qt3d/examples/dynamicscene-cpp/main.cpp

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#include <QGuiApplication>

#include <Qt3DCore/QAspectEngine>
#include <Qt3DCore/QCamera>
#include <Qt3DCore/Window>

#include <Qt3DRenderer/QRenderAspect>
#include <Qt3DRenderer/QFrameGraph>
#include <Qt3DRenderer/QForwardRenderer>

#include "forwardrenderer.h"
#include "examplescene.h"

int main(int argc, char* argv[])
{
    QGuiApplication app(argc, argv);

    Qt3D::Window view;
    Qt3D::QAspectEngine engine;
    engine.registerAspect(new Qt3D::QRenderAspect());
    engine.initialize();
    QVariantMap data;
    data.insert(QStringLiteral("surface"), QVariant::fromValue(static_cast<QSurface *>(&view)));
    data.insert(QStringLiteral("window"), QVariant::fromValue(&view));
    engine.setData(data);

    ExampleScene *sceneRoot = new ExampleScene();

    // Scene Camera
    Qt3D::QCamera *basicCamera = new Qt3D::QCamera(sceneRoot);
    basicCamera->setProjectionType(Qt3D::QCameraLens::PerspectiveProjection);
    basicCamera->setAspectRatio(view.width() / view.height());
    basicCamera->setUpVector(QVector3D(0.0f, 1.0f, 0.0f));
    basicCamera->setViewCenter(QVector3D(0.0f, 3.5f, 0.0f));
    basicCamera->setPosition(QVector3D(0.0f, 3.5f, 25.0f));
    // For camera controls
    view.setCamera(basicCamera);

    // Forward Renderer FrameGraph
    Qt3D::QFrameGraph *frameGraph = new Qt3D::QFrameGraph(sceneRoot);
    Qt3D::QForwardRenderer *forwardRenderer = new Qt3D::QForwardRenderer();
    forwardRenderer->setCamera(basicCamera);
    frameGraph->setActiveFrameGraph(forwardRenderer);
    sceneRoot->addComponent(frameGraph);

    engine.setRootEntity(sceneRoot);
    view.show();

    return app.exec();
}