多点触控（unity）

using UnityEngine;

using System.Collections;

 

public class TouchTest : MonoBehaviour

{

 

 

public GameObject ball;

private float lastDis = 0;

private float cameraDis = -20;

public float ScaleDump = 0.1f;

 

 

void Update()

{

if (Input.touchCount == 1)

{

Touch t = Input.GetTouch(0);

if (t.phase == TouchPhase.Moved)

{

ball.transform.Rotate(Vector3.right, Input.GetAxis("Mouse Y"), Space.World);

ball.transform.Rotate(Vector3.up, -1 * Input.GetAxis("Mouse X"), Space.World);

}

}

else if (Input.touchCount > 1)

{

Touch t1 = Input.GetTouch(0);

Touch t2 = Input.GetTouch(1);

if (t2.phase == TouchPhase.Began)

{

lastDis = Vector2.Distance(t1.position, t2.position);

 

}

else

if (t1.phase == TouchPhase.Moved && t2.phase == TouchPhase.Moved)

{

float dis = Vector2.Distance(t1.position, t2.position);

if (Mathf.Abs(dis - lastDis) > 1)

{

cameraDis += (dis - lastDis) * ScaleDump;

cameraDis = Mathf.Clamp(cameraDis, -40, -5);

lastDis = dis;

}

}

}

 

}

 

private void LateUpdate()

{

this.transform.position = new Vector3(0, 0, cameraDis);

}

 

private void OnGUI()

{

string s = string.Format("Input.touchCount={0}\ncameraDis=\n{1}",

Input.touchCount, cameraDis);

GUI.TextArea(new Rect(0, 0, Screen.width / 10, Screen.height), s);

if (GUI.Button(new Rect(Screen.width*9/10,0,Screen.width/10,Screen.height/10),"quit"))

{

Debug.Log("quit");

Application.Quit();

}

}

}