Node.h

/**
 * Copyright (c) 2012, OpenGeoSys Community (http://www.opengeosys.com)
 *            Distributed under a Modified BSD License.
 *              See accompanying file LICENSE.txt or
 *              http://www.opengeosys.com/LICENSE.txt
 *
 *
 * \file Node.h
 *
 * Created on 2012-05-02 by Karsten Rink
 */

#ifndef NODE_H_
#define NODE_H_

#include <cstdlib>
#include <limits>
#include <vector>

#include "PointWithID.h"
#include "Mesh.h"

namespace MeshLib {

class Element;

/**
 * A mesh node with coordinates in 3D space.
 */
class Node : public GeoLib::PointWithID
{
	/* friend functions: */
	friend class Mesh;//void Mesh::setElementInformationForNodes();
	//friend void Mesh::addElement(Element*);


public:
	/// Constructor using a coordinate array
	Node(const double coords[3], unsigned id = std::numeric_limits<unsigned>::max());

	/// Constructor using single coordinates
	Node(double x, double y, double z, unsigned id = std::numeric_limits<unsigned>::max());

	/// Copy constructor
	Node(const Node &node);

	/// Get an element the node is part of.
	const Element* getElement(unsigned idx) const { return _elements[idx]; };

	/// Get all elements the node is part of.
	const std::vector<Element*> getElements() const { return _elements; };

	/// Get number of elements the node is part of.
	size_t getNElements() const { return _elements.size(); };

	/// Destructor
	virtual ~Node();

protected:
	/**
	 * Add an element the node is part of.
	 * This method is called by Mesh::addElement(Element*), see friend definition.
	 */
	void addElement(Element* elem) { _elements.push_back(elem); };

	std::vector<Element*> _elements;

}; /* class */

} /* namespace */

#endif /* NODE_H_ */