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 initializationvoid Start(){}// Update is called once per framevoid 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 initializationvoid Start(){rigidbody = this.GetComponent<Rigidbody>();controller = this.GetComponent<CharacterController>();}//Move// Update is called once per framevoid Update(){//Moveif (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 framepublic 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 framevoid 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。
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