From cca66b9ec4e494c1d919bff0f71a820d8afab1fa Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:24:48 +0200 Subject: Adding upstream version 1.2.2. Signed-off-by: Daniel Baumann --- src/3rdparty/libdepixelize/priv/integral.h | 61 ++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+) create mode 100644 src/3rdparty/libdepixelize/priv/integral.h (limited to 'src/3rdparty/libdepixelize/priv/integral.h') diff --git a/src/3rdparty/libdepixelize/priv/integral.h b/src/3rdparty/libdepixelize/priv/integral.h new file mode 100644 index 0000000..fc1a49f --- /dev/null +++ b/src/3rdparty/libdepixelize/priv/integral.h @@ -0,0 +1,61 @@ +/* This file is part of the libdepixelize project + Copyright (C) 2013 Vinícius dos Santos Oliveira + + GNU Lesser General Public License Usage + This library is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by the + Free Software Foundation; either version 2.1 of the License, or (at your + option) any later version. + You should have received a copy of the GNU Lesser General Public License + along with this library. If not, see . + + GNU General Public License Usage + Alternatively, this library may be used 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. + You should have received a copy of the GNU General Public License along with + this library. If not, see . + + This library 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 + Lesser General Public License for more details. +*/ + +#ifndef LIBDEPIXELIZE_TRACER_INTEGRAL_H +#define LIBDEPIXELIZE_TRACER_INTEGRAL_H + +#include <2geom/coord.h> + +namespace Tracer { + +/** + * Compute the integral numerically using Gaussian Quadrature rule with + * \p samples number of samples. + */ +template +Geom::Coord integral(F f, T begin, T end, unsigned samples) +{ + T ret = 0; + const T width = (end - begin) / samples; + + for ( unsigned i = 0 ; i != samples ; ++i ) + ret += width * f(begin + width * (i + .5)); + + return ret; +} + +} // namespace Tracer + +#endif // LIBDEPIXELIZE_TRACER_INTEGRAL_H + +/* + 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:encoding=utf-8:textwidth=99 : -- cgit v1.2.3