a_plucker.h

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/*
Copyright 2010-2011 Pierre SMARS (smars@yuntech.edu.tw)
This program 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 2 of the License, or
(at your option) any later version.
 
This program 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/>.
*/
#ifndef _A_PLUCKER_H_
#define _A_PLUCKER_H_
 
#include <iostream>
#include <sstream>
#include "a_point.h"
 
class a_plucker
{
public:
        a_plucker(); //v : value 
        a_plucker(double ax, double ay, double az, double bx, double by, double bz);
        a_plucker(a_point p1, a_point p2);
        a_plucker(const a_plucker& m);
        //~a_plucker() {std::cerr << "destroyed a_plucker" << std::endl;}
        ~a_plucker() {}
        virtual std::string name() const {return "a_plucker";}
 
        inline a_point p1() const {return p1_;}
        inline a_point p2() const {return p2_;}
        inline void p1(const a_point & p) {p1_=p;}
        inline void p2(const a_point & p) {p2_=p;}
 
        a_plucker& operator=(const a_plucker& m);
        bool operator==(const a_plucker& a);
        a_plucker& operator-();
        virtual a_plucker operator+(const a_plucker& a);
        a_plucker operator-(const a_plucker& a);
        a_plucker& operator+=(const a_plucker& a);
        a_plucker& operator-=(const a_plucker& a);
        a_plucker& operator*=(double v);
        a_plucker& operator/=(double v);
        bool operator==(const a_plucker& a) const;
        bool operator!=(const a_plucker& a) const;
 
        //: input/output
        virtual void read(std::istream &i);
        virtual void write(std::ostream &o) const;
 
protected:
        a_point         p1_;
        a_point         p2_;
};
//'reciprocal product' or 'virtual product'
double operator*(const a_plucker& a, const a_plucker& b);
 
std::istream&  operator>> (std::istream& i, a_plucker& f);
std::ostream&  operator<< (std::ostream& o, const a_plucker& f);
std::istream&  operator>> (std::istream& i, a_plucker* f);
std::ostream&  operator<< (std::ostream& o, const a_plucker* f);
#endif