From c853ffb5b2f75f5a889ed2e3ef89b818a736e87a Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 13 Apr 2024 13:50:49 +0200 Subject: Adding upstream version 1.3+ds. Signed-off-by: Daniel Baumann --- src/mod360.cpp | 60 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 60 insertions(+) create mode 100644 src/mod360.cpp (limited to 'src/mod360.cpp') diff --git a/src/mod360.cpp b/src/mod360.cpp new file mode 100644 index 0000000..a8c9089 --- /dev/null +++ b/src/mod360.cpp @@ -0,0 +1,60 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/** @file + * TODO: insert short description here + *//* + * Authors: see git history + * + * Copyright (C) 2018 Authors + * Released under GNU GPL v2+, read the file 'COPYING' for more information. + */ +#include +#include + +#include "2geom/angle.h" +#include "mod360.h" + +/** Returns \a x wrapped around to between 0 and less than 360, + or 0 if \a x isn't finite. +**/ +double mod360(double const x) +{ + double m = fmod(x, 360.0); + if (std::isnan(m)) { + m = 0.0; + } else if (m < 0) { + m += 360.0; + } + if (m < 0.0 || m >= 360.0) { + m = 0.0; + } + return m; +} + +/** Returns \a x wrapped around to between -180 and less than 180, + or 0 if \a x isn't finite. +**/ +double mod360symm(double const x) +{ + double m = mod360(x); + + return m < 180.0 ? m : m - 360.0; +} + +double radians_to_degree_mod360(double rad) { + return Geom::Angle::from_radians(rad).degrees(); +} + +double degree_to_radians_mod2pi(double degrees) { + return Geom::Angle::from_degrees(degrees).radians(); +} + +/* + Local Variables: + mode:c++ + c-file-style:"stroustrup" + c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +)) + indent-tabs-mode:nil + fill-column:99 + End: +*/ +// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 : -- cgit v1.2.3