Cfrgtkky

I try to place 3D object in marker use Jpct and Vuforia, object rendered success but not fixing in marker. I follow this tutorial — Integrating Vuforia and Jpct-ae in Android

I have this code for render 3D model, but it doesn't work how I expected, because 3D model move when phone with camera move but I set the cam.setFOV(fov), cam.setYFOV(fovy) how you can see in code, but it doesn't help me solve the problem. For greater clarity you can look at screenshot.

Image about how work code below

 public class ImageTargetRenderJpctExample implements GLSurfaceView.Renderer, SampleAppRendererControl{

    private static final String LOGTAG = "ImageTargetRenderer";



private SampleApplicationSession vuforiaAppSession;

private ImageTargets mActivity;

private SampleAppRenderer mSampleAppRenderer;



private boolean mIsActive = false;



private World world = null;

private Light sun = null;

public Object3D obj;

public Texture texture;

private FrameBuffer fb = null;

private GL10 lastGl = null;

private Camera cam;

private float modelViewMat;

private float fov;

private float fovy;



public ImageTargetRenderJpctExample(ImageTargets activity, SampleApplicationSession session)

{

    mActivity = activity;

    vuforiaAppSession = session;



    mSampleAppRenderer = new SampleAppRenderer(

            this, mActivity, Device.MODE.MODE_AR, false, -1.0f, 5);





    world = new World();

    world.setAmbientLight(200, 200, 200);



    sun = new Light(world);

    sun.setIntensity(250, 250, 250);



    Object3D object3Darray = new Object3D[0];

    try {

        object3Darray = Loader.load3DS(mActivity.getAssets().open("Audi_S3.3DS"),0.10f);

    } catch (IOException e) {

        e.printStackTrace();

    }



    obj = Object3D.mergeAll(object3Darray);

    obj.strip();

    obj.build();



    world.addObject(obj);



    cam = world.getCamera();

    obj.translate(0,0, 1.5f);



    SimpleVector sv = new SimpleVector();

    sv.set(obj.getTransformedCenter());

    sv.y -= 100;

    sv.z -= 100;

    sun.setPosition(sv);

    MemoryHelper.compact();

}



@Override

public void onDrawFrame(GL10 gl)

{

    if (!mIsActive)

        return;



    //obj.rotateZ(0.025f);



    mSampleAppRenderer.render();



    updateCamera();

    world.renderScene(fb);

    world.draw(fb);

    fb.display();

}





public void setActive(boolean active)

{

    mIsActive = active;



    if(mIsActive)

        mSampleAppRenderer.configureVideoBackground();

}





@Override

public void onSurfaceCreated(GL10 gl, EGLConfig config)

{

    vuforiaAppSession.onSurfaceCreated();

    mSampleAppRenderer.onSurfaceCreated();

}



@Override

public void onSurfaceChanged(GL10 gl, int w, int h) {

    vuforiaAppSession.onSurfaceChanged(w, h);



    mSampleAppRenderer.onConfigurationChanged(mIsActive);

    initRendering();



    if (lastGl != gl) {

        if (fb != null) {

            fb.dispose();

        }

        fb = new FrameBuffer(w, h);

        Config.viewportOffsetAffectsRenderTarget = true;



        fb.setVirtualDimensions(fb.getWidth(), fb.getHeight());

        lastGl = gl;

    } else {

        fb.resize(w, h);

        fb.setVirtualDimensions(w, h);

    }





}



private void initRendering()

{

    GLES20.glClearColor(0.0f, 0.0f, 0.0f, Vuforia.requiresAlpha() ? 0.0f : 1.0f);



    mActivity.loadingDialogHandler

            .sendEmptyMessage(LoadingDialogHandler.HIDE_LOADING_DIALOG);

}



public void updateConfiguration()

{

    mSampleAppRenderer.onConfigurationChanged(mIsActive);

    CameraCalibration camCalibration = com.vuforia.CameraDevice.getInstance().getCameraCalibration();

    Vec2F size = camCalibration.getSize();

    Vec2F focalLength = camCalibration.getFocalLength();

    float fovyRadians = (float) (2 * Math.atan(0.5f * size.getData()[1] / focalLength.getData()[1]));

    float fovRadians = (float) (2 * Math.atan(0.5f * size.getData()[0] / focalLength.getData()[0]));



    if (mSampleAppRenderer.mIsPortrait) {

        setFovy(fovRadians);

        setFov(fovyRadians);

    } else {

        setFov(fovRadians);

        setFovy(fovyRadians);

    }



    Timber.d("Updated Config called");

}



public void renderFrame(State state, float projectionMatrix)

{

    GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT | GLES20.GL_DEPTH_BUFFER_BIT);



    mSampleAppRenderer.renderVideoBackground(state);



    float modelviewArray = new float[16];



    for (int tIdx = 0; tIdx < state.getNumTrackableResults(); tIdx++) {

        TrackableResult result = state.getTrackableResult(tIdx);

        Trackable trackable = result.getTrackable();

        printUserData(trackable);



        Matrix44F modelViewMatrix = Tool.convertPose2GLMatrix(result.getPose());

        Matrix44F inverseMV = SampleMath.Matrix44FInverse(modelViewMatrix);

        Matrix44F invTranspMV = SampleMath.Matrix44FTranspose(inverseMV);



        modelviewArray = invTranspMV.getData();

        updateModelviewMatrix(modelviewArray);



    }



    if (state.getNumTrackableResults() == 0) {

        float m  = {

                1,0,0,0,

                0,1,0,0,

                0,0,1,0,

                0,0,-10000,1

        };

        modelviewArray = m;

        updateModelviewMatrix(modelviewArray);

    }



    Renderer.getInstance().end();

}



private void updateModelviewMatrix(float mat) {

    modelViewMat = mat;

}



private void printUserData(Trackable trackable)

{

    String userData = (String) trackable.getUserData();

}





private void updateCamera() {

    if (modelViewMat != null) {

        float m = modelViewMat;



        /*Matrix mat = new Matrix();

        mat.setDump(modelViewMat);

        cam.setBack(mat);*/



        final SimpleVector camUp;

        if (mSampleAppRenderer.mIsPortrait) {

            camUp = new SimpleVector(-m[0], -m[1], -m[2]);

        } else {

            camUp = new SimpleVector(-m[4], -m[5], -m[6]);

        }



        final SimpleVector camDirection = new SimpleVector(m[8], m[9], m[10]);

        final SimpleVector camPosition = new SimpleVector(m[12], m[13], m[14]);



        cam.setOrientation(camDirection, camUp);

        cam.setPosition(camPosition);



        cam.setFOV(fov);

        cam.setYFOV(fovy);

    }

}



private void setFov(float fov) {

    this.fov = fov;

}



private void setFovy(float fovy) {

    this.fovy = fovy;

}}