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// Boost.Geometry (aka GGL, Generic Geometry Library)
// Copyright (c) 2016, Oracle and/or its affiliates.
// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
// Use, modification and distribution is subject to the Boost Software License,
// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#ifndef BOOST_GEOMETRY_ARITHMETIC_NORMALIZE_HPP
#define BOOST_GEOMETRY_ARITHMETIC_NORMALIZE_HPP
#include <boost/geometry/core/coordinate_type.hpp>
#include <boost/geometry/arithmetic/arithmetic.hpp>
#include <boost/geometry/arithmetic/dot_product.hpp>
#include <boost/geometry/util/math.hpp>
namespace boost { namespace geometry
{
#ifndef DOXYGEN_NO_DETAIL
namespace detail
{
template <typename Point>
inline typename coordinate_type<Point>::type vec_length_sqr(Point const& pt)
{
return dot_product(pt, pt);
}
template <typename Point>
inline typename coordinate_type<Point>::type vec_length(Point const& pt)
{
// NOTE: hypot() could be used instead of sqrt()
return math::sqrt(dot_product(pt, pt));
}
template <typename Point>
inline bool vec_normalize(Point & pt, typename coordinate_type<Point>::type & len)
{
typedef typename coordinate_type<Point>::type coord_t;
coord_t const c0 = 0;
len = vec_length(pt);
if (math::equals(len, c0))
{
return false;
}
divide_value(pt, len);
return true;
}
template <typename Point>
inline bool vec_normalize(Point & pt)
{
typedef typename coordinate_type<Point>::type coord_t;
coord_t len;
return vec_normalize(pt, len);
}
} // namespace detail
#endif // DOXYGEN_NO_DETAIL
}} // namespace boost::geometry
#endif // BOOST_GEOMETRY_ARITHMETIC_NORMALIZE_HPP
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