SectRegion.h

// -*-c++-*-
//----------------------------------------------------------------------------
//  XC program; finite element analysis code
//  for structural analysis and design.
//
//  Copyright (C)  Luis C. Pérez Tato
//
//  This program derives from OpenSees <http://opensees.berkeley.edu>
//  developed by the  «Pacific earthquake engineering research center».
//
//  Except for the restrictions that may arise from the copyright
//  of the original program (see copyright_opensees.txt)
//  XC is free software: you can redistribute it and/or modify
//  it under the terms of the GNU General Public License as published by
//  the Free Software Foundation, either version 3 of the License, or 
//  (at your option) any later version.
//
//  This software is distributed in the hope that it will be useful, but 
//  WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU General Public License for more details. 
//
//
// You should have received a copy of the GNU General Public License 
// along with this program.
// If not, see <http://www.gnu.org/licenses/>.
//----------------------------------------------------------------------------
//SectRegion.h
// Written by Remo M. de Souza
// December 1998

#ifndef SectRegion_h 
#define SectRegion_h 


#include <iostream>
#include "material/section/repres/DiscretBase.h" 
#include <material/section/repres/cell/VectorCells.h>

class Polygon2d;
class HalfPlane2d;
class Pos2d;

namespace XC {
class Cell;
class VectorCells;
class Vector;
class Matrix;
class PolygonSectRegion;

//
//
class SectRegion: public DiscretBase
  {
  protected:
    mutable VectorCells cells;

  public:
    SectRegion(Material *);
    virtual ~SectRegion(void) {}

    // inquiring functions
    virtual int getNumCells(void) const= 0;
    virtual const VectorCells &getCells(void) const= 0;
    virtual SectRegion *getCopy(void) const= 0;

    virtual Polygon2d getPolygon(void) const;
    PolygonSectRegion Intersection(const HalfPlane2d &sp) const;
    const Vector &getCenterOfMass(void) const;
    double getLength(void) const;
    double getArea(void) const;
    double Iy(void) const;
    double Iz(void) const;
    double Pyz(void) const;
    double Ix(void) const;
    double Theta_p(void) const;
    const Vector &IAxisDir_a(void) const;
    const Vector &IAxisDir_b(void) const;
    double getI1(void) const;
    double getI2(void) const;
    double getI(const unsigned short int &i,const unsigned short int &j) const;
    double getI(const unsigned short int i,const unsigned short int j,const Pos2d &o) const;
    double getI(const Pos2d &O,const Vector &e) const;
    double getIO(const Pos2d &o);
    Matrix &getI(void) const;
    Matrix &getI(const Pos2d &o) const;



    virtual void Print(std::ostream &s, int flag= 0) const =0;   
    friend std::ostream &operator<<(std::ostream &, const SectRegion &);
  };
 
std::ostream &operator<<(std::ostream &, const SectRegion &);
} // end of XC namespace


#endif