- Qt 5.5
- Qt3D Module
- Qt3D: Dynamic Scene C++ Example
- main.cpp Example File
- Qt 5.5.1 Reference Documentation

# main.cpp Example File

dynamicscene-cpp/main.cpp

    /****************************************************************************
    **
    ** Copyright (C) 2015 Klaralvdalens Datakonsult AB (KDAB).
    ** Contact: http://www.qt-project.org/legal
    **
    ** This file is part of the Qt3D module of the Qt Toolkit.
    **
    ** $QT_BEGIN_LICENSE:LGPL3$
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    ** GNU Lesser General Public License Usage
    ** Alternatively, this file may be used under the terms of the GNU Lesser
    ** General Public License version 3 as published by the Free Software
    ** Foundation and appearing in the file LICENSE.LGPLv3 included in the
    ** packaging of this file. Please review the following information to
    ** ensure the GNU Lesser General Public License version 3 requirements
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    ** GNU General Public License Usage
    ** Alternatively, this file may be used under the terms of the GNU
    ** General Public License version 2.0 or later as published by the Free
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    #include <QGuiApplication>

    #include <window.h>
    #include <Qt3DCore/QAspectEngine>
    #include <Qt3DCore/QCamera>

    #include <Qt3DInput/QInputAspect>

    #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);

        Window view;
        Qt3D::QAspectEngine engine;
        engine.registerAspect(new Qt3D::QRenderAspect());
        Qt3D::QInputAspect *input = new Qt3D::QInputAspect;
        engine.registerAspect(input);
        engine.initialize();
        QVariantMap data;
        data.insert(QStringLiteral("surface"), QVariant::fromValue(static_cast<QSurface *>(&view)));
        data.insert(QStringLiteral("eventSource"), 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
        input->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();
    }