FillSupernodes.h

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//  This code is based on 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.
 
#ifndef vtkm_worklet_contourtree_fill_supernodes_h
#define vtkm_worklet_contourtree_fill_supernodes_h
 
#include <vtkm/worklet/WorkletMapField.h>
 
namespace vtkm
{
namespace worklet
{
namespace contourtree
{
 
// Worklet
class FillSupernodes : public vtkm::worklet::WorkletMapField
{
public:
  using ControlSignature = void(FieldIn upCandidate,   // (input)
                                FieldIn downCandidate, // (input)
                                FieldOut isSupernode); // (output)
  using ExecutionSignature = _3(_1, _2);
  using InputDomain = _1;
 
  // Constructor
  VTKM_EXEC_CONT
  FillSupernodes() {}
 
  VTKM_EXEC
  vtkm::Id operator()(const vtkm::Id& upCandidate, const vtkm::Id& downCandidate) const
  {
    vtkm::Id isSupernode = ((upCandidate != 1) || (downCandidate != 1));
    return isSupernode;
  }
}; // FillSupernodes
}
}
}
 
#endif