ReadRTT.hpp

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/**
 * MOAB, a Mesh-Oriented datABase, is a software component for creating,
 * storing and accessing finite element mesh data.
 *
 * Copyright 2004 Sandia Corporation. Under the terms of Contract
 * DE-AC04-94AL85000 with Sandia Coroporation, the U.S. Government
 * retains certain rights in this software.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 */
 
//-------------------------------------------------------------------------
// Filename : ReadRTT.hpp
//
// Purpose : RTT file reader
//
// Creator : Andrew Davis
//
// Date : 02/2014
//
//-------------------------------------------------------------------------
 
/**
 * The RTT file format is used by the Attila deterministic radiation
 * transport code. The specific mesh format can be found in Chapter 9
 * of the Attila manual. The format is defined by xml like, block/end block
 * type syntax. The implementation at the time of writing supports a subset
 * of the whole format, and even Attila does not support the entireity of
 * its own mesh format.
 *
 * The mesh contains several features, that as a whole allow the conversion
 * from the RTT format, to a DAGMC geometry and a Tet Mesh for tallying.
 *
 * Sides - Defines the 6 boundary condtions for top, bottom, front, back
 * left and right, as well as internal and external.
 *---------------------------------------------------------------------
 * Faces - Logically equivalent to surfaces in DAGMC, containers for triangles, includes
 * the definition of the sense of the faces with respect to the Cells (volumes)
 * which bound it.
 *
 * The face syntax looks like
 *
 * 1 (+)Pyrex@14
 *
 * This means Face (surface) 1 is used to define the insde of the Pyrex cell only
 *
 * 75 (+)Pyrex/(-)Fuel30@25
 *
 * This means Face (surface) 75 is used by both Cell Pyrex and Cell Fuel 30,
 * the + and - signs refer to the sense, i.e. the inside sense defines the Pyrex and
 * the outside sense defines the Fuel.
 *---------------------------------------------------------------------
 * Cells - Entityset like coillections of tetrahedra which define contiguous material properties
 *
 * cell_flags
 * 1 REGIONS
 * 1 Pyrex
 * end_cell_flags
 *
 * Defines that there is 1 region called Pyrex
 *---------------------------------------------------------------------
 * Nodes - Defines the vertices for facets and tets, the syntax of which is shown below
 *
 * 100 1.8900000000E+03 0.0000000000E+00 5.0000000000E+03 100
 *
 * Defines that this is node 100, and has the coordinates 1890.0, 0.0 5000.0 cm
 **---------------------------------------------------------------------
 * Side (element) - Triangles
 *
 * 1 3 874 132 154 3 6365
 *
 * Defines that this is side element 1, it has 3 nodes, 874, 132 and 154,
 * side ID 3 and surface number 6365
 *---------------------------------------------------------------------
 * Cells (element) - Tetrahedra
 *
 * 691 4 599 556 1218 1216 2
 *
 * Defines that this is tet 691, it has 4 connections to nodes 599, 556,
 * 1218, 1216 and belongs to cell number 2.
 *
 */
 
#ifndef READRTT_HPP
#define READRTT_HPP
 
#ifndef IS_BUILDING_MB
#error "ReadRTT.hpp isn't supposed to be included into an application"
#endif
 
#include <iostream>
#include <fstream>
#include <sstream>
#include <map>
#include <vector>
 
#include "moab/Interface.hpp"
#include "moab/ReaderIface.hpp"
#include "FileTokenizer.hpp"
#include "moab/RangeMap.hpp"
 
namespace moab
{
 
class ReadUtilIface;
class GeomTopoTool;
 
class ReadRTT : public ReaderIface
{
 
 public:
 // factory method
 static ReaderIface* factory( Interface* );
 
 // generic overloaded core -> load_file
 ErrorCode load_file( const char* file_name,
 const EntityHandle* file_set,
 const FileOptions& opts,
 const SubsetList* subset_list = 0,
 const Tag* file_id_tag = 0 );
 // constructor
 ReadRTT( Interface* impl = NULL );
 
 // destructor
 virtual ~ReadRTT();
 
 // implementation empty
 ErrorCode read_tag_values( const char* file_name,
 const char* tag_name,
 const FileOptions& opts,
 std::vector< int >& tag_values_out,
 const SubsetList* subset_list = 0 );
 
 protected:
 // private functions
 private:
 // structure to hold the header data
 struct headerData
 {
 std::string version;
 std::string title;
 std::string date;
 };
 
 // structure to hold sense & vol data
 struct boundary
 {
 int sense;
 std::string name;
 };
 
 // structure to hold side data
 struct side
 {
 int id;
 int senses[2];
 std::string names[2];
 side() : id( 0 )
 {
 senses[0] = senses[1] = 0;
 names[0] = names[1] = "";
 }
 };
 
 // structure to hold cell data
 struct cell
 {
 int id;
 std::string name;
 cell() : id( 0 ), name( "" ) {}
 };
 
 // structure to hold node data
 struct node
 {
 int id;
 double x, y, z;
 node() : id( 0 ), x( 0. ), y( 0. ), z( 0. ) {}
 };
 
 // structure to hold facet data
 struct facet
 {
 int id;
 int connectivity[3];
 int side_id;
 int surface_number;
 facet() : id( 0 ), side_id( 0 ), surface_number( 0 )
 {
 for( int k = 0; k < 3; k++ )
 connectivity[k] = 0;
 }
 };
 
 // structure to hold tet data
 struct tet
 {
 int id;
 int connectivity[4];
 int material_number;
 // with c++11 we could use tet(): id(0), connectivity({0}), material_number(0) {}
 tet() : id( 0 ), material_number( 0 )
 {
 for( int k = 0; k < 4; k++ )
 connectivity[k] = 0;
 }
 };
 
 /**
 * generates the topology of the problem from the already read input data, loops over the 2 and
 * 3 dimension macrodata that exist from the rtt file, sides = dagmc surfaces, cells = dagmc
 * cells, creates a meshset for each surface and tags with the id number, and similarly makes a
 * meshset for dagmc cells and tags with the id number. The surfaces are added to the s surface
 * map, where the key is the surface ID number (1->N) and (cells and surfaces are added to an
 * dimesional entity map stored in the class
 *
 * @param side_data, vector of side data
 * @param cell_data, vector of vector of cell data
 * @param surface_map, reference to the surface map of data
 *
 */
 ErrorCode generate_topology( std::vector< side > side_data,
 std::vector< cell > cell_data,
 std::map< int, EntityHandle >& surface_map );
 /**
 * Generate parent child links to create DAGMC like structure of surface meshsets being children
 * of parent cell meshsets. By looping over the surfaces (1->N), look in the description of the
 * cells that are shared by that surface, and then make the surface the child of the parent
 * volume. The appropriate sense data will be set later
 *
 * @param num_ents[4], array containing the number of surfaces, cells, groups etc
 * @param entity_map[4], vector of maps containing data by dimension
 * @param side_data, vector of all the side data in the problem
 * @param cell_data, vector of the cell data in the problem
 *
 */
 void generate_parent_child_links( int num_ents[4],
 std::vector< EntityHandle > entity_map[4],
 std::vector< side > side_data,
 std::vector< cell > cell_data );
 /**
 * Sets the appropriate surface senses for each surface in the problem. By looping through all
 * the surfaces, we determine from the side_data vector, the volume id's that are shared, then
 * using 1 to mean +ve sense and -1 to mean -ve sense wrt the volume.
 *
 * @param num_ents[4], array containing the number of surfaces, cells, groups etc
 * @param entity_map[4], vector of maps containing data by dimension
 * @param side_data, vector of all the side data in the problem
 * @param cell_data, vector of the cell data in the problem
 *
 */
 void set_surface_senses( int num_ents[4],
 std::vector< EntityHandle > entity_map[4],
 std::vector< side > side_data,
 std::vector< cell > cell_data );
 
 /**
 * creates the group data requried for dagmc, reflecting planes, material assignments etc
 * @param entity_map, vector of vector of entitiy handles for each dimension
 *
 * @returns moab::ErrorCode
 */
 ErrorCode setup_group_data( std::vector< EntityHandle > entity_map[4] );
 
 /**
 * create a group of a given name, mustkeep track of id
 * @param group_name, name of the group
 * @param id, integer id number
 *
 * returns the entity handle of the group
 */
 EntityHandle create_group( std::string group_name, int id );
 
 /**
 * Builds the full MOAB representation of the data, making vertices from coordinates, triangles
 * from vertices and tets from the same vertices. Tags appropriate to each dataset collection
 * are applied, triangles are tagged with the surface id and side id they belong to, as well as
 * tagging the surface with the same data. Tets are similarly tagged only with the Material
 * number
 *
 * @param node_data the node data
 * @param facet_data, the triangles in the problem
 * @param tet_data, the tets in the problem
 * @param surface_map, the map of surface meshset and id numbers
 *
 * @return moab::ErrorCode
 */
 ErrorCode build_moab( std::vector< node > node_data,
 std::vector< facet > facet_data,
 std::vector< tet > tet_data,
 std::map< int, EntityHandle > surface_map );
 
 /**
 * reads the full set of header data
 *
 * @param filename, the file to read the data from
 *
 * @return moab::Error code
 */
 ErrorCode read_header( const char* filename );
 
 /**
 * Reads the full set of side data from the file
 *
 * @param filename, the file to read all the side data from
 * @param side data, a vector containing all the read side data
 *
 * @return moab::ErrorCode
 */
 ErrorCode read_sides( const char* filename, std::vector< side >& side_data );
 
 /**
 * Reads the full set of cell data from the file
 *
 * @param filename, the file to read all the side data from
 * @param cell data, a vector containing all the read cell data
 *
 * @return moab::ErrorCode
 */
 ErrorCode read_cells( const char* filename, std::vector< cell >& cell_data );
 
 /**
 * Reads the full set of node data from the file
 *
 * @param filename, the file to read all the side data from
 * @param node data, a vector containing all the read node data
 *
 * @return moab::ErrorCode
 */
 ErrorCode read_nodes( const char* filename, std::vector< node >& node_data );
 
 /**
 * Reads the full set of facet data from the file
 *
 * @param filename, the file to read all the side data from
 * @param facet data, a vector containing all the read facet data
 *
 * @return moab::ErrorCode
 */
 ErrorCode read_facets( const char* filename, std::vector< facet >& facet_data );
 
 /**
 * Reads the full set of tet data from the file
 *
 * @param filename, the file to read all the side data from
 * @param tet data, a vector containing all the read tet data
 *
 * @return moab::ErrorCode
 */
 ErrorCode read_tets( const char* filename, std::vector< tet >& tet_data );
 
 /**
 * Reads the header data into a class member structure
 *
 * @param input_file, an open filestream
 *
 * @return void
 */
 ErrorCode get_header_data( std::ifstream& input_file );
 
 /**
 * Reads a single atomic cell data string and populates a cell struct
 *
 * @param celldata, a string of read data and
 *
 * @return cell, the propulated cell struct
 */
 cell get_cell_data( std::string celldata );
 
 /**
 * Reads a single atomic side data string and populates a side struct
 *
 * @param sidedata, a string of read data and
 *
 * @return side, the propulated side struct
 */
 side get_side_data( std::string sidedata );
 
 /**
 * Reads a single atomic node data string and populates a node struct
 *
 * @param sidedata, a string of read data and
 *
 * @return node, the propulated node struct
 */
 node get_node_data( std::string nodedata );
 
 /**
 * Reads a single atomic facet data string and populates a facet struct
 *
 * @param facetdata, a string of facet data and
 *
 * @return facet, the propulated facet struct
 */
 facet get_facet_data( std::string facetdata );
 
 /**
 * Reads a single atomic tet data string and populates a tet struct
 *
 * @param tetdata, a string of tet data and
 *
 * @return tet, the propulated tet struct
 */
 tet get_tet_data( std::string tetdata );
 
 /**
 * Splits a string into a vector of substrings delimited by split_char
 *
 * @param string_to_split, the string that needs splitting into chunks
 * @param split_char, the character to split the string with
 *
 * @return a vector of strings that are delimited by split_char
 */
 std::vector< std::string > split_string( std::string string_to_split, char split_char );
 
 /**
 * Splits an Attila cellname and populates a boundary structure
 *
 * @param attila_cellname, string containing the boundary information
 *
 * @return a boundary object
 */
 boundary split_name( std::string atilla_cellname );
 
 /**
 * Count the number of unique surface numbers in the dataset, also get list of surface numbers
 * @param side_data, collection of all the side data in the mesh
 * @param surface_numbers, collection of surface numbers
 *
 * returns the number of surface numbers
 */
 int count_sides( std::vector< side > side_data, std::vector< int >& surface_numbers );
 
 // Class Member variables
 private:
 headerData header_data;
 // read mesh interface
 ReadUtilIface* readMeshIface;
 // Moab Interface
 Interface* MBI;
 // geom tool instance
 GeomTopoTool* myGeomTool;
 // tags used in the problem
 Tag geom_tag, id_tag, name_tag, category_tag, faceting_tol_tag;
};
 
} // namespace moab
 
#endif