ContourTreeUniformAugmented.h

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//  PURPOSE.  See the above copyright notice for more information.
//============================================================================
// Copyright (c) 2018, The Regents of the University of California, through
// Lawrence Berkeley National Laboratory (subject to receipt of any required approvals
// from the U.S. Dept. of Energy).  All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification,
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//     list of conditions and the following disclaimer.
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//     Laboratory, U.S. Dept. of Energy nor the names of its contributors may be
//     used to endorse or promote products derived from this software without
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//=============================================================================
//
//  This code is an extension of the algorithm presented in the paper:
//  Parallel Peak Pruning for Scalable SMP Contour Tree Computation.
//  Hamish Carr, Gunther Weber, Christopher Sewell, and James Ahrens.
//  Proceedings of the IEEE Symposium on Large Data Analysis and Visualization
//  (LDAV), October 2016, Baltimore, Maryland.
//
//  The PPP2 algorithm and software were jointly developed by
//  Hamish Carr (University of Leeds), Gunther H. Weber (LBNL), and
//  Oliver Ruebel (LBNL)
//==============================================================================
 
#ifndef vtk_m_filter_scalar_topology_ContourTreeUniformAugmented_h
#define vtk_m_filter_scalar_topology_ContourTreeUniformAugmented_h
 
#include <vtkm/Types.h>
#include <vtkm/cont/ArrayHandle.h>
 
#include <vtkm/filter/Filter.h>
#include <vtkm/filter/scalar_topology/vtkm_filter_scalar_topology_export.h>
 
#include <vtkm/filter/scalar_topology/worklet/contourtree_augmented/ContourTree.h>
#include <vtkm/filter/scalar_topology/worklet/contourtree_distributed/MultiBlockContourTreeHelper.h>
 
#include <memory>
 
namespace vtkm
{
namespace filter
{
namespace scalar_topology
{
class VTKM_FILTER_SCALAR_TOPOLOGY_EXPORT ContourTreeAugmented : public vtkm::filter::Filter
{
public:
  VTKM_CONT bool CanThread() const override
  {
    // shared helper object MultiBlockTreeHelper.
    // TODO: need further investigation.
    return false;
  }
 
  VTKM_CONT
  explicit ContourTreeAugmented(bool useMarchingCubes = false,
                                unsigned int computeRegularStructure = 1);
 
  VTKM_CONT
  void SetBlockIndices(vtkm::Id3 blocksPerDim,
                       const vtkm::cont::ArrayHandle<vtkm::Id3>& localBlockIndices);
 
  const vtkm::worklet::contourtree_augmented::ContourTree& GetContourTree() const;
  const vtkm::worklet::contourtree_augmented::IdArrayType& GetSortOrder() const;
  vtkm::Id GetNumIterations() const;
 
private:
  VTKM_CONT vtkm::cont::DataSet DoExecute(const vtkm::cont::DataSet& input) override;
  VTKM_CONT vtkm::cont::PartitionedDataSet DoExecutePartitions(
    const vtkm::cont::PartitionedDataSet& inData) override;
 
  VTKM_CONT void PreExecute(const vtkm::cont::PartitionedDataSet& input);
 
  VTKM_CONT void PostExecute(const vtkm::cont::PartitionedDataSet& input,
                             vtkm::cont::PartitionedDataSet& output);
  template <typename T>
  VTKM_CONT void DoPostExecute(const vtkm::cont::PartitionedDataSet& input,
                               vtkm::cont::PartitionedDataSet& output);
 
  bool UseMarchingCubes;
  // 0=no augmentation, 1=full augmentation, 2=boundary augmentation
  unsigned int ComputeRegularStructure;
 
  // TODO Should the additional fields below be add to the vtkm::filter::ResultField and what is the best way to represent them
  // Additional result fields not included in the vtkm::filter::ResultField returned by DoExecute
 
  vtkm::worklet::contourtree_augmented::ContourTree ContourTreeData;
  vtkm::Id NumIterations = 0;
  vtkm::worklet::contourtree_augmented::IdArrayType MeshSortOrder;
  std::unique_ptr<vtkm::worklet::contourtree_distributed::MultiBlockContourTreeHelper>
    MultiBlockTreeHelper;
};
} // namespace scalar_topology
} // namespace filter
} // namespace vtkm
 
#endif // vtk_m_filter_scalar_topology_ContourTreeUniformAugmented_h