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

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

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

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

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 * 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.

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=========================================================================*/
// .NAME vtkStructuredPoints - A subclass of ImageData.
// .SECTION Description
// StructuredPoints is a subclass of ImageData that requires the data extent
// to exactly match the update extent. Normall image data allows that the
// data extent may be larger than the update extent.
// StructuredPoints also defines the origin differently that vtkImageData.
// For structured points the origin is the location of first point. 
// Whereas images define the origin as the location of point 0, 0, 0.
// Image Origin is stored in ivar, and structured points
// have special methods for setting/getting the origin/extents.


#ifndef __vtkStructuredPoints_h
#define __vtkStructuredPoints_h

#include "vtkImageData.h"

  
class VTK_EXPORT vtkStructuredPoints : public vtkImageData
{
public:
  static vtkStructuredPoints *New();
  vtkTypeMacro(vtkStructuredPoints,vtkImageData);
  
  // Description:
  // Create a similar type object
  vtkDataObject *MakeObject() {return vtkStructuredPoints::New();}

  // Description:
  // To simplify filter superclasses,
  int GetDataObjectType() {return VTK_STRUCTURED_POINTS;}

  // Description:
  // The update extent is set to the whole extent, since this is required by
  // vtkStructuredPoints data object.
  virtual void ModifyExtentForUpdateExtent();

  // Description:
  // Internal method in a class we hope to remove
  virtual void PropagateUpdateExtent();

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

#endif



