Method RotateObject

Modules/DataTypesExt/src/mitkAffineImageCropperInteractor.cpp:218–261

}

void mitk::AffineImageCropperInteractor::RotateObject(StateMachineAction *, InteractionEvent *interactionEvent)
{
  auto *positionEvent = dynamic_cast<InteractionPositionEvent *>(interactionEvent);
  if (positionEvent == nullptr)
    return;

  Point2D currentPickedDisplayPoint = positionEvent->GetPointerPositionOnScreen();
  if (currentPickedDisplayPoint.EuclideanDistanceTo(m_InitialPickedDisplayPoint) < 1)
    return;

  vtkRenderer *currentVtkRenderer = interactionEvent->GetSender()->GetVtkRenderer();

  if (currentVtkRenderer && currentVtkRenderer->GetActiveCamera())
  {
    double vpn[3];
    currentVtkRenderer->GetActiveCamera()->GetViewPlaneNormal(vpn);

    Vector3D rotationAxis;
    rotationAxis[0] = vpn[0];
    rotationAxis[1] = vpn[1];
    rotationAxis[2] = vpn[2];
    rotationAxis.Normalize();

    Vector2D move = currentPickedDisplayPoint - m_InitialPickedDisplayPoint;

    double rotationAngle = -57.3 * atan(move[0] / move[1]);
    if (move[1] < 0)
      rotationAngle += 180;

    // Use center of data bounding box as center of rotation
    Point3D rotationCenter = m_OriginalGeometry->GetCenter();
    if (positionEvent->GetSender()->GetMapperID() == BaseRenderer::Standard2D)
      rotationCenter = m_InitialPickedPoint;

    // Reset current Geometry3D to original state (pre-interaction) and
    // apply rotation
    RotationOperation op(OpROTATE, rotationCenter, rotationAxis, rotationAngle);
    Geometry3D::Pointer newGeometry = static_cast<Geometry3D *>(m_OriginalGeometry->Clone().GetPointer());
    newGeometry->ExecuteOperation(&op);
    m_SelectedNode->GetData()->SetGeometry(newGeometry);

    RenderingManager::GetInstance()->RequestUpdateAll();
  }
}