ContourTreeUniformAugmented.h

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//============================================================================
 
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// Lawrence Berkeley National Laboratory (subject to receipt of any required approvals
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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 viskores_filter_scalar_topology_ContourTreeUniformAugmented_h
#define viskores_filter_scalar_topology_ContourTreeUniformAugmented_h
 
#include <viskores/Types.h>
#include <viskores/cont/ArrayHandle.h>
 
#include <viskores/filter/Filter.h>
#include <viskores/filter/scalar_topology/viskores_filter_scalar_topology_export.h>
 
#include <viskores/filter/scalar_topology/worklet/contourtree_augmented/ContourTree.h>
#include <viskores/filter/scalar_topology/worklet/contourtree_distributed/MultiBlockContourTreeHelper.h>
 
#include <memory>
 
namespace viskores
{
namespace filter
{
namespace scalar_topology
{
class VISKORES_FILTER_SCALAR_TOPOLOGY_EXPORT ContourTreeAugmented : public viskores::filter::Filter
{
public:
  VISKORES_CONT bool CanThread() const override
  {
    // shared helper object MultiBlockTreeHelper.
    // TODO: need further investigation.
    return false;
  }
 
  VISKORES_CONT
  explicit ContourTreeAugmented(bool useMarchingCubes = false,
                                unsigned int computeRegularStructure = 1);
 
  VISKORES_CONT
  void SetBlockIndices(viskores::Id3 blocksPerDim,
                       const viskores::cont::ArrayHandle<viskores::Id3>& localBlockIndices);
 
  const viskores::worklet::contourtree_augmented::ContourTree& GetContourTree() const;
  const viskores::worklet::contourtree_augmented::IdArrayType& GetSortOrder() const;
  viskores::Id GetNumIterations() const;
 
private:
  VISKORES_CONT viskores::cont::DataSet DoExecute(const viskores::cont::DataSet& input) override;
  VISKORES_CONT viskores::cont::PartitionedDataSet DoExecutePartitions(
    const viskores::cont::PartitionedDataSet& inData) override;
 
  VISKORES_CONT void PreExecute(const viskores::cont::PartitionedDataSet& input);
 
  VISKORES_CONT void PostExecute(const viskores::cont::PartitionedDataSet& input,
                                 viskores::cont::PartitionedDataSet& output);
  template <typename T>
  VISKORES_CONT void DoPostExecute(const viskores::cont::PartitionedDataSet& input,
                                   viskores::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 viskores::filter::ResultField and what is the best way to represent them
  // Additional result fields not included in the viskores::filter::ResultField returned by DoExecute
 
  viskores::worklet::contourtree_augmented::ContourTree ContourTreeData;
  viskores::Id NumIterations = 0;
  viskores::worklet::contourtree_augmented::IdArrayType MeshSortOrder;
  std::unique_ptr<viskores::worklet::contourtree_distributed::MultiBlockContourTreeHelper>
    MultiBlockTreeHelper;
};
} // namespace scalar_topology
} // namespace filter
} // namespace viskores
 
#endif // viskores_filter_scalar_topology_ContourTreeUniformAugmented_h