Develop Reference

Unity AR Multiple Image Target but not simultaneously

I am building this app, that will recognize painting and will display the info about it with the help of AR.
And I need to call multiple image target but not simultaneously, it will only call the image target if it is detected by AR camera.
*Ive tried creating many scenes with Image target on it but I cant call different imagetarget it keeps on reverting to only 1 imagetarget.
This is wat you can see in menu,
Main menu
Start AR camera(This part should have many image target but not detecting it simultaneously)
Help(how to use the app)
Exit
*Im using vuforia in creating AR
Thanks in advance for those who will help me.
This is the imagetarget and its Database
View post on imgur.com

Run the multi target scene sample. There are three target (stone, wood and road).
Each contains the TrackableBehaviour component.
Grab it and disable it in Start. If you do it in Awake it will be set back to active most likely in the Awake of the component itself or via some other manager.
public class TrackerController:MonoBehaviour
{
private IDictionary<string,TrackableBehaviours> trackers = null;
private void Start()
{
this.trackers = new Dictionary<string,TrackableBehaviour>();
var trackers = FindObjectsOfType<TrackableBehaviour>();
foreach(TrackingBehaviour tb in trackers)
{
this.trackers.Add(tb.TrackableName, tb);
tb.enabled = false;
}
}
public bool SetTracker(string name, bool value)
{
if(string.IsNullOrEmpty(name) == true){ return false; }
if(this.trackers.ContainsKey(name) == false){ return false; }
this.trackers[name].enabled = value;
return true;
}
}
The method finds all TrackableBehaviour and places them in a dictionary for easy access. The setting method return boolean, you can change it to throw exception or else.

Replace gesture library templates in android

Is it possible to replace a gesture template of template library from a running application?
I am building a handwriting recognizer system in which there are templates of letters in gesture library file.So basically after loading the library inside the code i compare user input gesture like:
public void onGesturePerformed(GestureOverlayView overlay, Gesture gesture) {
ArrayList<Prediction> predictions = gesturelib.recognize(gesture);
if (predictions.size() > 1) {
for(Prediction prediction: predictions){
//i compare prediction name here and if matches print it in an edittext
}
This should work good until user will give the same pattern like i did during building the library template.But i want to give an user that flexibility to replace an template item with his handwritten pattern when there is a mismatch of prediction.
Because below 2 handwritten gesture samples are different in terms of pattern,but not as a letter.Suppose,my system supports the 1st image pattern,i want when user will give 2nd image pattern the system will ask confirmation from user to replace it with the library pattern of A and then replace it after confirm.So next time the system will recognize user pattern much better.
Any help would be greatly appreciated.

If I understand correctly, you want to replace an already existing gesture with a new one?
So, when the user inputs a gesture that isn't in the library, your app asks the user to select which gesture they wish to replace? From your question, I will assume that when user draws a lowercase a(and if a isn't in the library), user is presented with a list of all available gestures/letters that your app currently supports. And then, the user selects capital A, and now, capital A must be replaced with lowercase a. In the following code, oldGesture is the Gesture corresponding to A. And newGesture is the Gesture just drawn.
The process for that would be: delete the old gesture, add the new one using old gesture's name. To delete a gesture, use GestureLibrary.removeGesture(String, Gesture):
public void onGesturePerformed(GestureOverlayView overlay, final Gesture gesture) {
ArrayList<Prediction> predictions = gesturelib.recognize(gesture);
if (predictions.size() > 1) {
for(Prediction prediction: predictions){
if (prediction.score > ...) {
} else {
if (user wants to replace) {
showListWithAllGestures(gesture);
}
}
}
}
}
public void showListWithAllGestures(Gesture newGesture) {
....
....
// User picks a gesture
Gesture oldGesture = userPickedItem.gesture;
String gestureName = userPickedItem.name;
// delete the gesture
gesturelib.removeGesture(gestureName, oldGesture);
gesturelib.save();
// add gesture
gesturelib.addGesture(gestureName, newGesture);
gesturelib.save();
}
To get a list of all available gestures:
// Wrapper to hold a gesture
static class GestureHolder {
String name;
Gesture gesture;
}
Load gestures using GestureLibrary.load():
if (gesturelib.load()) {
for (String name : gesturelib.getGestureEntries()) {
for (Gesture gesture : gesturelib.getGestures(name)) {
final GestureHolder gestureHolder = new GestureHolder();
gestureHolder.gesture = gesture;
gestureHolder.name = name;
// Add `gestureHolder` to a list
}
}
// Return the list that holds GestureHolder objects
}
Edit:
Sorry, but the check I have suggested: if (wants to replace) is being carried out at the wrong place in code.
if (predictions.size() > 1) {
// To check whether a match was found
boolean gotAMatch = false;
for(int i = 0; i < predictions.size() && !gotAMatch; i++){
if (prediction.score > ... ) {
....
....
// Found a match, look no more
gotAMatch = true;
}
}
// If a match wasn't found, ask the user s/he wants to add it
if (!gotAMatch) {
if (user wants to replace) {
showListWithAllGestures(gesture);
}
}
}

Stored gesture in Android?

I have one screen where the user creates a gesture, then the user presses Next and on the Next screen it asks the user to confirm that gesture. Basically I want the gesture stored as a password. The gesture creation works fine, I have the following lines of code which store the gesture in the device's memory:
GestureLibrary store = GestureLibraries.fromRawResource(this, R.raw.gestures);;
store.addGesture("Gesture Password", mGesture);
store.save();
setResult(RESULT_OK);
I'm still messing around with how to recognize the gesture but for now I'm just trying to figure out how to compare against this stored gesture in memory. I have the following:
public void onGesturePerformed(GestureOverlayView overlay, Gesture gesture) {
ArrayList<Prediction> predictions = gestureLib.recognize(gesture);
for (Prediction prediction : predictions) {
if (prediction.score > 1.0) {
Toast.makeText(this, prediction.name, Toast.LENGTH_SHORT).show();
}
}
}
Where:
private GestureLibrary gestureLib = GestureLibraries.fromRawResource(this, R.raw.gestures);
As I understand, on the first screen I create the gesture, it's stored in raw.gestures, then I try accessing it again in the confirm screen and if the confirm gesture is similar enough, the toast should return "Gesture Password". But this doesn't work for some reason, what am I missing? Am I storing and retrieving the gesture incorrectly?

How to show native alert in cocos2D android?

I am creating a game in cocos2D android. I need to have an alert at the end of my game.
Can I do this in cocos2D android?

I think you should do this with JNI using the showMessageBoxJNI(const char * pszMsg, const char * pszTitle) method in the MessageJni.cpp class (in /cocos2dx/platform/android/jni). Simply import MessageJni.cpp in the class where you want to add an alert:
#include "./cocos2dx/platform/android/jni/MessageJni.h" // Note: this is a relative path, take care to the beginnin of the path "./" or "././" or etc..
showMessageBoxJNI("My alert message", "My alert title"); //Add this where you want in your class
Hope this helps.

Use menu for that. I think it is better option. on doing this, you can put click even to game over.when your game s over write below code
CCMenuItemFont item6 = CCMenuItemFont.item("Game over", this, "gameover");
CCMenuItemFont.setFontSize(14);
item6.setColor( new ccColor3B(0,0,0));
CCMenu menu = CCMenu.menu(item6);
menu.alignItemsVertically();
addChild(menu);
and onclick of that menu this write below function. it will be called onclick.
public void gameover()
{
try {
CCScene scene = nextlevellayer.scene();
CCDirector.sharedDirector().pushScene(scene);
} catch (Exception e) {
e.printStackTrace();
}
}

Android - Gestures dont's want to work

I ran Gestures Builder app, created gestures file for slide left/right and wrote this code:
public class MainActivity extends Activity implements OnGesturePerformedListener {
private GestureLibrary mGestureLibrary;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
GestureOverlayView gestureOverlayView = new GestureOverlayView(this);
View inflate = getLayoutInflater().inflate(R.layout.main, null);
gestureOverlayView.addView(inflate);
gestureOverlayView.addOnGesturePerformedListener(this);
mGestureLibrary = GestureLibraries.fromRawResource(this, R.raw.gestures);
if (mGestureLibrary == null) {
finish();
}
setContentView(gestureOverlayView);
}
#Override
public void onGesturePerformed(GestureOverlayView overlay, Gesture gesture) {
ArrayList<Prediction> predictions = mGestureLibrary.recognize(gesture);
for (Prediction prediction : predictions) {
if (prediction.score > 1.0) {
Toast.makeText(this, prediction.name, Toast.LENGTH_SHORT).show();
}
}
}
}
gestures are in /raw/, but the app says nothing when I try to test it (it loads gesture successfully, the event onGesturePerformed is called, but the gestures are not recognized). The gestures work perfectly in Gestures Buileder, so where is my mistake?

You need to still check the name of the prediction which should match the name of one of your actions. Test for equality and then perform your logic:
String action = predictions.get(0).name;
if("right".equals(action){
}

You may need to call load() on mGestureLibrary before using it. Not that it's documented at all, but that's what Lars does in this example and it works for me: http://www.vogella.com/articles/AndroidGestures/article.html
In the IDE you should be able to see entries in the GestureStore HashMap (mNamedGestures).