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/*
* halfspace.h -- ePiX::halfspace class for clipping
*
* This file is part of ePiX, a C++ library for creating high-quality
* figures in LaTeX
*
* Version 1.1.8
* Last Change: July 17, 2007
*/
/*
* Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007
* Andrew D. Hwang <rot 13 nujnat at zngupf dot ubylpebff dot rqh>
* 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.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
* This file provides the halfspace class for path clipping.
* A halfspace contains a base point p and a unit vector n, and defines the
* affine half space (x-p)|n > 0; n points "inward".
*/
#ifndef EPIX_HALFSPACE
#define EPIX_HALFSPACE
#include <list>
#include "triples.h"
#include "edge_data.h"
namespace ePiX {
class halfspace {
public:
halfspace(const P& base, const P& perp);
halfspace& reverse();
bool clips(const P&) const;
std::list<edge3d>& clip_path(std::list<edge3d>&) const;
std::list<edge3d>& clip_loop(std::list<edge3d>&) const;
private:
P m_base;
P m_perp;
}; // end of class halfspace
} // end of namespace
#endif /* EPIX_HALFSPACE */
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