一个控制摄像头移动的脚本，直接绑定到摄像机就可以使用.功能描述如下：

1.鼠标左键拖动观察

2.鼠标右键定点旋转

3.鼠标滚轴放大缩小

4.鼠标左键快速双击进行定点放大

1 #pragma strict 2 /*** 3 **摄影机控制 4 *@author felly 5 */ 6  7 private var rayRotate :Ray = Ray(Vector3.zero, Vector3(0,1,0)); 8 private var rayTranslate :Ray = Ray(Vector3.zero, Vector3(0,1,0)); 9 private var hitInfo : RaycastHit ;10 11 private var preTime :float = 0.0;12 13 14 //它标记是否能旋转15 private var flag :boolean = false ;16 17 function Update () {
   ///事件监视18 19      var direction :Vector3 = Vector3.zero;20      var px:float ;21      var pz:float ;22      23      24      if(Input.GetMouseButtonDown(0)){25          rayTranslate = camera.ScreenPointToRay(Input.mousePosition);26         //以摄像机为起点画射线，射线去地板碰撞点就是那个焦点27         Physics.Raycast(camera.transform.position, rayTranslate.direction, hitInfo);28         if (Time.time - preTime  < 0.3f ){29           hitInfo.point=hitInfo.point+Vector3(0,5,0);30           transform.position=Vector3.MoveTowards(camera.transform.position,hitInfo.point,10.0);31         }32          33          preTime = Time.time ;34      }35      36      //上下左右拖动37     if(Input.GetMouseButton(0)){38         px = Input.GetAxis("Mouse X") ;39         pz = Input.GetAxis("Mouse Y") ;40         direction = Vector3(px, pz, pz);41         transform.Translate( -1 * direction * 30 * Time.deltaTime);42     }43     44     //滚轴放到缩小45     pz = Input.GetAxis("Mouse ScrollWheel");46     direction = Vector3(0, 0, pz);47     transform.Translate(direction * 100 * Time.deltaTime);48     49     //旋转50     if(Input.GetMouseButtonDown(1)){51         rayRotate = camera.ScreenPointToRay(Input.mousePosition);52         flag = true ;53     }54     if(Input.GetMouseButtonUp(1)){55         rayRotate = Ray(Vector3.zero, Vector3(0,1,0));56         flag = false ;57     }58     if(Input.GetMouseButton(1) && flag){59         Physics.Raycast(camera.transform.position, rayRotate.direction, hitInfo);60         px = Input.GetAxis("Mouse X") ;61         transform.RotateAround(hitInfo.point, Vector3.up, 100 * px * Time.deltaTime);62     }63 }