ContourTreeUniformDistributed.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.
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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_ContourTreeUniformDistributed_h
#define vtk_m_filter_scalar_topology_ContourTreeUniformDistributed_h
 
#include <vtkm/Types.h>
#include <vtkm/cont/ArrayHandle.h>
#include <vtkm/filter/scalar_topology/worklet/contourtree_augmented/ContourTree.h>
#include <vtkm/filter/scalar_topology/worklet/contourtree_augmented/DataSetMesh.h>
#include <vtkm/filter/scalar_topology/worklet/contourtree_distributed/BoundaryTree.h>
#include <vtkm/filter/scalar_topology/worklet/contourtree_distributed/HierarchicalContourTree.h>
#include <vtkm/filter/scalar_topology/worklet/contourtree_distributed/InteriorForest.h>
 
#include <memory>
#include <vtkm/filter/Filter.h>
#include <vtkm/filter/scalar_topology/vtkm_filter_scalar_topology_export.h>
 
namespace vtkm
{
namespace filter
{
namespace scalar_topology
{
class VTKM_FILTER_SCALAR_TOPOLOGY_EXPORT ContourTreeUniformDistributed : public vtkm::filter::Filter
{
public:
  VTKM_CONT bool CanThread() const override
  {
    // tons of shared mutable states
    return false;
  }
 
  ContourTreeUniformDistributed(vtkm::cont::LogLevel timingsLogLevel = vtkm::cont::LogLevel::Perf,
                                vtkm::cont::LogLevel treeLogLevel = vtkm::cont::LogLevel::Info);
 
  VTKM_CONT void SetUseBoundaryExtremaOnly(bool useBoundaryExtremaOnly)
  {
    this->UseBoundaryExtremaOnly = useBoundaryExtremaOnly;
  }
 
  VTKM_CONT bool GetUseBoundaryExtremaOnly() { return this->UseBoundaryExtremaOnly; }
 
  VTKM_CONT void SetUseMarchingCubes(bool useMarchingCubes)
  {
    this->UseMarchingCubes = useMarchingCubes;
  }
 
  VTKM_CONT bool GetUseMarchingCubes() { return this->UseMarchingCubes; }
 
  VTKM_CONT void SetAugmentHierarchicalTree(bool augmentHierarchicalTree)
  {
    this->AugmentHierarchicalTree = augmentHierarchicalTree;
  }
 
  VTKM_CONT void SetPresimplifyThreshold(vtkm::Id presimplifyThreshold)
  {
    this->PresimplifyThreshold = presimplifyThreshold;
  }
 
  VTKM_CONT void SetBlockIndices(vtkm::Id3 blocksPerDim,
                                 const vtkm::cont::ArrayHandle<vtkm::Id3>& localBlockIndices)
  {
    this->BlocksPerDimension = blocksPerDim;
    vtkm::cont::ArrayCopy(localBlockIndices, this->LocalBlockIndices);
  }
 
  VTKM_CONT bool GetAugmentHierarchicalTree() { return this->AugmentHierarchicalTree; }
 
  VTKM_CONT vtkm::Id GetPresimplifyThreshold() { return this->PresimplifyThreshold; }
 
  VTKM_CONT void SetSaveDotFiles(bool saveDotFiles) { this->SaveDotFiles = saveDotFiles; }
 
  VTKM_CONT bool GetSaveDotFiles() { return this->SaveDotFiles; }
 
  template <typename T, typename StorageType>
  VTKM_CONT void ComputeLocalTree(const vtkm::Id blockIndex,
                                  const vtkm::cont::DataSet& input,
                                  const vtkm::cont::ArrayHandle<T, StorageType>& fieldArray);
 
  template <typename T, typename StorageType, typename MeshType, typename MeshBoundaryExecType>
  VTKM_CONT void ComputeLocalTreeImpl(const vtkm::Id blockIndex,
                                      const vtkm::cont::DataSet& input,
                                      const vtkm::cont::ArrayHandle<T, StorageType>& field,
                                      MeshType& mesh,
                                      MeshBoundaryExecType& meshBoundaryExecObject);
 
private:
  VTKM_CONT vtkm::cont::DataSet DoExecute(const vtkm::cont::DataSet& input) override;
  VTKM_CONT vtkm::cont::PartitionedDataSet DoExecutePartitions(
    const vtkm::cont::PartitionedDataSet& input) 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 FieldType>
  VTKM_CONT void ComputeVolumeMetric(
    vtkmdiy::Master& inputContourTreeMaster,
    vtkmdiy::DynamicAssigner& assigner,
    vtkmdiy::RegularSwapPartners& partners,
    const FieldType&, // dummy parameter to get the type
    std::stringstream& timingsStream,
    const vtkm::cont::PartitionedDataSet& input,
    bool useAugmentedTree,
    std::vector<vtkm::cont::ArrayHandle<vtkm::Id>>& intrinsicVolumes,
    std::vector<vtkm::cont::ArrayHandle<vtkm::Id>>& dependentVolumes);
 
  template <typename T>
  VTKM_CONT void DoPostExecute(const vtkm::cont::PartitionedDataSet& input,
                               vtkm::cont::PartitionedDataSet& output);
 
  bool UseBoundaryExtremaOnly;
 
  bool UseMarchingCubes;
 
  bool AugmentHierarchicalTree;
 
  vtkm::Id PresimplifyThreshold;
 
  bool SaveDotFiles;
 
  vtkm::cont::LogLevel TimingsLogLevel = vtkm::cont::LogLevel::Perf;
 
  vtkm::cont::LogLevel TreeLogLevel = vtkm::cont::LogLevel::Info;
 
  // ... Number of blocks along each dimension
  vtkm::Id3 BlocksPerDimension;
  // ... Index of the local blocks in x,y,z, i.e., in i,j,k mesh coordinates
  vtkm::cont::ArrayHandle<vtkm::Id3> LocalBlockIndices;
 
  std::vector<vtkm::worklet::contourtree_augmented::DataSetMesh> LocalMeshes;
  std::vector<vtkm::worklet::contourtree_augmented::ContourTree> LocalContourTrees;
  std::vector<vtkm::worklet::contourtree_distributed::BoundaryTree> LocalBoundaryTrees;
  std::vector<vtkm::worklet::contourtree_distributed::InteriorForest> LocalInteriorForests;
 
  // TODO/FIXME: We need to find a way to store the final hieararchical trees somewhere.
  // Currently we cannot do this here as it is a template on FieldType
  //
  //std::vector<vtkm::worklet::contourtree_distributed::HierarchicalContourTree> HierarchicalContourTrees;
  vtkm::Id NumIterations;
};
} // namespace scalar_topology
} // namespace filter
} // namespace vtkm
 
#endif // vtk_m_filter_scalar_topology_ContourTreeUniformDistributed_h