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

This is how I did it on Qt5.10. This example shows a scene with a cuboid. Scene you can than use like a button or so... To use this add QT += 3dextras to your project file.

szene.h

#ifndef SCENE_H
#define SCENE_H

#include 
#include 

class Scene
      : public QWidget
{
    Q_OBJECT

private:
    QWidget *container;

public:
    explicit Scene(QWidget *parent = nullptr);

protected:
    // reimplementation needed to handle resize events
    // http://doc.qt.io/qt-5/qwidget.html#resizeEvent
    void
    resizeEvent ( QResizeEvent * event );

public slots:
    void
    resizeView(QSize size);
};

#endif // SCENE_H

scene.cpp

#include "scene.h"

#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 

Scene::Scene(QWidget *parent)
   : QWidget(parent)
{
    auto view = new Qt3DExtras::Qt3DWindow();

    // create a container for Qt3DWindow
    container = createWindowContainer(view,this);

    // background color
    view->defaultFrameGraph()->setClearColor(QColor(QRgb(0x575757)));

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

    // Camera
    auto camera = new Camera(rootEntity,view);
    auto cameraEntity = view->camera();

    cameraEntity->setPosition(QVector3D(0, 0, 50.0f));
    cameraEntity->setUpVector(QVector3D(0, 1, 0));
    cameraEntity->setViewCenter(QVector3D(0, 0, 0));

    // Cuboid
    auto cuboidMesh = new Qt3DExtras::QCuboidMesh();

    // CuboidMesh Transform
    auto cuboidTransform = new Qt3DCore::QTransform();
    cuboidTransform->setScale(10.0f);
    cuboidTransform->setTranslation(QVector3D(0.0f, 0.0f, 0.0f));
    cuboidTransform->setRotation(QQuaternion(1,1.5,1,0).normalized());

    auto cuboidMaterial = new Qt3DExtras::QPhongMaterial();
    cuboidMaterial->setDiffuse(QColor(QRgb(0x005FFF)));

    // assamble entity
    auto cuboidEntity = new Qt3DCore::QEntity(rootEntity);
    cuboidEntity->addComponent(cuboidMesh);
    cuboidEntity->addComponent(cuboidMaterial);
    cuboidEntity->addComponent(cuboidTransform);

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

void
Scene::resizeView(QSize size)
{
    container->resize(size);
}

void
Scene::resizeEvent ( QResizeEvent * /*event*/ )
{
  resizeView(this->size());
}