Unity3d物体模型（实现旋转缩放平移自动旋转）

基本功能实现：物体通过鼠标左键上下移动，中间键缩放、右键旋转，30秒没操作，物体自动旋转

实例代码：

using UnityEngine;
using System.Collections;

public class Script_07_11 : MonoBehaviour
{

	public Transform target;

	private int MouseWheelSensitivity = 50;
	private int MouseZoomMin = 20;
	private int MouseZoomMax = 112;
	private float normalDistance = 500;

	private bool flag_Roable = true;//自动旋转标志

	private Vector3 normalized;

	private float xSpeed = 250.0f;
	private float ySpeed = 120.0f;

	private float x = 0.0f;
	private float y = 0.0f;

	private System.DateTime  oldTime;
	private System.DateTime  nowTime;

	void Start ()
	{

		oldTime = System.DateTime.Now;
		//transform.LookAt(target);

	}

	void Update ()
	{
		nowTime = System.DateTime .Now;
		System.TimeSpan	 ts1 = new System.TimeSpan(oldTime.Ticks);
		System.TimeSpan	 ts2 = new System.TimeSpan(nowTime.Ticks);

		System.TimeSpan ts =  ts2.Subtract(ts1).Duration();

		if(ts.Seconds>30 && !Input.anyKey)
		{
			flag_Roable = true;
			oldTime = System.DateTime.Now;
		}

		if(flag_Roable && Input.anyKey)
		{
			flag_Roable = false;
		}

		if(flag_Roable)//自动旋转
		{

			x-=Time.deltaTime*30;

			var rotation = Quaternion.Euler(0,x,0);
			transform.RotateAround(target.position,Vector3.up,0.3f);
		}
		else
		{
			if(Input.GetMouseButton(1))
			{
				if(Input.GetAxis("Mouse X")<0)
					transform.RotateAround(target.position,Vector3.down,4);
				if(Input.GetAxis("Mouse X")>0)
					transform.RotateAround(target.position,Vector3.up,4);
			}
			else if (Input.GetAxis("Mouse ScrollWheel") != 0)
			{

			    //normalized = (transform.position - CameraTarget).normalized;

				if (normalDistance >= MouseZoomMin && normalDistance <= MouseZoomMax)
				{
					normalDistance -= Input.GetAxis("Mouse ScrollWheel") * MouseWheelSensitivity;
				}
				if (normalDistance < MouseZoomMin)
				{
					normalDistance = MouseZoomMin;
				}
				if (normalDistance > MouseZoomMax)
				{
					normalDistance = MouseZoomMax;
				}
					//transform.position =	   normalized * normalDistance;
				transform.camera.fieldOfView = normalDistance;

			}
			else if(Input.GetMouseButton(0))
			{
				//print("wyz-==="+Input.GetAxis("Mouse Y"));
				if(Input.GetAxis("Mouse Y")<0)  //down
				{
					Vector3 temp=Vector3.up * 60.0f * Time.deltaTime;

					print("wyz==up==="+transform.localPosition.y);
					if(transform.localPosition.y>300)
					{
						temp=Vector3.up * 5.0f * Time.deltaTime;
						transform.Translate(temp);
					}
					else
					{
						transform.Translate(temp);
					}
				}

				if(Input.GetAxis("Mouse Y")>0)  //up
				{
					print("wyz==donw==="+transform.localPosition.y);
					Vector3 temp=Vector3.down * 60.0f * Time.deltaTime;

					if(transform.localPosition.y<-300)
					{
						temp=Vector3.up * 5.0f * Time.deltaTime;
						transform.Translate(temp);
					}
					else
					{
						transform.Translate(temp);
					}
				}

			}	

		}

	}

}