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/arrow_data.cc |
Initial commit
Diffstat (limited to 'graphics/epix/arrow_data.cc')
-rw-r--r-- | graphics/epix/arrow_data.cc | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/graphics/epix/arrow_data.cc b/graphics/epix/arrow_data.cc new file mode 100644 index 0000000000..2c50b0f8bc --- /dev/null +++ b/graphics/epix/arrow_data.cc @@ -0,0 +1,130 @@ +/* + * arrow_data.cc -- ePiX arrow class + * + * This file is part of ePiX, a C++ library for creating high-quality + * figures in LaTeX + * + * Version 1.2.0-2 + * Last Change: September 26, 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 <cmath> + +#include "triples.h" +#include "functions.h" + +#include "camera.h" + +#include "edge_data.h" +#include "path_data.h" +#include "clipping.h" + +#include "arrow_style.h" +#include "pen_data.h" +#include "paint_style.h" + +#include "halfspace.h" +#include "pen_line.h" +#include "pen_arrow.h" + +#include "screen_data.h" +#include "screen.h" +#include "active_screen.h" + +#include "arrow_data.h" + +namespace ePiX { + + arrow_data::arrow_data(const std::vector<P>& pv, const P& base, const P& tip, + double scale) + : m_base(base), m_tip(tip), m_scale(scale), + m_head_seen(!the_clip_box().clips(m_tip)) + { + for (unsigned int i=0; i<pv.size()-1; ++i) + m_shaft.push_back(edge3d(pv.at(i), pv.at(i+1), true)); + + the_clip_box().clip_path(m_shaft); + } + + arrow_data& arrow_data::clip_to(const halfspace& knife) + { + knife.clip_path(m_shaft); + if (knife.clips(m_tip)) + m_head_seen = false; + + return *this; + } + + + void arrow_data::photo(screen& scr, const Camera& mycam, + const pen_data& line, const pen_data& under) const + { + arrow_data tmp_data(*this); + if (mycam.needs_clip()) + tmp_data.clip_to(mycam.clip_plane()); + + std::list<edge2d> edges; + for (std::list<edge3d>::const_iterator p=tmp_data.m_shaft.begin(); + p != tmp_data.m_shaft.end(); ++p) + { + edge2d tmp(mycam((*p).tail()), mycam((*p).head()), (*p).is_seen()); + + if (!tmp.is_null()) // endpoints not equal + edges.push_back(tmp); + } + + // draw shaft + scr.m_screen->add_tile(pen_line(line.seen_through(mycam), + under.seen_through(mycam), edges)); + + // and arrowhead + if (m_head_seen) + { + const P dir(m_tip-m_base); + const P to_cam(mycam.viewpt()-m_base); + + const double sin_th(norm(dir*to_cam)/(norm(dir)*norm(to_cam))); + + scr.m_screen->add_tile(pen_arrow(mycam(m_base), mycam(m_tip), + line.seen_through(mycam), + under.seen_through(mycam), + m_scale, sin_th, m_head_seen)); + } + } + + void arrow_data::draw() const + { + photo(*active_screen(), cam(), + the_paint_style().line_pen(), the_paint_style().base_pen()); + } + + void arrow_data::draw(const pen_data& p1, const pen_data& p2) const + { + photo(*active_screen(), cam(), p1, p2); + } +} // end of namespace |