【Unity3D】使用鼠标键盘控制Camera视角（即时战略类游戏视角）：缩进，拉远，旋转

 1 using UnityEngine;
 2 using System.Collections;
 3 
 4 public class CameraController : MonoBehaviour {
 5 
 6 
 7     public float near = 20.0f;
 8     public float far = 100.0f;
 9 
10     public float sensitivityX = 10f;
11     public float sensitivityY = 10f;
12     public float sensitivetyZ = 2f;
13     public float sensitivetyMove = 2f;
14     public float sensitivetyMouseWheel = 2f;
15 
16 
17     void Update () {
18         // 滚轮实现镜头缩进和拉远
19         if (Input.GetAxis("Mouse ScrollWheel") != 0)
20         {
21             this.camera.fieldOfView =this.camera.fieldOfView - Input.GetAxis("Mouse ScrollWheel")*sensitivetyMouseWheel;
22             this.camera.fieldOfView = Mathf.Clamp(this.camera.fieldOfView, near, far);
23         }
24         //鼠标右键实现视角转动，类似第一人称视角
25         if (Input.GetMouseButton(1))
26         { 
27             float rotationX = Input.GetAxis("Mouse X") * sensitivityX;
28             float rotationY = Input.GetAxis("Mouse Y") * sensitivityY;
29             transform.Rotate(-rotationY, rotationX, 0);            
30         }
31 
32         //键盘按钮←和→实现视角水平旋转
33         if (Input.GetAxis("Horizontal")!=0)
34         {
35             float rotationZ=Input.GetAxis("Horizontal") * sensitivetyZ;
36             transform.Rotate(0, 0, rotationZ); 
37         }
38     }
39 }