225 lines
7.6 KiB
C++
225 lines
7.6 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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//
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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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#include <vtkm/source/Oscillator.h>
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#include <vtkm/worklet/WorkletMapField.h>
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namespace vtkm
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{
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namespace source
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{
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namespace internal
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{
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struct Oscillator
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{
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vtkm::Vec3f Center;
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vtkm::FloatDefault Radius;
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vtkm::FloatDefault Omega;
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vtkm::FloatDefault Zeta;
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};
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class OscillatorSource : public vtkm::worklet::WorkletMapField
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{
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public:
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typedef void ControlSignature(FieldIn, FieldOut);
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typedef _2 ExecutionSignature(_1);
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VTKM_CONT
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void AddPeriodic(vtkm::FloatDefault x,
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vtkm::FloatDefault y,
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vtkm::FloatDefault z,
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vtkm::FloatDefault radius,
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vtkm::FloatDefault omega,
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vtkm::FloatDefault zeta)
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{
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if (this->PeriodicOscillators.GetNumberOfComponents() < MAX_OSCILLATORS)
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{
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this->PeriodicOscillators.Append(Oscillator{ { x, y, z }, radius, omega, zeta });
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}
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}
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VTKM_CONT
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void AddDamped(vtkm::FloatDefault x,
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vtkm::FloatDefault y,
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vtkm::FloatDefault z,
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vtkm::FloatDefault radius,
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vtkm::FloatDefault omega,
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vtkm::FloatDefault zeta)
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{
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if (this->DampedOscillators.GetNumberOfComponents() < MAX_OSCILLATORS)
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{
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this->DampedOscillators.Append(Oscillator{ { x, y, z }, radius, omega, zeta });
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}
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}
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VTKM_CONT
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void AddDecaying(vtkm::FloatDefault x,
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vtkm::FloatDefault y,
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vtkm::FloatDefault z,
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vtkm::FloatDefault radius,
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vtkm::FloatDefault omega,
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vtkm::FloatDefault zeta)
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{
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if (this->DecayingOscillators.GetNumberOfComponents() < MAX_OSCILLATORS)
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{
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this->DecayingOscillators.Append(Oscillator{ { x, y, z }, radius, omega, zeta });
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}
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}
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VTKM_CONT
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void SetTime(vtkm::FloatDefault time) { this->Time = time; }
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VTKM_EXEC
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vtkm::FloatDefault operator()(const vtkm::Vec3f& vec) const
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{
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vtkm::UInt8 oIdx;
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vtkm::FloatDefault t0, t, result = 0;
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const internal::Oscillator* oscillator;
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t0 = 0.0;
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t = vtkm::FloatDefault(this->Time * 2 * 3.14159265358979323846);
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// Compute damped
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for (oIdx = 0; oIdx < this->DampedOscillators.GetNumberOfComponents(); oIdx++)
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{
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oscillator = &this->DampedOscillators[oIdx];
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vtkm::Vec3f delta = oscillator->Center - vec;
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vtkm::FloatDefault dist2 = dot(delta, delta);
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vtkm::FloatDefault dist_damp =
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vtkm::Exp(-dist2 / (2 * oscillator->Radius * oscillator->Radius));
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vtkm::FloatDefault phi = vtkm::ACos(oscillator->Zeta);
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vtkm::FloatDefault val = vtkm::FloatDefault(
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1. -
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vtkm::Exp(-oscillator->Zeta * oscillator->Omega * t0) *
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(vtkm::Sin(vtkm::Sqrt(1 - oscillator->Zeta * oscillator->Zeta) * oscillator->Omega * t +
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phi) /
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vtkm::Sin(phi)));
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result += val * dist_damp;
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}
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// Compute decaying
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for (oIdx = 0; oIdx < this->DecayingOscillators.GetNumberOfComponents(); oIdx++)
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{
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oscillator = &this->DecayingOscillators[oIdx];
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t = t0 + 1 / oscillator->Omega;
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vtkm::Vec3f delta = oscillator->Center - vec;
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vtkm::FloatDefault dist2 = dot(delta, delta);
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vtkm::FloatDefault dist_damp =
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vtkm::Exp(-dist2 / (2 * oscillator->Radius * oscillator->Radius));
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vtkm::FloatDefault val = vtkm::Sin(t / oscillator->Omega) / (oscillator->Omega * t);
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result += val * dist_damp;
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}
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// Compute periodic
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for (oIdx = 0; oIdx < this->PeriodicOscillators.GetNumberOfComponents(); oIdx++)
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{
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oscillator = &this->PeriodicOscillators[oIdx];
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t = t0 + 1 / oscillator->Omega;
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vtkm::Vec3f delta = oscillator->Center - vec;
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vtkm::FloatDefault dist2 = dot(delta, delta);
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vtkm::FloatDefault dist_damp =
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vtkm::Exp(-dist2 / (2 * oscillator->Radius * oscillator->Radius));
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vtkm::FloatDefault val = vtkm::Sin(t / oscillator->Omega);
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result += val * dist_damp;
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}
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// We are done...
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return result;
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}
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private:
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static constexpr vtkm::IdComponent MAX_OSCILLATORS = 10;
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vtkm::VecVariable<internal::Oscillator, MAX_OSCILLATORS> PeriodicOscillators;
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vtkm::VecVariable<internal::Oscillator, MAX_OSCILLATORS> DampedOscillators;
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vtkm::VecVariable<internal::Oscillator, MAX_OSCILLATORS> DecayingOscillators;
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vtkm::FloatDefault Time;
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}; // OscillatorSource
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} // internal
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//-----------------------------------------------------------------------------
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Oscillator::Oscillator(vtkm::Id3 dims)
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: Dims(dims)
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, Worklet(std::make_unique<internal::OscillatorSource>())
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{
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}
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Oscillator::~Oscillator() = default;
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//-----------------------------------------------------------------------------
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void Oscillator::SetTime(vtkm::FloatDefault time)
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{
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this->Worklet->SetTime(time);
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}
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//-----------------------------------------------------------------------------
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void Oscillator::AddPeriodic(vtkm::FloatDefault x,
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vtkm::FloatDefault y,
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vtkm::FloatDefault z,
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vtkm::FloatDefault radius,
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vtkm::FloatDefault omega,
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vtkm::FloatDefault zeta)
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{
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this->Worklet->AddPeriodic(x, y, z, radius, omega, zeta);
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}
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//-----------------------------------------------------------------------------
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void Oscillator::AddDamped(vtkm::FloatDefault x,
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vtkm::FloatDefault y,
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vtkm::FloatDefault z,
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vtkm::FloatDefault radius,
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vtkm::FloatDefault omega,
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vtkm::FloatDefault zeta)
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{
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this->Worklet->AddDamped(x, y, z, radius, omega, zeta);
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}
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//-----------------------------------------------------------------------------
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void Oscillator::AddDecaying(vtkm::FloatDefault x,
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vtkm::FloatDefault y,
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vtkm::FloatDefault z,
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vtkm::FloatDefault radius,
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vtkm::FloatDefault omega,
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vtkm::FloatDefault zeta)
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{
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this->Worklet->AddDecaying(x, y, z, radius, omega, zeta);
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}
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//-----------------------------------------------------------------------------
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vtkm::cont::DataSet Oscillator::Execute() const
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{
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VTKM_LOG_SCOPE_FUNCTION(vtkm::cont::LogLevel::Perf);
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vtkm::cont::DataSet dataSet;
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const vtkm::Id3 pdims{ this->Dims + vtkm::Id3{ 1, 1, 1 } };
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vtkm::cont::CellSetStructured<3> cellSet;
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cellSet.SetPointDimensions(pdims);
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dataSet.SetCellSet(cellSet);
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const vtkm::Vec3f origin(0.0f, 0.0f, 0.0f);
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const vtkm::Vec3f spacing(1.0f / static_cast<vtkm::FloatDefault>(this->Dims[0]),
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1.0f / static_cast<vtkm::FloatDefault>(this->Dims[1]),
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1.0f / static_cast<vtkm::FloatDefault>(this->Dims[2]));
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vtkm::cont::ArrayHandleUniformPointCoordinates coordinates(pdims, origin, spacing);
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dataSet.AddCoordinateSystem(vtkm::cont::CoordinateSystem("coordinates", coordinates));
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vtkm::cont::ArrayHandle<vtkm::FloatDefault> outArray;
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this->Invoke(*(this->Worklet), coordinates, outArray);
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dataSet.AddField(vtkm::cont::make_FieldPoint("oscillating", outArray));
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return dataSet;
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}
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}
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} // namespace vtkm::filter
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