How to render in Qt3D in standard GUI application?

Question

I enjoy using Qt3D, but all of the examples I see for it are full window applications. What I can\'t understand from the examples is how to add a qt3d rendering window to a

Answer 1

You can subclass QGLView class which extends QGLWidget with support for 3D viewing:

class GLView : public QGLView
{
    Q_OBJECT

public:
    GLView(QWidget *parent = 0);
    ~GLView();

protected:
    void initializeGL(QGLPainter *painter);
    void paintGL(QGLPainter *painter);

private:
    QGLAbstractScene *m_scene;
    QGLSceneNode *m_rootNode;
};

GLView::GLView(QWidget *parent)
    : QGLView(parent)
    , m_scene(0)
    , m_rootNode(0)
{
    // Viewing Volume
    camera()->setFieldOfView(25);
    camera()->setNearPlane(1);
    camera()->setFarPlane(1000);

    // Position of the camera
    camera()->setEye(QVector3D(0, 3, 4));

    // Direction that the camera is pointing
    camera()->setCenter(QVector3D(0, 3, 0));
}

GLView::~GLView()
{
    delete m_scene;
}

void GLView::initializeGL(QGLPainter *painter)
{
    // Background color
    painter->setClearColor(QColor(70, 70, 70));

    // Load the 3d model from the file
    m_scene = QGLAbstractScene::loadScene("models/model1/simplemodel.obj");

    m_rootNode = m_scene->mainNode();
}

void GLView::paintGL(QGLPainter *painter)
{
    m_rootNode->draw(painter);
}

Qt 5.1 introduces the function QWidget::createWindowContainer(). A function that creates a QWidget wrapper for an existing QWindow, allowing it to live inside a QWidget-based application. You can use QWidget::createWindowContainer which creates a QWindow in a QWidget. This allows placing QWindow-subclasses in Widget-Layouts. This way you can embed your QGLView inside a widget.