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https://gitlab.kitware.com/vtk/vtk-m
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c3a3184d51
Sandia National Laboratories recently changed management from the Sandia Corporation to the National Technology & Engineering Solutions of Sandia, LLC (NTESS). The copyright statements need to be updated accordingly.
62 lines
1.8 KiB
C++
62 lines
1.8 KiB
C++
//============================================================================
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// Copyright (c) Kitware, Inc.
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// All rights reserved.
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// See LICENSE.txt for details.
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// This software is distributed WITHOUT ANY WARRANTY; without even
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// the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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// PURPOSE. See the above copyright notice for more information.
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//
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// Copyright 2014 National Technology & Engineering Solutions of Sandia, LLC (NTESS).
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// Copyright 2014 UT-Battelle, LLC.
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// Copyright 2014 Los Alamos National Security.
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//
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// Under the terms of Contract DE-NA0003525 with NTESS,
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// the U.S. Government retains certain rights in this software.
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//
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// Under the terms of Contract DE-AC52-06NA25396 with Los Alamos National
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// Laboratory (LANL), the U.S. Government retains certain rights in
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// this software.
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//============================================================================
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#ifndef vtk_m_worklet_ComputeNDEntropy_h
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#define vtk_m_worklet_ComputeNDEntropy_h
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#include <vtkm/worklet/DispatcherMapField.h>
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namespace vtkm
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{
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namespace worklet
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{
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namespace histogram
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{
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// For each bin, calculate its information content (log2)
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class SetBinInformationContent : public vtkm::worklet::WorkletMapField
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{
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public:
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typedef void ControlSignature(FieldIn<> freq, FieldOut<> informationContent);
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typedef void ExecutionSignature(_1, _2);
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vtkm::Float64 FreqSum;
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VTKM_CONT
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SetBinInformationContent(vtkm::Float64 _freqSum)
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: FreqSum(_freqSum)
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{
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}
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template <typename FreqType>
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VTKM_EXEC void operator()(const FreqType& freq, vtkm::Float64& informationContent) const
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{
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vtkm::Float64 p = ((vtkm::Float64)freq) / FreqSum;
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if (p > 0)
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informationContent = -1 * p * vtkm::Log2(p);
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else
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informationContent = 0;
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}
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};
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}
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}
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} // namespace vtkm::worklet
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#endif // vtk_m_worklet_ComputeNDEntropy_h
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