feat(meshIO): added basic mesh reading implimentation

also added basic unit sphere mesh file which can be rescaled

src/meshIO/meson.build

@@ -0,0 +1,19 @@
+# Define the library
+meshIO_sources = files(
+  'private/meshIO.cpp',
+)
+
+meshIO_headers = files(
+    'public/meshIO.h'
+)
+
+# Define the libmeshIO library so it can be linked against by other parts of the build system
+libmeshIO = static_library('meshIO',
+    meshIO_sources, 
+    include_directories: include_directories('public'),
+    cpp_args: ['-fvisibility=default'],
+    dependencies: [mfem_dep],
+    install : true)
+
+# Make headers accessible
+install_headers(meshIO_headers, subdir : '4DSSE/meshIO')

src/meshIO/private/meshIO.cpp

@@ -0,0 +1,37 @@
+#include "mfem.hpp"
+#include <string>
+#include <iostream>
+#include <fstream>
+
+#include "meshIO.h"
+
+
+MeshIO::MeshIO(const std::string &mesh_file)
+{
+    mesh_file_ = mesh_file;
+    std::ifstream mesh_stream(mesh_file);
+    if (!mesh_stream)
+    {
+        throw std::runtime_error("Mesh file not found: " + mesh_file);
+        loaded_ = false;
+    }
+    else
+    {
+        mesh_ = mfem::Mesh(mesh_stream, 1, 2);
+        loaded_ = true;
+    }
+}
+
+MeshIO::~MeshIO()
+{
+}
+
+bool MeshIO::IsLoaded() const
+{
+    return loaded_;
+}
+
+mfem::Mesh& MeshIO::GetMesh()
+{
+    return mesh_;
+}

src/meshIO/public/meshIO.h

@@ -0,0 +1,42 @@
+#ifndef MESHIO_H
+#define MESHIO_H
+
+#include "mfem.hpp"
+#include <string>
+
+/**
+ * @brief Class for handling mesh input/output operations.
+ */
+class MeshIO
+{
+private:
+    bool loaded_; ///< Flag to indicate if the mesh is loaded
+    std::string mesh_file_; ///< Filename of the mesh file
+    mfem::Mesh mesh_; ///< The mesh object
+
+public:
+    /**
+     * @brief Constructor that initializes the MeshIO object with a mesh file.
+     * @param mesh_file The name of the mesh file.
+     */
+    MeshIO(const std::string &mesh_file);
+
+    /**
+     * @brief Destructor for the MeshIO class.
+     */
+    ~MeshIO();
+
+    /**
+     * @brief Get the mesh object.
+     * @return Reference to the mesh object.
+     */
+    mfem::Mesh& GetMesh();
+
+    /**
+     * @brief Check if the mesh is loaded.
+     * @return True if the mesh is loaded, false otherwise.
+     */
+    bool IsLoaded() const;
+};
+
+#endif // MESHIO_H

src/meson.build

@@ -4,4 +4,5 @@ subdir('resources')
 # Build the main source code
 subdir('dobj')
 subdir('const')
-subdir('opatIO')
+subdir('opatIO')
+subdir('meshIO')