Qt 5.8 | Qt 3D | Qt 3D: Basic Shapes C++ Example | main.cpp Example File

Qt 5.8.0 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();
      }