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

# main.cpp Example File

materials-cpp/main.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
    ** Licensees holding valid commercial Qt licenses may use this file in
    ** accordance with the commercial license agreement provided with the
    ** Software or, alternatively, in accordance with the terms contained in
    ** a written agreement between you and The Qt Company. For licensing terms
    ** and conditions see http://www.qt.io/terms-conditions. For further
    ** information use the contact form at http://www.qt.io/contact-us.
    **
    ** 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
    ** met: http://www.gnu.org/licenses/gpl-2.0.html.
    **
    ** $QT_END_LICENSE$
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    ****************************************************************************/

    #include <QGuiApplication>

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

    #include <Qt3DInput/QInputAspect>

    #include <Qt3DRenderer/QRenderAspect>
    #include <Qt3DRenderer/QPhongMaterial>
    #include <Qt3DRenderer/QDiffuseMapMaterial>
    #include <Qt3DRenderer/QForwardRenderer>
    #include <Qt3DRenderer/QFrameGraph>
    #include <Qt3DRenderer/QTextureImage>

    #include "planeentity.h"
    #include "rotatingtrefoilknot.h"
    #include "barrel.h"
    #include "houseplant.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);

        // Scene Root
        Qt3D::QEntity *sceneRoot = new Qt3D::QEntity();

        // 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 *frameGraphComponent = new Qt3D::QFrameGraph(sceneRoot);
        Qt3D::QForwardRenderer *forwardRenderer = new Qt3D::QForwardRenderer();
        forwardRenderer->setCamera(basicCamera);
        frameGraphComponent->setActiveFrameGraph(forwardRenderer);
        sceneRoot->addComponent(frameGraphComponent);

        // Scene floor
        PlaneEntity *planeEntity = new PlaneEntity(sceneRoot);
        planeEntity->mesh()->setHeight(100.0f);
        planeEntity->mesh()->setWidth(100.0f);
        planeEntity->mesh()->setMeshResolution(QSize(20, 20));

        Qt3D::QNormalDiffuseSpecularMapMaterial *normalDiffuseSpecularMapMaterial = new Qt3D::QNormalDiffuseSpecularMapMaterial();
        normalDiffuseSpecularMapMaterial->setTextureScale(10.0f);
        normalDiffuseSpecularMapMaterial->setShininess(80.0f);
        normalDiffuseSpecularMapMaterial->setAmbient(QColor::fromRgbF(0.2f, 0.2f, 0.2f, 1.0f));

        Qt3D::QTextureImage *diffuseImage = new Qt3D::QTextureImage();
        diffuseImage->setSource(QUrl(QStringLiteral("qrc:/assets/textures/pattern_09/diffuse.webp")));
        normalDiffuseSpecularMapMaterial->diffuse()->addTextureImage(diffuseImage);

        Qt3D::QTextureImage *specularImage = new Qt3D::QTextureImage();
        specularImage->setSource(QUrl(QStringLiteral("qrc:/assets/textures/pattern_09/specular.webp")));
        normalDiffuseSpecularMapMaterial->specular()->addTextureImage(specularImage);

        Qt3D::QTextureImage *normalImage = new Qt3D::QTextureImage();
        normalImage->setSource(QUrl((QStringLiteral("qrc:/assets/textures/pattern_09/normal.webp"))));
        normalDiffuseSpecularMapMaterial->normal()->addTextureImage(normalImage);

        planeEntity->addComponent(normalDiffuseSpecularMapMaterial);

        // Chest
        RenderableEntity *chest = new RenderableEntity(sceneRoot);
        chest->scaleTransform()->setScale(0.03f);
        chest->mesh()->setSource(QUrl(QStringLiteral("qrc:/assets/chest/Chest.obj")));
        Qt3D::QDiffuseMapMaterial *diffuseMapMaterial = new Qt3D::QDiffuseMapMaterial();
        diffuseMapMaterial->setSpecular(QColor::fromRgbF(0.2f, 0.2f, 0.2f, 1.0f));
        diffuseMapMaterial->setShininess(2.0f);

        Qt3D::QTextureImage *chestDiffuseImage = new Qt3D::QTextureImage();
        chestDiffuseImage->setSource(QUrl(QStringLiteral("qrc:/assets/chest/diffuse.webp")));
        diffuseMapMaterial->diffuse()->addTextureImage(chestDiffuseImage);

        chest->addComponent(diffuseMapMaterial);

        // TrefoilKnot
        RotatingTrefoilKnot *trefoil = new RotatingTrefoilKnot(sceneRoot);
        trefoil->translateTransform()->setDy(3.5);
        trefoil->scaleTransform()->setScale(0.5f);
        Qt3D::QPhongMaterial *phongMaterial = new Qt3D::QPhongMaterial();
        phongMaterial->setDiffuse(QColor(204, 205, 75)); // Safari Yellow #cccd4b
        phongMaterial->setSpecular(Qt::white);
        trefoil->addComponent(phongMaterial);

        // Barrels
        Barrel *basicBarrel = new Barrel(sceneRoot);
        basicBarrel->translateTransform()->setDx(8.0f);

        Barrel *rustyBarrel = new Barrel(sceneRoot);
        rustyBarrel->setDiffuse(Barrel::RustDiffuse);
        rustyBarrel->setSpecular(Barrel::RustSpecular);
        rustyBarrel->setBumps(Barrel::HardBumps);
        rustyBarrel->translateTransform()->setDx(10.0f);

        Barrel *blueBarrel = new Barrel(sceneRoot);
        blueBarrel->setDiffuse(Barrel::Blue);
        blueBarrel->setBumps(Barrel::MiddleBumps);
        blueBarrel->translateTransform()->setDx(12.0f);

        Barrel *greenBarrel = new Barrel(sceneRoot);
        greenBarrel->setDiffuse(Barrel::Green);
        greenBarrel->setBumps(Barrel::SoftBumps);
        greenBarrel->translateTransform()->setDx(14.0f);

        Barrel *stainlessBarrel = new Barrel(sceneRoot);
        stainlessBarrel->setDiffuse(Barrel::StainlessSteelDiffuse);
        stainlessBarrel->setBumps(Barrel::NoBumps);
        stainlessBarrel->setSpecular(Barrel::StainlessSteelSpecular);
        stainlessBarrel->setShininess(150.0f);
        stainlessBarrel->translateTransform()->setDx(16);

        // Plants
        HousePlant *squareBamboo = new HousePlant(sceneRoot);
        squareBamboo->setPotShape(HousePlant::Square);
        squareBamboo->setX(4.0f);

        HousePlant *trianglePalm = new HousePlant(sceneRoot);
        trianglePalm->setPlantType(HousePlant::Palm);
        trianglePalm->setPotShape(HousePlant::Triangle);
        trianglePalm->setZ(4.0f);

        HousePlant *spherePine = new HousePlant(sceneRoot);
        spherePine->setPlantType(HousePlant::Pine);
        spherePine->setPotShape(HousePlant::Sphere);
        spherePine->setX(-4.0f);

        HousePlant *crossSpikes = new HousePlant(sceneRoot);
        crossSpikes->setPlantType(HousePlant::Spikes);
        crossSpikes->setZ(-4.0f);

        HousePlant *crossPalm = new HousePlant(sceneRoot);
        crossPalm->setPlantType(HousePlant::Palm);
        crossPalm->setZ(-8.0f);
        crossPalm->setScale(0.05f);

        HousePlant *crossShrub = new HousePlant(sceneRoot);
        crossShrub->setPlantType(HousePlant::Shrub);
        crossShrub->setZ(8.0f);
        crossShrub->setScale(0.05f);

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

        return app.exec();
    }