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

  Program:   Visualization Toolkit
  Module:    $RCSfile: vtkBlankStructuredGrid.h,v $

  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 vtkBlankStructuredGrid - translate point attribute data into a blanking field

// .SECTION Description
// vtkBlankStructuredGrid is a filter that sets the blanking field in a 
// vtkStructuredGrid dataset. The blanking field is set by examining a
// specified point attribute data array (e.g., scalars) and converting
// values in the data array to either a "1" (visible) or "0" (blanked) value
// in the blanking array. The values to be blanked are specified by giving
// a min/max range. All data values in the data array indicated and laying
// within the range specified (inclusive on both ends) are translated to 
// a "off" blanking value.

// .SECTION See Also
// vtkStructuredGrid

#ifndef __vtkBlankStructuredGrid_h
#define __vtkBlankStructuredGrid_h

#include "vtkStructuredGridAlgorithm.h"

class VTK_GRAPHICS_EXPORT vtkBlankStructuredGrid : public vtkStructuredGridAlgorithm
{
public:
  static vtkBlankStructuredGrid *New();
  vtkTypeRevisionMacro(vtkBlankStructuredGrid,vtkStructuredGridAlgorithm);
  void PrintSelf(ostream& os, vtkIndent indent);

  // Description:
  // Specify the lower data value in the data array specified which will be
  // converted into a "blank" (or off) value in the blanking array.
  vtkSetMacro(MinBlankingValue,double);
  vtkGetMacro(MinBlankingValue,double);

  // Description:
  // Specify the upper data value in the data array specified which will be
  // converted into a "blank" (or off) value in the blanking array.
  vtkSetMacro(MaxBlankingValue,double);
  vtkGetMacro(MaxBlankingValue,double);

  // Description:
  // Specify the data array name to use to generate the blanking
  // field. Alternatively, you can specify the array id. (If both are set,
  // the array name takes precedence.)
  vtkSetStringMacro(ArrayName);
  vtkGetStringMacro(ArrayName);

  // Description:
  // Specify the data array id to use to generate the blanking
  // field. Alternatively, you can specify the array name. (If both are set,
  // the array name takes precedence.)
  vtkSetMacro(ArrayId,int);
  vtkGetMacro(ArrayId,int);

  // Description:
  // Specify the component in the data array to use to generate the blanking
  // field.
  vtkSetClampMacro(Component,int,0,VTK_LARGE_INTEGER);
  vtkGetMacro(Component,int);

protected:
  vtkBlankStructuredGrid();
  ~vtkBlankStructuredGrid();

  virtual int RequestData(vtkInformation *, vtkInformationVector **, vtkInformationVector *);
  
  double MinBlankingValue;
  double MaxBlankingValue;
  char  *ArrayName;
  int   ArrayId;
  int   Component;
  
private:
  vtkBlankStructuredGrid(const vtkBlankStructuredGrid&);  // Not implemented.
  void operator=(const vtkBlankStructuredGrid&);  // Not implemented.
};

#endif