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/*
#@HEADER
# ************************************************************************
#
#                          Moertel FE Package
#                 Copyright (2006) Sandia Corporation
#
# Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
# license for use of this work by or on behalf of the U.S. Government.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# 3. Neither the name of the Corporation nor the names of the
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SANDIA CORPORATION OR THE
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
# PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
# LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# Questions? Contact Glen Hansen (gahanse@sandia.gov)
#
# ************************************************************************
#@HEADER
*/
/* ******************************************************************** */
/* See the file COPYRIGHT for a complete copyright notice, contact      */
/* person and disclaimer.                                               */
/* ******************************************************************** */
/*!
 * \file mrtr_point.H
 *
 * \class MOERTEL::Point
 *
 * \brief A light weight node
 *
 * \date Last update do Doxygen: 20-March-06
 *
 */
#ifndef MOERTEL_POINT_H
#define MOERTEL_POINT_H

#include <ctime>
#include <iostream>
#include <iomanip>

#include "mrtr_node.H"

// ----------   User Defined Includes   ----------

/*!
\brief MOERTEL: namespace of the Moertel package

The Moertel package depends on \ref Epetra, \ref EpetraExt, \ref Teuchos,
\ref Amesos, \ref ML and \ref AztecOO:<br>
Use at least the following lines in the configure of Trilinos:<br>
\code
--enable-moertel 
--enable-epetra 
--enable-epetraext
--enable-teuchos 
--enable-ml
--enable-aztecoo --enable-aztecoo-teuchos 
--enable-amesos
\endcode

*/
namespace MOERTEL
{


/*!
\class Point

\brief <b> A light weight version of a node </b>

This class defines a point on a segment. It is a light weight version of a node.
It is used in the integration of 2D interfaces where the mortar side is imprinted
to the slave side. The overlap between a mortar and a slave segment leads to
a polygon defined by points on the slave segment. The polygon is then
discretized by triangle finite elements (eventually adding more points) to perform
the integration on the polygon region. A point might therefore become a node
of the polygon discretization and therefore has capabilities to store a Node class.

The \ref MOERTEL::Point class supports the ostream& operator <<

\author Glen Hansen (gahanse@sandia.gov)

*/
class Point
{
public:

  // @{ \name Constructors and destructors

  /*!
  \brief Constructor
  
  Constructs an instance of this class.<br>
  Note that this is \b not a collective call as points shall only have one owning process.
  
  \param id : A unique positive point id.
  \param xi : Coordinates of point in a segment (2D)
  \param out : Level of output information written to stdout ( 0 - 10 )
  */
  Point(const int id, const double* xi, int out);
  
  /*!
  \brief Destructor
  */
  virtual ~Point();
  
  //@}
  // @{ \name Public members

  /*!
  \brief Return the level of output written to stdout ( 0 - 10 )
  
  */
  int OutLevel() { return outputlevel_; }
  
  /*!
  \brief Print this node to stdout
  
  */
  void Print() const;

  /*!
  \brief Return id of this point
  
  */
  inline int Id() { return id_; }
  
  /*!
  \brief Return view of segment local coordinates of this point (2D)
  
  */
  inline const double* Xi() { return &xi_[0]; }

  /*!
  \brief Return view of global coordinates of this point (3D)
  
  If this point holds a Node it will return a pointer to the
  global 3D coordinates of that Node. If it does not hold a Node, it will
  return NULL
  
  */
  inline const double* X() { if (node_ != Teuchos::null) return node_->X(); else return NULL; }

  /*!
  \brief Return view of Node
  
  If this point holds a Node it will return a pointer to the Node.
  If it does not hold a Node, it will return Teuchos::null
  
  */
  inline Teuchos::RCP<MOERTEL::Node> Node() { return node_; }
  
  /*!
  \brief Set segment local coordinates of this point (2D) in a segment
  
  */
  bool SetXi(const double* xi) { xi_[0] = xi[0]; xi_[1] = xi[1]; return true; }

  /*!
  \brief Set a Node to this point
  
  The Point takes ownership of the Node and will destroy it 
  
  */
  bool SetNode(MOERTEL::Node* node) { node_ = Teuchos::rcp(node); return true; }

  /*!
  \brief Store finite element function values at the Point 's coordinate \ref Xi()
  
  \param place : Place in internal data structure where to store function values.<br>
  place=0 is used to store trace space function values of the slave segment.<br>
  place=1 is used to store Lagrange multiplier space function values of the slave segment.<br>
  place=2 is used to store trace space function values of the master segment.<br>
  \param val : Vector of length valdim holding function values
  \param valdim : Dimension of val
  
  */
  void StoreFunctionValues(int place, double* val, int valdim);

  /*!
  \brief Return view of function values stored in this Point
  
  Returns a view of the function values that were stored in this Point using \ref StoreFunctionValues
  
  */
  std::vector<double>* FunctionValues() { return vals_; }

  //@}


private:

  // don't want = operator
  Point operator = (const Point& old);
  // don't want copy-ctor
  Point(MOERTEL::Point& old);

private:

  int                      id_;      // id of this point
  int                      outputlevel_; 
  double                   xi_[2];   // local coords in some slave elements coord system
  Teuchos::RCP<MOERTEL::Node>  node_;    // a node at this point (contains real world coords)
  std::vector<double>           vals_[3]; // [0] values of shape function 0 from sseg
                                     // [1] values of shape function 1 from sseg
                                     // [2] values of shape function 0 from mseg
}; // class Point


} // namespace MOERTEL

// << operator
std::ostream& operator << (std::ostream& os, const MOERTEL::Point& point);


#endif // MOERTEL_POINT_H