ceph/src/boost/boost/geometry/srs/projections/impl/pj_inv.hpp

   1 // Boost.Geometry (aka GGL, Generic Geometry Library)
   2 // This file is manually converted from PROJ4
   3
   4 // Copyright (c) 2008-2012 Barend Gehrels, Amsterdam, the Netherlands.
   5
   6 // This file was modified by Oracle on 2017, 2019.
   7 // Modifications copyright (c) 2017-2019, Oracle and/or its affiliates.
   8 // Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
   9
  10 // Use, modification and distribution is subject to the Boost Software License,
  11 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
  12 // http://www.boost.org/LICENSE_1_0.txt)
  13
  14 // This file is converted from PROJ4, http://trac.osgeo.org/proj
  15 // PROJ4 is originally written by Gerald Evenden (then of the USGS)
  16 // PROJ4 is maintained by Frank Warmerdam
  17 // PROJ4 is converted to Geometry Library by Barend Gehrels (Geodan, Amsterdam)
  18
  19 // Original copyright notice:
  20
  21 // Permission is hereby granted, free of charge, to any person obtaining a
  22 // copy of this software and associated documentation files (the "Software"),
  23 // to deal in the Software without restriction, including without limitation
  24 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
  25 // and/or sell copies of the Software, and to permit persons to whom the
  26 // Software is furnished to do so, subject to the following conditions:
  27
  28 // The above copyright notice and this permission notice shall be included
  29 // in all copies or substantial portions of the Software.
  30
  31 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  32 // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  33 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  34 // THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  35 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  36 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  37 // DEALINGS IN THE SOFTWARE.
  38
  39 #ifndef BOOST_GEOMETRY_PROJECTIONS_PJ_INV_HPP
  40 #define BOOST_GEOMETRY_PROJECTIONS_PJ_INV_HPP
  41
  42
  43
  44 #include <boost/geometry/srs/projections/impl/adjlon.hpp>
  45 #include <boost/geometry/core/radian_access.hpp>
  46 #include <boost/geometry/util/math.hpp>
  47
  48 /* general inverse projection */
  49
  50 namespace boost { namespace geometry { namespace projections
  51 {
  52
  53 namespace detail
  54 {
  55
  56  /* inverse projection entry */
  57 template <typename PRJ, typename LL, typename XY, typename PAR>
  58 inline void pj_inv(PRJ const& prj, PAR const& par, XY const& xy, LL& ll)
  59 {
  60     typedef typename PAR::type calc_t;
  61     static const calc_t EPS = 1.0e-12;
  62
  63     /* can't do as much preliminary checking as with forward */
  64     /* descale and de-offset */
  65     calc_t lon = 0;
  66     calc_t lat = 0;
  67     calc_t xy_x = 0;
  68     calc_t xy_y = 0;
  69
  70     if (par.axis[0] == 1)
  71     {
  72         xy_x = (geometry::get<1>(xy) * par.to_meter * par.sign[1] - par.x0) * par.ra;
  73         xy_y = (geometry::get<0>(xy) * par.to_meter * par.sign[0] - par.y0) * par.ra;
  74     } else {
  75         xy_x = (geometry::get<0>(xy) * par.to_meter * par.sign[0] - par.x0) * par.ra;
  76         xy_y = (geometry::get<1>(xy) * par.to_meter * par.sign[1] - par.y0) * par.ra;
  77     }
  78
  79     prj.inv(par, xy_x, xy_y, lon, lat); /* inverse project */
  80
  81     lon += par.lam0; /* reduce from del lp.lam */
  82     if (!par.over)
  83         lon = adjlon(lon); /* adjust longitude to CM */
  84     if (par.geoc && geometry::math::abs(geometry::math::abs(lat)-geometry::math::half_pi<calc_t>()) > EPS)
  85         lat = atan(par.one_es * tan(lat));
  86
  87     geometry::set_from_radian<0>(ll, lon);
  88     geometry::set_from_radian<1>(ll, lat);
  89 }
  90
  91 } // namespace detail
  92 }}} // namespace boost::geometry::projections
  93
  94 #endif