MeshSurfaceExtraction.h

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// SPDX-FileCopyrightText: Copyright (c) OpenGeoSys Community (opengeosys.org)
// SPDX-License-Identifier: BSD-3-Clause
 
#pragma once
 
#include <Eigen/Core>
#include <cstddef>
#include <vector>
 
#include "MeshLib/Mesh.h"
#include "MeshLib/Properties.h"
 
namespace MeshLib
{
// forward declarations
class Mesh;
class Element;
class Node;
}  // namespace MeshLib
 
namespace MeshToolsLib
{
class MeshSurfaceExtraction
{
public:
    static std::vector<double> getSurfaceAreaForNodes(
        const MeshLib::Mesh& mesh);

    static std::vector<MeshLib::Node*> getSurfaceNodes(
        const MeshLib::Mesh& mesh, Eigen::Vector3d const& dir, double angle);

    static MeshLib::Mesh* getMeshSurface(
        const MeshLib::Mesh& subsfc_mesh,
        Eigen::Vector3d const& dir,
        double angle,
        std::string_view subsfc_node_id_prop_name = "",
        std::string_view subsfc_element_id_prop_name = "",
        std::string_view face_id_prop_name = "");
 
private:
    static void get2DSurfaceElements(
        const std::vector<MeshLib::Element*>& all_elements,
        std::vector<MeshLib::Element*>& sfc_elements,
        std::vector<std::size_t>& element_to_bulk_element_id_map,
        std::vector<std::size_t>& element_to_bulk_face_id_map,
        Eigen::Vector3d const& dir,
        double angle,
        unsigned mesh_dimension);
};
 
namespace BoundaryExtraction
{
std::unique_ptr<MeshLib::Mesh> getBoundaryElementsAsMesh(
    MeshLib::Mesh const& bulk_mesh,
    std::string_view subsfc_node_id_prop_name,
    std::string_view subsfc_element_id_prop_name,
    std::string_view face_id_prop_name);
}
 
void addBulkIDPropertiesToMesh(
    MeshLib::Mesh& surface_mesh,
    std::string_view node_to_bulk_node_id_map_name,
    std::vector<std::size_t> const& node_to_bulk_node_id_map,
    std::string_view element_to_bulk_element_id_map_name,
    std::vector<std::size_t> const& element_to_bulk_element_id_map,
    std::string_view element_to_bulk_face_id_map_name,
    std::vector<std::size_t> const& element_to_bulk_face_id_map);
 
}  // namespace MeshToolsLib