Unity3D 场景平移、缩放

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通过鼠标拖动左右平移场景，滚轮滑动实现场景缩放。

using UnityEngine;  
using System.Collections;  

public class MouseMoveandScale : MonoBehaviour {     
	Vector2 p1, p2;//用来记录鼠标的位置，以便计算移动距离
	void Start () {  

	}  
	void Update () {  
			///<说明>
			/// 通过鼠标X坐标拖动场景
			/// 
		   if (Input.GetMouseButtonDown(0))  
			{  
			    //鼠标左键按下时记录鼠标位置p1 
				p1 = new Vector2(Input.mousePosition.x, Input.mousePosition.y); 
			}  
			if (Input.GetMouseButton(0))  
			{  
			     //鼠标左键拖动时记录鼠标位置p2   
				p2 = new Vector2(Input.mousePosition.x, Input.mousePosition.y); 
				if (transform.position.x >= 10 && transform.position.x <= 300)  //控制在20-130之内  
				{    
				    float dx = (float)0.6 * (p2.x - p1.x); 
					
				    float dy = p2.y-p1.y;					  
					//鼠标左右移动  
					transform.Translate(-dx * Vector3.right * Time.deltaTime);    
				}  
				else if (transform.position.x < 10 && p2.x < p1.x)  
				{  
					float dx = (float)0.6 * (p2.x - p1.x); 
				
					float dy = p2.y-p1.y;  
					//鼠标左右移动  
					transform.Translate(-dx * Vector3.right * Time.deltaTime);  
				}  
				else if (transform.position.x > 300 && p2.x > p1.x)  
				{  
					float dx = (float)0.6 * (p2.x - p1.x); 
				
					float dy = p2.y-p1.y; 
					//鼠标左右移动  
					transform.Translate(-dx * Vector3.right * Time.deltaTime);   
				}  
		}
		//通过鼠标滚轮实现场景缩放
		//鼠标滚轮的效果
		//Camera.main.fieldOfView 摄像机的视野
		//Camera.main.orthographicSize 摄像机的正交投影
		//Zoom out
		if (Input.GetAxis("Mouse ScrollWheel") < 0)
		{
			if (Camera.main.fieldOfView <= 100)
				Camera.main.fieldOfView += 2;
			if (Camera.main.orthographicSize <= 20)
				Camera.main.orthographicSize += 0.5F;
		}
		//Zoom in
		if (Input.GetAxis("Mouse ScrollWheel") > 0)
		{
			if (Camera.main.fieldOfView > 2)
				Camera.main.fieldOfView -= 2;
			if (Camera.main.orthographicSize >= 1)
				Camera.main.orthographicSize -= 0.5F;
		}

	}  
}  

Unity3D 场景平移、缩放

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原文地址：http://blog.csdn.net/u012608885/article/details/51336936