraOriginalPosition2 = new Vector3(camera_1.transform.localPosition.x, camera_1.transform.localPosition.y, camera_1.transform.localPosition.z);
        print("摄像机2的原始位置的X=" + CameraOriginalPosition2.x);
        print("摄像机2的原始位置的Y=" + CameraOriginalPosition2.y);
        print("摄像机2的原始位置的Z=" + CameraOriginalPosition2.z);
    }


    // Update is called once per frame
    public void change1()
    {
        camera_1.SetActive(false);
        camera_0.SetActive(true);
        camera_1.transform.position = CameraOriginalPosition2;
    }
}

新建脚本从camera_0跳转camera_1:

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Camerachange : MonoBehaviour {

    public GameObject camera_0;//设置成public可以使unity中出现如下图所示的
    public GameObject camera_1;
    private Vector3 CameraOriginalPosition; //摄像机1的原始位置
   
    public IEnumerator Start()
    {
        yield return new WaitForSeconds(0.1F);
        camera_1.SetActive(false);
        camera_0.SetActive(true);
        //记录摄像机1的原始位置

        CameraOriginalPosition = new Vector3(camera_0.transform.localPosition.x, camera_0.transform.localPosition.y, camera_0.transform.localPosition.z);
            print("摄像机1的原始位置的X=" + CameraOriginalPosition.x);
            print("摄像机1的原始位置的Y=" + CameraOriginalPosition.y);
            print("摄像机1的原始位置的Z=" + CameraOriginalPosition.z);
           
        
 
        
    }
    public void change()
    {
        camera_0.SetActive(false);
        camera_1.SetActive(true);
        camera_0.transform.position = CameraOriginalPosition;
    }
  
   
    // Update is called once per frame
    void Update () {
		
	}
}

上述代码可以实现每次跳转漫游之后都能后相机回到初始位置

然后添加按钮实现点击跳转。为按钮增加点击事件。