gaze interaction for cardboard

hey,
i'm beginner in unity and i made very basic android app for cardboard.
i want to put picture that when i gaze for one second the picture will change.
i would like to know how to do it in the easiest way...
i search a tutorial that show this specific function but i did'nt find
can someone help me please...

 

Hi,

You could use raycasting.
Try putting this script on your picture gameobject.
Note: it's untested.

Code (CSharp):

1. ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
2. //   ____ ___ _     ___ ____ ___  _   _   ____  ____   ___ ___ ____
3. //  / ___|_ _| |   |_ _/ ___/ _ \| \ | | |  _ \|  _ \ / _ \_ _|  _ \
4. //  \___ \| || |    | | |  | | | |  \| | | | | | |_) | | | | || | | |
5. //   ___) | || |___ | | |__| |_| | |\  | | |_| |  _ <| |_| | || |_| |
6. //  |____/___|_____|___\____\___/|_| \_| |____/|_| \_\\___/___|____/
7. //
8. ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
9. using UnityEngine;
10.  
11. //#############################################################################################################################
12. //    CLASS: gaze
13. //#############################################################################################################################
14. public class gaze : MonoBehaviour
15. {
16.     ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
17.     //    CONSTANTS
18.     const float K_F_RAYLEN = 1000.0f;
19.     const float K_F_GAZE_TIME = 1.0f;
20.     ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
21.     //    AWAKE
22.     Collider cCollider;
23.     private void Awake()
24.     {
25.         cCollider = this.gameObject.AddComponent<MeshCollider>();
26.         if (!cCollider)
27.         {
28.             UnityEngine.Debug.LogWarning("CANT ADD COLLIDER TO " + this.name);
29.         }
30.     }
31.     ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
32.     //    UPDATE
33.     Ray cRay = new Ray();
34.     RaycastHit cHit = new RaycastHit();
35.     bool bHitting;
36.     bool bTriggered;
37.     float fTimeGazeStart;
38.     void Update()
39.     {
40.         if (!cCollider)
41.         {
42.             return;
43.         }
44.         if (!Camera.main)
45.         {
46.             return;
47.         }
48.         //  SETUP RAY
49.         cRay.origin = Camera.main.transform.position;
50.         cRay.direction = Camera.main.transform.forward;
51.         //  RAYCAST
52.         if (Physics.Raycast(cRay, out cHit, K_F_RAYLEN))
53.         {
54.             //  GAZING AT THIS?
55.             if (cHit.collider == cCollider)
56.             {
57.                 //  GAZE STARTED
58.                 if (!bHitting)
59.                 {
60.                     bHitting = true;
61.                     fTimeGazeStart = Time.time;
62.                 }
63.                 else if (!bTriggered)
64.                 {
65.                     if ((Time.time - fTimeGazeStart) >= K_F_GAZE_TIME)
66.                     {
67.                         bTriggered = true;
68.                         DoTriggerAction();
69.                     }
70.                 }
71.             }
72.             //  GAZE STOPPED BUT STILL ON SOME OTHER COLLIDER
73.             else if (bHitting)
74.             {
75.                 bTriggered = false;
76.                 bHitting = false;
77.             }
78.         }
79.         //  GAZE STOPPED NOT ON ANY COLLIDER
80.         else if (bHitting)
81.         {
82.             bTriggered = false;
83.             bHitting = false;
84.         }
85.     }
86.     ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
87.     //    YOUR ACTION HERE
88.     private void DoTriggerAction()
89.     {
90.         UnityEngine.Debug.Log("YOU GAZED AT " + this.name + " FOR " + K_F_GAZE_TIME + " SECONDS");
91.         //  YOU CAN CHANGE YOUR PICTURE HERE, BY CHANGING MATERIALS TEXTURE ETC...
92.     }
93. }
94.  
95.  

 

thanks!