From e0c6872cf40896c7be36b11dcc744620f10adf1d Mon Sep 17 00:00:00 2001
From: Norbert Preining <norbert@preining.info>
Date: Mon, 2 Sep 2019 13:46:59 +0900
Subject: Initial commit

---
 graphics/epix/segment.cc | 111 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 111 insertions(+)
 create mode 100644 graphics/epix/segment.cc

(limited to 'graphics/epix/segment.cc')

diff --git a/graphics/epix/segment.cc b/graphics/epix/segment.cc
new file mode 100644
index 0000000000..3ea5eb3760
--- /dev/null
+++ b/graphics/epix/segment.cc
@@ -0,0 +1,111 @@
+/* 
+ * segment.cc -- ePiX::Segment class and mathematical operators
+ *
+ * This file is part of ePiX, a C++ library for creating high-quality 
+ * figures in LaTeX 
+ *
+ * Version 1.1.9
+ * Last Change: July 30, 2007
+ */
+
+/* 
+ * Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006
+ * 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 "triples.h"
+
+#include "path.h"
+#include "segment.h"
+
+namespace ePiX {
+
+  Segment::Segment(const P& p1, const P& p2)
+    : m_endpt1(p1), m_endpt2(p2), m_malformed(false) { }
+
+  Segment::Segment(bool tag) : m_malformed(true) { }
+
+  P Segment::end1() const
+  {
+    return m_endpt1;
+  }
+
+  P Segment::end2() const
+  {
+    return m_endpt2;
+  }
+
+  bool Segment::malformed() const
+  {
+    return m_malformed;
+  }
+
+  // translate
+  Segment& Segment::shift(const P& arg)
+  {
+    if (!m_malformed)
+      {
+	m_endpt1 += arg;
+	m_endpt2 += arg;
+      }
+    return *this;
+  }
+
+  Segment& Segment::move_to(const P& arg)
+  {
+    if (!m_malformed)
+      {
+	const P dX(arg - 0.5*(m_endpt1 + m_endpt2));
+	m_endpt1 += dX;
+	m_endpt2 += dX;
+      }
+    return *this;
+  }
+
+  Segment& Segment::scale(double c)
+  {
+    if (!m_malformed)
+      {
+	const P ctr(0.5*(m_endpt1 + m_endpt2));
+
+	m_endpt1 = ctr + c*(m_endpt1 - ctr);
+	m_endpt2 = ctr + c*(m_endpt2 - ctr);
+      }
+    return *this;
+  }
+
+  P Segment::midpoint() const
+  {
+    return 0.5*(m_endpt1 + m_endpt2);
+  }
+
+  void Segment::draw() const
+  {
+    if (m_malformed)
+      return;
+
+    // else
+    path temp(m_endpt1, m_endpt2);
+
+    temp.draw();
+  }
+} // end of namespace
-- 
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