Unity 移动摄像机的脚本(类似于魔兽争霸， LOL的摄像机移动方式)

类似LOL、魔兽争霸摄像机的移动， 

当鼠标移动到窗口上下左右边界的时候， 移动摄像机。 

将屏幕分为9份， 每一份一个标记， 标记划分参考计算机图形学

//整体移动速度
var speed=5; 

//关于鼠标滑轮的参数
var MouseWheelSensitivity = 0.0001f; 
var MouseZoomMin = -2.4f; 
var MouseZoomMax = 1.0f;
var normalDistance = -1.1; 

//水平和垂直的移动速度
var horizontalMoveSpeed = 0.1; 
var verticalMoveSpeed = 0.1; 

//上左下右的标记
var topTag = 8; 
var leftTag = 4; 
var botTag = 2; 
var rightTag = 1;

function Start () {
	
}

function Update () {
	
	//获取cursor坐标
	var msPos = Input.mousePosition;
	
	//边界最小值
	var widthBorder = Screen.width/50; 
	var heightBorder = Screen.height/50; 
	
	var x = 0.0f; 
	var y = 0.0f; 
	
	//当前鼠标位置标记
	var posTag = 0; 
	
	if(widthBorder<=msPos.x && msPos.x<=Screen.width-widthBorder &&
		heightBorder<=msPos.y && msPos.y<=Screen.height-heightBorder)
	{
		transform.Translate(x,y,y); 
		Debug.Log("asd"+msPos.x+" "+msPos.y);
	}
	else 
	{
	//  posTag
	//
	// 1100 | 1000 | 1001
	// 0100 | 0000 | 0001
	// 0110 | 0010 | 0011
	//
	// 12   |  8   |  9
	// 4    |  0   |  1
	// 6    |  2   |  3
	//
		if(msPos.y>Screen.height-heightBorder)
			posTag = posTag | topTag; 
		if(msPos.x<widthBorder)
			posTag = posTag | leftTag;
		if(msPos.y<heightBorder) 
			posTag = posTag | botTag;
		if(msPos.x>Screen.width-widthBorder)
			posTag = posTag | rightTag;
			
		switch(posTag)
		{
		case 0: break; 
		case 1: x = horizontalMoveSpeed; break; 
		case 2: y = -verticalMoveSpeed; break; 
		case 3: x = horizontalMoveSpeed; y = -verticalMoveSpeed; break; 
		case 4: x = -horizontalMoveSpeed; break;
		case 6: x = -horizontalMoveSpeed; y = -verticalMoveSpeed; break;
		case 8: y = verticalMoveSpeed; break;
		case 9: x = horizontalMoveSpeed; y = verticalMoveSpeed; break;
		case 12:x = -horizontalMoveSpeed;y = verticalMoveSpeed; break;
		default: break; 
		}
		
		x *= speed*Time.deltaTime;
		y *= speed*Time.deltaTime;
		
		//
		transform.Translate(x, y, y); 
	}
		
	
}