summaryrefslogtreecommitdiff
path: root/graphics/epix/arrow_data.cc
diff options
context:
space:
mode:
authorNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
committerNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
commite0c6872cf40896c7be36b11dcc744620f10adf1d (patch)
tree60335e10d2f4354b0674ec22d7b53f0f8abee672 /graphics/epix/arrow_data.cc
Initial commit
Diffstat (limited to 'graphics/epix/arrow_data.cc')
-rw-r--r--graphics/epix/arrow_data.cc130
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