text: /*=========================================================================
  
    Program:   Visualization Toolkit
    Module:    vtkStructuredGridGeometryFilter.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.
  
  =========================================================================*/
  /**
   * @class   vtkStructuredGridGeometryFilter
   * @brief   extract geometry for structured grid
   *
   * vtkStructuredGridGeometryFilter is a filter that extracts geometry from a
   * structured grid. By specifying appropriate i-j-k indices, it is possible
   * to extract a point, a curve, a surface, or a "volume". Depending upon the
   * type of data, the curve and surface may be curved or planar. (The volume
   * is actually a (n x m x o) region of points.)
   *
   * The extent specification is zero-offset. That is, the first k-plane in
   * a 50x50x50 structured grid is given by (0,49, 0,49, 0,0).
   *
   * The output of this filter is affected by the structured grid blanking.
   * If blanking is on, and a blanking array defined, then those cells
   * attached to blanked points are not output. (Blanking is a property of
   * the input vtkStructuredGrid.)
   *
   * @warning
   * If you don't know the dimensions of the input dataset, you can use a large
   * number to specify extent (the number will be clamped appropriately). For
   * example, if the dataset dimensions are 50x50x50, and you want a the fifth
   * k-plane, you can use the extents (0,100, 0,100, 4,4). The 100 will
   * automatically be clamped to 49.
   *
   * @sa
   * vtkGeometryFilter vtkExtractGrid vtkStructuredGrid
  */
  
  #ifndef vtkStructuredGridGeometryFilter_h
  #define vtkStructuredGridGeometryFilter_h
  
  #include "vtkFiltersGeometryModule.h" // For export macro
  #include "vtkPolyDataAlgorithm.h"
  
  class VTKFILTERSGEOMETRY_EXPORT vtkStructuredGridGeometryFilter : public vtkPolyDataAlgorithm
  {
  public:
    static vtkStructuredGridGeometryFilter *New();
    vtkTypeMacro(vtkStructuredGridGeometryFilter,vtkPolyDataAlgorithm);
    void PrintSelf(ostream& os, vtkIndent indent) VTK_OVERRIDE;
  
    //@{
    /**
     * Get the extent in topological coordinate range (imin,imax, jmin,jmax,
     * kmin,kmax).
     */
    vtkGetVectorMacro(Extent,int,6);
    //@}
  
    /**
     * Specify (imin,imax, jmin,jmax, kmin,kmax) indices.
     */
    void SetExtent(int iMin, int iMax, int jMin, int jMax, int kMin, int kMax);
  
    /**
     * Specify (imin,imax, jmin,jmax, kmin,kmax) indices in array form.
     */
    void SetExtent(int extent[6]);
  
  protected:
    vtkStructuredGridGeometryFilter();
    ~vtkStructuredGridGeometryFilter() VTK_OVERRIDE {}
  
    int RequestData(vtkInformation *, vtkInformationVector **, vtkInformationVector *) VTK_OVERRIDE;
    int RequestUpdateExtent(vtkInformation *, vtkInformationVector **, vtkInformationVector *) VTK_OVERRIDE;
    int FillInputPortInformation(int port, vtkInformation *info) VTK_OVERRIDE;
  
    int Extent[6];
  private:
    vtkStructuredGridGeometryFilter(const vtkStructuredGridGeometryFilter&) VTK_DELETE_FUNCTION;
    void operator=(const vtkStructuredGridGeometryFilter&) VTK_DELETE_FUNCTION;
  };
  
  #endif
  
  
  