C++ qcar::TargetFinder类代码示例

// ----------------------------------------------------------------------------
// Starts the Camera
// ----------------------------------------------------------------------------
JNIEXPORT void JNICALL
Java_com_qualcomm_QCARSamples_CloudRecognition_CloudReco_startCamera(JNIEnv *, jobject)
{
    // Initialize the camera:
    if (!QCAR::CameraDevice::getInstance().init())
    return;

    // Configure the video background
    configureVideoBackground();

    // Select the default mode:
    if (!QCAR::CameraDevice::getInstance().selectVideoMode(
                    QCAR::CameraDevice::MODE_DEFAULT))
    return;

    // Start the camera:
    if (!QCAR::CameraDevice::getInstance().start())
    return;

    // Start the tracker:
    QCAR::TrackerManager& trackerManager = QCAR::TrackerManager::getInstance();
    QCAR::ImageTracker* imageTracker = static_cast<QCAR::ImageTracker*>(
            trackerManager.getTracker(QCAR::Tracker::IMAGE_TRACKER));
    assert(imageTracker != 0);
    imageTracker->start();

    // Start cloud based recognition if we are in scanning mode:
    if(scanningMode)
    {
        QCAR::TargetFinder* targetFinder = imageTracker->getTargetFinder();
        assert (targetFinder != 0);
        crStarted = targetFinder->startRecognition();
    }
}

// ----------------------------------------------------------------------------
// Enables CloudReco Service
// ----------------------------------------------------------------------------
JNIEXPORT void JNICALL
Java_com_qualcomm_QCARSamples_CloudRecognition_CloudReco_enterScanningModeNative(JNIEnv*, jobject)
{
    QCAR::TrackerManager& trackerManager = QCAR::TrackerManager::getInstance();
    QCAR::ImageTracker* imageTracker = static_cast<QCAR::ImageTracker*>(
            trackerManager.getTracker(QCAR::Tracker::IMAGE_TRACKER));
    assert(imageTracker != 0);
    QCAR::TargetFinder* targetFinder = imageTracker->getTargetFinder();
    assert (targetFinder != 0);

    // Start CloudReco
    crStarted = targetFinder->startRecognition();

    // Clear all trackables created previously:
    targetFinder->clearTrackables();

    scanningMode = true;

    // Updates state variables
    showAnimation3Dto2D = false;
    showAnimation2Dto3D = false;
    isShowing2DOverlay = false;
    renderState = RS_SCANNING;

}

// ----------------------------------------------------------------------------
// Initialize Cloud Reco
// ----------------------------------------------------------------------------
JNIEXPORT int JNICALL
Java_com_qualcomm_QCARSamples_CloudRecognition_CloudReco_initCloudReco(JNIEnv *, jobject)
{
    LOG("Java_com_qualcomm_QCARSamples_VisualSearch_VisualSearch_initVisualSearch");

    // Get the image tracker:
    QCAR::TrackerManager& trackerManager = QCAR::TrackerManager::getInstance();
    QCAR::ImageTracker* imageTracker = static_cast<QCAR::ImageTracker*>(
            trackerManager.getTracker(QCAR::Tracker::IMAGE_TRACKER));
    assert(imageTracker != NULL);

    // Initialize visual search:
    QCAR::TargetFinder* targetFinder = imageTracker->getTargetFinder();
    assert(targetFinder != NULL);

    // Start initialization:
    if (targetFinder->startInit(kAccessKey, kSecretKey))
    {
        targetFinder->waitUntilInitFinished();
    }

    int resultCode = targetFinder->getInitState();
    if ( resultCode != QCAR::TargetFinder::INIT_SUCCESS)
    {
        LOG("Failed to initialize target finder.");
        return resultCode;
    }

    // Use the following calls if you would like to customize the color of the UI
    // targetFinder->setUIScanlineColor(1.0, 0.0, 0.0);
    // targetFinder->setUIPointColor(0.0, 0.0, 1.0);

    return resultCode;
}

JNIEXPORT void JNICALL
Java_rajawali_vuforia_RajawaliVuforiaActivity_stopCamera(JNIEnv *, jobject) {
	LOG("Java_rajawali_vuforia_RajawaliVuforiaActivity_stopCamera");

	// Stop the tracker:
	QCAR::TrackerManager& trackerManager = QCAR::TrackerManager::getInstance();
	QCAR::Tracker* markerTracker = trackerManager.getTracker(
			QCAR::MarkerTracker::getClassType());
	if (markerTracker != 0)
		markerTracker->stop();

	QCAR::ImageTracker* imageTracker =
			static_cast<QCAR::ImageTracker*>(trackerManager.getTracker(
					QCAR::ImageTracker::getClassType()));
	if (imageTracker != 0)
		imageTracker->stop();

	QCAR::CameraDevice::getInstance().stop();

	// Stop Cloud Reco:
	QCAR::TargetFinder* targetFinder = imageTracker->getTargetFinder();
	assert(targetFinder != 0);

	targetFinder->stop();

	// Clears the trackables
	targetFinder->clearTrackables();

	QCAR::CameraDevice::getInstance().deinit();

	initStateVariables();
}

//.........这里部分代码省略.........
        deleteCurrentProductTexture = false;
    }

    // If the render state indicates that the texture is generated it generates
    // the OpenGL texture for start drawing the plane with the book data
    if (renderState == RS_TEXTURE_GENERATED)
    {
        generateProductTextureInOpenGL();
    }

    // Did we find any trackables this frame?
    if (state.getNumTrackableResults() > 0)
    {
        trackingStarted = true;

        // If we are already tracking something we don't need
        // to wait any frame before starting the 2D transition
        // when the target gets lost
        pthread_mutex_lock(&framesToSkipMutex);
        framesToSkipBeforeRenderingTransition = 0;
        pthread_mutex_unlock(&framesToSkipMutex);

        // Gets current trackable result
        const QCAR::TrackableResult* trackableResult = state.getTrackableResult(0);

        if (trackableResult == NULL)
        {
            return;
        }

        modelViewMatrix = QCAR::Tool::convertPose2GLMatrix(trackableResult->getPose());

        // Get the size of the ImageTarget
        QCAR::ImageTargetResult *imageResult = (QCAR::ImageTargetResult *)trackableResult;
        targetSize = imageResult->getTrackable().getSize();

        // Renders the Augmentation View with the 3D Book data Panel
        renderAugmentation(trackableResult);

    }
    else
    {
        // Manages the 3D to 2D Transition initialization
        if (!scanningMode && showAnimation3Dto2D && renderState == RS_NORMAL
                && framesToSkipBeforeRenderingTransition == 0)
        {
            startTransitionTo2D();
        }

        // Reduces the number of frames to wait before triggering
        // the transition by 1
        if( framesToSkipBeforeRenderingTransition > 0 && renderState == RS_NORMAL)
        {
            pthread_mutex_lock(&framesToSkipMutex);
            framesToSkipBeforeRenderingTransition -= 1;
            pthread_mutex_unlock(&framesToSkipMutex);
        }

    }

    // Logic for rendering Transition to 2D
    if (renderState == RS_TRANSITION_TO_2D && showAnimation3Dto2D)
    {
        renderTransitionTo2D();
    }

    // Logic for rendering Transition to 3D
    if (renderState == RS_TRANSITION_TO_3D )
    {
        renderTransitionTo3D();
    }

    // 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();

    // Renders the current state - User process Feedback
    if (finder->isRequesting())
    {
        // Requesting State - Show Requesting text in Status Bar
        setStatusBarText("Requesting");
        showStatusBar();
    }
    else
    {
        // Hiding Status Bar
        hideStatusBar();
    }

    glDisable(GL_DEPTH_TEST);

    QCAR::Renderer::getInstance().end();

}

    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);

                        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.");
                }
            }
        }
    }

	virtual void QCAR_onUpdate(QCAR::State&) {

		if (dataSetToActivate != NULL) {
			QCAR::TrackerManager& trackerManager =
					QCAR::TrackerManager::getInstance();
			QCAR::ImageTracker* imageTracker =
					static_cast<QCAR::ImageTracker*>(trackerManager.getTracker(
							QCAR::ImageTracker::getClassType()));
			if (imageTracker == 0) {
				LOG("Failed to activate data set.");
				return;
			}
			imageTracker->activateDataSet(dataSetToActivate);

			if(isExtendedTrackingActivated)
			{
				for (int tIdx = 0; tIdx < dataSetToActivate->getNumTrackables(); tIdx++)
				{
					QCAR::Trackable* trackable = dataSetToActivate->getTrackable(tIdx);
					trackable->startExtendedTracking();
				}
			}

			dataSetToActivate = NULL;
		}

		if (scanningMode) {
			QCAR::TrackerManager& trackerManager =
					QCAR::TrackerManager::getInstance();
			QCAR::ImageTracker* imageTracker =
					static_cast<QCAR::ImageTracker*>(trackerManager.getTracker(
							QCAR::ImageTracker::getClassType()));

			// Get the target finder:
			QCAR::TargetFinder* targetFinder = imageTracker->getTargetFinder();

			// Check if there are new results available:
			const int statusCode = targetFinder->updateSearchResults();

			if (statusCode < 0) {
				char errorMessage[80];
				LOG(errorMessage, "Error with status code %d", statusCode);
			} else if (statusCode
					== QCAR::TargetFinder::UPDATE_RESULTS_AVAILABLE) {
				// Process new search results
				if (targetFinder->getResultCount() > 0) {
					const QCAR::TargetSearchResult* result =
							targetFinder->getResult(0);

					// Check if this target is suitable for tracking:
					if (result->getTrackingRating() > 0) {
						// Create a new Trackable from the result:
						QCAR::Trackable* newTrackable =
								targetFinder->enableTracking(*result);

						if (newTrackable != 0) {
							LOG(
									"Successfully created new trackable '%s' with rating '%d'.",

									newTrackable->getName(), result->getTrackingRating());

							if (strcmp(result->getUniqueTargetId(),
									lastTargetId) != 0) {
								// Copies the new target Metadata
								snprintf(targetMetadata, CONTENT_MAX, "%s",
										result->getMetaData());
								//LOG(targetMetadata);

							}

							strcpy(lastTargetId, result->getUniqueTargetId());

							// Stop Cloud Reco scanning
							targetFinder->stop();

							scanningMode = false;
						}
					}
				}
			}
		}
	}