main.cpp Example File

basicshapes-cpp/main.cpp

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  #include "scenemodifier.h"

  #include <QGuiApplication>

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

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

  #include <Qt3DInput/QInputAspect>

  #include <Qt3DRender/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 <Qt3DCore/qtransform.h>
  #include <Qt3DCore/qaspectengine.h>

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

  int main(int argc, char **argv)
  {
      QApplication app(argc, argv);
      Window *view = new Window();
      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"));

      Qt3DCore::QAspectEngine engine;
      engine.registerAspect(new Qt3DRender::QRenderAspect());
      Qt3DInput::QInputAspect *input = new Qt3DInput::QInputAspect;
      engine.registerAspect(input);
      QVariantMap data;
      data.insert(QStringLiteral("surface"), QVariant::fromValue(static_cast<QSurface *>(view)));
      data.insert(QStringLiteral("eventSource"), QVariant::fromValue(view));
      engine.setData(data);

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

      // Camera
      Qt3DCore::QCamera *cameraEntity = new Qt3DCore::QCamera(rootEntity);
      cameraEntity->setObjectName(QStringLiteral("cameraEntity"));

      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));
      input->setCamera(cameraEntity);

      // FrameGraph
      Qt3DRender::QFrameGraph *frameGraph = new Qt3DRender::QFrameGraph();
      Qt3DRender::QForwardRenderer *forwardRenderer = new Qt3DRender::QForwardRenderer();

      forwardRenderer->setCamera(cameraEntity);
      forwardRenderer->setClearColor(QColor(QRgb(0x4d4d4f)));
      frameGraph->setActiveFrameGraph(forwardRenderer);

      // Setting the FrameGraph
      rootEntity->addComponent(frameGraph);

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

      // Set root object of the scene
      engine.setRootEntity(rootEntity);

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

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

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

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

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

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

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

      // Update the aspect ratio
      QSize widgetSize =  container->size();
      float aspectRatio = float(widgetSize.width()) / float(widgetSize.height());
      cameraEntity->lens()->setPerspectiveProjection(45.0f, aspectRatio, 0.1f, 1000.0f);

      return app.exec();
  }