Checkerboard.cxx

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/*=========================================================================

Program:   vtkINRIA3D
Module:    $Id: Checkerboard.cxx,v 1.19 2011/02/08 21:07:53 hawle Exp $
Language:  C++
Author:    $Author: hawle $
Date:      $Date: 2011/02/08 21:07:53 $
Version:   $Revision: 1.19 $

Copyright (c) 2007 INRIA - Asclepios Project. All rights reserved.
See Copyright.txt for details.

This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE.  See the above copyright notices for more information.

=========================================================================*/
#include "Checkerboard.h"

#include "vtkInteractorObserver.h"
#include "vtkInteractorStyleSwitch.h"
#include "vtkRenderer.h"
#include "vtkRenderWindow.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkRendererCollection.h"
#include "vtkProp.h"
#include "vtkTextActor.h"
#include "vtkCoordinate.h"
#include "vtkProperty.h"
#include "vtkProperty2D.h"
#include "vtkTextProperty.h"
#include <vtkCornerAnnotation.h>
#include <vtkLightCollection.h>
#include <vtkLight.h>
#include "vtkOrientationAnnotation.h"

#include "assert.h"
#include <iostream>
#include <sstream>
#include <cmath>

#include "NIREPvtkViewImage2DCommand.h"
#include "vtkViewImage2DFullCommand.h"
#include "NIREPvtkInteractorStyleImage2D.h"
#include "vtkCamera.h"
#include "vtkImageReslice.h"
#include "vtkRenderWindow.h"
#include "vtkTransform.h"
#include "vtkImageMapToWindowLevelColors.h"
#include "vtkImageMapToColors.h"
#include "vtkImageActor.h"
#include "vtkImageData.h"
#include "vtkActor.h"
#include "vtkPolyDataMapper.h"
#include "vtkLineSource.h"
#include "vtkLookupTable.h"
#include "vtkImageBlendWithMask.h"
#include "vtkImageBlend.h"
#include <vtkPolyDataMapper2D.h>
#include <vtkActor2D.h>

#include <vtkColorTransferFunction.h>
#include <vtkDataArray.h>
#include <vtkPointData.h>
#include <vtkCellData.h>
#include <vtkExtractGeometry.h>
#include <vtkDataSet.h>
#include <vtkUnstructuredGrid.h>
#include <vtkDataSetMapper.h>
#include <vtkPlane.h>
#include <vtkPlaneCollection.h>
#include <vtkPolyDataMapper2D.h>
#include <vtkActor2D.h>
#include <vtkClipDataSet.h>
#include <vtkCutter.h>
#include <vtkBox.h>
#include <vtkPolyDataWriter.h>
#include <vtkPolyDataNormals.h>
#include <vtkTransform.h>
#include <vtkMath.h>
#include <vtkRulerWidget.h>

//Jeffrey Hawley added this
#include "vtkCheckerboardWidget.h"
#include "vtkImageCheckerboard.h"
#include "vtkCheckerboardRepresentation.h"
//end of addition

vtkCxxRevisionMacro(Checkerboard, "$Revision: 1.19 $");
vtkStandardNewMacro(Checkerboard);


Checkerboard::Checkerboard():NIREPvtkViewImage2D()
{
  //Jeffrey Hawley added this
  this->SecondImage = NULL;
  this->CheckerboardWidget = vtkCheckerboardWidget::New();
  this->ImageCheckerboard = vtkImageCheckerboard::New();
  this->CheckerboardRepresentation = vtkCheckerboardRepresentation::New();
  this->ImageCheckerboard->SetNumberOfDivisions(2,2,1);
  //end of addition

  this->ImageResliceTwo     = vtkImageReslice::New();

  this->CheckerboardRepresentation->SetImageActor(this->ImageActor);
  this->CheckerboardRepresentation->SetCheckerboard(this->ImageCheckerboard);

  this->CheckerboardWidget->SetCurrentRenderer(this->GetRenderer());
  
  this->CheckerboardWidget->SetRepresentation(this->CheckerboardRepresentation);

  //for some reason if we take this out, then the image does not show up
  //I wonder if this will work
  this->GetWindowLevel()->Delete();
  this->WindowLevel      = vtkImageMapToColors::New();
  this->ImageReslice->SetInputConnection( this->WindowLevel->GetOutputPort() );


  this->WindowLevelTwo      = vtkImageMapToColors::New();
  this->MaskFilterTwo    = vtkImageBlendWithMask::New();

 
  this->ImageResliceTwo->SetOutputDimensionality(2);
  this->ImageResliceTwo->InterpolateOff();
  this->ImageResliceTwo->SetInputConnection( this->WindowLevelTwo->GetOutputPort() );
  

  this->AuxInputTwo     = this->WindowLevelTwo->GetOutput();
  this->ResliceInputTwo = this->WindowLevelTwo->GetOutput();



 
}


Checkerboard::~Checkerboard()
{
  this->CheckerboardWidget->EnabledOff();
  this->CheckerboardWidget->Delete();
  this->ImageCheckerboard->Delete();
  this->CheckerboardRepresentation->Delete();
  
  this->WindowLevelTwo->Delete();
  this->ImageResliceTwo->Delete();
  this->SecondImage->UnRegister(this);

  this->MaskFilterTwo->Delete();
}

//void Checkerboard::InternalUpdate()
//{
//  this->UpdateImageActor();
//  //this->UpdatePosition();
//  this->InitializeImagePositionAndSize();
//  
//  //  this->UpdatePosition();
//  
//}


//void Checkerboard::Initialize()
//{
//  this->Superclass::Initialize();
//
//  if (this->GetRenderer())
//  {
//    this->GetRenderer()->TwoSidedLightingOff();
//  }
//  
//
//}


void Checkerboard::UpdateImageActor()
{
  if(!this->SecondImage)
  {
    return;
  }
  if( !this->GetImage()  )
  {
    return;
  }


  //Since the image is already in ImageCheckerboard we just have
  //to do some updating of the ImageCheckerboard and pass
  //the information to the ImageActor.
  this->ImageReslice->GetOutput()->UpdateInformation();
  this->ImageResliceTwo->GetOutput()->UpdateInformation();
  this->ImageCheckerboard->GetOutput()->UpdateInformation();
  this->ImageActor->GetInput()->SetUpdateExtent(this->ImageCheckerboard->GetOutput()->GetWholeExtent());
  this->ImageActor->SetDisplayExtent(this->ImageCheckerboard->GetOutput()->GetWholeExtent());
  
  this->FirstRender = 1;
}



//Changes:
//-Will need to do two ImagesReslices
void Checkerboard::UpdatePosition ()
{
  if(!this->SecondImage)
  {
    return;
  }
  if( !this->GetImage() )
  {
    return;
  }
  
  double x=0;
  double y=0;
  double max_x=0;
  double max_y=0;
  double min_x=0;
  double min_y=0;
  double pos[4];

  this->GetCurrentPoint(pos);
  pos[3] = 0.0;

  double* spacing = this->GetImage()->GetSpacing();
  double* origin  = this->GetImage()->GetOrigin();

  // check if pos lies inside image bounds
  //if( pos[0]<imBounds[0] || pos[0]>imBounds[1] ||
  //    pos[1]<imBounds[2] || pos[1]>imBounds[3] ||
  //    pos[2]<imBounds[4] || pos[2]>imBounds[5])
  //{
  //  // we are outside image bounds
  //  return;
  //}

// round to the nearest integer slice
  pos[0] = vtkMath::Round ((pos[0]-origin[0])/spacing[0] )*spacing[0]+origin[0];
  pos[1] = vtkMath::Round ((pos[1]-origin[1])/spacing[1] )*spacing[1]+origin[1];
  pos[2] = vtkMath::Round ((pos[2]-origin[2])/spacing[2] )*spacing[2]+origin[2];

  /*
    double *bounds = this->ImageActor->GetBounds();
    min_x = bounds[0];
    max_x = bounds[1];
    min_y = bounds[2];
    max_y = bounds[3];
  */

  double min_bounds[4] = { this->GetWholeMinPosition(0),
                           this->GetWholeMinPosition(1),
                           this->GetWholeMinPosition(2),
                           0.0 };

  double max_bounds[4] = { this->GetWholeMaxPosition(0),
                           this->GetWholeMaxPosition(1),
                           this->GetWholeMaxPosition(2),
                           0.0 };
  

  // new efficient way to get the reslice origin and the axis coordinates.
  double reslice[4], pos2[4];
  this->ScreenToRealWorldMatrix->MultiplyPoint (pos, reslice);
  this->ImageReslice->SetResliceAxesOrigin(reslice[0], reslice[1], reslice[2]);
  this->ImageResliceTwo->SetResliceAxesOrigin(reslice[0], reslice[1], reslice[2]);


  vtkMatrix4x4* mat = vtkMatrix4x4::New();
  vtkMatrix4x4::Transpose (this->OrientationMatrix, mat);
  mat->MultiplyPoint (pos, pos2);
  mat->MultiplyPoint (min_bounds, min_bounds);
  mat->MultiplyPoint (max_bounds, max_bounds);
  mat->Delete();

  x = pos2[0];
  y = pos2[1];

  max_x = max_bounds[0];
  max_y = max_bounds[1];
  
  min_x = min_bounds[0];
  min_y = min_bounds[1];

  this->HorizontalLineSource->SetPoint1(min_x, y, 0.001);
  this->HorizontalLineSource->SetPoint2(max_x, y, 0.001);   
  this->VerticalLineSource->SetPoint1(x, min_y, 0.001);   
  this->VerticalLineSource->SetPoint2(x, max_y, 0.001);

  this->ImageReslice->Update(); // needed to update input Extent
  this->ImageResliceTwo->Update();
 
  int imCoor[3];
  this->GetCurrentVoxelCoordinates(imCoor);
  int dims[3];
  this->GetImage()->GetDimensions (dims);
      
  std::ostringstream os2;
  std::ostringstream os;
  //os << "Slice: ";

  os2 << "Zoom: " << this->GetZoom()*100.0 << " \%\n";
    
  switch( this->Orientation )
  {
      case NIREPvtkViewImage::AXIAL_ID :
        os << "Image size: " << dims[0] << " x " << dims[1] << "\n";
        os << "Voxel size: " << spacing[0] << " x " << spacing[1] << "\n";
        //os << imCoor[2] << " / " << dims[2]-1 << std::endl;
        os << "X: " << imCoor[0] << " px Y: " << imCoor[1] << " px Value: "
           << this->GetCurrentPointDoubleValue() << std::endl;
        os << "X: " << pos[0] << " mm Y: " << pos[1] << " mm\n";
        if ( this->ShowSliceNumber )
          os2 << "Slice: " << imCoor[2] << " / " << dims[2]-1 << std::endl;
        os2 << "Location: " << pos[2] << " mm";
        break;
          
        
      case NIREPvtkViewImage::CORONAL_ID :
        os << "Image size: " << dims[0] << " x " << dims[2] << "\n";
        os << "Voxel size: " << spacing[0] << " x " << spacing[2] << "\n";
        //os << imCoor[1] << " / " << dims[1]-1 << std::endl;
        os << "X: " << imCoor[0] << " px Z: " << imCoor[2] << " px Value: "
           << this->GetCurrentPointDoubleValue() << std::endl;
        os << "X: " << pos[0] << " mm Z: " << pos[2] << " mm\n";
        if ( this->ShowSliceNumber )
          os2 << "Slice: " << imCoor[1] << " / " << dims[1]-1 << std::endl;
        os2 << "Location: " << pos[1] << " mm";
        break;
        
        
      case NIREPvtkViewImage::SAGITTAL_ID :
        os << "Image size: " << dims[1] << " x " << dims[2] << "\n";
        os << "Voxel size: " << spacing[1] << " x " << spacing[2] << "\n";
        //os << imCoor[0] << " / " << dims[0]-1 << std::endl;
        os << "Y: " << imCoor[1] << " px Z: " << imCoor[2] << " px Value: "
           << this->GetCurrentPointDoubleValue() << std::endl;
        os << "Y: " << pos[1] << " mm Z: " << pos[2] << " mm\n";
        if ( this->ShowSliceNumber )
          os2 << "Slice: " << imCoor[0] << " / " << dims[0]-1 << std::endl;
        os2 << "Location: " << pos[0] << " mm";
        break;
  }
  os << "<window_level>";
  
  this->SetUpLeftAnnotation( os.str().c_str() );
  this->SetDownLeftAnnotation( os2.str().c_str() );
  //  }
  //  else
  //    this->SetUpRightAnnotation("");
  
  unsigned int direction = this->GetOrthogonalAxis (this->GetOrientation());
  this->DataSetCutPlane->SetOrigin (reslice[0], reslice[1], reslice[2]);
  
  switch(direction)
  {
      case X_ID :
        //this->DataSetCutPlane->SetNormal (1,0,0);
        this->DataSetCutBox->SetBounds (this->DataSetCutPlane->GetOrigin()[0],this->DataSetCutPlane->GetOrigin()[0]+this->BoxThickness,
                                        this->GetWholeMinPosition(1),this->GetWholeMaxPosition(1),
                                        this->GetWholeMinPosition(2),this->GetWholeMaxPosition(2));

        break;
      case Y_ID :
        //this->DataSetCutPlane->SetNormal (0,1,0);
        this->DataSetCutBox->SetBounds (this->GetWholeMinPosition(0),this->GetWholeMaxPosition(0),
                                        this->DataSetCutPlane->GetOrigin()[1],this->DataSetCutPlane->GetOrigin()[1]+this->BoxThickness,
                                        this->GetWholeMinPosition(2),this->GetWholeMaxPosition(2));
        break;
      case Z_ID :
        //this->DataSetCutPlane->SetNormal (0,0,1);
        this->DataSetCutBox->SetBounds (this->GetWholeMinPosition(0),this->GetWholeMaxPosition(0),
                                        this->GetWholeMinPosition(1),this->GetWholeMaxPosition(1),
                                        this->DataSetCutPlane->GetOrigin()[2],this->DataSetCutPlane->GetOrigin()[2]+this->BoxThickness);
        break;
  }


  if( this->DataSetList.size() )
  {

    this->ResetAndRestablishZoomAndCamera();

    /*
      We need to correct for the origin of the actor. Indeed, the ImageActor
      has always position 0 in Z in axial view, in X in sagittal view and
      in Y in coronal view. The projected dataset have an origin that depends
      on the required slice and can be negative. In that case, the projected
      data are behind the image actor and thus not visible. Here, we correct
      this by translating the actor so that it becomes visible.
     */
    for( unsigned int i=0; i<this->DataSetActorList.size(); i++)
    {
      double Pos[3];
      this->DataSetActorList[i]->GetPosition (Pos);

      switch(direction)
      {
          case X_ID :
            Pos[0] = -1.0*reslice[0] + 1.0;
            break;

          case Y_ID:
            Pos[1] = -1.0*reslice[1] + 1.0;
            break;

          case Z_ID:
            Pos[2] = -1.0*reslice[2] + 1.0;
            break;
      }

      this->DataSetActorList[i]->SetPosition (Pos);
    }

  }

  this->Modified();
}



void Checkerboard::SetWindow (double w)
{

  if( w<0.0 )
  {
    w = 0.0;
  }

  double shiftScaleWindow = this->GetShift() + w*this->GetScale();
  
  NIREPvtkViewImage::SetWindow ( shiftScaleWindow );
  this->WindowLevelForCorner->SetWindow( shiftScaleWindow );
  
  double v_min = this->GetLevel() - 0.5*this->GetWindow();
  double v_max = this->GetLevel() + 0.5*this->GetWindow();

  if( this->GetLookupTable() && this->WindowLevel->GetLookupTable())
  {
  
    this->GetLookupTable()->SetRange ( (v_min-0.5*this->GetShift())/this->GetScale(),
                                       (v_max-1.5*this->GetShift())/this->GetScale());
    this->WindowLevel->GetLookupTable()->SetRange (v_min, v_max);
    this->WindowLevelTwo->GetLookupTable()->SetRange (v_min, v_max);
  }

  if(this->BGWindowLevel && this->BGWindowLevel->GetLookupTable())
    this->BGWindowLevel->GetLookupTable()->SetRange( v_min, v_max);
}



void Checkerboard::SetLevel (double l)
{

  double shiftScaleLevel = this->GetShift() + l*this->GetScale();

  NIREPvtkViewImage::SetLevel ( shiftScaleLevel );
  this->WindowLevelForCorner->SetLevel( shiftScaleLevel );
    
  double v_min = this->GetLevel() - 0.5*this->GetWindow();
  double v_max = this->GetLevel() + 0.5*this->GetWindow();
  
  if( this->GetLookupTable() )
  {
    this->GetLookupTable()->SetRange ( (v_min-0.5*this->GetShift())/this->GetScale(),
                                       (v_max-1.5*this->GetShift())/this->GetScale());
    this->WindowLevel->GetLookupTable()->SetRange (v_min, v_max);
    this->WindowLevelTwo->GetLookupTable()->SetRange (v_min, v_max);
  }
}


//Changes:
//-Probably should get rid of this, but maybe not, will need to dicuss
//to see how we want to deal with overlaps.
void Checkerboard::SetSecondImage (vtkImageData* image)
{

  if( !image )
  {
    return;
  }
  
  if(this->SecondImage != image)
  {
    if( this->SecondImage  != NULL )
    {
      this->SecondImage->UnRegister (this);
    }
    this->SecondImage = image;
    this->SecondImage->Register (this);
    int type = image->GetScalarType();
    int numberOfScalars = image->GetNumberOfScalarComponents();
    if( image->GetScalarType() == VTK_UNSIGNED_CHAR  && (image->GetNumberOfScalarComponents()==3 || image->GetNumberOfScalarComponents()==4) )
    {
      this->AuxInputTwo = image;
    }
    else
    //if(!( image->GetScalarType() == VTK_UNSIGNED_CHAR  && (image->GetNumberOfScalarComponents()==3 || image->GetNumberOfScalarComponents()==4) ))
    {
      this->WindowLevelTwo->SetInput (image);
      double range[2];
      image->GetScalarRange (range);
      if ( this->WindowLevelTwo->GetLookupTable() )
      {
        this->WindowLevelTwo->GetLookupTable()->SetRange (range);
      }
      this->AuxInputTwo = this->WindowLevelTwo->GetOutput();
    }

    if( this->GetMaskImage() )
    {
      this->MaskFilterTwo->SetImageInput ( this->AuxInputTwo );
    }
    else
    {
      this->ImageResliceTwo->SetInput ( this->AuxInputTwo );
      this->ResliceInputTwo = this->AuxInputTwo;
    }

//    this->SetOrientation(this->Orientation);
      //this->ResliceInput = this->Blender->GetOutput();
    //}
  }

  if(this->GetImage())
  {
    if(this->GetSecondImage())
    {
      this->CheckerboardWidget->SetInteractor(this->GetRenderWindow()->GetInteractor());
      this->ImageCheckerboard->SetInput1(this->ImageReslice->GetOutput());
      this->ImageCheckerboard->SetInput2(this->ImageResliceTwo->GetOutput());
      this->ImageCheckerboard->Update();
      this->ImageActor->SetInput(this->ImageCheckerboard->GetOutput());
      this->AddActor(this->ImageActor);
      this->CheckerboardWidget->EnabledOn();

      this->AddActor(this->HorizontalLineActor);
      this->AddActor(this->VerticalLineActor);

  //this->AddActor(this->ImageActor);



  // Save the camera focal and position, and zoom, before calling InternalUpdate()
  double focal[3], pos[3], zoom;
  this->GetCameraFocalAndPosition (focal, pos);
  zoom = this->GetZoom();
  

  this->SetupAnnotations();
  this->InternalUpdate();

  
  // Check that the current displayed point lies within the bounds of the image. If not,
  // we camp it to the nearest acceptable position.
  double *wextent = image->GetBounds();
  double position[3];
  this->GetCurrentPoint ( position );
  position[0]<wextent[0]?position[0]=wextent[0]:position[0];
  position[0]>wextent[1]?position[0]=wextent[1]:position[0];
  position[1]<wextent[2]?position[1]=wextent[2]:position[1];
  position[1]>wextent[3]?position[1]=wextent[3]:position[1];
  position[2]<wextent[4]?position[2]=wextent[4]:position[2];
  position[2]>wextent[5]?position[2]=wextent[5]:position[2];
  this->SetCurrentPoint ( position );

  
    
  //this->SetWindow( this->GetWindow() );
  //this->SetLevel( this->GetLevel() );


  // restore the zoom and focal in case this is not the first time we render the image.
  if( !this->GetFirstImage() )
  {
    this->SetZoom ( zoom );
    this->SetCameraFocalAndPosition (focal, pos);
    this->SetFirstImage (0);
  }

  if( this->RulerWidgetVisibility )
    this->RulerWidget->On();
    }
  }
    
}



//Changes:
//-Either need to create another SetImage, or have this SetImage place the images into an array
//-Look into RegisterImage, I might have to do something else.
//-I think I should create another SetImage
void Checkerboard::SetImage(vtkImageData* image)
{
  if(!image)
  {
    return;
  }

  int* extent = image->GetExtent();
  if( extent[1]<extent[0] || extent[3]<extent[2] || extent[5]<extent[4] )
  {
    vtkErrorMacro ( << "Image extent is not valid: " << extent[0] << " "
                    << extent[1] << " "
                    << extent[2] << " "
                    << extent[3] << " "
                    << extent[4] << " "
                    << extent[5]);
    return;
  }
  

  NIREPvtkViewImage::SetImage( image );

  // check if there is a mask image. If yes, then we check
  // if the new image size and spacing agrees with the mask image.
  // If not, we remove the mask image
  if( this->GetMaskImage() )
  {
    int*    dims        = image->GetDimensions();
    double* spacing     = image->GetSpacing();
    int*    maskDims    = this->GetMaskImage()->GetDimensions();
    double* maskSpacing = this->GetMaskImage()->GetSpacing();

    if( dims[0]!=maskDims[0] || dims[1]!=maskDims[1] || dims[2]!=maskDims[2] ||
        spacing[0]!=maskSpacing[0] || spacing[1]!=maskSpacing[1] || spacing[2]!=maskSpacing[2] )
    {
      this->RemoveMaskImage();
    }
  }

  // should check also the overlapping image

  if( image->GetScalarType() == VTK_UNSIGNED_CHAR  && (image->GetNumberOfScalarComponents()==3 || image->GetNumberOfScalarComponents()==4) )
  {
    this->AuxInput = image;
  }
  else
  {
    this->AuxInput = this->WindowLevel->GetOutput();

    this->WindowLevel->SetInput (image);
    double range[2];
    image->GetScalarRange (range);
    if ( this->WindowLevel->GetLookupTable() )
    {
      this->WindowLevel->GetLookupTable()->SetRange (range);
    }
  }


  if( this->GetOverlappingImage() )
  {
    this->Blender->SetInput (0, this->AuxInput );
  }
  else
  {
    if( this->GetMaskImage() )
    {
      this->MaskFilter->SetImageInput ( this->AuxInput );
    }
    else
    {
      this->ImageReslice->SetInput ( this->AuxInput );
      this->ResliceInput = this->AuxInput;
    }
  }

  //this->ImageActor->SetInput( this->ImageReslice->GetOutput() );

  if(this->GetImage())
  {
    if(this->GetSecondImage())
    {
      this->CheckerboardWidget->SetInteractor(this->GetRenderWindow()->GetInteractor());
      this->ImageCheckerboard->SetInput1(this->ImageReslice->GetOutput());
      this->ImageCheckerboard->SetInput2(this->ImageResliceTwo->GetOutput());
      this->ImageCheckerboard->Update();
      this->ImageActor->SetInput(this->ImageCheckerboard->GetOutput());
      this->AddActor(this->ImageActor);
      this->CheckerboardWidget->EnabledOn();



      this->AddActor(this->HorizontalLineActor);
      this->AddActor(this->VerticalLineActor);

      //this->AddActor(this->ImageActor);



      // Save the camera focal and position, and zoom, before calling InternalUpdate()
      double focal[3], pos[3], zoom;
      this->GetCameraFocalAndPosition (focal, pos);
      zoom = this->GetZoom();
      

      this->SetupAnnotations();
      this->InternalUpdate();

      
      // Check that the current displayed point lies within the bounds of the image. If not,
      // we camp it to the nearest acceptable position.
      double *wextent = image->GetBounds();
      double position[3];
      this->GetCurrentPoint ( position );
      position[0]<wextent[0]?position[0]=wextent[0]:position[0];
      position[0]>wextent[1]?position[0]=wextent[1]:position[0];
      position[1]<wextent[2]?position[1]=wextent[2]:position[1];
      position[1]>wextent[3]?position[1]=wextent[3]:position[1];
      position[2]<wextent[4]?position[2]=wextent[4]:position[2];
      position[2]>wextent[5]?position[2]=wextent[5]:position[2];
      this->SetCurrentPoint ( position );


      // restore the zoom and focal in case this is not the first time we render the image.
      if( !this->GetFirstImage() )
      {
        this->SetZoom ( zoom );
        this->SetCameraFocalAndPosition (focal, pos);
        this->SetFirstImage (0);
      }

      if( this->RulerWidgetVisibility )
        this->RulerWidget->On();

      }
  }
}

void Checkerboard::SetLookupTable (vtkScalarsToColors* lut)
{
    
  if( !lut )
  {
    return;
  }
    
  NIREPvtkViewImage::SetLookupTable (lut);

  double v_min = this->GetLevel() - 0.5*this->GetWindow();
  double v_max = this->GetLevel() + 0.5*this->GetWindow();

  lut->SetRange ( (v_min-0.5*this->GetShift())/this->GetScale(),
                  (v_max-1.5*this->GetShift())/this->GetScale() );

  
  vtkLookupTable* realLut = vtkLookupTable::SafeDownCast (lut);

  if( !realLut )
  {
    std::cerr << "Error: Cannot cast vtkScalarsToColors to vtkLookupTable." << std::endl;
    return;
  }
  
  vtkLookupTable* newLut = vtkLookupTable::New();
  newLut->DeepCopy (realLut);
  newLut->SetRange (v_min, v_max);
  this->WindowLevel->SetLookupTable (newLut);
  newLut->Delete();

  vtkLookupTable* newLutTwo = vtkLookupTable::New();
  newLutTwo->DeepCopy (realLut);
  newLutTwo->SetRange (v_min, v_max);
  this->WindowLevelTwo->SetLookupTable (newLutTwo);
  newLutTwo->Delete();
  
}


void Checkerboard::SetOrientation(unsigned int p_orientation)
{
  if( (p_orientation > vtkViewImage::NB_PLAN_IDS - 1) || (this->Orientation == p_orientation) )
  {
    return;
  }

  this->Orientation = p_orientation;

  
  // setup the OrientationMatrix and the ScreenToRealWorldMatrix. Then, we have no
  // need to check the view's orientation to determine what slice to display: a
  // simple matrix multiplication will tell it for us.
  this->OrientationMatrix->Zero();
  this->ScreenToRealWorldMatrix->Zero();

  
  if( this->Orientation == vtkViewImage::SAGITTAL_ID )
  {
    this->ImageReslice->SetResliceAxesDirectionCosines( 0, -1, 0,
                                                        0, 0, 1,
                                                        1, 0, 0);
          this->ImageResliceTwo->SetResliceAxesDirectionCosines( 0, -1, 0,
                                                        0, 0, 1,
                                                        1, 0, 0);
    this->OrientationMatrix->SetElement (0, 2, 0.0);
    this->OrientationMatrix->SetElement (1, 0, -1.0);
    this->OrientationMatrix->SetElement (2, 1, 1.0);

    this->ScreenToRealWorldMatrix->SetElement (0, 0, 1.0);
  }

  
  if( this->Orientation == vtkViewImage::CORONAL_ID )
  {
    if( this->Conventions == RADIOLOGIC )
    {
      this->OrientationMatrix->SetElement(0, 0, 1.0);
      this->ImageReslice->SetResliceAxesDirectionCosines(1,  0, 0,
                                                         0,  0, 1,
                                                         0,  1, 0); 
          this->ImageResliceTwo->SetResliceAxesDirectionCosines(1,  0, 0,
                                                         0,  0, 1,
                                                         0,  1, 0); 
    }
    else
    {  
      this->OrientationMatrix->SetElement(0, 0, -1.0);
      this->ImageReslice->SetResliceAxesDirectionCosines(-1,  0, 0,
                                                         0,  0, 1,
                                                         0,  1, 0); 
          this->ImageResliceTwo->SetResliceAxesDirectionCosines(-1,  0, 0,
                                                         0,  0, 1,
                                                         0,  1, 0); 
    }
    
    this->OrientationMatrix->SetElement(2, 1, 1.0);
    this->ScreenToRealWorldMatrix->SetElement (1, 1, 1.0);
  }

  
  if( this->Orientation == vtkViewImage::AXIAL_ID )
  {

    
    if( this->Conventions == RADIOLOGIC )
    {
      this->OrientationMatrix->SetElement(0, 0, 1.0 );
      this->ImageReslice->SetResliceAxesDirectionCosines(1, 0, 0,
                                                         0, 1, 0,
                                                         0, 0, 1);
            this->ImageResliceTwo->SetResliceAxesDirectionCosines(1, 0, 0,
                                                         0, 1, 0,
                                                         0, 0, 1);
    }
    else
    {  
      this->OrientationMatrix->SetElement(0, 0, -1.0 );
      this->ImageReslice->SetResliceAxesDirectionCosines(-1, 0, 0,
                                                         0, 1, 0,
                                                         0, 0, 1);
            this->ImageResliceTwo->SetResliceAxesDirectionCosines(-1, 0, 0,
                                                         0, 1, 0,
                                                         0, 0, 1);
    }

    this->OrientationMatrix->SetElement(1, 1, 1.0 );
    this->ScreenToRealWorldMatrix->SetElement (2, 2, 1.0);
  }

  unsigned int direction = this->GetOrthogonalAxis (this->GetOrientation());
  switch(direction)
  {
      case X_ID :
        this->DataSetCutPlane->SetNormal (1,0,0);
        break;
      case Y_ID :
        this->DataSetCutPlane->SetNormal (0,1,0);
        break;
      case Z_ID :
        this->DataSetCutPlane->SetNormal (0,0,1);
        break;
  }

  //this->ImageReslice->Modified();

  this->UpdateImageActor(); // make sure update extent are up to date
  this->UpdatePosition(); // make sure reslicer origin are ok
  this->InitializeImagePositionAndSize(); // reset and center the view
  this->SetupAnnotations(); // make sure annotations are ok
  
  this->Modified();
  
}



vtkActor* Checkerboard::AddDataSet (vtkDataSet* dataset,  vtkProperty* property)
{

  bool doit = true;

  if (!dataset)
    doit = false;
  
  if( this->HasDataSet (dataset) )
  {
    doit = false;
  }
  vtkImageData* imagedata = NULL;
  imagedata = vtkImageData::SafeDownCast(dataset);
  
  if (imagedata)
  {
    this->SetImage(imagedata);
  }
  else
  {
    
    if ( !this->GetImage() )
    {
      doit = false;
    }
    // don't constrain the memory of input datasets anymore.
    if (doit)
    {
      
      vtkMatrix4x4* matrix = vtkMatrix4x4::New();
      for (unsigned int i=0; i<3; i++)
      {
        for (unsigned int j=0; j<3; j++)
        {
          matrix->SetElement(i,j,this->ImageReslice->GetResliceAxes()->GetElement(j,i));
        }
        matrix->SetElement(i,3,0);
      }
      matrix->SetElement(3,3,1);
      
      vtkCutter* cutter = vtkCutter::New();
      cutter->SetCutFunction (this->DataSetCutPlane);

      // Very strangely in some cases (ex : landmarks)
      // the cutter increments the RefCount of the input dataset by 2
      // making some memory leek...
      // I could not manage to know what is wrong here
      
      cutter->SetInput (dataset);
      cutter->Update();
      
      if (!cutter->GetOutput())
      {
        vtkWarningMacro(<< "Unable to cut this dataset...");
        matrix->Delete();
        cutter->Delete();
        return NULL;
      }
      
      
      vtkPolyDataMapper* mapper = vtkPolyDataMapper::New();
      mapper->SetInput (cutter->GetOutput());
      
      vtkActor* actor = vtkActor::New();
      actor->SetUserMatrix (matrix);
      actor->SetMapper (mapper);
      if (property)
      {
        actor->SetProperty (property);
      }

      actor->PickableOff();
      
      this->AddActor (actor);
      this->DataSetList.push_back (dataset);
      this->DataSetActorList.push_back (actor);

      this->ResetAndRestablishZoomAndCamera();

      actor->Delete();
      mapper->Delete();
      matrix->Delete();
      cutter->Delete();
    }
  }

  
  return this->GetDataSetActor(dataset);
  
}


vtkActor* Checkerboard::SyncAddPolyData (vtkPolyData* polydata,  vtkProperty* property, double thickness)
{

  if( this->IsLocked() )
  {
    return NULL;
  }
  

  vtkActor* actor = this->AddPolyData (polydata, property, thickness);
  
  this->Lock();
  for( unsigned int i=0; i<this->Children.size(); i++)
  {
//     Checkerboard* view = dynamic_cast<Checkerboard*> (this->Children[i]);
    Checkerboard* view = Checkerboard::SafeDownCast (this->Children[i]);
    if( view )
    {
      view->SyncAddPolyData (polydata, property, thickness);
    }
  }
  this->UnLock();

  return actor;
  
  
}