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-rw-r--r--graphics/epix/angle_units.cc94
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diff --git a/graphics/epix/angle_units.cc b/graphics/epix/angle_units.cc
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--- a/graphics/epix/angle_units.cc
+++ /dev/null
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-/*
- * angle_units.cc -- Implementation of ePiX's angular units
- *
- * This file is part of ePiX, a C++ library for creating high-quality
- * figures in LaTeX
- *
- * Version 1.1.22
- * Last Change: September 24, 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 "constants.h"
-#include "angle_units.h"
-
-namespace ePiX {
-
- angle_state::angle_state()
- : m_rad_per_unit(1.0),
- m_unit_per_deg(PI_180),
- m_rev_per_unit(1.0/TWO_PI) { }
-
- void angle_state::set_radians_mode()
- {
- m_rad_per_unit = 1.0;
- m_unit_per_deg = PI_180;
- m_rev_per_unit = 1.0/TWO_PI;
- }
-
- void angle_state::set_degrees_mode()
- {
- m_rad_per_unit = PI_180;
- m_unit_per_deg = 1.0;
- m_rev_per_unit = 1.0/360;
- }
-
- void angle_state::set_revolutions_mode()
- {
- m_rad_per_unit = TWO_PI;
- m_unit_per_deg = 1.0/360;
- m_rev_per_unit = 1.0;
- }
-
-
- double angle_state::to_radians(double t)
- {
- return t *= m_rad_per_unit;
- }
-
- // result lies in (-180, 180]
- double angle_state::to_degrees(double t)
- {
- t *= m_rev_per_unit;
-
- t -= 0.5; // shift half a turn
- t -= ceil(t); // map to (-1,0]
- t += 0.5; // shift to (-0.5, 0.5]
-
- return t *= 360.0;
- }
-
- double angle_state::from_degrees(double t)
- {
- return t *= m_unit_per_deg;
- }
-
- angle_state& the_angle_style()
- {
- static angle_state* the_angle_state(new angle_state());
- return *the_angle_state;
- }
-} // end of namespace