[Loading PLY file using QT3D]

appdev

Hello guys,

I hope you're all doing well.

So I've looked for some examples on how to laod a ply file in Qt and found one on this forum.

int main(int argc, char* argv[])
{
    QApplication app(argc, argv);
    Qt3DExtras::Qt3DWindow *view = new Qt3DExtras::Qt3DWindow();
    view->defaultFrameGraph()->setClearColor(QColor(QRgb(0x4d4d4f)));
    QWidget *container = QWidget::createWindowContainer(view);
    QSize screenSize = view->screen()->size();
    container->setMinimumSize(QSize(200, 100));
    container->setMaximumSize(screenSize);

    QWidget *widget = new QWidget;
    QHBoxLayout *hLayout = new QHBoxLayout(widget);
    hLayout->addWidget(container, 1);

    widget->setWindowTitle(QStringLiteral("Basic shapes"));

    Qt3DInput::QInputAspect *input = new Qt3DInput::QInputAspect;
    view->registerAspect(input);

    // Root entity
    Qt3DCore::QEntity *rootEntity = new Qt3DCore::QEntity();

    // Camera
    Qt3DRender::QCamera *cameraEntity = view->camera();

    cameraEntity->lens()->setPerspectiveProjection(45.0f, 16.0f/9.0f, 0.1f, 100000.0f);
    cameraEntity->setPosition(QVector3D(-30000, 0, 20000.0f));
    cameraEntity->setUpVector(QVector3D(0, 0, 1));
    cameraEntity->setViewCenter(QVector3D(0, 0, 10000));

    Qt3DCore::QEntity *lightEntity = new Qt3DCore::QEntity(rootEntity);
    Qt3DRender::QPointLight *light = new Qt3DRender::QPointLight(lightEntity);
    light->setColor("white");
    light->setIntensity(1);
    lightEntity->addComponent(light);
    Qt3DCore::QTransform *lightTransform = new Qt3DCore::QTransform(lightEntity);
    lightTransform->setTranslation(cameraEntity->position());
    lightEntity->addComponent(lightTransform);

    //Loading .ply data
    QUrl data = QUrl::fromLocalFile("C:/Users/nahra/3DModel_qt3d/Model3D/challengone.PLY");
    qDebug() << data << data.isValid() << data.toLocalFile() << QFileInfo(data.toLocalFile()).exists() << data.fileName();

    Qt3DRender::QMesh *bodyMesh = new Qt3DRender::QMesh();
    bodyMesh->setMeshName("bodyMesh");
    bodyMesh->setSource(data);

    Qt3DCore::QTransform *bodyTransform = new Qt3DCore::QTransform;
    bodyTransform->setScale3D(QVector3D(10.0, 10.0, 10.0));

    Qt3DExtras::QPhongMaterial *bodyMaterial = new Qt3DExtras::QPhongMaterial();
    bodyMaterial->setDiffuse(QColor(QRgb(0x928327)));

    Qt3DCore::QEntity *plyEntity = new Qt3DCore::QEntity(rootEntity);
    plyEntity->addComponent(bodyMesh);
    plyEntity->addComponent(bodyMaterial);
    plyEntity->addComponent(bodyTransform);

    // Set root object of the scene
    view->setRootEntity(rootEntity);

    // Show window
    widget->show();
    widget->resize(1200, 800);

    return app.exec();
    }

However the program seems to not read the ply file since the scene is empty.

I created a qrc file in which I put the 3D model (ply file) and I'm sure the path is correct.

I don't really get what's wrong with the app.

please help.

Thank you all.

appdev

Sorry, the file name was incorrect.

Thank you again.

Have a nice day y'all.