ResetDegrees.h

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//  Copyright (c) 2016, Los Alamos National Security, LLC
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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_reset_degrees_h
#define vtkm_worklet_contourtree_reset_degrees_h
 
#include <vtkm/worklet/WorkletMapField.h>
 
namespace vtkm
{
namespace worklet
{
namespace contourtree
{
 
// Worklet for doing regular to candidate
class ResetDegrees : public vtkm::worklet::WorkletMapField
{
public:
  using ControlSignature = void(FieldIn superID,           // input
                                WholeArrayOut updegree,    // output
                                WholeArrayOut downdegree); // output
  using ExecutionSignature = void(_1, _2, _3);
  using InputDomain = _1;
 
  // Constructor
  VTKM_EXEC_CONT
  ResetDegrees() {}
 
  template <typename OutFieldPortalType>
  VTKM_EXEC void operator()(const vtkm::Id& superId,
                            const OutFieldPortalType& updegree,
                            const OutFieldPortalType& downdegree) const
  {
    updegree.Set(superId, 0);
    downdegree.Set(superId, 0);
  }
}; // ResetDegrees
}
}
}
 
#endif