segment.h

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// -*- C++ -*-
//
// This file is part of libgvectors.
// libgvectors is a C++ library intended for visualizing mathematical vectors.
// Copyright (C) 2007  Rafael Ostertag
//
// 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, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
// USA.
//
// $Id: segment_8h-source.html,v 1.1 2007-09-08 19:02:37 rafi Exp $
//
// File:   segment.h
// Author: Rafael Ostertag
//
// Created on March 12, 2007, 8:36 PM
//


#ifndef _SEGMENT_H
#define _SEGMENT_H

#include <gvenums.h>
#include <color.h>
#include <coordinates.h>

namespace GVectors {
    

    // Forward declaration for Drawer.
    class Drawer;
    
    class Segment  {
    private:
        Color s_color;
        Coordinates from;
        Coordinates to;
        double initial_length;
        double initial_angle;
        
    public:
        Segment();
        Segment(const Coordinates &f, const Coordinates &t);
        Segment(const Coordinates &f, const Coordinates &t, const Color& c);
        virtual ~Segment();
        Segment(const Segment &s);
        
        void set_from(const Coordinates &c);
        void set_to(const Coordinates &c);
        void set(const Coordinates &f, const Coordinates &t);
        void set_pol(const Coordinates &f, double length, double angle, Angle_Type at=ANG_RAD);
        inline void set_color(const Color& c) { s_color = c; }
        inline void color(const Color& c) { s_color = c; }
        
        void get_from(Coordinates &f) const;
        Coordinates get_from() const;
        void get_to(Coordinates &t) const;
        Coordinates get_to() const;
        void get(Coordinates &f, Coordinates &t) const;
        inline Color get_color() const { return s_color; }
        inline Color color() const { return s_color; }
        
        double length() const;
        double angle(Angle_Type at=ANG_RAD) const;
        
        void move_to(const Coordinates &c);
        void move_by(const Coordinates &c);
        void draw(Drawer &d) const;
        
        const Segment& operator=(const Segment &s);
    };
    typedef Segment* se_ptr_t;
    typedef Segment& se_ref_t;
    typedef const Segment* const_se_ptr_t;
    typedef const Segment& const_se_ref_t;
}
#endif  /* _SEGMENT_H */

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