diff --git a/Core/Code/Rendering/mitkSurfaceVtkMapper2D.cpp b/Core/Code/Rendering/mitkSurfaceVtkMapper2D.cpp
index 9a0ebb9d36..ffa3f2dc27 100644
--- a/Core/Code/Rendering/mitkSurfaceVtkMapper2D.cpp
+++ b/Core/Code/Rendering/mitkSurfaceVtkMapper2D.cpp
@@ -1,336 +1,336 @@
 /*===================================================================
 
 The Medical Imaging Interaction Toolkit (MITK)
 
 Copyright (c) German Cancer Research Center,
 Division of Medical and Biological Informatics.
 All rights reserved.
 
 This software is distributed WITHOUT ANY WARRANTY; without
 even the implied warranty of MERCHANTABILITY or FITNESS FOR
 A PARTICULAR PURPOSE.
 
 See LICENSE.txt or http://www.mitk.org for details.
 
 ===================================================================*/
 
 #include "mitkSurfaceVtkMapper2D.h"
 
 //mitk includes
 #include <mitkDataNode.h>
 #include <mitkProperties.h>
 #include "mitkVtkPropRenderer.h"
 #include <mitkSurface.h>
 #include <mitkLookupTableProperty.h>
 #include <mitkVtkScalarModeProperty.h>
 #include <mitkCoreServices.h>
 #include <mitkIPropertyAliases.h>
 #include <mitkIPropertyDescriptions.h>
 
 //vtk includes
 #include <vtkActor.h>
 #include <vtkCutter.h>
 #include <vtkLookupTable.h>
 #include <vtkPlane.h>
 #include <vtkPolyData.h>
 #include <vtkPropAssembly.h>
 #include <vtkPointData.h>
 
 #include <vtkGlyph3D.h>
 #include <vtkReverseSense.h>
 #include <vtkArrowSource.h>
 #include <mitkIOUtil.h>
 
 // constructor LocalStorage
 mitk::SurfaceVtkMapper2D::LocalStorage::LocalStorage()
 {
   m_Mapper = vtkSmartPointer<vtkPolyDataMapper>::New();
   m_Mapper->ScalarVisibilityOff();
   m_Actor = vtkSmartPointer<vtkActor>::New();
   m_Actor->SetMapper( m_Mapper );
   m_PropAssembly = vtkSmartPointer <vtkPropAssembly>::New();
   m_PropAssembly->AddPart( m_Actor );
   m_CuttingPlane = vtkSmartPointer<vtkPlane>::New();
   m_Cutter = vtkSmartPointer<vtkCutter>::New();
   m_Cutter->SetCutFunction(m_CuttingPlane);
   m_Mapper->SetInputConnection( m_Cutter->GetOutputPort() );
 
   m_NormalGlyph = vtkSmartPointer<vtkGlyph3D>::New();
 
   m_InverseNormalGlyph = vtkSmartPointer<vtkGlyph3D>::New();
 
   // Source for the glyph filter
   m_ArrowSource = vtkSmartPointer<vtkArrowSource>::New();
   //set small default values for fast/fluent rendering
   m_ArrowSource->SetTipRadius(0.05);
   m_ArrowSource->SetTipLength(0.20);
   m_ArrowSource->SetTipResolution(5);
   m_ArrowSource->SetShaftResolution(5);
   m_ArrowSource->SetShaftRadius(0.01);
 
   m_NormalGlyph->SetSourceConnection(m_ArrowSource->GetOutputPort());
   m_NormalGlyph->SetVectorModeToUseNormal();
   m_NormalGlyph->OrientOn();
 
   m_InverseNormalGlyph->SetSourceConnection(m_ArrowSource->GetOutputPort());
   m_InverseNormalGlyph->SetVectorModeToUseNormal();
   m_InverseNormalGlyph->OrientOn();
 
   m_NormalMapper = vtkSmartPointer<vtkPolyDataMapper>::New();
   m_NormalMapper->SetInputConnection(m_NormalGlyph->GetOutputPort());
   m_NormalMapper->ScalarVisibilityOff();
 
   m_InverseNormalMapper = vtkSmartPointer<vtkPolyDataMapper>::New();
   m_InverseNormalMapper->SetInputConnection(m_NormalGlyph->GetOutputPort());
   m_InverseNormalMapper->ScalarVisibilityOff();
 
   m_NormalActor = vtkSmartPointer<vtkActor>::New();
   m_NormalActor->SetMapper(m_NormalMapper);
 
   m_InverseNormalActor = vtkSmartPointer<vtkActor>::New();
   m_InverseNormalActor->SetMapper(m_InverseNormalMapper);
 
   m_ReverseSense = vtkSmartPointer<vtkReverseSense>::New();
 
   m_PropAssembly->AddPart( m_NormalActor );
 }
 
 // destructor LocalStorage
 mitk::SurfaceVtkMapper2D::LocalStorage::~LocalStorage()
 {
 }
 
 const mitk::Surface* mitk::SurfaceVtkMapper2D::GetInput() const
 {
   return static_cast<const mitk::Surface * > ( GetDataNode()->GetData() );
 }
 
 // constructor PointSetVtkMapper2D
 mitk::SurfaceVtkMapper2D::SurfaceVtkMapper2D()
 {
 }
 
 mitk::SurfaceVtkMapper2D::~SurfaceVtkMapper2D()
 {
 }
 
 // reset mapper so that nothing is displayed e.g. toggle visiblity of the propassembly
 void mitk::SurfaceVtkMapper2D::ResetMapper( BaseRenderer* renderer )
 {
   LocalStorage *ls = m_LSH.GetLocalStorage(renderer);
   ls->m_PropAssembly->VisibilityOff();
 }
 
 vtkProp* mitk::SurfaceVtkMapper2D::GetVtkProp(mitk::BaseRenderer * renderer)
 {
   LocalStorage *ls = m_LSH.GetLocalStorage(renderer);
   return ls->m_PropAssembly;
 }
 
 void mitk::SurfaceVtkMapper2D::Update(mitk::BaseRenderer* renderer)
 {
   const mitk::DataNode* node = GetDataNode();
   if( node == NULL )
     return;
   bool visible = true;
   node->GetVisibility(visible, renderer, "visible");
   if ( !visible )
     return;
 
   mitk::Surface* surface  = static_cast<mitk::Surface *>( node->GetData() );
   if ( surface == NULL )
     return;
 
   // Calculate time step of the input data for the specified renderer (integer value)
   this->CalculateTimeStep( renderer );
 
   // Check if time step is valid
   const mitk::TimeGeometry *dataTimeGeometry = surface->GetTimeGeometry();
   if ( ( dataTimeGeometry == NULL )
        || ( dataTimeGeometry->CountTimeSteps() == 0 )
        || ( !dataTimeGeometry->IsValidTimeStep( this->GetTimestep() ) ) )
   {
     return;
   }
 
   surface->UpdateOutputInformation();
   LocalStorage* localStorage = m_LSH.GetLocalStorage(renderer);
 
   //check if something important has changed and we need to rerender
   if ( (localStorage->m_LastUpdateTime < node->GetMTime()) //was the node modified?
        || (localStorage->m_LastUpdateTime < surface->GetPipelineMTime()) //Was the data modified?
        || (localStorage->m_LastUpdateTime < renderer->GetCurrentWorldPlaneGeometryUpdateTime()) //was the geometry modified?
        || (localStorage->m_LastUpdateTime < renderer->GetCurrentWorldPlaneGeometry()->GetMTime())
        || (localStorage->m_LastUpdateTime < node->GetPropertyList()->GetMTime()) //was a property modified?
        || (localStorage->m_LastUpdateTime < node->GetPropertyList(renderer)->GetMTime()) )
   {
     this->GenerateDataForRenderer( renderer );
   }
 
   // since we have checked that nothing important has changed, we can set
   // m_LastUpdateTime to the current time
   localStorage->m_LastUpdateTime.Modified();
 }
 
 void mitk::SurfaceVtkMapper2D::GenerateDataForRenderer( mitk::BaseRenderer *renderer )
 {
-  mitk::DataNode* node = GetDataNode();
-  mitk::Surface* surface  = static_cast<mitk::Surface *>( node->GetData() );
-  const mitk::TimeGeometry *dataTimeGeometry = surface->GetTimeGeometry();
+  const DataNode* node = GetDataNode();
+  Surface* surface  = static_cast<Surface *>( node->GetData() );
+  const TimeGeometry *dataTimeGeometry = surface->GetTimeGeometry();
   LocalStorage* localStorage = m_LSH.GetLocalStorage(renderer);
 
   ScalarType time =renderer->GetTime();
   int timestep=0;
 
-  if( time > itk::NumericTraits<mitk::ScalarType>::NonpositiveMin() )
+  if( time > itk::NumericTraits<ScalarType>::NonpositiveMin() )
     timestep = dataTimeGeometry->TimePointToTimeStep( time );
 
   vtkSmartPointer<vtkPolyData> inputPolyData = surface->GetVtkPolyData( timestep );
   if((inputPolyData==NULL) || (inputPolyData->GetNumberOfPoints() < 1 ))
     return;
 
   //apply color and opacity read from the PropertyList
   this->ApplyAllProperties(renderer);
 
   const PlaneGeometry* planeGeometry = renderer->GetCurrentWorldPlaneGeometry();
   if( ( planeGeometry == NULL ) || ( !planeGeometry->IsValid() ) || ( !planeGeometry->HasReferenceGeometry() ))
   {
     return;
   }
 
   double origin[3];
   origin[0] = planeGeometry->GetOrigin()[0];
   origin[1] = planeGeometry->GetOrigin()[1];
   origin[2] = planeGeometry->GetOrigin()[2];
 
   double normal[3];
   normal[0] = planeGeometry->GetNormal()[0];
   normal[1] = planeGeometry->GetNormal()[1];
   normal[2] = planeGeometry->GetNormal()[2];
 
   localStorage->m_CuttingPlane->SetOrigin(origin);
   localStorage->m_CuttingPlane->SetNormal(normal);
 
   localStorage->m_Cutter->SetInputData(inputPolyData);
   localStorage->m_Cutter->Update();
 
   bool generateNormals = false;
   node->GetBoolProperty("draw normals 2D", generateNormals);
   if(generateNormals)
   {
     localStorage->m_NormalGlyph->SetInputConnection( localStorage->m_Cutter->GetOutputPort() );
     localStorage->m_NormalGlyph->Update();
 
     localStorage->m_NormalMapper->SetInputConnection( localStorage->m_NormalGlyph->GetOutputPort() );
 
     localStorage->m_PropAssembly->AddPart( localStorage->m_NormalActor );
   }
   else
   {
     localStorage->m_NormalGlyph->SetInputConnection( NULL );
     localStorage->m_PropAssembly->RemovePart( localStorage->m_NormalActor );
   }
 
   bool generateInverseNormals = false;
   node->GetBoolProperty("invert normals", generateInverseNormals);
   if(generateInverseNormals)
   {
 
     localStorage->m_ReverseSense->SetInputConnection( localStorage->m_Cutter->GetOutputPort() );
     localStorage->m_ReverseSense->ReverseCellsOff();
     localStorage->m_ReverseSense->ReverseNormalsOn();
 
     localStorage->m_InverseNormalGlyph->SetInputConnection( localStorage->m_ReverseSense->GetOutputPort() );
     localStorage->m_InverseNormalGlyph->Update();
 
     localStorage->m_InverseNormalMapper->SetInputConnection( localStorage->m_InverseNormalGlyph->GetOutputPort() );
 
     localStorage->m_PropAssembly->AddPart( localStorage->m_InverseNormalActor );
   }
   else
   {
     localStorage->m_ReverseSense->SetInputConnection( NULL );
     localStorage->m_PropAssembly->RemovePart( localStorage->m_InverseNormalActor );
   }
 }
 
 void mitk::SurfaceVtkMapper2D::ApplyAllProperties(mitk::BaseRenderer* renderer)
 {
-  DataNode * node = GetDataNode();
+  const DataNode * node = GetDataNode();
 
   if(node == NULL)
   {
     return;
   }
 
   float lineWidth = 1.0f;
   node->GetFloatProperty("line width", lineWidth, renderer);
 
   LocalStorage* localStorage = m_LSH.GetLocalStorage(renderer);
 
   // check for color and opacity properties, use it for rendering if they exists
   float color[3]= { 1.0f, 1.0f, 1.0f };
   node->GetColor(color, renderer, "color");
   float opacity = 1.0f;
   node->GetOpacity(opacity, renderer, "opacity");
 
   //Pass properties to VTK
   localStorage->m_Actor->GetProperty()->SetColor(color[0], color[1], color[2]);
   localStorage->m_Actor->GetProperty()->SetOpacity(opacity);
   localStorage->m_NormalActor->GetProperty()->SetOpacity(opacity);
   localStorage->m_InverseNormalActor->GetProperty()->SetOpacity(opacity);
   localStorage->m_Actor->GetProperty()->SetLineWidth(lineWidth);
   //By default, the cutter will also copy/compute normals of the cut
   //to the output polydata. The normals will influence the
   //vtkPolyDataMapper lightning. To view a clean cut the lighting has
   //to be disabled.
   localStorage->m_Actor->GetProperty()->SetLighting(0);
 
   bool scalarVisibility = false;
   node->GetBoolProperty("scalar visibility", scalarVisibility);
   localStorage->m_Mapper->SetScalarVisibility(scalarVisibility);
 
   //color for inverse normals
   float inverseNormalsColor[3]= { 1.0f, 0.0f, 0.0f };
   node->GetColor(inverseNormalsColor, renderer, "back color");
   localStorage->m_InverseNormalActor->GetProperty()->SetColor(inverseNormalsColor[0],
       inverseNormalsColor[1], inverseNormalsColor[2]);
 
   //color for normals
   float normalsColor[3]= { 0.0f, 1.0f, 0.0f };
   node->GetColor(normalsColor, renderer, "front color");
   localStorage->m_NormalActor->GetProperty()->SetColor(normalsColor[0],
       normalsColor[1], normalsColor[2]);
 
   //normals scaling
   float normalScaleFactor = 10.0f;
   node->GetFloatProperty( "front normal lenth (px)", normalScaleFactor, renderer );
   localStorage->m_NormalGlyph->SetScaleFactor(normalScaleFactor);
 
   //inverse normals scaling
   float inverseNormalScaleFactor = 10.0f;
   node->GetFloatProperty( "back normal lenth (px)", inverseNormalScaleFactor, renderer );
   localStorage->m_InverseNormalGlyph->SetScaleFactor(inverseNormalScaleFactor);
 }
 
 void mitk::SurfaceVtkMapper2D::SetDefaultProperties(mitk::DataNode* node, mitk::BaseRenderer* renderer, bool overwrite)
 {
   mitk::IPropertyAliases* aliases = mitk::CoreServices::GetPropertyAliases();
   node->AddProperty( "line width", FloatProperty::New(2.0f), renderer, overwrite );
   aliases->AddAlias( "line width", "Surface.2D.Line Width", "Surface");
   node->AddProperty( "scalar mode", VtkScalarModeProperty::New(), renderer, overwrite );
   node->AddProperty( "draw normals 2D", BoolProperty::New(false), renderer, overwrite );
   aliases->AddAlias( "draw normals 2D", "Surface.2D.Draw Normals", "Surface");
   node->AddProperty( "invert normals", BoolProperty::New(false), renderer, overwrite );
   aliases->AddAlias( "invert normals", "Surface.2D.Draw Inverse Normals", "Surface");
   node->AddProperty( "front color", ColorProperty::New(0.0, 1.0, 0.0), renderer, overwrite );
   aliases->AddAlias( "front color", "Surface.2D.Normals Color", "Surface");
   node->AddProperty( "back color", ColorProperty::New(1.0, 0.0, 0.0), renderer, overwrite );
   aliases->AddAlias( "back color", "Surface.2D.Inverse Normals Color", "Surface");
   node->AddProperty( "front normal lenth (px)", FloatProperty::New(10.0), renderer, overwrite );
   aliases->AddAlias( "front normal lenth (px)", "Surface.2D.Normals Scale Factor", "Surface");
   node->AddProperty( "back normal lenth (px)", FloatProperty::New(10.0), renderer, overwrite );
   aliases->AddAlias( "back normal lenth (px)", "Surface.2D.Inverse Normals Scale Factor", "Surface");
   node->AddProperty( "layer", IntProperty::New(100), renderer, overwrite);
   Superclass::SetDefaultProperties(node, renderer, overwrite);
 }