unity 手勢控制物體旋轉縮放(ar)

NO IMAGE

1.新增到要控制的物體上

using UnityEngine;
using System.Collections;
public class CubeScale : MonoBehaviour {
private Touch oldTouch1;  //上次觸控點1(手指1)  
private Touch oldTouch2;  //上次觸控點2(手指2)  
void Start()  
{
}
void Update () {  
//沒有觸控  
if ( Input.touchCount <= 0 ){  
return;  
}  
//單點觸控, 水平上下旋轉  
if( 1 == Input.touchCount ){  
Touch touch = Input.GetTouch (0);  
Vector2 deltaPos = touch.deltaPosition;           
transform.Rotate(Vector3.down  * deltaPos.x , Space.World);   
transform.Rotate(Vector3.right * deltaPos.y , Space.World);  
}  
//多點觸控, 放大縮小  
Touch newTouch1 = Input.GetTouch (0);  
Touch newTouch2 = Input.GetTouch (1);  
//第2點剛開始接觸螢幕, 只記錄,不做處理  
if( newTouch2.phase == TouchPhase.Began ){  
oldTouch2 = newTouch2;  
oldTouch1 = newTouch1;  
return;  
}  
//計算老的兩點距離和新的兩點間距離,變大要放大模型,變小要縮放模型  
float oldDistance = Vector2.Distance(oldTouch1.position, oldTouch2.position);  
float newDistance = Vector2.Distance(newTouch1.position, newTouch2.position);  
//兩個距離之差,為正表示放大手勢, 為負表示縮小手勢  
float offset = newDistance - oldDistance;  
//放大係數
float scaleFactor = offset / 100f;  
Vector3 localScale = transform.localScale;  
Vector3 scale = new Vector3(localScale.x   scaleFactor,  
localScale.y   scaleFactor,   
localScale.z   scaleFactor);  
//最小縮放到 0.1 倍  
if (scale.x > 0.1f && scale.y > 0.1f && scale.z > 0.1f) {  
transform.localScale = scale;  
}  
//記住最新的觸控點,下次使用  
oldTouch1 = newTouch1;  
oldTouch2 = newTouch2;  
}  
}