mitk: mitkSurfaceInteractor.cpp Source File

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00001 /*=========================================================================
00002 
00003 Program:   Medical Imaging & Interaction Toolkit
00004 Language:  C++
00005 Date:      $Date$
00006 Version:   $Revision: $
00007 
00008 Copyright (c) German Cancer Research Center, Division of Medical and
00009 Biological Informatics. All rights reserved.
00010 See MITKCopyright.txt or https://www.mitk.org/copyright.html for details.
00011 
00012 This software is distributed WITHOUT ANY WARRANTY; without even
00013 the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
00014 PURPOSE.  See the above copyright notices for more information.
00015 
00016 =========================================================================*/
00017 
00018 
00019 #include "mitkSurfaceInteractor.h"
00020 #include "mitkPointLocator.h"
00021 #include "mitkSurface.h"
00022 
00023 #include "mitkStateEvent.h"
00024 #include "mitkInteractionConst.h"
00025 #include "mitkBaseRenderer.h"
00026 
00027 #include <vtkPolyData.h>
00028 
00029 mitk::SurfaceInteractor::SurfaceInteractor(const char * type, DataNode* dataNode)
00030 : AffineInteractor(type, dataNode)
00031 {
00032   m_PtLoc = PLocType::New();
00033 }
00034 
00035 
00036 float mitk::SurfaceInteractor::CanHandleEvent( StateEvent const* stateEvent ) const
00037 {
00038   float jd = 0.0f;
00039 
00040   if( ! ( stateEvent->GetEvent()->GetButtonState() == mitk::BS_ControlButton && stateEvent->GetEvent()->GetType() == mitk::Type_MouseButtonPress ))
00041     return jd;
00042 
00043   if ( stateEvent->GetEvent()->GetSender()->GetMapperID() == mitk::BaseRenderer::Standard3D )
00044     return jd;
00045 
00046   mitk::Surface* surf = dynamic_cast<mitk::Surface*>(this->GetData());
00047   if (surf)
00048   {
00049     mitk::DisplayPositionEvent const *event = dynamic_cast <const mitk::DisplayPositionEvent *> (stateEvent->GetEvent());
00050     mitk::PointSet::PointType pt = event->GetWorldPosition();
00051 
00052     // Use ANN to get the point of the polydata closest to the world event
00053     if( surf->GetVtkPolyData(m_TimeStep) == NULL ) itkExceptionMacro(<< "No polydata at this time step!");
00054     m_PtLoc->SetPoints(dynamic_cast<vtkPointSet*>(surf->GetVtkPolyData(m_TimeStep)));
00055     mitk::PointLocator::DistanceType dst = m_PtLoc->GetMinimalDistance(pt);
00056 
00057     mitk::BaseRenderer* ren = stateEvent->GetEvent()->GetSender();
00058 
00059     // Get the diameter of the render window bounding box
00060     mitk::DataStorage* storage = ren->GetDataStorage();
00061     mitk::BoundingBox::Pointer bb = storage->ComputeBoundingBox();
00062     mitk::BoundingBox::AccumulateType dia = std::sqrt(bb->GetDiagonalLength2());
00063 
00064     if (dia > 0.00001) //if diameter not zero
00065     {
00066       float verh = dst/dia;
00067       if (verh>1) verh = 1; //if dst is bigger than dia, then set to 1
00068       //now inverse (0 = bad and 1 = good) and set between 0.5 and 1
00069       jd = ((1-verh)/2)+0.5f;
00070     }
00071   }
00072   return jd;
00073 }