73440ccb4e
Instead of having two separate implementations of MarchingCubes, we have a single implementation in worklet, and filter uses that. That does mean that the version in worklet has been updated to support merging of duplicate point coordinates.
149 lines
5.1 KiB
C++
149 lines
5.1 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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MarchingCubes::MarchingCubes():
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vtkm::filter::FilterDataSetWithField<MarchingCubes>(),
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IsoValue(0),
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GenerateNormals(false),
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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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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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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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//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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//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( static_cast<T>(this->IsoValue),
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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( static_cast<T>(this->IsoValue),
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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(std::string("normals"),
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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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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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