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82 lines
3.2 KiB
82 lines
3.2 KiB
/*=========================================================================
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Program: Visualization Toolkit
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Module: $RCSfile: vtkStructuredGridGeometryFilter.h,v $
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Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
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All rights reserved.
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See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notice for more information.
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=========================================================================*/
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// .NAME vtkStructuredGridGeometryFilter - extract geometry for structured grid
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// .SECTION Description
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// vtkStructuredGridGeometryFilter is a filter that extracts geometry from a
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// structured grid. By specifying appropriate i-j-k indices, it is possible
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// to extract a point, a curve, a surface, or a "volume". Depending upon the
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// type of data, the curve and surface may be curved or planar. (The volume
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// is actually a (n x m x o) region of points.)
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//
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// The extent specification is zero-offset. That is, the first k-plane in
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// a 50x50x50 structured grid is given by (0,49, 0,49, 0,0).
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//
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// The output of this filter is affected by the structured grid blanking.
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// If blanking is on, and a blanking array defined, then those cells
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// attached to blanked points are not output. (Blanking is a property of
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// the input vtkStructuredGrid.)
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// .SECTION Caveats
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// If you don't know the dimensions of the input dataset, you can use a large
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// number to specify extent (the number will be clamped appropriately). For
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// example, if the dataset dimensions are 50x50x50, and you want a the fifth
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// k-plane, you can use the extents (0,100, 0,100, 4,4). The 100 will
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// automatically be clamped to 49.
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// .SECTION See Also
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// vtkGeometryFilter vtkExtractGrid vtkStructuredGrid
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#ifndef __vtkStructuredGridGeometryFilter_h
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#define __vtkStructuredGridGeometryFilter_h
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#include "vtkPolyDataAlgorithm.h"
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class VTK_GRAPHICS_EXPORT vtkStructuredGridGeometryFilter : public vtkPolyDataAlgorithm
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{
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public:
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static vtkStructuredGridGeometryFilter *New();
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vtkTypeRevisionMacro(vtkStructuredGridGeometryFilter,vtkPolyDataAlgorithm);
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void PrintSelf(ostream& os, vtkIndent indent);
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// Description:
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// Get the extent in topological coordinate range (imin,imax, jmin,jmax,
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// kmin,kmax).
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vtkGetVectorMacro(Extent,int,6);
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// Description:
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// Specify (imin,imax, jmin,jmax, kmin,kmax) indices.
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void SetExtent(int iMin, int iMax, int jMin, int jMax, int kMin, int kMax);
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// Description:
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// Specify (imin,imax, jmin,jmax, kmin,kmax) indices in array form.
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void SetExtent(int extent[6]);
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protected:
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vtkStructuredGridGeometryFilter();
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~vtkStructuredGridGeometryFilter() {}
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virtual int RequestData(vtkInformation *, vtkInformationVector **, vtkInformationVector *);
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virtual int RequestUpdateExtent(vtkInformation *, vtkInformationVector **, vtkInformationVector *);
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virtual int FillInputPortInformation(int port, vtkInformation *info);
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int Extent[6];
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private:
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vtkStructuredGridGeometryFilter(const vtkStructuredGridGeometryFilter&); // Not implemented.
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void operator=(const vtkStructuredGridGeometryFilter&); // Not implemented.
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};
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#endif
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