DataSetMeshTriangulation3DMarchingCubes.h

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//  PURPOSE.  See the above copyright notice for more information.
//============================================================================
// Copyright (c) 2018, The Regents of the University of California, through
// Lawrence Berkeley National Laboratory (subject to receipt of any required approvals
// from the U.S. Dept. of Energy).  All rights reserved.
//
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//     Laboratory, U.S. Dept. of Energy nor the names of its contributors may be
//     used to endorse or promote products derived from this software without
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//=============================================================================
//
//  This code is an extension of the algorithm presented in the paper:
//  Parallel Peak Pruning for Scalable SMP Contour Tree Computation.
//  Hamish Carr, Gunther Weber, Christopher Sewell, and James Ahrens.
//  Proceedings of the IEEE Symposium on Large Data Analysis and Visualization
//  (LDAV), October 2016, Baltimore, Maryland.
//
//  The PPP2 algorithm and software were jointly developed by
//  Hamish Carr (University of Leeds), Gunther H. Weber (LBNL), and
//  Oliver Ruebel (LBNL)
//==============================================================================
 
 
#ifndef vtk_m_worklet_contourtree_augmented_data_set_mesh_triangulation_3d_marchingcubes_h
#define vtk_m_worklet_contourtree_augmented_data_set_mesh_triangulation_3d_marchingcubes_h
 
#include <cstdlib>
 
#include <vtkm/filter/scalar_topology/worklet/contourtree_augmented/DataSetMesh.h>
#include <vtkm/filter/scalar_topology/worklet/contourtree_augmented/meshtypes/MeshStructureMarchingCubes.h>
#include <vtkm/filter/scalar_topology/worklet/contourtree_augmented/meshtypes/marchingcubes_3D/Types.h>
#include <vtkm/filter/scalar_topology/worklet/contourtree_augmented/meshtypes/mesh_boundary/ComputeMeshBoundary3D.h>
#include <vtkm/filter/scalar_topology/worklet/contourtree_augmented/meshtypes/mesh_boundary/MeshBoundary3D.h>
 
namespace vtkm
{
namespace worklet
{
namespace contourtree_augmented
{
 
class DataSetMeshTriangulation3DMarchingCubes
  : public DataSetMesh
  , public vtkm::cont::ExecutionObjectBase
{ // class DataSetMeshTriangulation3DMarchingCubes
public:
  //Constants and case tables
 
  m3d_marchingcubes::EdgeBoundaryDetectionMasksType EdgeBoundaryDetectionMasks;
  m3d_marchingcubes::CubeVertexPermutationsType CubeVertexPermutations;
  m3d_marchingcubes::LinkVertexConnectionsType LinkVertexConnectionsSix;
  m3d_marchingcubes::LinkVertexConnectionsType LinkVertexConnectionsEighteen;
  m3d_marchingcubes::InCubeConnectionsType InCubeConnectionsSix;
  m3d_marchingcubes::InCubeConnectionsType InCubeConnectionsEighteen;
  static constexpr int MAX_OUTDEGREE = 6; // True for Freudenthal and Marching Cubes
 
  // mesh depended helper functions
  void SetPrepareForExecutionBehavior(bool getMax);
 
  MeshStructureMarchingCubes PrepareForExecution(vtkm::cont::DeviceAdapterId device,
                                                 vtkm::cont::Token& token) const;
 
  DataSetMeshTriangulation3DMarchingCubes(vtkm::Id3 meshSize);
 
  MeshBoundary3DExec GetMeshBoundaryExecutionObject() const;
 
  void GetBoundaryVertices(
    IdArrayType& boundaryVertexArray,    // output
    IdArrayType& boundarySortIndexArray, // output
    MeshBoundary3DExec* meshBoundaryExecObj =
      nullptr // optional input, included for consistency with ContourTreeMesh
  ) const;
 
  void GetOwnedVerticesByGlobalId(
    const vtkm::worklet::contourtree_augmented::mesh_dem::IdRelabeler& localToGlobalIdRelabeler,
    IdArrayType& ownedVertices) const;
 
private:
  bool UseGetMax; // Define the behavior ofr the PrepareForExecution function
};                // class DataSetMesh_Triangulation
 
// creates input mesh
inline DataSetMeshTriangulation3DMarchingCubes::DataSetMeshTriangulation3DMarchingCubes(
  vtkm::Id3 meshSize)
  : DataSetMesh(meshSize)
 
{
  // Initialize the case tables in vtkm
  this->EdgeBoundaryDetectionMasks =
    vtkm::cont::make_ArrayHandle(m3d_marchingcubes::EdgeBoundaryDetectionMasks,
                                 m3d_marchingcubes::N_ALL_NEIGHBOURS,
                                 vtkm::CopyFlag::Off);
  this->CubeVertexPermutations = vtkm::cont::make_ArrayHandleGroupVec<
    m3d_marchingcubes::
      CubeVertexPermutations_PermVecLength>( // create 2D array of vectors of lenghts ...PermVecLength
    vtkm::cont::make_ArrayHandle(
      m3d_marchingcubes::CubeVertexPermutations, // the array to convert
      m3d_marchingcubes::CubeVertexPermutations_NumPermutations *
        m3d_marchingcubes::CubeVertexPermutations_PermVecLength, // total number of elements
      vtkm::CopyFlag::Off));
  this->LinkVertexConnectionsSix = vtkm::cont::make_ArrayHandleGroupVec<
    m3d_marchingcubes::
      VertexConnections_VecLength>( // create 2D array of vectors o lenght ...VecLength
    vtkm::cont::make_ArrayHandle(
      m3d_marchingcubes::LinkVertexConnectionsSix, // the array to convert
      m3d_marchingcubes::LinkVertexConnectionsSix_NumPairs *
        m3d_marchingcubes::VertexConnections_VecLength, // total number of elements
      vtkm::CopyFlag::Off));
  this->LinkVertexConnectionsEighteen = vtkm::cont::make_ArrayHandleGroupVec<
    m3d_marchingcubes::
      VertexConnections_VecLength>( // create 2D array of vectors o lenght ...VecLength
    vtkm::cont::make_ArrayHandle(
      m3d_marchingcubes::LinkVertexConnectionsEighteen, // the array to convert
      m3d_marchingcubes::LinkVertexConnectionsEighteen_NumPairs *
        m3d_marchingcubes::VertexConnections_VecLength, // total number of elements
      vtkm::CopyFlag::Off));
  this->InCubeConnectionsSix =
    vtkm::cont::make_ArrayHandle(m3d_marchingcubes::InCubeConnectionsSix,
                                 m3d_marchingcubes::InCubeConnectionsSix_NumElements,
                                 vtkm::CopyFlag::Off);
  this->InCubeConnectionsEighteen =
    vtkm::cont::make_ArrayHandle(m3d_marchingcubes::InCubeConnectionsEighteen,
                                 m3d_marchingcubes::InCubeConnectionsEighteen_NumElements,
                                 vtkm::CopyFlag::Off);
}
 
inline void DataSetMeshTriangulation3DMarchingCubes::SetPrepareForExecutionBehavior(bool getMax)
{
  this->UseGetMax = getMax;
}
 
// Get VTKM execution object that represents the structure of the mesh and provides the mesh helper functions on the device
inline MeshStructureMarchingCubes DataSetMeshTriangulation3DMarchingCubes::PrepareForExecution(
  vtkm::cont::DeviceAdapterId device,
  vtkm::cont::Token& token) const
{
  return MeshStructureMarchingCubes(this->MeshSize,
                                    this->UseGetMax,
                                    this->SortIndices,
                                    this->SortOrder,
                                    this->EdgeBoundaryDetectionMasks,
                                    this->CubeVertexPermutations,
                                    this->LinkVertexConnectionsSix,
                                    this->LinkVertexConnectionsEighteen,
                                    this->InCubeConnectionsSix,
                                    this->InCubeConnectionsEighteen,
                                    device,
                                    token);
}
 
inline MeshBoundary3DExec DataSetMeshTriangulation3DMarchingCubes::GetMeshBoundaryExecutionObject()
  const
{
  return MeshBoundary3DExec(this->MeshSize, this->SortOrder);
}
 
inline void DataSetMeshTriangulation3DMarchingCubes::GetBoundaryVertices(
  IdArrayType& boundaryVertexArray,       // output
  IdArrayType& boundarySortIndexArray,    // output
  MeshBoundary3DExec* meshBoundaryExecObj // input
) const
{
  vtkm::Id numBoundary = 2 * this->MeshSize[1] * this->MeshSize[0] // xy faces
    + 2 * this->MeshSize[1] * (this->MeshSize[2] - 2)        // yz faces - excluding vertices on xy
    + 2 * (this->MeshSize[0] - 2) * (this->MeshSize[2] - 2); // xz face interiors
  auto boundaryId = vtkm::cont::ArrayHandleIndex(numBoundary);
  ComputeMeshBoundary3D computeMeshBoundary3dWorklet;
  vtkm::cont::Invoker invoke;
  invoke(computeMeshBoundary3dWorklet,
         boundaryId,        // input
         this->SortIndices, // input
         (meshBoundaryExecObj == NULL) ? this->GetMeshBoundaryExecutionObject()
                                       : *meshBoundaryExecObj, // input
         boundaryVertexArray,                                  // output
         boundarySortIndexArray                                // output
  );
}
 
// Overwrite the implemenation from the base DataSetMesh parent class
inline void DataSetMeshTriangulation3DMarchingCubes::GetOwnedVerticesByGlobalId(
  const vtkm::worklet::contourtree_augmented::mesh_dem::IdRelabeler& localToGlobalIdRelabeler,
  IdArrayType& ownedVertices) const
{
  return this->GetOwnedVerticesByGlobalIdImpl(this, localToGlobalIdRelabeler, ownedVertices);
}
 
} // namespace contourtree_augmented
} // worklet
} // vtkm
 
#endif