[Unity3d]旋转拖动物体

效果图：

代码：

using UnityEngine;
using System.Collections;

public class DragModel : MonoBehaviour {
	
	
	private float x = 0.0f;
	private float y = 0.0f;
	
	private float xSpeed = 800.0f;
	private float ySpeed = 800.0f;
	
	private float zSpeed = 160f;
	
	private float minDistence = -3;
	private float maxDistence = 15;
	

	void Update () 
	{
		
		if(Input.GetMouseButton(0))
		{
			x=Input.GetAxis("Mouse X") *xSpeed;

			y=Input.GetAxis("Mouse Y") *ySpeed;
			
			transform.Rotate(Vector3.up * -x *Time.deltaTime,Space.World);
			transform.Rotate(Vector3.right * y *Time.deltaTime,Space.World);
			
		}		
		else if(Input.GetAxis("Mouse ScrollWheel")!=0)
		{
			float ga = Input.GetAxis("Mouse ScrollWheel");
			if(transform.position.z > minDistence && transform.position.z<maxDistence||transform.position.z<=minDistence && ga<0||transform.position.z>=maxDistence && ga>0)
			{
				transform.Translate(Vector3.forward*-ga*zSpeed*Time.deltaTime,Space.World);	
			}
		}
	}
}