diff options
author | Norbert Preining <norbert@preining.info> | 2019-09-02 13:46:59 +0900 |
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committer | Norbert Preining <norbert@preining.info> | 2019-09-02 13:46:59 +0900 |
commit | e0c6872cf40896c7be36b11dcc744620f10adf1d (patch) | |
tree | 60335e10d2f4354b0674ec22d7b53f0f8abee672 /graphics/epix/halfspace.cc |
Initial commit
Diffstat (limited to 'graphics/epix/halfspace.cc')
-rw-r--r-- | graphics/epix/halfspace.cc | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/graphics/epix/halfspace.cc b/graphics/epix/halfspace.cc new file mode 100644 index 0000000000..4be13a979c --- /dev/null +++ b/graphics/epix/halfspace.cc @@ -0,0 +1,67 @@ +/* + * halfspace.cc -- 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 + */ +#include <list> + +#include "triples.h" +#include "edge_data.h" +#include "crop_algorithms.h" + +#include "halfspace.h" + +namespace ePiX { + + halfspace::halfspace(const P& base, const P& perp) + : m_base(base), m_perp((1.0/norm(perp))*perp) { } + + halfspace& halfspace::reverse() + { + m_perp *= -1; + return *this; + } + + bool halfspace::clips(const P& arg) const + { + return height(m_perp, m_base, arg) < -EPIX_EPSILON; + } + + std::list<edge3d>& halfspace::clip_path(std::list<edge3d>& L) const + { + return chop_path<P>(m_perp, m_base, L); + } + + std::list<edge3d>& halfspace::clip_loop(std::list<edge3d>& L) const + { + return chop_loop<P>(m_perp, m_base, L); + } +} // end of namespace |