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/*
* clipping.h -- ePiX's clip box
*
* This file is part of ePiX, a C++ library for creating high-quality
* figures in LaTeX
*
* Version 1.1.13
* Last Change: August 23, 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
*/
/*
* The class in this file implements backend for user-level global
* functions defined in state.h. This header is not part of epix.h.
*/
#ifndef EPIX_CLIPPING
#define EPIX_CLIPPING
#include <string>
#include "edge_data.h"
#include "halfspace.h"
namespace ePiX {
class P;
class clip_state {
public:
// create inward-pointing faces of clip_box
clip_state(const P& arg1, const P& arg2);
clip_state(); // very large box by default
// add and remove faces
clip_state& add_face(const P& loc, const P& perp);
clip_state& clear_extras();
bool clips(const P&) const;
// return reference to clipped argument
std::list<edge3d>& clip_path(std::list<edge3d>&) const;
std::list<edge3d>& clip_loop(std::list<edge3d>&) const;
private:
std::list<halfspace> m_walls; // always present
std::list<halfspace> m_extras; // user-added
}; // end of class clip_state
clip_state& the_clip_box();
} // end of namespace
#endif /* EPIX_CLIPPING */
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