转载请加上地址便于纠错 http://www.cnblogs.com/JeroChan/
学习了siki的黑暗之光，在学习老师的实现代码之余自己网上还查找了其他的实现方法，为了以后项目方便自己独立封装了旋转、拉伸的方法，使耦合度尽量降低。
定义
private GameObject playerObject;private Camera cameraObject;private Vector3 offSetPos; //偏移（相机与目标的差）public float fieldViewMax = 90f; //拉伸距离最远距离public float fieldViewMin = 10f; //拉伸距离最近距离public float scrollSpeed = 40f; //拉伸速度public float rotateSpeed = 10f; //旋转速度private bool isRotate = false; //旋转状态标识符
跟随及主代码
使用LateUpdate控制相机，在Update处理完角色逻辑后LateUpdate处理相机逻辑，防止相机跟丢角色。
void Start () {
cameraObject = this.GetComponent<Camera>();
playerObject = GameObject.FindGameObjectWithTag("Player");
offSetPos = this.transform.position - playerObject.transform.position;
transform.LookAt(playerObject.transform);
}
void LateUpdate ()
{
//相机跟随(使用固定偏移方法)
this.transform.position = offSetPos + playerObject.transform.position; //视野拉伸(使用Camera.fieldOfView方法) ScrollOfView(cameraObject,fieldViewMin, fieldViewMax, scrollSpeed); //视野旋转(使用Transform.RotateAround方法) RotateOfView(cameraObject.transform, playerObject.transform,ref offSetPos,ref isRotate,rotateSpeed); }
相机视野拉伸代码
滚轮控制相机视野拉伸(挂载相机上)
_camera ---->相机
_fieldViewMin ---->最近视野
_fieldViewMax ---->最大视野
_scrollSpeed ---->拉伸速度（默认40）
void ScrollOfView(Camera _camera, float _fieldViewMin, float _fieldViewMax,float _scrollSpeed=40)
{
_camera.fieldOfView -= Input.GetAxis("Mouse ScrollWheel") * _scrollSpeed;
_camera.fieldOfView = Mathf.Clamp(_camera.fieldOfView, _fieldViewMin, _fieldViewMax);
}
相机视野旋转代码
右键拖动旋转视野(挂载相机上)
_cameraTransform ---->相机的transform
_targetTransform ---->目标的transform
_offSetPos ---->相机与目标的偏移位置(可传递)
_isRotate ---->旋转状态标识符(可专递)
_rotateSpeed ---->旋转速度(默认为10)
void RotateOfView(Transform _cameraTransform, Transform _targetTransform,ref Vector3 _offSetPos,ref bool _isRotate,float _rotateSpeed=10)
{
//当鼠标右键按下切换旋转状态，抬起表示结束旋转状态
if (Input.GetMouseButtonDown(1))
_isRotate = true;
if (Input.GetMouseButtonUp(1))
_isRotate = false;
//旋转状态
if (_isRotate) { Vector3 originalPosition = _cameraTransform.position; Quaternion originalRotation = _cameraTransform.rotation; _cameraTransform.RotateAround(_targetTransform.position, _targetTransform.up, _rotateSpeed * Input.GetAxis("Mouse X")); _cameraTransform.RotateAround(_targetTransform.position, _cameraTransform.right, -_rotateSpeed * Input.GetAxis("Mouse Y")); //限制上下旋转角度 if (_cameraTransform.eulerAngles.x > 80 || _cameraTransform.eulerAngles.x < 10) { _cameraTransform.position = originalPosition; _cameraTransform.rotation = originalRotation; } //更新偏移 _offSetPos = _cameraTransform.position - _targetTransform.position; } }
函数写的相对直观，就不多做笔记表明了，欢迎大神有更好的方法请指教。
最后附上PlayerFollow.cs源码
1 using System.Collections;
2 using System.Collections.Generic;
3 using UnityEngine;
4
5 public class FollowPlayer : MonoBehaviour {
6
7
8 private GameObject playerObject;
9 private Camera cameraObject;
10 private Vector3 offSetPos;
//偏移（相机与目标的差）
11 public float fieldViewMax = 90f;
//拉伸距离最远距离
12 public float fieldViewMin = 10f;
//拉伸距离最近距离
13 public float scrollSpeed = 40f;
//拉伸速度
14 public float rotateSpeed = 10f;
//旋转速度
15 private bool isRotate =
false;
//旋转状态标识符
16
17
18 void Start () {
19
20 cameraObject =
this.GetComponent<Camera>
();
21 playerObject = GameObject.FindGameObjectWithTag(
"Player");
22 offSetPos =
this.transform.position -
playerObject.transform.position;
23 transform.LookAt(playerObject.transform);
24 }
25
26
27 void LateUpdate ()
28 {
29 //相机跟随(使用固定偏移方法)
30 this.transform.position = offSetPos +
playerObject.transform.position;
31 //视野拉伸(使用Camera.fieldOfView方法)
32 ScrollOfView(cameraObject,fieldViewMin, fieldViewMax, scrollSpeed);
33 //视野旋转(使用Transform.RotateAround方法)
34 RotateOfView(cameraObject.transform, playerObject.transform,
ref offSetPos,
ref isRotate,rotateSpeed);
35 }
36
37
38
39
40
41 /// <summary>
42 /// 滚轮控制相机视野拉伸(挂载相机上)
43 /// </summary>
44 /// <param name="_camera">相机</param>
45 /// <param name="_fieldViewMin">最近视野</param>
46 /// <param name="_fieldViewMax">最大视野</param>
47 /// <param name="_scrollSpeed">拉伸速度（默认40）</param>
48 void ScrollOfView(Camera _camera,
float _fieldViewMin,
float _fieldViewMax,
float _scrollSpeed=
40)
49 {
50 _camera.fieldOfView -= Input.GetAxis(
"Mouse ScrollWheel") *
_scrollSpeed;
51 _camera.fieldOfView =
Mathf.Clamp(_camera.fieldOfView, _fieldViewMin, _fieldViewMax);
52 }
53
54
55
56
57 /// <summary>
58 /// 右键拖动旋转视野(挂载相机上)
59 /// </summary>
60 /// <param name="_cameraTransform">相机的transform</param>
61 /// <param name="_targetTransform">目标的transform</param>
62 /// <param name="_offSetPos">相机与目标的偏移位置(可传递)</param>
63 /// <param name="_isRotate">旋转状态标识符(可专递)</param>
64 /// <param name="_rotateSpeed">旋转速度(默认为10)</param>
65 void RotateOfView(Transform _cameraTransform, Transform _targetTransform,
ref Vector3 _offSetPos,
ref bool _isRotate,
float _rotateSpeed=
10)
66 {
67 //当鼠标右键按下切换旋转状态，抬起表示结束旋转状态
68 if (Input.GetMouseButtonDown(
1))
69 _isRotate =
true;
70 if (Input.GetMouseButtonUp(
1))
71 _isRotate =
false;
72 //旋转状态
73 if (_isRotate)
74 {
75 Vector3 originalPosition =
_cameraTransform.position;
76 Quaternion originalRotation =
_cameraTransform.rotation;
77 _cameraTransform.RotateAround(_targetTransform.position, _targetTransform.up, _rotateSpeed * Input.GetAxis(
"Mouse X"));
78 _cameraTransform.RotateAround(_targetTransform.position, _cameraTransform.right, -_rotateSpeed * Input.GetAxis(
"Mouse Y"));
79 //限制上下旋转角度
80 if (_cameraTransform.eulerAngles.x >
80 || _cameraTransform.eulerAngles.x <
10)
81 {
82 _cameraTransform.position =
originalPosition;
83 _cameraTransform.rotation =
originalRotation;
84 }
85 //更新偏移
86 _offSetPos = _cameraTransform.position -
_targetTransform.position;
87 }
88 }
89
90 }
PlayerFollow.cs
转载于:https://www.cnblogs.com/JeroChan/p/7810197.html
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