【unity3D】鼠标控制camera的移动、放大（俯视浏览效果、LOL摄像机移动效果）

在Unity开发中，用鼠标滚轮来实现摄像机的视野范围，鼠标左键拖拉控制摄像机的移动，代码如下：

 1.俯视浏览效果

 1 using UnityEngine;

 2 using System.Collections;

 3 

 4 public class CameraCol : MonoBehaviour {

 5     //控制视野缩放的速率

 6     public float view_value;

 7     //控制摄像机移动的速率

 8     public float move_speed;

 9     void Update () {

10         //放大、缩小

11         if( Input.GetAxis("Mouse ScrollWheel") != 0 )

12         {

13             this.gameObject.transform.Translate(new Vector3(0,0,Input.GetAxis("Mouse ScrollWheel")*Time.deltaTime*view_value));

14         }

15         //移动视角

16         if (Input.GetMouseButton (2)) {

17             transform.Translate (Vector3.left * Input.GetAxis ("Mouse X") * move_speed);

18             transform.Translate(Vector3.up * Input.GetAxis("Mouse Y") * -move_speed);

19         }

20     }

21 }

 2.LOL摄像机效果

　　鼠标移至屏幕边控向相应位置移动

 1 //整体移动速度

 2 var speed=5; 

 3 

 4 //关于鼠标滑轮的参数

 5 var MouseWheelSensitivity = 0.0001f; 

 6 var MouseZoomMin = -2.4f; 

 7 var MouseZoomMax = 1.0f;

 8 var normalDistance = -1.1; 

 9 

10 //水平和垂直的移动速度

11 var horizontalMoveSpeed = 0.1; 

12 var verticalMoveSpeed = 0.1; 

13 

14 //上左下右的标记

15 var topTag = 8; 

16 var leftTag = 4; 

17 var botTag = 2; 

18 var rightTag = 1;

19 

20 function Start () {

21     

22 }

23 

24 function Update () {

25     if( Input.GetAxis("Mouse ScrollWheel") != 0 )

26         {

27             this.gameObject.transform.Translate(new Vector3(0,0,Input.GetAxis("Mouse ScrollWheel")*Time.deltaTime*500));

28         }

29     //获取cursor坐标

30     var msPos = Input.mousePosition;

31     

32     //边界最小值

33     var widthBorder = Screen.width/50; 

34     var heightBorder = Screen.height/50; 

35     

36     var x = 0.0f; 

37     var y = 0.0f; 

38     

39     //当前鼠标位置标记

40     var posTag = 0; 

41     

42     if(widthBorder<=msPos.x && msPos.x<=Screen.width-widthBorder &&

43         heightBorder<=msPos.y && msPos.y<=Screen.height-heightBorder)

44     {

45         transform.Translate(x,y,y); 

46         Debug.Log("asd"+msPos.x+" "+msPos.y);

47     }

48     else 

49     {

50     //  posTag

51     //

52     // 1100 | 1000 | 1001

53     // 0100 | 0000 | 0001

54     // 0110 | 0010 | 0011

55     //

56     // 12   |  8   |  9

57     // 4    |  0   |  1

58     // 6    |  2   |  3

59     //

60         if(msPos.y>Screen.height-heightBorder)

61             posTag = posTag | topTag; 

62         if(msPos.x<widthBorder)

63             posTag = posTag | leftTag;

64         if(msPos.y<heightBorder) 

65             posTag = posTag | botTag;

66         if(msPos.x>Screen.width-widthBorder)

67             posTag = posTag | rightTag;

68             

69         switch(posTag)

70         {

71         case 0: break; 

72         case 1: x = horizontalMoveSpeed; break; 

73         case 2: y = -verticalMoveSpeed; break; 

74         case 3: x = horizontalMoveSpeed; y = -verticalMoveSpeed; break; 

75         case 4: x = -horizontalMoveSpeed; break;

76         case 6: x = -horizontalMoveSpeed; y = -verticalMoveSpeed; break;

77         case 8: y = verticalMoveSpeed; break;

78         case 9: x = horizontalMoveSpeed; y = verticalMoveSpeed; break;

79         case 12:x = -horizontalMoveSpeed;y = verticalMoveSpeed; break;

80         default: break; 

81         }

82         

83         x *= speed*Time.deltaTime;

84         y *= speed*Time.deltaTime;

85         

86         //

87         transform.Translate(x, y, y); 

88     }

89         

90     

91 }