ObjExporter.MeshToFile C# (CSharp) Method

    public static void MeshToFile( MeshFilter mf, string directory, string filename )
    {
        if( !Directory.Exists( directory ) )
        {
            Directory.CreateDirectory( directory );
        }

        using( StreamWriter sw = new StreamWriter( directory + filename ) )
        {
            sw.Write( MeshToString( mf ) );
        }
    }

    void Awake()
    {
        // save the parent GO-s pos+rot
        Vector3    position = transform.position;
        Quaternion rotation = transform.rotation;

        // move to the origin for combining
        transform.position = Vector3.zero;
        transform.rotation = Quaternion.identity;

        MeshFilter[]           filters = GetComponentsInChildren <MeshFilter>();
        List <CombineInstance> combine = new List <CombineInstance>();

        for (int i = 0; i < filters.Length; i++)
        {
            // skip the empty parent GO
            if (filters[i].sharedMesh == null)
            {
                continue;
            }

            // combine submeshes
            for (int j = 0; j < filters[i].sharedMesh.subMeshCount; j++)
            {
                CombineInstance ci = new CombineInstance();

                ci.mesh         = filters[i].sharedMesh;
                ci.subMeshIndex = j;
                ci.transform    = filters[i].transform.localToWorldMatrix;

                combine.Add(ci);
            }

            // disable child mesh GO-s
            filters[i].gameObject.SetActive(false);
        }

        MeshFilter filter = GetComponent <MeshFilter>();

        filter.mesh = new Mesh();
        filter.mesh.CombineMeshes(combine.ToArray(), true, true);

        // restore the parent GO-s pos+rot
        transform.position = position;
        transform.rotation = rotation;

        ObjExporter.MeshToFile(filter, Application.persistentDataPath + "testobj.obj");



        Mesh        holderMesh = new Mesh();
        ObjImporter newMesh    = new ObjImporter();

        holderMesh = newMesh.ImportFile(Application.persistentDataPath + "testobj.obj");

        MeshRenderer renderer = g1.GetComponent <MeshRenderer>();
        MeshFilter   filter1  = g1.GetComponent <MeshFilter>();

        filter1.mesh = holderMesh;
    }