diff options
Diffstat (limited to 'boost/geometry/srs/projections/impl/aasincos.hpp')
-rw-r--r-- | boost/geometry/srs/projections/impl/aasincos.hpp | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/boost/geometry/srs/projections/impl/aasincos.hpp b/boost/geometry/srs/projections/impl/aasincos.hpp new file mode 100644 index 0000000000..4678029bc0 --- /dev/null +++ b/boost/geometry/srs/projections/impl/aasincos.hpp @@ -0,0 +1,114 @@ +// 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 |