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92 lines
3.1 KiB
C++
92 lines
3.1 KiB
C++
/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkSMPMergePolyDataHelper.h
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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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/**
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* @class vtkSMPMergePolyDataHelper
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* @brief Utility class for merging poly data in parallel
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* This class is designed as a utility class to help merging of poly data
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* generated by filters that generate multiple polydata outputs and the associated
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* locators. It requires that the filter uses vtkSMPMergePoints which creates
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* a number of necessary data structures.
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*/
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#ifndef vtkSMPMergePolyDataHelper_h
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#define vtkSMPMergePolyDataHelper_h
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#include "vtkConfigure.h"
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#include "vtkFiltersSMPModule.h"
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#include <vector>
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class vtkPolyData;
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class vtkSMPMergePoints;
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class vtkIdList;
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class VTKFILTERSSMP_EXPORT vtkSMPMergePolyDataHelper
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{
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public:
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//@{
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/**
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* This is the data structure needed by the MergePolyData function.
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* Each input is represented by a polydata (Input), a locator generated
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* using identical binning structure (Locator) and offset structures
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* for each vtkCellArray type. These offsets allow semi-random access
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* to the cell arrays. They should store offsets to where cells start
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* in the cell arrays. Each offset can be for 1 or more cells. The finer
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* the granularity, the better the parallelism.
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*/
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struct InputData
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{
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vtkPolyData* Input;
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vtkSMPMergePoints* Locator;
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vtkIdList* VertOffsets;
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vtkIdList* LineOffsets;
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vtkIdList* PolyOffsets;
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//@}
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InputData(vtkPolyData* input,
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vtkSMPMergePoints* locator,
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vtkIdList* vertOffsets,
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vtkIdList* lineOffsets,
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vtkIdList* polyOffsets) : Input(input),
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Locator(locator),
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VertOffsets(vertOffsets),
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LineOffsets(lineOffsets),
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PolyOffsets(polyOffsets)
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{
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}
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};
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/**
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* Given a vector of vtkSMPMergePolyDataHelper::InputData, it merges
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* them and returns a new vtkPolyData (which needs to be deleted by the
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* caller). Note that this function uses the first input as a temporary
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* merging target so it will be modified in place. If you need to preserve
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* it, use DeepCopy before passing to MergePolyData.
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*/
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static vtkPolyData* MergePolyData(std::vector<InputData>& inputs);
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protected:
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vtkSMPMergePolyDataHelper();
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~vtkSMPMergePolyDataHelper();
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private:
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vtkSMPMergePolyDataHelper(const vtkSMPMergePolyDataHelper&) VTK_DELETE_FUNCTION;
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void operator=(const vtkSMPMergePolyDataHelper&) VTK_DELETE_FUNCTION;
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};
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#endif
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// VTK-HeaderTest-Exclude: vtkSMPMergePolyDataHelper.h
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