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

  Program:   Visualization Toolkit
  Module:    vtkResliceCursor.h

  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm 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 notice for more information.

=========================================================================*/
// .NAME vtkResliceCursor - Geometry for a reslice cursor
// .SECTION Description
// This class represents a reslice cursor. It consists of two cross
// sectional hairs, with an optional thickness. The crosshairs
// hairs may have a hole in the center. These may be translated or rotated
// independent of each other in the view. The result is used to reslice
// the data along these cross sections. This allows the user to perform
// multi-planar thin or thick reformat of the data on an image view, rather
// than a 3D view.
// .SECTION See Also
// vtkResliceCursorWidget vtkResliceCursor vtkResliceCursorPolyDataAlgorithm
// vtkResliceCursorRepresentation vtkResliceCursorThickLineRepresentation
// vtkResliceCursorActor vtkImagePlaneWidget

#ifndef __vtkResliceCursor_h
#define __vtkResliceCursor_h

#include "vtkObject.h"

class vtkImageData;
class vtkPolyData;
class vtkPlane;
class vtkPlaneCollection;

class VTK_GRAPHICS_EXPORT vtkResliceCursor : public vtkObject
{
public:
  vtkTypeMacro(vtkResliceCursor,vtkObject);

  // Description:
  static vtkResliceCursor *New();

  // Description:
  // Set the image (3D) that we are slicing
  virtual void SetImage(vtkImageData * );
  vtkGetObjectMacro( Image, vtkImageData );

  // Description:
  // Set/Get the cente of the reslice cursor.
  virtual void SetCenter( double, double, double );
  virtual void SetCenter( double center[3] );
  vtkGetVector3Macro( Center, double );

  // Description:
  // Set/Get the thickness of the cursor
  vtkSetVector3Macro( Thickness, double );
  vtkGetVector3Macro( Thickness, double );

  // Description:
  // Enable disable thick mode. Default is to enable it.
  vtkSetMacro( ThickMode, int );
  vtkGetMacro( ThickMode, int );
  vtkBooleanMacro( ThickMode, int );

  // Description:
  // Get the 3D PolyData representation
  virtual vtkPolyData * GetPolyData();

  // Description:
  // Get the slab and centerline polydata along an axis
  virtual vtkPolyData * GetCenterlineAxisPolyData( int axis );

  // Description:
  // Printself method.
  virtual void PrintSelf(ostream& os, vtkIndent indent);

  // Description:
  // Get the planes that represent normals along the X, Y and Z. The argument
  // passed to this method must be an integer in the range 0-2 (corresponding
  // to the X, Y and Z axes.
  virtual vtkPlane * GetPlane( int n );

  // Description:
  // Build the polydata
  virtual void Update();

  // Description:
  // Get the computed axes directions
  vtkGetVector3Macro( XAxis, double );
  vtkGetVector3Macro( YAxis, double );
  vtkGetVector3Macro( ZAxis, double );
  vtkSetVector3Macro( XAxis, double );
  vtkSetVector3Macro( YAxis, double );
  vtkSetVector3Macro( ZAxis, double );
  virtual double * GetAxis( int i );

  // Description:
  // Show a hole in the center of the cursor, so its easy to see the pixels
  // within the hole. ON by default
  vtkSetMacro( Hole, int );
  vtkGetMacro( Hole, int );

  // Description:
  // Set the width of the hole in mm
  vtkSetMacro( HoleWidth, double );
  vtkGetMacro( HoleWidth, double );

  // Description:
  // Set the width of the hole in pixels. If set, this will override the
  // hole with in mm.
  vtkSetMacro( HoleWidthInPixels, double );
  vtkGetMacro( HoleWidthInPixels, double );

  // Description:
  // Get the MTime. Check the MTime of the internal planes as well.
  virtual unsigned long int GetMTime();

  // Description:
  // Reset the cursor to the default position, ie with the axes, normal
  // to each other and axis aligned and with the cursor pointed at the
  // center of the image.
  virtual void Reset();

protected:
  vtkResliceCursor();
  ~vtkResliceCursor();

  virtual void BuildCursorGeometry();
  virtual void BuildPolyData();
  virtual void BuildCursorTopology();
  virtual void BuildCursorTopologyWithHole();
  virtual void BuildCursorTopologyWithoutHole();
  virtual void BuildCursorGeometryWithoutHole();
  virtual void BuildCursorGeometryWithHole();
  virtual void ComputeAxes();

  int           ThickMode;
  int           Hole;
  double        HoleWidth;
  double        HoleWidthInPixels;
  double        Thickness[3];
  double        Center[3];
  double        XAxis[3];
  double        YAxis[3];
  double        ZAxis[3];
  vtkImageData *Image;
  vtkPolyData  *PolyData;

  vtkPolyData  *CenterlineAxis[3];

  vtkPlaneCollection * ReslicePlanes;
  vtkTimeStamp  PolyDataBuildTime;

private:
  vtkResliceCursor(const vtkResliceCursor&);  // Not implemented.
  void operator=(const vtkResliceCursor&);  // Not implemented.
};

#endif