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/*
* edge_data.h -- ePiX::edge implementation classes for polyline/polygon
*
* This file is part of ePiX, a C++ library for creating high-quality
* figures in LaTeX
*
* Version 1.2.5
* Last Change: May 06, 2008
*
*
* Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
* Andrew D. Hwang <ahwang -at- holycross -dot- edu>
* Department of Mathematics and Computer Science
* College of the Holy Cross
* Worcester, MA, 01610-2395, USA
*
*
* ePiX 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.
*
* ePiX 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 ePiX; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef EPIX_EDGE_DATA
#define EPIX_EDGE_DATA
#include <algorithm>
#include "triples.h"
#include "pairs.h"
namespace ePiX {
// basic edge data: ordered endpoints and visibility flag
template<typename T> class edge_data {
public:
edge_data(const T& fm, const T& to, bool seen)
: m_tail(fm), m_head(to), m_seen(seen) { }
T tail() const { return m_tail; }
T head() const { return m_head; }
bool is_seen() const { return m_seen; }
bool is_null() const { return m_tail == m_head; }
edge_data& shift(const T& dX)
{
m_tail += dX;
m_head += dX;
return *this;
}
edge_data& reverse()
{
std::swap(m_tail, m_head);
return *this;
}
double length() const
{
return norm(m_head - m_tail);
}
void seen(bool S) { m_seen=S; }
private:
T m_tail;
T m_head;
bool m_seen;
};
typedef edge_data<P> edge3d;
typedef edge_data<pair> edge2d;
} // end of namespace
#endif /* EPIX_EDGE_DATA */
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