mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-19 18:45:43 +00:00
346 lines
13 KiB
C++
346 lines
13 KiB
C++
//============================================================================
|
|
// Copyright (c) Kitware, Inc.
|
|
// All rights reserved.
|
|
// See LICENSE.txt for details.
|
|
// This software is distributed WITHOUT ANY WARRANTY; without even
|
|
// the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
|
|
// PURPOSE. See the above copyright notice for more information.
|
|
//
|
|
// Copyright 2014 Sandia Corporation.
|
|
// Copyright 2014 UT-Battelle, LLC.
|
|
// Copyright 2014 Los Alamos National Security.
|
|
//
|
|
// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
|
|
// the U.S. Government retains certain rights in this software.
|
|
//
|
|
// Under the terms of Contract DE-AC52-06NA25396 with Los Alamos National
|
|
// Laboratory (LANL), the U.S. Government retains certain rights in
|
|
// this software.
|
|
//============================================================================
|
|
|
|
#ifndef vtk_m_worklet_TetrahedralizeExplicitGrid_h
|
|
#define vtk_m_worklet_TetrahedralizeExplicitGrid_h
|
|
|
|
#include <vtkm/cont/DeviceAdapter.h>
|
|
#include <vtkm/cont/ArrayHandle.h>
|
|
#include <vtkm/cont/ArrayHandleCounting.h>
|
|
#include <vtkm/cont/DynamicArrayHandle.h>
|
|
#include <vtkm/cont/DataSet.h>
|
|
#include <vtkm/cont/CellSetExplicit.h>
|
|
#include <vtkm/cont/Field.h>
|
|
|
|
#include <vtkm/worklet/DispatcherMapField.h>
|
|
#include <vtkm/worklet/WorkletMapField.h>
|
|
#include <vtkm/worklet/DispatcherMapTopology.h>
|
|
#include <vtkm/worklet/WorkletMapTopology.h>
|
|
|
|
#include <vtkm/exec/ExecutionWholeArray.h>
|
|
|
|
namespace vtkm {
|
|
namespace worklet {
|
|
|
|
/// \brief Compute the tetrahedralize cells for an explicit grid data set
|
|
template <typename DeviceAdapter>
|
|
class TetrahedralizeFilterExplicitGrid
|
|
{
|
|
public:
|
|
|
|
//
|
|
// Worklet to count the number of triangles generated per cell
|
|
//
|
|
class TrianglesPerCell : public vtkm::worklet::WorkletMapField
|
|
{
|
|
public:
|
|
typedef void ControlSignature(FieldIn<> shapes,
|
|
FieldIn<> numIndices,
|
|
FieldOut<> triangleCount);
|
|
typedef void ExecutionSignature(_1,_2,_3);
|
|
typedef _1 InputDomain;
|
|
|
|
VTKM_CONT_EXPORT
|
|
TrianglesPerCell() {}
|
|
|
|
VTKM_EXEC_EXPORT
|
|
void operator()(const vtkm::UInt8 &shape,
|
|
const vtkm::IdComponent &numIndices,
|
|
vtkm::Id &triangleCount) const
|
|
{
|
|
if (shape == vtkm::CELL_SHAPE_TRIANGLE)
|
|
triangleCount = 1;
|
|
else if (shape == vtkm::CELL_SHAPE_QUAD)
|
|
triangleCount = 2;
|
|
else if (shape == vtkm::CELL_SHAPE_POLYGON)
|
|
triangleCount = numIndices - 2;
|
|
else triangleCount = 0;
|
|
}
|
|
};
|
|
|
|
//
|
|
// Worklet to count the number of tetrahedra generated per cell
|
|
//
|
|
class TetrahedraPerCell : public vtkm::worklet::WorkletMapField
|
|
{
|
|
public:
|
|
typedef void ControlSignature(FieldIn<> shapes,
|
|
FieldOut<> triangleCount);
|
|
typedef void ExecutionSignature(_1,_2);
|
|
typedef _1 InputDomain;
|
|
|
|
VTKM_CONT_EXPORT
|
|
TetrahedraPerCell() {}
|
|
|
|
VTKM_EXEC_EXPORT
|
|
void operator()(const vtkm::UInt8 &shape,
|
|
vtkm::Id &tetrahedraCount) const
|
|
{
|
|
if (shape == vtkm::CELL_SHAPE_TETRA)
|
|
tetrahedraCount = 1;
|
|
else if (shape == vtkm::CELL_SHAPE_HEXAHEDRON)
|
|
tetrahedraCount = 5;
|
|
else if (shape == vtkm::CELL_SHAPE_WEDGE)
|
|
tetrahedraCount = 3;
|
|
else if (shape == vtkm::CELL_SHAPE_PYRAMID)
|
|
tetrahedraCount = 2;
|
|
else tetrahedraCount = 0;
|
|
}
|
|
};
|
|
|
|
//
|
|
// Worklet to turn cells into triangles
|
|
// Vertices remain the same and each cell is processed with needing topology
|
|
//
|
|
class TriangulateCell : public vtkm::worklet::WorkletMapTopologyPointToCell
|
|
{
|
|
public:
|
|
typedef void ControlSignature(FieldInTo<> triangleOffset,
|
|
FieldInTo<> numIndices,
|
|
TopologyIn topology,
|
|
ExecObject connectivity);
|
|
typedef void ExecutionSignature(_1,_2,_4, CellShape, FromIndices);
|
|
typedef _3 InputDomain;
|
|
|
|
VTKM_CONT_EXPORT
|
|
TriangulateCell() {}
|
|
|
|
// Each cell produces triangles and write result at the offset
|
|
template<typename CellShapeTag, typename CellNodeVecType>
|
|
VTKM_EXEC_EXPORT
|
|
void operator()(const vtkm::Id &offset,
|
|
const vtkm::Id &numIndices,
|
|
vtkm::exec::ExecutionWholeArray<vtkm::Id> &connectivity,
|
|
CellShapeTag shape,
|
|
const CellNodeVecType &cellNodeIds) const
|
|
{
|
|
// Offset is in triangles, 3 vertices per triangle needed
|
|
vtkm::Id startIndex = offset * 3;
|
|
if (shape.Id == vtkm::CELL_SHAPE_TRIANGLE)
|
|
{
|
|
connectivity.Set(startIndex++, cellNodeIds[0]);
|
|
connectivity.Set(startIndex++, cellNodeIds[1]);
|
|
connectivity.Set(startIndex++, cellNodeIds[2]);
|
|
}
|
|
else if (shape.Id == vtkm::CELL_SHAPE_QUAD)
|
|
{
|
|
connectivity.Set(startIndex++, cellNodeIds[0]);
|
|
connectivity.Set(startIndex++, cellNodeIds[1]);
|
|
connectivity.Set(startIndex++, cellNodeIds[2]);
|
|
|
|
connectivity.Set(startIndex++, cellNodeIds[0]);
|
|
connectivity.Set(startIndex++, cellNodeIds[2]);
|
|
connectivity.Set(startIndex++, cellNodeIds[3]);
|
|
}
|
|
else if (shape.Id == vtkm::CELL_SHAPE_POLYGON)
|
|
{
|
|
for (vtkm::IdComponent tri = 0; tri < numIndices-2; tri++)
|
|
{
|
|
connectivity.Set(startIndex++, cellNodeIds[0]);
|
|
connectivity.Set(startIndex++, cellNodeIds[tri+1]);
|
|
connectivity.Set(startIndex++, cellNodeIds[tri+2]);
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
//
|
|
// Worklet to turn cells into tetrahedra
|
|
// Vertices remain the same and each cell is processed with needing topology
|
|
//
|
|
class TetrahedralizeCell : public vtkm::worklet::WorkletMapTopologyPointToCell
|
|
{
|
|
public:
|
|
typedef void ControlSignature(FieldInTo<> tetraOffset,
|
|
TopologyIn topology,
|
|
ExecObject connectivity);
|
|
typedef void ExecutionSignature(_1,_3, CellShape, FromIndices);
|
|
typedef _2 InputDomain;
|
|
|
|
VTKM_CONT_EXPORT
|
|
TetrahedralizeCell() {}
|
|
|
|
// Each cell produces tetrahedra and write result at the offset
|
|
template<typename CellShapeTag, typename CellNodeVecType>
|
|
VTKM_EXEC_EXPORT
|
|
void operator()(const vtkm::Id &offset,
|
|
vtkm::exec::ExecutionWholeArray<vtkm::Id> &connectivity,
|
|
CellShapeTag shape,
|
|
const CellNodeVecType &cellNodeIds) const
|
|
{
|
|
// Offset is in tetrahedra, 4 vertices per tetrahedron needed
|
|
vtkm::Id startIndex = offset * 4;
|
|
if (shape.Id == vtkm::CELL_SHAPE_TETRA)
|
|
{
|
|
connectivity.Set(startIndex++, cellNodeIds[0]);
|
|
connectivity.Set(startIndex++, cellNodeIds[1]);
|
|
connectivity.Set(startIndex++, cellNodeIds[2]);
|
|
connectivity.Set(startIndex++, cellNodeIds[3]);
|
|
}
|
|
else if (shape.Id == vtkm::CELL_SHAPE_HEXAHEDRON)
|
|
{
|
|
connectivity.Set(startIndex++, cellNodeIds[0]);
|
|
connectivity.Set(startIndex++, cellNodeIds[1]);
|
|
connectivity.Set(startIndex++, cellNodeIds[3]);
|
|
connectivity.Set(startIndex++, cellNodeIds[4]);
|
|
|
|
connectivity.Set(startIndex++, cellNodeIds[1]);
|
|
connectivity.Set(startIndex++, cellNodeIds[4]);
|
|
connectivity.Set(startIndex++, cellNodeIds[5]);
|
|
connectivity.Set(startIndex++, cellNodeIds[6]);
|
|
|
|
connectivity.Set(startIndex++, cellNodeIds[1]);
|
|
connectivity.Set(startIndex++, cellNodeIds[4]);
|
|
connectivity.Set(startIndex++, cellNodeIds[6]);
|
|
connectivity.Set(startIndex++, cellNodeIds[3]);
|
|
|
|
connectivity.Set(startIndex++, cellNodeIds[1]);
|
|
connectivity.Set(startIndex++, cellNodeIds[3]);
|
|
connectivity.Set(startIndex++, cellNodeIds[6]);
|
|
connectivity.Set(startIndex++, cellNodeIds[2]);
|
|
|
|
connectivity.Set(startIndex++, cellNodeIds[3]);
|
|
connectivity.Set(startIndex++, cellNodeIds[6]);
|
|
connectivity.Set(startIndex++, cellNodeIds[7]);
|
|
connectivity.Set(startIndex++, cellNodeIds[4]);
|
|
}
|
|
else if (shape.Id == vtkm::CELL_SHAPE_WEDGE)
|
|
{
|
|
connectivity.Set(startIndex++, cellNodeIds[0]);
|
|
connectivity.Set(startIndex++, cellNodeIds[1]);
|
|
connectivity.Set(startIndex++, cellNodeIds[2]);
|
|
connectivity.Set(startIndex++, cellNodeIds[4]);
|
|
|
|
connectivity.Set(startIndex++, cellNodeIds[3]);
|
|
connectivity.Set(startIndex++, cellNodeIds[4]);
|
|
connectivity.Set(startIndex++, cellNodeIds[5]);
|
|
connectivity.Set(startIndex++, cellNodeIds[2]);
|
|
|
|
connectivity.Set(startIndex++, cellNodeIds[0]);
|
|
connectivity.Set(startIndex++, cellNodeIds[2]);
|
|
connectivity.Set(startIndex++, cellNodeIds[3]);
|
|
connectivity.Set(startIndex++, cellNodeIds[4]);
|
|
}
|
|
else if (shape.Id == vtkm::CELL_SHAPE_PYRAMID)
|
|
{
|
|
connectivity.Set(startIndex++, cellNodeIds[0]);
|
|
connectivity.Set(startIndex++, cellNodeIds[1]);
|
|
connectivity.Set(startIndex++, cellNodeIds[2]);
|
|
connectivity.Set(startIndex++, cellNodeIds[4]);
|
|
|
|
connectivity.Set(startIndex++, cellNodeIds[0]);
|
|
connectivity.Set(startIndex++, cellNodeIds[2]);
|
|
connectivity.Set(startIndex++, cellNodeIds[3]);
|
|
connectivity.Set(startIndex++, cellNodeIds[4]);
|
|
}
|
|
}
|
|
};
|
|
|
|
//
|
|
// Construct the filter to tetrahedralize explicit grid
|
|
//
|
|
TetrahedralizeFilterExplicitGrid(const vtkm::cont::DataSet &inDataSet,
|
|
vtkm::cont::DataSet &outDataSet) :
|
|
InDataSet(inDataSet),
|
|
OutDataSet(outDataSet)
|
|
{}
|
|
|
|
vtkm::cont::DataSet InDataSet; // input dataset with structured cell set
|
|
vtkm::cont::DataSet OutDataSet; // output dataset with explicit cell set
|
|
|
|
//
|
|
// Populate the output dataset with triangles or tetrahedra based on input explicit dataset
|
|
//
|
|
void Run()
|
|
{
|
|
typedef typename vtkm::cont::DeviceAdapterAlgorithm<DeviceAdapter> DeviceAlgorithms;
|
|
|
|
// Cell sets belonging to input and output datasets
|
|
vtkm::cont::CellSetExplicit<> &inCellSet =
|
|
InDataSet.GetCellSet(0).template CastTo<vtkm::cont::CellSetExplicit<> >();
|
|
vtkm::cont::CellSetSingleType<> &cellSet =
|
|
OutDataSet.GetCellSet(0).template CastTo<vtkm::cont::CellSetSingleType<> >();
|
|
|
|
// Input dataset vertices and cell counts
|
|
vtkm::Id dimensionality = inCellSet.GetDimensionality();
|
|
|
|
// Input topology
|
|
vtkm::cont::ArrayHandle<vtkm::UInt8> inShapes = inCellSet.GetShapesArray(
|
|
vtkm::TopologyElementTagPoint(), vtkm::TopologyElementTagCell());
|
|
vtkm::cont::ArrayHandle<vtkm::IdComponent> inNumIndices = inCellSet.GetNumIndicesArray(
|
|
vtkm::TopologyElementTagPoint(), vtkm::TopologyElementTagCell());
|
|
vtkm::cont::ArrayHandle<vtkm::Id> inConn = inCellSet.GetConnectivityArray(
|
|
vtkm::TopologyElementTagPoint(), vtkm::TopologyElementTagCell());
|
|
|
|
// Determine the number of output cells each input cell will generate
|
|
vtkm::cont::ArrayHandle<vtkm::Id> numOutCellArray;
|
|
vtkm::IdComponent verticesPerOutCell = 0;
|
|
|
|
if (dimensionality == 2)
|
|
{
|
|
verticesPerOutCell = 3;
|
|
vtkm::worklet::DispatcherMapField<TrianglesPerCell> trianglesPerCellDispatcher;
|
|
trianglesPerCellDispatcher.Invoke(inShapes, inNumIndices, numOutCellArray);
|
|
}
|
|
else if (dimensionality == 3)
|
|
{
|
|
verticesPerOutCell = 4;
|
|
vtkm::worklet::DispatcherMapField<TetrahedraPerCell> tetrahedraPerCellDispatcher;
|
|
tetrahedraPerCellDispatcher.Invoke(inShapes, numOutCellArray);
|
|
}
|
|
|
|
// Number of output cells and number of vertices needed
|
|
vtkm::cont::ArrayHandle<vtkm::Id> cellOffset;
|
|
vtkm::Id numberOfOutCells = DeviceAlgorithms::ScanExclusive(numOutCellArray,
|
|
cellOffset);
|
|
vtkm::Id numberOfOutIndices = numberOfOutCells * verticesPerOutCell;
|
|
|
|
// Information needed to build the output cell set
|
|
vtkm::cont::ArrayHandle<vtkm::Id> connectivity;
|
|
connectivity.Allocate(numberOfOutIndices);
|
|
|
|
// Call worklet to compute the connectivity
|
|
if (dimensionality == 2)
|
|
{
|
|
vtkm::worklet::DispatcherMapTopology<TriangulateCell> triangulateCellDispatcher;
|
|
triangulateCellDispatcher.Invoke(
|
|
cellOffset,
|
|
inNumIndices,
|
|
inCellSet,
|
|
vtkm::exec::ExecutionWholeArray<vtkm::Id>(connectivity, numberOfOutIndices));
|
|
}
|
|
else if (dimensionality == 3)
|
|
{
|
|
vtkm::worklet::DispatcherMapTopology<TetrahedralizeCell> tetrahedralizeCellDispatcher;
|
|
tetrahedralizeCellDispatcher.Invoke(
|
|
cellOffset,
|
|
inCellSet,
|
|
vtkm::exec::ExecutionWholeArray<vtkm::Id>(connectivity, numberOfOutIndices));
|
|
}
|
|
// Add cells to output cellset
|
|
cellSet.Fill(connectivity);
|
|
}
|
|
};
|
|
|
|
}
|
|
} // namespace vtkm::worklet
|
|
|
|
#endif // vtk_m_worklet_TetrahedralizeExplicitGrid_h
|