- Qt 5.5
- Qt3D Module
- Qt3D: Basic Shapes C++ Example
- scenemodifier.cpp Example File
- Qt 5.5.1 Reference Documentation

# scenemodifier.cpp Example File

basicshapes-cpp/scenemodifier.cpp

    /****************************************************************************
    **
    ** Copyright (C) 2014 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
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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
    ** will be met: https://www.gnu.org/licenses/lgpl.html.
    **
    ** 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
    ** ensure the GNU General Public License version 2.0 requirements will be
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    ****************************************************************************/

    #include "scenemodifier.h"

    #include <QtCore/QDebug>

    SceneModifier::SceneModifier(Qt3D::QEntity *rootEntity)
        : m_rootEntity(rootEntity)
    {

        // Torus shape data
        m_torus = new Qt3D::QTorusMesh();
        m_torus->setRadius(1.0f);
        m_torus->setMinorRadius(0.4f);
        m_torus->setRings(100);
        m_torus->setSlices(20);

        // TorusMesh Transform
        Qt3D::QScaleTransform *torusScale = new Qt3D::QScaleTransform();
        Qt3D::QTranslateTransform *torusTranslation = new Qt3D::QTranslateTransform();
        Qt3D::QRotateTransform *torusRotation = new Qt3D::QRotateTransform();
        Qt3D::QTransform *torusTransforms = new Qt3D::QTransform();

        torusScale->setScale3D(QVector3D(2.0f, 2.0f, 2.0f));
        torusTranslation->setTranslation(QVector3D(1.7f, 1.7f, 0.0f));
        torusRotation->setAngleDeg(25.0f);
        torusRotation->setAxis(QVector3D(0, 1, 0));

        torusTransforms->addTransform(torusRotation);
        torusTransforms->addTransform(torusTranslation);
        torusTransforms->addTransform(torusScale);

        Qt3D::QPhongMaterial *torusMaterial = new Qt3D::QPhongMaterial();
        torusMaterial->setDiffuse(QColor(QRgb(0xbeb32b)));

        // Torus
        m_torusEntity = new Qt3D::QEntity(m_rootEntity);
        m_torusEntity->addComponent(m_torus);
        m_torusEntity->addComponent(torusMaterial);
        m_torusEntity->addComponent(torusTransforms);

        // Cylinder shape data
        Qt3D::QCylinderMesh *cylinder = new Qt3D::QCylinderMesh();
        cylinder->setRadius(1);
        cylinder->setLength(3);
        cylinder->setRings(100);
        cylinder->setSlices(20);

        // CylinderMesh Transform
        Qt3D::QScaleTransform *cylinderScale = new Qt3D::QScaleTransform();
        Qt3D::QRotateTransform *cylinderRotation = new Qt3D::QRotateTransform();
        Qt3D::QTranslateTransform *cylinderTranslation = new Qt3D::QTranslateTransform();
        Qt3D::QTransform *cylinderTransforms = new Qt3D::QTransform();

        cylinderScale->setScale3D(QVector3D(1.5f, 1.5f, 1.5f));
        cylinderTranslation->setTranslation(QVector3D(-2.6f, 2.4f, -1.5));
        cylinderRotation->setAngleDeg(45.0f);
        cylinderRotation->setAxis(QVector3D(1, 0, 0));

        cylinderTransforms->addTransform(cylinderTranslation);
        cylinderTransforms->addTransform(cylinderRotation);
        cylinderTransforms->addTransform(cylinderScale);

        Qt3D::QPhongMaterial *cylinderMaterial = new Qt3D::QPhongMaterial();
        cylinderMaterial->setDiffuse(QColor(QRgb(0x928327)));

        // Cylinder
        m_cylinderEntity = new Qt3D::QEntity(m_rootEntity);
        m_cylinderEntity->addComponent(cylinder);
        m_cylinderEntity->addComponent(cylinderMaterial);
        m_cylinderEntity->addComponent(cylinderTransforms);

        // Cuboid shape data
        Qt3D::QCuboidMesh *cuboid = new Qt3D::QCuboidMesh();

        // CuboidMesh Transform
        Qt3D::QScaleTransform *cuboidScale = new Qt3D::QScaleTransform();
        Qt3D::QTranslateTransform *cuboidTranslation = new Qt3D::QTranslateTransform();
        Qt3D::QTransform *cuboidTransforms = new Qt3D::QTransform();

        cuboidScale->setScale3D(QVector3D(4.0f, 4.0f, 4.0f));
        cuboidTranslation->setTranslation(QVector3D(0.9f, -0.9f, 0.0f));

        cuboidTransforms->addTransform(cuboidTranslation);
        cuboidTransforms->addTransform(cuboidScale);

        Qt3D::QPhongMaterial *cuboidMaterial = new Qt3D::QPhongMaterial();
        cuboidMaterial->setDiffuse(QColor(QRgb(0x665423)));

        //Cuboid
        m_cuboidEntity = new Qt3D::QEntity(m_rootEntity);
        m_cuboidEntity->addComponent(cuboid);
        m_cuboidEntity->addComponent(cuboidMaterial);
        m_cuboidEntity->addComponent(cuboidTransforms);

        // Sphere shape data
        Qt3D::QSphereMesh *sphereMesh = new Qt3D::QSphereMesh();
        sphereMesh->setRings(20);
        sphereMesh->setSlices(20);
        sphereMesh->setRadius(2);

        // Sphere mesh transform
        Qt3D::QScaleTransform *sphereScale = new Qt3D::QScaleTransform();
        Qt3D::QTranslateTransform *sphereTranslation = new Qt3D::QTranslateTransform();
        Qt3D::QTransform *sphereTransforms = new Qt3D::QTransform();

        sphereScale->setScale3D(QVector3D(1.3f, 1.3f, 1.3f));
        sphereTranslation->setTranslation(QVector3D(-2.9f, -2.9f, 0.0f));

        sphereTransforms->addTransform(sphereTranslation);
        sphereTransforms->addTransform(sphereScale);

        Qt3D::QPhongMaterial *sphereMaterial = new Qt3D::QPhongMaterial();
        sphereMaterial->setDiffuse(QColor(QRgb(0xa69929)));

        // Sphere
        m_sphereEntity = new Qt3D::QEntity(m_rootEntity);
        m_sphereEntity->addComponent(sphereMesh);
        m_sphereEntity->addComponent(sphereMaterial);
        m_sphereEntity->addComponent(sphereTransforms);
    }

    SceneModifier::~SceneModifier()
    {
    }

    void SceneModifier::enableTorus(bool enabled)
    {
        m_torusEntity->setParent(enabled ? m_rootEntity : Q_NULLPTR);
    }

    void SceneModifier::enableCylinder(bool enabled)
    {
        m_cylinderEntity->setParent(enabled ? m_rootEntity : Q_NULLPTR);
    }

    void SceneModifier::enableCuboid(bool enabled)
    {
        m_cuboidEntity->setParent(enabled ? m_rootEntity : Q_NULLPTR);
    }

    void SceneModifier::enableSphere(bool enabled)
    {
        m_sphereEntity->setParent(enabled ? m_rootEntity : Q_NULLPTR);
    }