main.cpp Example File | Qt 3D 5.12.11

- Qt 5.12
- Qt 3D
- Qt 3D: Basic Shapes C++ Example
- main.cpp Example File
- Qt 5.12.11 Reference Documentation

# main.cpp Example File

basicshapes-cpp/main.cpp

     /****************************************************************************
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     #include "scenemodifier.h"

     #include <QGuiApplication>

     #include <Qt3DRender/qcamera.h>
     #include <Qt3DCore/qentity.h>
     #include <Qt3DRender/qcameralens.h>

     #include <QtWidgets/QApplication>
     #include <QtWidgets/QWidget>
     #include <QtWidgets/QHBoxLayout>
     #include <QtWidgets/QCheckBox>
     #include <QtWidgets/QCommandLinkButton>
     #include <QtGui/QScreen>

     #include <Qt3DInput/QInputAspect>

     #include <Qt3DExtras/qtorusmesh.h>
     #include <Qt3DRender/qmesh.h>
     #include <Qt3DRender/qtechnique.h>
     #include <Qt3DRender/qmaterial.h>
     #include <Qt3DRender/qeffect.h>
     #include <Qt3DRender/qtexture.h>
     #include <Qt3DRender/qrenderpass.h>
     #include <Qt3DRender/qsceneloader.h>
     #include <Qt3DRender/qpointlight.h>

     #include <Qt3DCore/qtransform.h>
     #include <Qt3DCore/qaspectengine.h>

     #include <Qt3DRender/qrenderaspect.h>
     #include <Qt3DExtras/qforwardrenderer.h>

     #include <Qt3DExtras/qt3dwindow.h>
     #include <Qt3DExtras/qfirstpersoncameracontroller.h>

     int main(int argc, char **argv)
     {
         QApplication app(argc, argv);
         Qt3DExtras::Qt3DWindow *view = new Qt3DExtras::Qt3DWindow();
         view->defaultFrameGraph()->setClearColor(QColor(QRgb(0x4d4d4f)));
         QWidget *container = QWidget::createWindowContainer(view);
         QSize screenSize = view->screen()->size();
         container->setMinimumSize(QSize(200, 100));
         container->setMaximumSize(screenSize);

         QWidget *widget = new QWidget;
         QHBoxLayout *hLayout = new QHBoxLayout(widget);
         QVBoxLayout *vLayout = new QVBoxLayout();
         vLayout->setAlignment(Qt::AlignTop);
         hLayout->addWidget(container, 1);
         hLayout->addLayout(vLayout);

         widget->setWindowTitle(QStringLiteral("Basic shapes"));

         Qt3DInput::QInputAspect *input = new Qt3DInput::QInputAspect;
         view->registerAspect(input);

         // Root entity
         Qt3DCore::QEntity *rootEntity = new Qt3DCore::QEntity();

         // Camera
         Qt3DRender::QCamera *cameraEntity = view->camera();

         cameraEntity->lens()->setPerspectiveProjection(45.0f, 16.0f/9.0f, 0.1f, 1000.0f);
         cameraEntity->setPosition(QVector3D(0, 0, 20.0f));
         cameraEntity->setUpVector(QVector3D(0, 1, 0));
         cameraEntity->setViewCenter(QVector3D(0, 0, 0));

         Qt3DCore::QEntity *lightEntity = new Qt3DCore::QEntity(rootEntity);
         Qt3DRender::QPointLight *light = new Qt3DRender::QPointLight(lightEntity);
         light->setColor("white");
         light->setIntensity(1);
         lightEntity->addComponent(light);
         Qt3DCore::QTransform *lightTransform = new Qt3DCore::QTransform(lightEntity);
         lightTransform->setTranslation(cameraEntity->position());
         lightEntity->addComponent(lightTransform);

         // For camera controls
         Qt3DExtras::QFirstPersonCameraController *camController = new Qt3DExtras::QFirstPersonCameraController(rootEntity);
         camController->setCamera(cameraEntity);

         // Scenemodifier
         SceneModifier *modifier = new SceneModifier(rootEntity);

         // Set root object of the scene
         view->setRootEntity(rootEntity);

         // Create control widgets
         QCommandLinkButton *info = new QCommandLinkButton();
         info->setText(QStringLiteral("Qt3D ready-made meshes"));
         info->setDescription(QString::fromLatin1("Qt3D provides several ready-made meshes, like torus, cylinder, cone, "
                                                  "cube, plane and sphere."));
         info->setIconSize(QSize(0,0));

         QCheckBox *torusCB = new QCheckBox(widget);
         torusCB->setChecked(true);
         torusCB->setText(QStringLiteral("Torus"));

         QCheckBox *coneCB = new QCheckBox(widget);
         coneCB->setChecked(true);
         coneCB->setText(QStringLiteral("Cone"));

         QCheckBox *cylinderCB = new QCheckBox(widget);
         cylinderCB->setChecked(true);
         cylinderCB->setText(QStringLiteral("Cylinder"));

         QCheckBox *cuboidCB = new QCheckBox(widget);
         cuboidCB->setChecked(true);
         cuboidCB->setText(QStringLiteral("Cuboid"));

         QCheckBox *planeCB = new QCheckBox(widget);
         planeCB->setChecked(true);
         planeCB->setText(QStringLiteral("Plane"));

         QCheckBox *sphereCB = new QCheckBox(widget);
         sphereCB->setChecked(true);
         sphereCB->setText(QStringLiteral("Sphere"));

         vLayout->addWidget(info);
         vLayout->addWidget(torusCB);
         vLayout->addWidget(coneCB);
         vLayout->addWidget(cylinderCB);
         vLayout->addWidget(cuboidCB);
         vLayout->addWidget(planeCB);
         vLayout->addWidget(sphereCB);

         QObject::connect(torusCB, &QCheckBox::stateChanged,
                          modifier, &SceneModifier::enableTorus);
         QObject::connect(coneCB, &QCheckBox::stateChanged,
                          modifier, &SceneModifier::enableCone);
         QObject::connect(cylinderCB, &QCheckBox::stateChanged,
                          modifier, &SceneModifier::enableCylinder);
         QObject::connect(cuboidCB, &QCheckBox::stateChanged,
                          modifier, &SceneModifier::enableCuboid);
         QObject::connect(planeCB, &QCheckBox::stateChanged,
                          modifier, &SceneModifier::enablePlane);
         QObject::connect(sphereCB, &QCheckBox::stateChanged,
                          modifier, &SceneModifier::enableSphere);

         torusCB->setChecked(true);
         coneCB->setChecked(true);
         cylinderCB->setChecked(true);
         cuboidCB->setChecked(true);
         planeCB->setChecked(true);
         sphereCB->setChecked(true);

         // Show window
         widget->show();
         widget->resize(1200, 800);

         return app.exec();
     }