main.cpp Example File

cpp_example/main.cpp

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  #include <QGuiApplication>

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

  #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 <Qt3DRender/qcameraselector.h>
  #include <Qt3DRender/qrenderpassfilter.h>
  #include <Qt3DRender/qtechniquefilter.h>
  #include <Qt3DRender/qviewport.h>
  #include <Qt3DRender/qrenderaspect.h>
  #include <Qt3DRender/qframegraph.h>
  #include <Qt3DRender/qclearbuffer.h>

  int main(int ac, char **av)
  {
      QGuiApplication app(ac, av);

      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();
      rootEntity->setObjectName(QStringLiteral("rootEntity"));
      // Torus
      Qt3DCore::QEntity *torusEntity = new Qt3DCore::QEntity(rootEntity);

      // Torus shape data
      Qt3DRender::QTorusMesh *torus = new Qt3DRender::QTorusMesh();
      torus->setRadius(40);
      torus->setMinorRadius(15);

      torusEntity->addComponent(torus);

      // TorusMesh Transform
      Qt3DCore::QTransform *torusTransforms = new Qt3DCore::QTransform();
      torusTransforms->setTranslation(QVector3D(-5.0f, 3.5f, 2.0f));
      torusTransforms->setRotation(QQuaternion::fromAxisAndAngle(QVector3D(1, 0, 0), 35.0f));
      torusEntity->addComponent(torusTransforms);

      // Scene file
      Qt3DCore::QEntity *sceneEntity = new Qt3DCore::QEntity(rootEntity);
      Qt3DRender::QSceneLoader *scene = new Qt3DRender::QSceneLoader();
      scene->setObjectName(QStringLiteral("scene"));
      Qt3DCore::QTransform *sceneTransform = new Qt3DCore::QTransform();
      sceneTransform->setTranslation(QVector3D(2.5f, 0.5f, -10.0f));
      sceneEntity->addComponent(sceneTransform);
      scene->setSource(QUrl("qrc:/assets/test_scene.dae"));
      sceneEntity->addComponent(scene);

      // Camera
      Qt3DCore::QCamera *cameraEntity = new Qt3DCore::QCamera(rootEntity);
      cameraEntity->setObjectName(QStringLiteral("cameraEntity"));
      cameraEntity->lens()->setPerspectiveProjection(60.0f, 16.0f/9.0f, 0.1f, 1000.0f);
      cameraEntity->setPosition(QVector3D(-5, 0, -20.0f));
      cameraEntity->setViewCenter(QVector3D(11, 0, 5));
      cameraEntity->setUpVector(QVector3D(0, 1, 0));
      input->setCamera(cameraEntity);

      // FrameGraph
      Qt3DRender::QFrameGraph *frameGraph = new Qt3DRender::QFrameGraph();
      Qt3DRender::QTechniqueFilter *techniqueFilter = new Qt3DRender::QTechniqueFilter();
      Qt3DRender::QViewport *viewport = new Qt3DRender::QViewport(techniqueFilter);
      Qt3DRender::QClearBuffer *clearBuffer = new Qt3DRender::QClearBuffer(viewport);
      Qt3DRender::QCameraSelector *cameraSelector = new Qt3DRender::QCameraSelector(clearBuffer);
      (void) new Qt3DRender::QRenderPassFilter(cameraSelector);

      // TechiqueFilter and renderPassFilter are not implement yet
      viewport->setRect(QRectF(0, 0, 1, 1));
      clearBuffer->setBuffers(Qt3DRender::QClearBuffer::ColorDepthBuffer);
      cameraSelector->setCamera(cameraEntity);
      frameGraph->setActiveFrameGraph(techniqueFilter);

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

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

      return app.exec();
  }