FEApp_LinearElement.hpp

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// $Id: FEApp_LinearElement.hpp,v 1.1 2007/05/08 21:37:17 etphipp Exp $ 
// $Source: /space/CVS/Trilinos/packages/sacado/example/FEApp/FEApp_LinearElement.hpp,v $ 
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// ***********************************************************************
// 
//                           Sacado Package
//                 Copyright (2006) Sandia Corporation
// 
// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
// 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
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//  
// This library is distributed in the hope that it will be useful, but
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
//  
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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// Questions? Contact David M. Gay (dmgay@sandia.gov) or Eric T. Phipps
// (etphipp@sandia.gov).
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#ifndef FEAPP_LINEARELEMENT_HPP
#define FEAPP_LINEARELEMENT_HPP

#include "FEApp_AbstractElement.hpp"

namespace FEApp {

  class LinearElement : public FEApp::AbstractElement {
  public:
    
    LinearElement();

    virtual ~LinearElement();

    virtual unsigned int numNodes() const;

    virtual void createNodes(double x_left, double x_right,
           unsigned int first_node_gid);

    virtual unsigned int nodeGID(unsigned int i) const;
  
    virtual void 
    evaluateShapes(const std::vector<double>& xi,
       std::vector< std::vector<double> >& phi) const;

    virtual void
    evaluateShapeDerivs(const std::vector<double>& xi,
      std::vector< std::vector<double> >& dphidxi) const;

    /*
     * \brief Evaluate Jacobian of element transformation at a set of 
     * points in (-1,1)
     */
    virtual void 
    evaluateJacobian(const std::vector<double>& xi,
         std::vector<double>& jac) const;

  private:

    LinearElement(const LinearElement&);

    LinearElement& operator=(const LinearElement&);

  protected:

    double xl;

    double xr;

    unsigned int left_GID;

    unsigned int right_GID;

  };

}

#endif // FEAPP_LINEARELEMENT_HPP

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