VtkMeshInterface.hpp

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// _LICENSE_HEADER_
//
// Copyright (C) 2019 - 2025.
// Terms register on the GPL-3.0 license.
//
// This file can be redistributed and/or modified under the license terms.
//
// See top level LICENSE file for more details.
//
// This file can be used citing references in CITATION.cff file.
 
#ifndef __VtkMeshInterface_H
#define __VtkMeshInterface_H
 
#include "IMeshDAO.hpp"
#include "MeshUtilities.hpp"
 
namespace Gedim
{
class VtkMeshInterface final
{
  public:
    struct VtkMesh final
    {
        struct Cell3D final
        {
            enum struct Types
            {
                Unknown = 0,
                Tetrahedron = 1,
                Hexahedron = 2
            };
 
            std::vector<unsigned int> Cell0D_Id;
            Types Type;
        };
 
        unsigned int NumCell0Ds;
        unsigned int NumCell3Ds;
 
        Eigen::MatrixXd Cell0Ds;
        std::vector<Cell3D> Cell3Ds;
    };
 
    struct VtkMesh3D final
    {
        std::array<std::vector<unsigned int>, 4> Markers;
 
        Eigen::MatrixXd Cell0Ds;
        Eigen::MatrixXi Cell1Ds;
        std::vector<Eigen::MatrixXi> Cell2Ds;
        std::vector<Gedim::MeshUtilities::Mesh3DPolyhedron> Cell3Ds;
    };
 
  private:
    struct Mesh_Face final
    {
        Eigen::MatrixXi Extremes;
        unsigned int Index;
        unsigned int Marker;
    };
 
    unsigned int InsertNewEdge(const unsigned int origin,
                               const unsigned int end,
                               std::map<std::pair<unsigned int, unsigned int>, unsigned int> &edges) const;
    unsigned int InsertNewFace(const std::vector<unsigned int> &face_vertices,
                               const std::vector<unsigned int> &face_edges,
                               std::map<std::pair<unsigned int, unsigned int>, Mesh_Face> &faces) const;
    VtkMesh3D ComputeVtkMesh3D(VtkMesh &originalMesh) const;
 
  public:
    VtkMeshInterface();
    ~VtkMeshInterface();
 
    VtkMesh3D ImportMesh3DFromFile(const std::string &vtkFilePath) const;
};
} // namespace Gedim
 
#endif // __OpenVolumeMeshInterface_H