Hello, I need to get the ID of the target has recognized. That's when I use the recognition cloud target. I did when the target detected (cloud recognition) downloading the necessary files from the server for the scene of augmented reality, but now I need to for each target has download different files, but how to get the ID targeta I could not understand, please help me, я новичек в Vuforia SDK. Thanks in advance.
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How to get ID cloud image target?
January 22, 2014 - 11:03am #9
How to get ID cloud image target?
January 22, 2014 - 4:50am #8
You need to use JNI to pass objects or primitive values from C++ to Java;
this is a quick introduction on JNI with Vuforia:
https://developer.vuforia.com/resources/dev-guide/java-native-interface
But a more comprehensive guide on JNI programming can be found here:
http://docs.oracle.com/javase/6/docs/technotes/guides/jni/
How to get ID cloud image target?
January 11, 2014 - 12:58pm #6
I got this code in cloudreco.cpp file and in logcat Unique id is showing but How i will use this iid in cloud reco file, I m little confused about using c++ file in Cloud reco.java file ,Please tell me the solution.
What code I will have to write in Cloud Reco file to get That unique ID.
class CloudReco_UpdateCallback : public QCAR::UpdateCallback
{
virtual void QCAR_onUpdate(QCAR::State& state)
{
// Get the tracker manager:
QCAR::TrackerManager& trackerManager = QCAR::TrackerManager::getInstance();
// Get the image tracker:
QCAR::ImageTracker* imageTracker = static_cast<QCAR::ImageTracker*>(
trackerManager.getTracker(QCAR::Tracker::IMAGE_TRACKER));
// Get the target finder:
QCAR::TargetFinder* finder = imageTracker->getTargetFinder();
// Check if there are new results available:
const int statusCode = finder->updateSearchResults();
// Show a message if we encountered an error:
if (statusCode < 0)
{
showErrorMessage(statusCode, state.getFrame().getTimeStamp());
}
else if (statusCode == QCAR::TargetFinder::UPDATE_RESULTS_AVAILABLE)
{
// Process new search results
if (finder->getResultCount() > 0)
{
const QCAR::TargetSearchResult* result = finder->getResult(0);
// Check if this target is suitable for tracking:
if (result->getTrackingRating() > 0)
{
// Create a new Trackable from the result:
QCAR::Trackable* newTrackable = finder->enableTracking(*result);
if (newTrackable != 0)
{
LOG("Successfully created new trackable '%s' with rating '%d'.",
newTrackable->getName(), result->getTrackingRating());
// Checks if the targets has changed
LOG( "Comparing Strings. currentTargetId: %s lastTargetId: %s",
result->getUniqueTargetId(), lastTargetId);
// System.out.println("valueeee"+result->getUniqueTargetId());
if (strcmp(result->getUniqueTargetId(), lastTargetId) != 0)
{
// If the target has changed then regenerate the texture
// Cleaning this value indicates that the product Texture needs to be generated
// again in Java with the new Book data for the new target
deleteCurrentProductTexture = true;
// Starts the loading state for the product
renderState = RS_LOADING;
// Copies the new target Metadata
snprintf(targetMetadata, CONTENT_MAX, "%s", result->getMetaData());
// Calls the Java method with the current product texture
createProductTexture(targetMetadata);
}
else
renderState = RS_NORMAL;
// Initialize the frames to skip variable, used for waiting
// a few frames for getting the chance to tracking before
// starting the transition to 2D when there is no target
pthread_mutex_lock(&framesToSkipMutex);
framesToSkipBeforeRenderingTransition = 10;
pthread_mutex_unlock(&framesToSkipMutex);
// Initialize state variables
showAnimation3Dto2D = true;
trackingStarted = false;
// Updates the value of the current Target Id with the new target found
pthread_mutex_lock(&lastTargetIdMutex);
strcpy(lastTargetId, result->getUniqueTargetId());
pthread_mutex_unlock(&lastTargetIdMutex);
enterContentMode();
}
else
LOG("Failed to create new trackable.");
}
}
}
}
};
How to get ID cloud image target?
January 11, 2014 - 8:10am #5
Use the getUniqueTargetId() method on the TargetSearchResult instance.
See:
https://developer.vuforia.com/resources/api/ios/class_q_c_a_r_1_1_target_search_result
How to get ID cloud image target?
April 22, 2013 - 5:18am #3
Hi TokiTok,
you can definitely look at the code snippet that NalinS has shared;
in addition to what NalinS has suggested, you can also query the "unique target ID" of the cloud Target (if that's what you mean by "ID");
the code to add is just:
string uniqueID = targetSearchResult.UniqueTargetId;
This will return the unique target id generated by the Cloud when you uploaded the target.
How to get ID cloud image target?
April 22, 2013 - 3:17am #2
Hi TokiTok,
I am not quite sure what you mean by ID?
The best thing to do is to study the CloudRecoEventHandler.cs and this has a callback as shown below that is called on each new search result. Here you can check for the metadata that was uploaded for each target as a way of uniquely identifiying them.
This example is from the cloud reco sample. Over at this thread I posted up a very simple handler which simply displays an augmentation for a CloudReco target: https://developer.vuforia.com/forum/cloud-recognition/creating-my-books-json-ios
One other suggestion also is to read through the CloudReco forums as there is lots of information there and you can learn from the experiences of other developers.
HTH
N
public void OnNewSearchResult(TargetFinder.TargetSearchResult targetSearchResult)
{
// This code demonstrates how to reuse an ImageTargetBehaviour for new search results and modifying it according to the metadata
// Depending on your application, it can make more sense to duplicate the ImageTargetBehaviour using Instantiate(),
// or to create a new ImageTargetBehaviour for each new result
// Vuforia will return a new object with the right script automatically if you use
// TargetFinder.EnableTracking(TargetSearchResult result, string gameObjectName)
//Check if the metadata isn't null
if(targetSearchResult.MetaData == null)
{
return;
}
// enable the new result with the same ImageTargetBehaviour:
ImageTargetBehaviour imageTargetBehaviour = mImageTracker.TargetFinder.EnableTracking(targetSearchResult, mParentOfImageTargetTemplate);
if (imageTargetBehaviour != null)
{
// stop the target finder
mCloudRecoBehaviour.CloudRecoEnabled = false;
// Calls the TargetCreated Method of the SceneManager object to start loading
// the BookData from the JSON
mContentManager.TargetCreated(targetSearchResult.MetaData);
}
}
Please see tthis code i am not able to Extract id from this. Can u pllese just write 2 line of code . I will be thanksfull to you,,