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

  Program:   Visualization Toolkit
  Module:    vtkVolumeReader.h
  Language:  C++
  Date:      $Date$
  Version:   $Revision$


Copyright (c) 1993-2000 Ken Martin, Will Schroeder, Bill Lorensen 
All rights reserved.

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modification, are permitted provided that the following conditions are met:

 * Redistributions of source code must retain the above copyright notice,
   this list of conditions and the following disclaimer.

 * Redistributions in binary form must reproduce the above copyright notice,
   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.

 * Neither name of Ken Martin, Will Schroeder, or Bill Lorensen nor the names
   of any contributors may be used to endorse or promote products derived
   from this software without specific prior written permission.

 * Modified source versions must be plainly marked as such, and must not be
   misrepresented as being the original software.

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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR
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=========================================================================*/
// .NAME vtkVolumeReader - read image files
// .SECTION Description
// vtkVolumeReader is a source object that reads image files.
//
// VolumeReader creates structured point datasets. The dimension of the 
// dataset depends upon the number of files read. Reading a single file 
// results in a 2D image, while reading more than one file results in a 
// 3D volume.
//
// File names are created using FilePattern and FilePrefix as follows:
// sprintf (filename, FilePattern, FilePrefix, number);
// where number is in the range ImageRange[0] to ImageRange[1]. If
// ImageRange[1] <= ImageRange[0], then slice number ImageRange[0] is
// read. Thus to read an image set ImageRange[0] = ImageRange[1] = slice 
// number. The default behavior is to read a single file (i.e., image slice 1).
//
// The DataMask instance variable is used to read data files with imbedded
// connectivity or segmentation information. For example, some data has
// the high order bit set to indicate connected surface. The DataMask allows
// you to select this data. Other important ivars include HeaderSize, which
// allows you to skip over initial info, and SwapBytes, which turns on/off
// byte swapping. Consider using vtkImageReader as a replacement.

// .SECTION See Also
// vtkSliceCubes vtkMarchingCubes vtkPNMReader vtkVolume16Reader
// vtkImageReader

#ifndef __vtkVolumeReader_h
#define __vtkVolumeReader_h

#include <stdio.h>
#include "vtkStructuredPointsSource.h"

class VTK_EXPORT vtkVolumeReader : public vtkStructuredPointsSource
{
public:
  vtkTypeMacro(vtkVolumeReader,vtkStructuredPointsSource);
  void PrintSelf(ostream& os, vtkIndent indent);

  // Description:
  // Specify file prefix for the image file(s).
  vtkSetStringMacro(FilePrefix);
  vtkGetStringMacro(FilePrefix);

  // Description:
  // The sprintf format used to build filename from FilePrefix and number.
  vtkSetStringMacro(FilePattern);
  vtkGetStringMacro(FilePattern);

  // Description:
  // Set the range of files to read.
  vtkSetVector2Macro(ImageRange,int);
  vtkGetVectorMacro(ImageRange,int,2);

  // Description:
  // Specify the spacing for the data.
  vtkSetVector3Macro(DataSpacing,float);
  vtkGetVectorMacro(DataSpacing,float,3);

  // Description:
  // Specify the origin for the data.
  vtkSetVector3Macro(DataOrigin,float);
  vtkGetVectorMacro(DataOrigin,float,3);

  // Description:
  // Other objects make use of this method.
  virtual vtkStructuredPoints *GetImage(int ImageNumber) = 0;

protected:
  vtkVolumeReader();
  ~vtkVolumeReader();
  vtkVolumeReader(const vtkVolumeReader&) {};
  void operator=(const vtkVolumeReader&) {};

  char *FilePrefix;
  char *FilePattern;
  int ImageRange[2];
  float DataSpacing[3];
  float DataOrigin[3];
};

#endif


