mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-19 18:45:43 +00:00
8520d70e0d
VTK-m now provides the following filters with the default policy as part of the vtkm_filter library: - CellAverage - CleanGrid - ClipWithField - ClipWithImplicitFunction - Contour - ExternalFaces - ExtractStructured - PointAverage - Threshold - VectorMagnitude By building these as a library we hope to provide faster compile times for consumers of VTK-m when using common configurations.
123 lines
4.2 KiB
C++
123 lines
4.2 KiB
C++
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//============================================================================
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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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#define vtkm_filter_CleanGrid_cxx
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#include <vtkm/filter/CleanGrid.h>
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#include <vtkm/filter/CleanGrid.hxx>
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namespace vtkm
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{
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namespace filter
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{
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//-----------------------------------------------------------------------------
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CleanGrid::CleanGrid()
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: CompactPointFields(true)
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, MergePoints(true)
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, Tolerance(1.0e-6)
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, ToleranceIsAbsolute(false)
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, RemoveDegenerateCells(true)
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, FastMerge(true)
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{
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}
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//-----------------------------------------------------------------------------
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vtkm::cont::DataSet CleanGrid::GenerateOutput(const vtkm::cont::DataSet& inData,
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vtkm::cont::CellSetExplicit<>& outputCellSet)
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{
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using VecId = std::size_t;
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const VecId activeCoordIndex = static_cast<VecId>(this->GetActiveCoordinateSystemIndex());
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const VecId numCoordSystems = static_cast<VecId>(inData.GetNumberOfCoordinateSystems());
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std::vector<vtkm::cont::CoordinateSystem> outputCoordinateSystems(numCoordSystems);
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// Start with a shallow copy of the coordinate systems
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for (VecId coordSystemIndex = 0; coordSystemIndex < numCoordSystems; ++coordSystemIndex)
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{
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outputCoordinateSystems[coordSystemIndex] =
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inData.GetCoordinateSystem(static_cast<vtkm::IdComponent>(coordSystemIndex));
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}
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// Optionally adjust the cell set indices to remove all unused points
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if (this->GetCompactPointFields())
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{
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this->PointCompactor.FindPointsStart();
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this->PointCompactor.FindPoints(outputCellSet);
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this->PointCompactor.FindPointsEnd();
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outputCellSet = this->PointCompactor.MapCellSet(outputCellSet);
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for (VecId coordSystemIndex = 0; coordSystemIndex < numCoordSystems; ++coordSystemIndex)
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{
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outputCoordinateSystems[coordSystemIndex] =
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vtkm::cont::CoordinateSystem(outputCoordinateSystems[coordSystemIndex].GetName(),
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this->PointCompactor.MapPointFieldDeep(
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outputCoordinateSystems[coordSystemIndex].GetData()));
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}
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}
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// Optionally find and merge coincident points
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if (this->GetMergePoints())
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{
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vtkm::cont::CoordinateSystem activeCoordSystem = outputCoordinateSystems[activeCoordIndex];
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vtkm::Bounds bounds = activeCoordSystem.GetBounds();
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vtkm::Float64 delta = this->GetTolerance();
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if (!this->GetToleranceIsAbsolute())
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{
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delta *=
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vtkm::Magnitude(vtkm::make_Vec(bounds.X.Length(), bounds.Y.Length(), bounds.Z.Length()));
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}
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auto coordArray = activeCoordSystem.GetData();
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this->PointMerger.Run(delta, this->GetFastMerge(), bounds, coordArray);
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activeCoordSystem = vtkm::cont::CoordinateSystem(activeCoordSystem.GetName(), coordArray);
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for (VecId coordSystemIndex = 0; coordSystemIndex < numCoordSystems; ++coordSystemIndex)
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{
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if (coordSystemIndex == activeCoordIndex)
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{
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outputCoordinateSystems[coordSystemIndex] = activeCoordSystem;
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}
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else
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{
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outputCoordinateSystems[coordSystemIndex] = vtkm::cont::CoordinateSystem(
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outputCoordinateSystems[coordSystemIndex].GetName(),
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this->PointMerger.MapPointField(outputCoordinateSystems[coordSystemIndex].GetData()));
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}
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}
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outputCellSet = this->PointMerger.MapCellSet(outputCellSet);
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}
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// Optionally remove degenerate cells
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if (this->GetRemoveDegenerateCells())
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{
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outputCellSet = this->CellCompactor.Run(outputCellSet);
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}
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// Construct resulting data set with new cell sets
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vtkm::cont::DataSet outData;
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outData.SetCellSet(outputCellSet);
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// Pass the coordinate systems
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for (VecId coordSystemIndex = 0; coordSystemIndex < numCoordSystems; ++coordSystemIndex)
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{
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outData.AddCoordinateSystem(outputCoordinateSystems[coordSystemIndex]);
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}
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return outData;
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}
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//-----------------------------------------------------------------------------
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VTKM_FILTER_INSTANTIATE_EXECUTE_METHOD(CleanGrid);
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}
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}
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