/*========================================================================= Program: Visualization Toolkit Module: vtkExtractRectilinearGrid.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 vtkExtractRectilinearGrid * @brief Extract a sub grid (VOI) from the structured rectilinear dataset. * * vtkExtractRectilinearGrid rounds out the set of filters that extract * a subgrid out of a larger structured data set. RIght now, this filter * only supports extracting a VOI. In the future, it might support * strides like the vtkExtract grid filter. * * @sa * vtkExtractGrid vtkImageClip vtkGeometryFilter vtkExtractGeometry vtkExtractVOI * vtkStructuredGridGeometryFilter */ #ifndef vtkExtractRectilinearGrid_h #define vtkExtractRectilinearGrid_h #include "vtkFiltersExtractionModule.h" // For export macro #include "vtkRectilinearGridAlgorithm.h" // Forward Declarations class vtkExtractStructuredGridHelper; class VTKFILTERSEXTRACTION_EXPORT vtkExtractRectilinearGrid : public vtkRectilinearGridAlgorithm { public: static vtkExtractRectilinearGrid* New(); vtkTypeMacro(vtkExtractRectilinearGrid, vtkRectilinearGridAlgorithm); void PrintSelf(ostream& os, vtkIndent indent) override; //@{ /** * Specify i-j-k (min,max) pairs to extract. The resulting structured grid * dataset can be of any topological dimension (i.e., point, line, plane, * or 3D grid). */ vtkSetVector6Macro(VOI, int); vtkGetVectorMacro(VOI, int, 6); //@} //@{ /** * Set the sampling rate in the i, j, and k directions. If the rate is > 1, * then the resulting VOI will be subsampled representation of the input. * For example, if the SampleRate=(2,2,2), every other point will be * selected, resulting in a volume 1/8th the original size. * Initial value is (1,1,1). */ vtkSetVector3Macro(SampleRate, int); vtkGetVectorMacro(SampleRate, int, 3); //@} //@{ /** * Control whether to enforce that the "boundary" of the grid is output in * the subsampling process. (This ivar only has effect when the SampleRate * in any direction is not equal to 1.) When this ivar IncludeBoundary is * on, the subsampling will always include the boundary of the grid even * though the sample rate is not an even multiple of the grid * dimensions. (By default IncludeBoundary is off.) */ vtkSetMacro(IncludeBoundary, vtkTypeBool); vtkGetMacro(IncludeBoundary, vtkTypeBool); vtkBooleanMacro(IncludeBoundary, vtkTypeBool); //@} protected: vtkExtractRectilinearGrid(); ~vtkExtractRectilinearGrid() override; int RequestData(vtkInformation*, vtkInformationVector**, vtkInformationVector*) override; int RequestInformation(vtkInformation*, vtkInformationVector**, vtkInformationVector*) override; int RequestUpdateExtent(vtkInformation*, vtkInformationVector**, vtkInformationVector*) override; /** * Implementation for RequestData using a specified VOI. This is because the * parallel filter needs to muck around with the VOI to get spacing and * partitioning to play nice. The VOI is calculated from the output * data object's extents in this implementation. */ bool RequestDataImpl(vtkInformationVector** inputVector, vtkInformationVector* outputVector); int VOI[6]; int SampleRate[3]; vtkTypeBool IncludeBoundary; vtkExtractStructuredGridHelper* Internal; private: vtkExtractRectilinearGrid(const vtkExtractRectilinearGrid&) = delete; void operator=(const vtkExtractRectilinearGrid&) = delete; }; #endif