multipule touch issue

Hi, all:
our APP made with unity(5.6.0), we need to scale the model by two fingers. And also we need to take a picture by calling image picker.
However, once we did took a photo then we can't scale the model cuz APP can only detected first touch.
The state of multipletouchenabled is true.

Here is the flow:
we scale the model by two fingers ------- works fine.
take photo ---- get the texture data;
we scale the model by two fingers ----- Only can detect first touch, seems like multipletouchenable is false, but the log show multipletoucheable is true!!!

pls help

 

Can you show your code (in code tags) as there's likely an logic error somewhere in your code.

 

Code (CSharp):

1. public class ScaleController : MonoBehaviour
2. {
3.     public float MinScale = 0.1f;
4.     public float MaxScale = 0.5f;
5.  
6.     private InstantTrackerController _controller;
7.     private Transform _activeObject = null;
8.  
9.     private Vector3 _touch1StartGroundPosition;
10.     private Vector3 _touch2StartGroundPosition;
11.     private Vector3 _startObjectScale;
12.  
13.     private void Start ()
14.     {
15.         _controller = GetComponent<InstantTrackerController>();
16.     }
17.  
18.     private void Update ()
19.     {
20.         if (Input.touchCount >= 2)
21.         {
22.             Touch touch1 = Input.GetTouch(0);
23.             Touch touch2 = Input.GetTouch(1);
24.             Transform hitTransform;
25.  
26.             if (_activeObject == null)
27.             {
28.                 if (GetTouchObject(touch1.position, out hitTransform))
29.                 {
30.                     SetTouchObject(hitTransform);
31.                 } else if (GetTouchObject(touch2.position, out hitTransform))
32.                 {
33.                     SetTouchObject(hitTransform);
34.                 } else if (GetTouchObject((touch1.position + touch2.position) / 2, out hitTransform))
35.                 {
36.                     SetTouchObject(hitTransform);
37.                 }
38.  
39.                 if (_activeObject != null)
40.                 {
41.                     _touch1StartGroundPosition = GetGroundPosition(touch1.position);
42.                     _touch2StartGroundPosition = GetGroundPosition(touch2.position);
43.                     _startObjectScale = _activeObject.localScale;
44.                 }
45.             }
46.  
47.             if (_activeObject != null)
48.             {
49.                 var touch1GroundPosition = GetGroundPosition(touch1.position);
50.                 var touch2GroundPosition = GetGroundPosition(touch2.position);
51.  
52.                 float startMagnitude = (_touch1StartGroundPosition - _touch2StartGroundPosition).magnitude;
53.                 float currentMagnitude = (touch1GroundPosition - touch2GroundPosition).magnitude;
54.  
55.                 _activeObject.localScale = _startObjectScale * (currentMagnitude / startMagnitude);
56.              
57.                 if (_activeObject.localScale.x < MinScale)
58.                 {
59.                     _activeObject.localScale = new Vector3(MinScale, MinScale, MinScale) ;
60.                 }
61.  
62.                 if (_activeObject.localScale.x > MaxScale)
63.                 {
64.                     _activeObject.localScale = new Vector3(MaxScale, MaxScale, MaxScale);
65.                 }
66.             }
67.         }
68.         else
69.         {
70.             _activeObject = null;
71.  
72.         }
73.     }
74.  
75.     private bool GetTouchObject(Vector2 touchPosition, out Transform hitTransform)
76.     {
77.         var touchRay = Camera.main.ScreenPointToRay(touchPosition);
78.         touchRay.origin -= touchRay.direction * 100.0f;
79.  
80.         RaycastHit hit;
81.         if (Physics.Raycast(touchRay, out hit, 400.0f, LayerMask.GetMask("Sofa")))
82.         {
83.             hitTransform = hit.transform.root;
84.             return true;
85.         }
86.  
87.         hitTransform = null;
88.         return false;
89.     }
90.  
91.     private Vector3 GetGroundPosition(Vector2 touchPosition)
92.     {
93.         var groundPlane = new Plane(Vector3.up, Vector3.zero);
94.         var touchRay = Camera.main.ScreenPointToRay(touchPosition);
95.         float enter;
96.         if (groundPlane.Raycast(touchRay, out enter))
97.         {
98.             return touchRay.GetPoint(enter);
99.         }
100.         return Vector3.zero;
101.     }
102.  
103.     private void SetTouchObject(Transform newObject)
104.     {
105.         Debug.Log("ScaleController.SetTouchObject  1");
106.         // foreach (var obj in _controller.ActiveModels.Values)
107.         foreach (SofaItem item in _controller.ActiveModels)
108.         {
109.             Debug.Log("ScaleController.SetTouchObject  2");
110.             if (item.obj == newObject.gameObject)
111.             {
112.                 Debug.Log("ScaleController.SetTouchObject  3");
113.                 _activeObject = newObject;
114.                 Debug.Log(_activeObject.name);
115.             }
116.         }
117.     }
118. }

 

thx for reply, above is my code.

 

by the way, the app works fine on android.

 

Please use code tags https://forum.unity3d.com/threads/using-code-tags-properly.143875/

It's almost impossible to read without them (you may need to paste it again to ensure formatting is not lost).

 

thx for reply. first time to post code. thx for the guide.