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Diffstat (limited to 'basegfx/source/numeric/ftools.cxx')
-rw-r--r-- | basegfx/source/numeric/ftools.cxx | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/basegfx/source/numeric/ftools.cxx b/basegfx/source/numeric/ftools.cxx new file mode 100644 index 000000000000..a67bc56bd74e --- /dev/null +++ b/basegfx/source/numeric/ftools.cxx @@ -0,0 +1,49 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of + * the License at http://www.apache.org/licenses/LICENSE-2.0 . + */ + +#include <basegfx/numeric/ftools.hxx> +#include <algorithm> + +namespace basegfx +{ + double snapToNearestMultiple(double v, const double fStep) + { + if(fTools::equalZero(fStep)) + { + // with a zero step, all snaps to 0.0 + return 0.0; + } + else + { + const double fHalfStep(fStep * 0.5); + const double fChange(fHalfStep - fmod(v + fHalfStep, fStep)); + + if(basegfx::fTools::equal(fabs(v), fabs(fChange))) + { + return 0.0; + } + else + { + return v + fChange; + } + } + } +} // end of namespace basegfx + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |