1 using UnityEngine;
2 using System.Collections;
3 /*
4 * 第三人称摄像机常用控制
5 */
6 public class CameraCS : MonoBehaviour {
7
8 private Transform player;
9 private Vector3 offsetPosition;
10 private float distance;
11 private float scrollSpeed = 10; //鼠标滚轮速度
12 private bool isRotating; //开启摄像机旋转
13 private float rotateSpeed = 2; //摄像机旋转速度
14 // Use this for initialization
15
16 void Awake(){
17 player = GameObject.FindGameObjectWithTag ("Player").transform;
18 }
19
20 void Start () {
21 //摄像机朝向player
22 transform.LookAt (player.position);
23 //获取摄像机与player的位置偏移
24 offsetPosition = transform.position - player.position;
25 }
26
27 // Update is called once per frame
28 void Update () {
29 //摄像机跟随player与player保持相对位置偏移
30 transform.position = offsetPosition + player.position;
31 //摄像机的旋转
32 RotateView ();
33 //摄像机的摄影控制
34 ScrollView ();
35 }
36
37 void ScrollView(){
38 //返回位置偏移的向量长度
39 distance = offsetPosition.magnitude;
40
41 //根据鼠标滚轮的前后移动获取变化长度
42 distance -= Input.GetAxis ("Mouse ScrollWheel") * scrollSpeed;
43
44 //限制变化长度的范围在最小为4最大为22之间
45 distance = Mathf.Clamp (distance,4,22);
46
47 //新的偏移值为偏移值的单位向量*变换长度
48 offsetPosition = offsetPosition.normalized * distance;
49
50 //打印变化长度
51 Debug.Log (distance);
52 }
53
54 void RotateView(){
55 //获取鼠标在水平方向的滑动
56 Debug.Log(Input.GetAxis ("Mouse X"));
57 //获取鼠标在垂直方向的滑动
58 Debug.Log(Input.GetAxis("Mouse Y"));
59
60 //按下鼠标右键开启旋转摄像机
61 if (Input.GetMouseButtonDown(1)) {
62 isRotating = true;
63 }
64
65 //抬起鼠标右键关闭旋转摄像机
66 if (Input.GetMouseButtonUp(1)) {
67 isRotating = false;
68 }
69
70 if (isRotating) {
71
72 //获取摄像机初始位置
73 Vector3 pos = transform.position;
74 //获取摄像机初始角度
75 Quaternion rot = transform.rotation;
76
77 //摄像机围绕player的位置延player的Y轴旋转,旋转的速度为鼠标水平滑动的速度
78 transform.RotateAround(player.position,player.up,Input.GetAxis("Mouse X") * rotateSpeed);
79
80 //摄像机围绕player的位置延自身的X轴旋转,旋转的速度为鼠标垂直滑动的速度
81 transform.RotateAround (player.position, transform.right, Input.GetAxis ("Mouse Y") * rotateSpeed);
82
83 //获取摄像机x轴向的欧拉角
84 float x = transform.eulerAngles.x;
85
86 //如果摄像机的x轴旋转角度超出范围,恢复初始位置和角度
87 if (x<10 || x>80) {
88 transform.position = pos;
89 transform.rotation = rot;
90 }
91 }
92
93 //更新摄像机与player的位置偏移
94 offsetPosition = transform.position - player.position;
95 }
96 }
