210 lines
6.7 KiB
C++
210 lines
6.7 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 Sandia Corporation.
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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-AC04-94AL85000 with Sandia Corporation,
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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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#include <vtkm/cont/ArrayHandleIndex.h>
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#include <vtkm/cont/DynamicCellSet.h>
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#include <vtkm/cont/CellSetSingleType.h>
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#include <vtkm/worklet/DispatcherMapTopology.h>
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#include <vtkm/worklet/ScatterCounting.h>
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namespace vtkm {
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namespace filter {
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//-----------------------------------------------------------------------------
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inline VTKM_CONT
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MarchingCubes::MarchingCubes():
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vtkm::filter::FilterDataSetWithField<MarchingCubes>(),
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IsoValues(),
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GenerateNormals(false),
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NormalArrayName("normals"),
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Worklet()
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{
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// todo: keep an instance of marching cubes worklet as a member variable
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}
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//-----------------------------------------------------------------------------
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inline
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void MarchingCubes::SetNumberOfIsoValues(vtkm::Id num)
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{
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if(num >= 0)
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{
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this->IsoValues.resize(static_cast<std::size_t>(num));
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}
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}
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//-----------------------------------------------------------------------------
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inline
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vtkm::Id MarchingCubes::GetNumberOfIsoValues() const
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{
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return static_cast<vtkm::Id>(this->IsoValues.size());
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}
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//-----------------------------------------------------------------------------
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inline
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void MarchingCubes::SetIsoValue(vtkm::Id index, vtkm::Float64 v)
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{
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std::size_t i = static_cast<std::size_t>(index);
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if(i >= this->IsoValues.size())
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{
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this->IsoValues.resize(i+1);
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}
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this->IsoValues[i] = v;
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}
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//-----------------------------------------------------------------------------
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inline
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void MarchingCubes::SetIsoValues(const std::vector<vtkm::Float64>& values)
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{
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this->IsoValues = values;
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}
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//-----------------------------------------------------------------------------
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inline
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vtkm::Float64 MarchingCubes::GetIsoValue(vtkm::Id index) const
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{
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return this->IsoValues[static_cast<std::size_t>(index)];
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}
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//-----------------------------------------------------------------------------
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template<typename T,
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typename StorageType,
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typename DerivedPolicy,
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typename DeviceAdapter>
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inline VTKM_CONT
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vtkm::filter::ResultDataSet MarchingCubes::DoExecute(const vtkm::cont::DataSet& input,
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const vtkm::cont::ArrayHandle<T, StorageType>& field,
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const vtkm::filter::FieldMetadata& fieldMeta,
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const vtkm::filter::PolicyBase<DerivedPolicy>& policy,
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const DeviceAdapter& device)
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{
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if(fieldMeta.IsPointField() == false)
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{
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//todo: we need to mark this as a failure of input, not a failure
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//of the algorithm
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return vtkm::filter::ResultDataSet();
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}
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if(this->IsoValues.size() == 0)
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{
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return vtkm::filter::ResultDataSet();
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}
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//get the cells and coordinates of the dataset
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const vtkm::cont::DynamicCellSet& cells =
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input.GetCellSet(this->GetActiveCellSetIndex());
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const vtkm::cont::CoordinateSystem& coords =
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input.GetCoordinateSystem(this->GetActiveCoordinateSystemIndex());
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typedef vtkm::cont::ArrayHandle< vtkm::Vec< vtkm::FloatDefault,3> > Vec3HandleType;
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Vec3HandleType vertices;
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Vec3HandleType normals;
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vtkm::cont::DataSet output;
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vtkm::cont::CellSetSingleType< > outputCells;
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std::vector<T> ivalues(this->IsoValues.size());
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for(std::size_t i = 0; i < ivalues.size(); ++i)
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{
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ivalues[i] = static_cast<T>(this->IsoValues[i]);
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}
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//not sold on this as we have to generate more signatures for the
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//worklet with the design
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//But I think we should get this to compile before we tinker with
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//a more efficient api
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if(this->GenerateNormals)
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{
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outputCells =
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this->Worklet.Run( &ivalues[0],
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static_cast<vtkm::Id>(ivalues.size()),
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vtkm::filter::ApplyPolicy(cells, policy),
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vtkm::filter::ApplyPolicy(coords, policy),
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field,
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vertices,
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normals,
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device
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);
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}
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else
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{
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outputCells =
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this->Worklet.Run( &ivalues[0],
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static_cast<vtkm::Id>(ivalues.size()),
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vtkm::filter::ApplyPolicy(cells, policy),
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vtkm::filter::ApplyPolicy(coords, policy),
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field,
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vertices,
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device
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);
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}
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if(this->GenerateNormals)
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{
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vtkm::cont::Field normalField(this->NormalArrayName,
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vtkm::cont::Field::ASSOC_POINTS, normals);
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output.AddField( normalField );
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}
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//assign the connectivity to the cell set
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output.AddCellSet( outputCells );
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//add the coordinates to the output dataset
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vtkm::cont::CoordinateSystem outputCoords("coordinates", vertices);
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output.AddCoordinateSystem( outputCoords );
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return vtkm::filter::ResultDataSet(output);
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}
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//-----------------------------------------------------------------------------
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template<typename T,
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typename StorageType,
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typename DerivedPolicy,
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typename DeviceAdapter>
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inline VTKM_CONT
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bool MarchingCubes::DoMapField(vtkm::filter::ResultDataSet& result,
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const vtkm::cont::ArrayHandle<T, StorageType>& input,
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const vtkm::filter::FieldMetadata& fieldMeta,
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const vtkm::filter::PolicyBase<DerivedPolicy>&,
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const DeviceAdapter& device)
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{
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if(fieldMeta.IsPointField() == false)
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{
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//not a point field, we can't map it
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return false;
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}
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vtkm::cont::ArrayHandle<T> output;
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this->Worklet.MapFieldOntoIsosurface( input, output, device);
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//use the same meta data as the input so we get the same field name, etc.
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result.GetDataSet().AddField( fieldMeta.AsField(output) );
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return true;
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}
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}
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} // namespace vtkm::filter
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