Qt3D & QSlider

[Silenzio76]

Greetings,

I wrote this piece of code to render my Obj file:

Qt3DCore::QEntity * add3dElements(Qt3DExtras::Qt3DWindow *view){
    Qt3DCore::QEntity *eRoot = new Qt3DCore::QEntity;

    Qt3DRender::QCamera *cCam = view->camera();
    /*cCam->lens()->setPerspectiveProjection(45.0f, 16.0f/9.0f, 0.1f, 1000.0f);
    cCam->setPosition(QVector3D(0, 0, 8.0f));
    cCam->setUpVector(QVector3D(0, 1, 0));
    cCam->setViewCenter(QVector3D(0, 0, 0));*/
    cCam->lens()->setPerspectiveProjection(45.0f, 16.0f/9.0f, 0.1f, 1000.0f);
    cCam->setProjectionType(Qt3DRender::QCameraLens::PerspectiveProjection);
    cCam->setAspectRatio(view->width() / view->height());
    cCam->setUpVector(QVector3D(0.0f, 1.0f, 0.0f));
    //cCam->setViewCenter(QVector3D(0.04f, 1.0f, 0.0f));
    cCam->setViewCenter(QVector3D(0, 0, 0));
    //cCam->setPosition(QVector3D(0.0f, 2.5f, 2.1f));
    cCam->setPosition(QVector3D(0, 0, 8.0f));
    cCam->setNearPlane(0.001f);
    cCam->setFarPlane(100.0f);

    Qt3DExtras::QOrbitCameraController *camController = new Qt3DExtras::QOrbitCameraController();
    camController->setCamera(cCam);


    Qt3DCore::QEntity *eLight = new Qt3DCore::QEntity(eRoot);

    Qt3DRender::QPointLight *plPoint = new Qt3DRender::QPointLight(eLight);
    plPoint->setColor("silver");
    plPoint->setIntensity(2);
    eLight->addComponent(plPoint);

    Qt3DCore::QTransform *tLightMng = new Qt3DCore::QTransform(eLight);
    tLightMng->setTranslation(cCam->position());
    eLight->addComponent(tLightMng);

    Qt3DCore::QEntity *eModel = new Qt3DCore::QEntity(eRoot);
    Qt3DRender::QMesh *mModel = new Qt3DRender::QMesh();
    mModel->setSource(QUrl("qrc:/truck"));

    Qt3DExtras::QPhongMaterial *pmModel = new Qt3DExtras::QPhongMaterial();
    pmModel->setDiffuse(QColor(Qt::lightGray));



    Qt3DCore::QTransform *tModelMng = new Qt3DCore::QTransform();
    tModelMng->setScale(0.45f);
    tModelMng->setRotation(QQuaternion::fromEulerAngles(0.0, 0.0, 0.0));

    eModel->addComponent(mModel);
    eModel->addComponent(tModelMng);
    eModel->addComponent(pmModel);


    view->setRootEntity(eRoot);
    return eRoot;
};

It's possible link c++ via 3 QSlider to the QCamera or the QTransform component to manage Pitch, Yaw and Zoom?
Did code's samples exist to do that?

Thank you in advance

[SGaist]

Hi,

This example shows how to use QCheckBoxes but you'll get the idea on how to mix controls and a Qt3D scene.

[Silenzio76]

the problem is to link the "tModelMng->setRotation(QQuaternion::fromEulerAngles(0.0, 0.0, 0.0));"

to the QSlider/QDial to set the rotation and zoom, like Qt 3D: Scene2D QML Example, but in c++ code, not to retrieve the "Enabled" property.

[SGaist]

Don't link them directly, link your sliders to a slot where you call tModelMng->setRotation(QQuaternion::fromEulerAngles(pitchSlider->value(), yawSlider->value(), rollSlider->value()));.

[Silenzio76]

Already tryed, not works!
How can retrieve the QTransform Obj?
I had tryed iteration, dynamic casting, but nothing seems to work

[SGaist]

Can you provide a minimal compilable example that shows what you are trying to achieve ?

[Silenzio76]

@SGaist to the function above add:

int main(int argc, char **argv)
{
    QApplication app(argc, argv);
    //keypad global management
    

    QWidget *widget = new QWidget;
     QVBoxLayout *vSceneLayout = new QVBoxLayout();
    QWidget *wSpacer = new QWidget();
   wSpacer->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Maximum);
    QLabel *lbPitch = new QLabel("Pitch rot.");
    QDial *dPicth = new QDial();
    dPicth->setMaximum(36000);
    dPicth->setValue(0);
    QLabel *lbYaw = new QLabel("Yaw rot.");
    QDial *dYaw = new QDial();
    dYaw->setMaximum(36000);
    dYaw->setValue(0);
    QLabel *lbZoom = new QLabel("Zoom");
    QSlider *sZoom = new QSlider(Qt::Horizontal);
    sZoom->setTickInterval(10);
    sZoom->setValue(45);
    sZoom->setMinimum(0);
    sZoom->setMaximum(10000);
    setSliderStyle(sZoom);
    QHBoxLayout *hlCmd = new QHBoxLayout();
    hlCmd->addWidget(wSpacer);
    hlCmd->addWidget(lbPitch);
    hlCmd->addWidget(dPicth);
    hlCmd->addWidget(lbYaw);
    hlCmd->addWidget(dYaw);
    hlCmd->addWidget(lbZoom);
    hlCmd->addWidget(sZoom);

    Qt3DExtras::Qt3DWindow *view = new Qt3DExtras::Qt3DWindow();
    view->defaultFrameGraph()->setClearColor(QColor(QRgb(0x4d4d4f)));
    Qt3DCore::QEntity *scene = add3dElements(view);

Qt3DCore::QTransform *meshTrans = new Qt3DCore::QTransform(scene);
    QObject::connect(dPitch, &QDial::valueChanged, [=] (float) {
        meshTrans->setRotationX(dPitch->value()/100);
        scene->addComponent(meshTrans);
    });

    QObject::connect(dYaw, &QDial::valueChanged, [=] (float) {
        meshTrans->setRotationY(dYaw->value()/100);
        scene->addComponent(meshTrans);
    });
       
    view->setRootEntity(scene);
    QWidget *container = QWidget::createWindowContainer(view);

    vSceneLayout->addWidget(container, 1);
    vSceneLayout->addLayout(hlCmd);
    hLayout->addLayout(vSceneLayout, 1);

    widget->setWindowState(Qt::WindowMaximized);
    widget->setGeometry(QGuiApplication::screens().at(0)->availableGeometry());

    widget->show();




    return app.exec();
}

[SGaist]

Can you also share the obj file you load ?

[Silenzio76]

You can get any object around
https://www.turbosquid.com/Search/3D-Models/free/obj

I'm working on the zoom slider not on the model

[SGaist]

Would it be possible to have complete working minimal buildable sample code ?
The two put together don't build out of the box and I'm currently getting only a grey zone.

[Silenzio76]

@SGaist
play/change this line to a value lesser of 1(ex.0.45f)

 Qt3DCore::QTransform *tModelMng = new Qt3DCore::QTransform();
**==>> tModelMng->setScale(0.45f);**
 tModelMng->setRotation(QQuaternion::fromEulerAngles(45.0f,30.0f, 0.0f));

[0_1559129464565_build-CargoAssistant-Desktop_Qt_5_12_0_MinGW_64_bit-Debug.7z.001](Uploading 100%) [0_1559129533552_build-CargoAssistant-Desktop_Qt_5_12_0_MinGW_64_bit-Debug.7z.002](Uploading 100%)

[SGaist]

I meant just the code so I can build it here.

[Silenzio76]

@SGaist [0_1559220017289_CargoAssistant.7z](Uploading 100%)
the system not permits me to upload !
tryed today and yesterday(not enough priviledge)!

[arsinte_andrei]

@Silenzio76 have you ever hear of git? try it.. is for your own good

[Silenzio76]

@arsinte_andrei never used mais voilà https://github.com/silenzio76/cargo

[Silenzio76]

can noone help me?

[jsulm]

@Silenzio76 You still did not upload code as @SGaist asked you.
You should not try to upload it here as it does not work.
Upload it to some file sharing service and put the link here.

[arsinte_andrei]

@Silenzio76 said in Qt3D & QSlider:

https://github.com/silenzio76/cargo

this is where hi post the code
in the github