Topology.h

/**
 * @file
 *  This file is part of PUML
 *
 *  For conditions of distribution and use, please see the copyright
 *  notice in the file 'COPYING' at the root directory of this package
 *  and the copyright notice at https://github.com/TUM-I5/PUMGen
 *
 * @copyright 2017 Technische Universitaet Muenchen
 * @author Sebastian Rettenberger <sebastian.rettenberger@tum.de>
 */

#ifndef PUML_TOPOLOGY_H
#define PUML_TOPOLOGY_H

namespace PUML
{

/**
 * The topology types
 */
enum TopoType {
	TETRAHEDRON,
	HEXAHEDRON
};

namespace internal
{

/**
 * Class describing the different topologies
 */
template<TopoType>
class Topology
{
public:
	/**
	 * @return The number of vertices of a cell
	 */
	static constexpr unsigned int cellvertices();

	/**
	 * @return The number of faces of a cell
	 */
	static constexpr unsigned int cellfaces();

	/**
	 * @return The number of edges for a cell
	 */
	static constexpr unsigned int celledges();

	/**
	 * @return The number of edges for a face
	 */
	static constexpr unsigned int faceedges()
	{ return facevertices(); /* This is always the same */ }

	/**
	 * @return The number vertices for a face
	 */
	static constexpr unsigned int facevertices();
};

template<> inline
constexpr unsigned int Topology<TETRAHEDRON>::cellvertices()
{ return 4; }

template<> inline
constexpr unsigned int Topology<HEXAHEDRON>::cellvertices()
{ return 8; }

template<> inline
constexpr unsigned int Topology<TETRAHEDRON>::cellfaces()
{ return 4; }

template<> inline
constexpr unsigned int Topology<HEXAHEDRON>::cellfaces()
{ return 6; }

template<> inline
constexpr unsigned int Topology<TETRAHEDRON>::celledges()
{ return 6; }

template<> inline
constexpr unsigned int Topology<HEXAHEDRON>::celledges()
{ return 12; }

template<> inline
constexpr unsigned int Topology<TETRAHEDRON>::facevertices()
{ return 3; }

template<> inline
constexpr unsigned int Topology<HEXAHEDRON>::facevertices()
{ return 4; }

}

}

#endif // PUML_TOPOLOGY_H