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// Boost.Geometry (aka GGL, Generic Geometry Library)
// This file is manually converted from PROJ4
// Copyright (c) 2008-2012 Barend Gehrels, Amsterdam, the Netherlands.
// 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)
// This file is converted from PROJ4, http://trac.osgeo.org/proj
// PROJ4 is originally written by Gerald Evenden (then of the USGS)
// PROJ4 is maintained by Frank Warmerdam
// PROJ4 is converted to Geometry Library by Barend Gehrels (Geodan, Amsterdam)
// Original copyright notice:
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
#ifndef BOOST_GEOMETRY_PROJECTIONS_IMPL_AASINCOS_HPP
#define BOOST_GEOMETRY_PROJECTIONS_IMPL_AASINCOS_HPP
#include <cmath>
#include <boost/geometry/util/math.hpp>
namespace boost { namespace geometry { namespace projections
{
namespace detail
{
namespace aasincos
{
template <typename T>
inline T ONE_TOL() { return 1.00000000000001; }
//template <typename T>
//inline T TOL() { return 0.000000001; }
template <typename T>
inline T ATOL() { return 1e-50; }
}
template <typename T>
inline T aasin(T const& v)
{
T av = 0;
if ((av = geometry::math::abs(v)) >= 1.0)
{
if (av > aasincos::ONE_TOL<T>())
{
BOOST_THROW_EXCEPTION( projection_exception(-19) );
}
return (v < 0.0 ? -geometry::math::half_pi<T>() : geometry::math::half_pi<T>());
}
return asin(v);
}
template <typename T>
inline T aacos(T const& v)
{
T av = 0;
if ((av = geometry::math::abs(v)) >= 1.0)
{
if (av > aasincos::ONE_TOL<T>())
{
BOOST_THROW_EXCEPTION( projection_exception(-19) );
}
return (v < 0.0 ? geometry::math::pi<T>() : 0.0);
}
return acos(v);
}
template <typename T>
inline T asqrt(T const& v)
{
return ((v <= 0) ? 0 : sqrt(v));
}
template <typename T>
inline T aatan2(T const& n, T const& d)
{
return ((geometry::math::abs(n) < aasincos::ATOL<T>()
&& geometry::math::abs(d) < aasincos::ATOL<T>()) ? 0.0 : atan2(n, d));
}
} // namespace detail
}}} // namespace boost::geometry::projections
#endif // BOOST_GEOMETRY_PROJECTIONS_IMPL_AASINCOS_HPP
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