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

# boxentity.cpp Example File

dynamicscene-cpp/boxentity.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.
    **
    ** $QT_BEGIN_LICENSE:LGPL3$
    ** Commercial License Usage
    ** Licensees holding valid commercial Qt licenses may use this file in
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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
    ** Software Foundation and appearing in the file LICENSE.GPL included in
    ** the packaging of this file. Please review the following information to
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    ****************************************************************************/

    #include "boxentity.h"

    #include <qmath.h>

    BoxEntity::BoxEntity(QNode *parent)
        : Qt3D::QEntity(parent)
        , m_transform(new Qt3D::QTransform())
        , m_translate(new Qt3D::QTranslateTransform())
        , m_mesh(new Qt3D::QCuboidMesh())
        , m_material(new Qt3D::QPhongMaterial())
        , m_angle(0.0f)
        , m_radius(1.0f)
    {
        m_transform->addTransform(m_translate);

        connect(m_material, SIGNAL(diffuseChanged()), this, SIGNAL(diffuseColorChanged()));
        m_material->setAmbient(Qt::gray);
        m_material->setSpecular(Qt::white);
        m_material->setShininess(150.0f);

        addComponent(m_transform);
        addComponent(m_mesh);
        addComponent(m_material);
    }

    void BoxEntity::setDiffuseColor(const QColor &diffuseColor)
    {
        m_material->setDiffuse(diffuseColor);
    }

    void BoxEntity::setAngle(float arg)
    {
        if (m_angle == arg)
            return;

        m_angle = arg;
        emit angleChanged();
        updateTransformation();
    }

    void BoxEntity::setRadius(float arg)
    {
        if (m_radius == arg)
            return;

        m_radius = arg;
        emit radiusChanged();
        updateTransformation();
    }

    QColor BoxEntity::diffuseColor()
    {
        return m_material->diffuse();
    }

    float BoxEntity::angle() const
    {
        return m_angle;
    }

    float BoxEntity::radius() const
    {
        return m_radius;
    }

    void BoxEntity::updateTransformation()
    {
        m_translate->setTranslation(QVector3D(qCos(m_angle) * m_radius,
                                              1.0f,
                                              qSin(m_angle) * m_radius));
    }