Vuforia Virtual Buttons anyone?

Hi there! Anyone have any experience in working with vuforia's virtual buttons? I am looking to make a virtual button on the image object, that changed it's child's animation.

ie, so once you pop in your image under the camera, a 3d model pops up, and then a virtual button is used to change that object's animation.

so here is the script that i have attached to the virtual button (no effect is acheived right now) :

Code (csharp):

1. using UnityEngine;
2. using System.Collections;
3.  
4. public class whaleAnimation : MonoBehaviour, IVirtualButtonEventHandler {
5.    
6.     public GameObject Character;
7.    
8.    
9.     // Use this for initialization
10.     void Start () {
11.    
12.     Character = transform.FindChild("humpback").gameObject;
13.  
14.    
15.    
16.    
17.     }
18.    
19.    
20.    
21.    
22.    
23.     public void OnButtonPressed(VirtualButtonBehaviour vb){
24.         Character.animation.Play("death");
25.         Debug.Log("pressed");
26.     }
27.    
28.    
29.    
30.     public void OnButtonReleased(VirtualButtonBehaviour vb) {
31.         Character.animation.Stop("death");
32.        
33.     }
34.    
35.    
36.    
37.    
38.    
39.    
40.    
41.    
42.    
43.     // Update is called once per frame
44.     void Update () {
45.    
46.     }
47. }
48.  

what am i leaving out?

 

I'm interested in using V-Buttons as well .. So I will have a play around over the next few days let you know how things go.

I'm also using NGUI .. so I hope it will operate within Vuforia.

Regards,
Mick

 

Hi,

I will try to help, bear with me.

- Have you tried attaching your script to the ImageTarget instead of to the Virtual button?
- Also, can you confirm if you are trying you app inside Unity or with the printed marker and the app installed on your device? There will be no effect when testing on inside Unity.

I know you may already verified this, but also double check if your Character game object has been initialized?

On the other Hand?, do you see your debug messages on the Console (if you are working with iOS devices)?

Hope it helps, let me know.

Also I that doesn´t help, try posting you question on the Vuforia forum as well!

 

Hi guys

Since I got this working, I thought I'd put my findings up.

Basically the main thing is that each Virtual Button has a "Virtual Button Behaviour" (VBE) script component. This script is a C# class exposing various methods for controlling the execution of your Virtual Button. Whenever something happens, such as pressing the button and releasing it, an event is thrown, and this script calls event handlers. The event handlers are themselves scripts that need to be attached to a game object as a component. The trick is that before these event handlers can be invoked by the Virtual Button they need to be registered with that Virtual Button's VBE script component. These event handlers must implement IVirtualButtonEventHandler.

What I did is I created a script to change the color of a spotlight. Here is my script:

Code (csharp):

1. using UnityEngine;
2. using System.Collections;
3.  
4. public class SpotlightColorChangeVB : MonoBehaviour, IVirtualButtonEventHandler {
5.    
6.     private bool switchState = true;
7.    
8.     // Use this for initialization
9.     void Start () {
10.         // Register yourself as a handler for a button
11.         Object[] objects = FindSceneObjectsOfType(typeof(GameObject));
12.         foreach (Object vObject in objects) {
13.             GameObject gameObject = (GameObject) vObject;
14.             if (gameObject.name.Equals("VirtualButton")) {
15.                 Debug.Log("Found the VirtualButton GameObject!");
16.                 VirtualButtonBehaviour vbuttonBehavior = (VirtualButtonBehaviour) gameObject.GetComponent(typeof(VirtualButtonBehaviour));
17.                 vbuttonBehavior.RegisterEventHandler(this);
18.                 Debug.Log("I'm registered!");
19.             }
20.             Debug.Log(gameObject.name);
21.         }
22.     }
23.    
24.     // Update is called once per frame
25.     void Update () {
26.    
27.     }
28.    
29.     private void switchColor() {
30.         if (switchState) {
31.             switchState = false;
32.             gameObject.light.color = Color.blue;
33.         } else {
34.             switchState = true;
35.             gameObject.light.color = Color.red;
36.         }
37.     }
38.    
39.     #region IVirtualButtonEventHandler implementation
40.     public void OnButtonPressed (VirtualButtonBehaviour vb)
41.     {
42.         Debug.Log("Button pressed!");
43.         switchColor();
44.         //throw new System.NotImplementedException ();
45.     }
46.  
47.     public void OnButtonReleased (VirtualButtonBehaviour vb)
48.     {
49.        
50.         //throw new System.NotImplementedException ();
51.     }
52.     #endregion
53. }

Excuse the messy coding, I just wanted to get it to work. As you can see, I use the Start() method inherited from the MonoBehaviour interface to look for my Virtual Button (must be the name you gave the Game Object, not the name attribute of the VBE script component), and then I attach this event handler to it. Then it's just a matter of putting some logic in the OnButtonPressed() method to do your bidding when the Virtual Button to which you attached this event handler is pressed (there's also a OnButtonReleased() method you could use, but I just left it blank).

Just remember to attach this script as a component to a game object in your scene (drag and drop script onto game object in scene hierarchy). I attached mine to the spotlight game object, but I imagine you can attach it to pretty much any game object.

Hope this helps someone!
Cheers!

 

it doesn't work with me

 

Hey.. even I tried the above logic but it is not working for me. "OnButtonPressed" is not getting called for me. Can you tell if anything else needs to be done..

 

Does not work for me either - any advice? I have no functionality in the OnButtonPressed/OnButtonReleased methods apart from a Debug.Log to check that the method gets called, but they don't.

 

Hi There,,
I Hope This would be informative and useful,,
first of all i should mention that you have to assign this script to ImageTarget itself,,

i tried to concisely write the code and not make any ambiguity but as a side note if you want to see the result working properly please
set the sensivity setting to HIGH.


_________________________________________

Code (csharp):

1.  
2. using UnityEngine;
3. using System.Collections;
4.  
5. public class Custom_VirtualButton : MonoBehaviour, IVirtualButtonEventHandler
6. {
7.     // Use this for initialization
8.     void Start () {
9.  
10. // here it finds any VirtualButton Attached to the ImageTarget and register it's event handler and in the
11. //OnButtonPressed and OnButtonReleased methods you can handle different buttons Click state
12. //via "vb.VirtualButtonName" variable and do some really awesome stuff with it.
13.         VirtualButtonBehaviour[] vbs = GetComponentsInChildren<VirtualButtonBehaviour>();
14.         foreach (VirtualButtonBehaviour item in vbs)
15.         {
16.             item.RegisterEventHandler(this);
17.         }
18.    
19.     }
20.    
21.     // Update is called once per frame
22.     void Update () {
23.    
24.     }
25.  
26.  
27.     #region VirtualButton
28.  
29.     public void OnButtonPressed(VirtualButtonAbstractBehaviour vb)
30.     {
31.         Debug.Log("Helllllloooooooooo");
32.     }
33.  
34.     public void OnButtonReleased(VirtualButtonAbstractBehaviour vb)
35.     {
36.         Debug.Log("Goooooodbyeeee");
37.     }
38.  
39.     #endregion //VirtualButton
40. }
41.  

_________________________________________________________________________________________
and after writing this code you have to go to StreamingAsset/QCAR and find your ImageTarget XML Association
file and Open it ,, it should be something like this

Code (csharp):

1.  
2. <?xml version="1.0" encoding="UTF-8"?>
3. <QCARConfig xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="qcar_config.xsd">
4.   <Tracking>
5.     <ImageTarget name="marker01" size="100.000000 100.000000" />
6.   </Tracking>
7. </QCARConfig>
8.  

change that file to store the VirtualButton Coordinates in unity world like this:

Code (csharp):

1.  
2. <?xml version="1.0" encoding="UTF-8"?>
3. <QCARConfig xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="qcar_config.xsd">
4.   <Tracking>
5.     <ImageTarget name="marker01" size="100.000000 100.000000">
6.  
7.       <VirtualButton name="red" rectangle="-49.00 -9.80 -18.82 -40.07" enabled="true" />
8.     </ImageTarget>
9.   </Tracking>
10. </QCARConfig>
11.  

but be aware that when you are specifying the coordinate in "rectangle" it is made of 4 coordinate numbers
the first TWO are TopLeft and The last TWO are ButtomRight of your Button,,
and also be aware that these numbers specify the coordinates in "World Coordinate System"
which means you can create some objects like a sphere and it shouldn't be child of any objects
then place it in the right place(TopLeft of your button) to look at its "x" and "z" coordinate numbers and copy it to the first two number here in the XML file and do the latter for ButtomRight of your button and there you go the scripts you are writing should just work fine.

 

please how do you get the virtual buttons coordinates?

 

Create an empty game object make it child of your image target and vertex snap it to your virtual buttons, just multiplay the displayed number by 1k and you have what you need, unity usually runs with 1 unit = 1m and 1 millimeter is 1/1000m

 

You need to include:

using Vuforia;

at the very top of your code just like that.

 

error CS0029: Cannot implicitly convert type `UnityEngine.Object' to `UnityEngine.Object[]'
can anyone help how to resolve this

 

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Thanks for the video, but why is it running so fast?1