main.cpp Example File

cylinder-cpp/main.cpp

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  #include <QGuiApplication>

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

  #include <Qt3DInput/QInputAspect>

  #include <Qt3DRender/qcylindermesh.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 <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)
  {
      QGuiApplication app(argc, argv);

      Window view;
      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();

      // TechiqueFilter and renderPassFilter are not implement yet
      forwardRenderer->setCamera(cameraEntity);
      forwardRenderer->setClearColor(Qt::black);

      frameGraph->setActiveFrameGraph(forwardRenderer);

      // Cylinder shape data
      Qt3DRender::QCylinderMesh *cylinder = new Qt3DRender::QCylinderMesh();
      cylinder->setRadius(1);
      cylinder->setLength(3);
      cylinder->setRings(100);
      cylinder->setSlices(20);

      // CylinderMesh Transform
      Qt3DCore::QTransform *cylinderTransform = new Qt3DCore::QTransform;
      cylinderTransform->setScale(1.5f);
      cylinderTransform->setRotation(QQuaternion::fromAxisAndAngle(QVector3D(1, 0, 0), 45.0f));

      // Cylinder
      Qt3DCore::QEntity *cylinderEntity = new Qt3DCore::QEntity(rootEntity);
      cylinderEntity->addComponent(cylinder);
      cylinderEntity->addComponent(cylinderTransform);

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

      // Set root object of the scene
      engine.setRootEntity(rootEntity);
      // Show window
      view.show();

      return app.exec();
  }