LocalBestUpDownByVolumeBestUpDownEdgeWorklet.h

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#ifndef vtk_m_filter_scalar_topology_worklet_branch_decomposition_hierarchical_volumetric_branch_decomposer_LocalBestUpDownByVolumeBestUpDownEdgeWorklet_h
#define vtk_m_filter_scalar_topology_worklet_branch_decomposition_hierarchical_volumetric_branch_decomposer_LocalBestUpDownByVolumeBestUpDownEdgeWorklet_h
 
#include <vtkm/filter/scalar_topology/worklet/contourtree_augmented/Types.h>
#include <vtkm/worklet/WorkletMapField.h>
 
namespace vtkm
{
namespace worklet
{
namespace scalar_topology
{
namespace hierarchical_volumetric_branch_decomposer
{
 
class LocalBestUpDownByVolumeBestUpDownEdgeWorklet : public vtkm::worklet::WorkletMapField
{
public:
  using ControlSignature = void(
    FieldIn
      permutedHierarchicalTreeSuperarcs, // hierarchicalTree.Superarcs permuted by actualSuperarcs
    FieldIn permutedDependetValues,      // dependentValues permuted by actualSuperarcs
    FieldIn permutedIntrinsicValues,     // intrinsicValues permuted by actualSuperarcs
    FieldOut permutedUpVolume,           // upVolume permuted by actualSuperarcs
    FieldOut permitedDownVolume          // downVolume permited by actualSuperarcs
  );
  using ExecutionSignature = void(_1, _2, _3, _4, _5);
  using InputDomain = _1;
 
  VTKM_EXEC_CONT
  LocalBestUpDownByVolumeBestUpDownEdgeWorklet(const vtkm::Id totalVolume)
    : TotalVolume(totalVolume)
  {
  }
 
  template <typename FieldType>
  VTKM_EXEC void operator()(
    const vtkm::Id&
      hierarchicalTreeSuperarc,      // hierarchicalTree.superarcs[actualSuperarcs[InputIndex]]
    const FieldType& dependentValue, // dependentValues[actualSuperarcs[InputIndex]]
    const FieldType& intrinsicValue, // intrinsicValues[actualSuperarcs[InputIndex]]
    vtkm::Id& upVolume,              // upVolume[actualSuperarcs[InputIndex]]
    vtkm::Id& downVolume             // downVolume[actualSuperarcs[InputIndex]]
  ) const
  {
    // per actual superarc
    // retrieve the superarc Id (down via the superarcId FieldIn parameter)
    if (vtkm::worklet::contourtree_augmented::IsAscending(hierarchicalTreeSuperarc))
    { // ascending superarc
      upVolume = dependentValue;
      // at the inner end, dependent volume is the total in the subtree.  Then there are vertices along the edge
      // itself (intrinsic volume), including the supernode at the outer end
      // So, to get the "dependent" volume in the other direction, we start
      // with totalVolume - dependent, then subtract (intrinsic - 1)
      downVolume = (this->TotalVolume - dependentValue) + (intrinsicValue - 1);
    } // ascending superarc
    else
    { // descending superarc
      downVolume = dependentValue;
      // at the inner end, dependent volume is the total in the subtree.  Then there are vertices along the edge
      // itself (intrinsic volume), including the supernode at the outer end
      // So, to get the "dependent" volume in the other direction, we start
      // with totalVolume - dependent, then subtract (intrinsic - 1)
      upVolume = (this->TotalVolume - dependentValue) + (intrinsicValue - 1);
    } // descending superarc
 
    /* // This worklet implements the follwing loop
         for (vtkm::Id actualSuperarc = 0; actualSuperarc < nActualSuperarcs; actualSuperarc++)
      { // per actual superarc
        // retrieve the superarc ID
        vtkm::Id superarcID = actualSuperarcs[actualSuperarc];
        if (isAscending(hierarchicalTree.superarcs[superarcID]))
          { // ascending superarc
          upVolume[superarcID] = dependentValues[superarcID];
          // at the inner end, dependent volume is the total in the subtree.  Then there are vertices along the edge itself (intrinsic volume), including the supernode at the outer end
          // So, to get the "dependent" volume in the other direction, we start with totalVolume - dependent, then subtract (intrinsic - 1)
          downVolume[superarcID] = (totalVolume - dependentValues[superarcID]) + (intrinsicValues[superarcID] - 1);
          } // ascending superarc
        else
          { // descending superarc
          downVolume[superarcID] = dependentValues[superarcID];
          // at the inner end, dependent volume is the total in the subtree.  Then there are vertices along the edge itself (intrinsic volume), including the supernode at the outer end
          // So, to get the "dependent" volume in the other direction, we start with totalVolume - dependent, then subtract (intrinsic - 1)
          upVolume[superarcID] = (totalVolume - dependentValues[superarcID]) + (intrinsicValues[superarcID] - 1);
          } // descending superarc
      } // per superarc
     */
  } // operator()()
 
private:
  vtkm::Id TotalVolume;
 
}; // LocalBestUpDownByVolumeBestUpDownEdgeWorklet
 
} // namespace hierarchical_volumetric_branch_decomposer
} // namespace scalar_topology
} // namespace worklet
} // namespace vtkm
 
#endif