MeshInformation.h

/**
 * \file
 * \author Karsten Rink
 * \date   2013-10-28
 * \brief  Definition of the MeshInformation class
 *
 * \copyright
 * Copyright (c) 2012-2016, OpenGeoSys Community (http://www.opengeosys.org)
 *            Distributed under a Modified BSD License.
 *              See accompanying file LICENSE.txt or
 *              http://www.opengeosys.org/project/license
 *
 */

#ifndef MESHINFORMATION_H
#define MESHINFORMATION_H

#include <array>
#include <string>
#include <limits>

#include "GeoLib/AABB.h"
#include "MeshLib/Node.h"
#include "MeshLib/Properties.h"

namespace MeshLib
{
class Mesh;

/**
 * \brief A set of tools for extracting information from a mesh
 */
class MeshInformation
{
public:
	/// Returns the smallest and largest value of a scalar array with the given name.
	template<typename T>
	static std::pair<T, T> const
		getValueBounds(MeshLib::Mesh const& mesh, std::string const& name)
	{
		boost::optional<MeshLib::PropertyVector<T> const&> 
			data_vec (mesh.getProperties().getPropertyVector<T>(name));
		if (!data_vec)
			return {std::numeric_limits<T>::max(), std::numeric_limits<T>::max()};
		if (data_vec->empty()) {
			INFO("Mesh does not contain values for the property \"%s\".", name.c_str());
			return {std::numeric_limits<T>::max(), std::numeric_limits<T>::max()};
		}
		auto vec_bounds = std::minmax_element(data_vec->cbegin(), data_vec->cend());
		return {*(vec_bounds.first), *(vec_bounds.second)};
	}

	/// Returns the bounding box of the mesh.
	static const GeoLib::AABB getBoundingBox(const MeshLib::Mesh &mesh);

	/**
	 * Returns an array with the number of elements of each type in the given mesh.
	 * On completion, n_element_types array contains the number of elements of each of the seven
	 * supported types. The index to element type conversion is this:
	 *		0: \#lines
	 *		1: \#triangles
	 *		2: \#quads
	 *		3: \#tetrahedra
	 *		4: \#hexahedra
	 *		5: \#pyramids
	 *		6: \#prisms
	 */
	static const std::array<unsigned, 7> getNumberOfElementTypes(const MeshLib::Mesh &mesh);


};

}

#endif //MESHINFORMATION_H