august.hpp 4.9 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142
  1. // Boost.Geometry - gis-projections (based on PROJ4)
  2. // Copyright (c) 2008-2015 Barend Gehrels, Amsterdam, the Netherlands.
  3. // This file was modified by Oracle on 2017, 2018, 2019.
  4. // Modifications copyright (c) 2017-2019, Oracle and/or its affiliates.
  5. // Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle.
  6. // Use, modification and distribution is subject to the Boost Software License,
  7. // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
  8. // http://www.boost.org/LICENSE_1_0.txt)
  9. // This file is converted from PROJ4, http://trac.osgeo.org/proj
  10. // PROJ4 is originally written by Gerald Evenden (then of the USGS)
  11. // PROJ4 is maintained by Frank Warmerdam
  12. // PROJ4 is converted to Boost.Geometry by Barend Gehrels
  13. // Last updated version of proj: 5.0.0
  14. // Original copyright notice:
  15. // Permission is hereby granted, free of charge, to any person obtaining a
  16. // copy of this software and associated documentation files (the "Software"),
  17. // to deal in the Software without restriction, including without limitation
  18. // the rights to use, copy, modify, merge, publish, distribute, sublicense,
  19. // and/or sell copies of the Software, and to permit persons to whom the
  20. // Software is furnished to do so, subject to the following conditions:
  21. // The above copyright notice and this permission notice shall be included
  22. // in all copies or substantial portions of the Software.
  23. // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  24. // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  25. // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  26. // THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  27. // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  28. // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  29. // DEALINGS IN THE SOFTWARE.
  30. #ifndef BOOST_GEOMETRY_PROJECTIONS_AUGUST_HPP
  31. #define BOOST_GEOMETRY_PROJECTIONS_AUGUST_HPP
  32. #include <boost/geometry/srs/projections/impl/base_static.hpp>
  33. #include <boost/geometry/srs/projections/impl/base_dynamic.hpp>
  34. #include <boost/geometry/srs/projections/impl/projects.hpp>
  35. #include <boost/geometry/srs/projections/impl/factory_entry.hpp>
  36. namespace boost { namespace geometry
  37. {
  38. namespace projections
  39. {
  40. #ifndef DOXYGEN_NO_DETAIL
  41. namespace detail { namespace august
  42. {
  43. //static const double M = 1.333333333333333;
  44. template <typename T, typename Parameters>
  45. struct base_august_spheroid
  46. {
  47. // FORWARD(s_forward) spheroid
  48. // Project coordinates from geographic (lon, lat) to cartesian (x, y)
  49. inline void fwd(Parameters const& , T lp_lon, T const& lp_lat, T& xy_x, T& xy_y) const
  50. {
  51. static const T M = 1.333333333333333333333333333333333333;
  52. T t, c1, c, x1, x12, y1, y12;
  53. t = tan(.5 * lp_lat);
  54. c1 = sqrt(1. - t * t);
  55. c = 1. + c1 * cos(lp_lon *= .5);
  56. x1 = sin(lp_lon) * c1 / c;
  57. y1 = t / c;
  58. xy_x = M * x1 * (3. + (x12 = x1 * x1) - 3. * (y12 = y1 * y1));
  59. xy_y = M * y1 * (3. + 3. * x12 - y12);
  60. }
  61. static inline std::string get_name()
  62. {
  63. return "august_spheroid";
  64. }
  65. };
  66. // August Epicycloidal
  67. template <typename Parameters>
  68. inline void setup_august(Parameters& par)
  69. {
  70. par.es = 0.;
  71. }
  72. }} // namespace detail::august
  73. #endif // doxygen
  74. /*!
  75. \brief August Epicycloidal projection
  76. \ingroup projections
  77. \tparam Geographic latlong point type
  78. \tparam Cartesian xy point type
  79. \tparam Parameters parameter type
  80. \par Projection characteristics
  81. - Miscellaneous
  82. - Spheroid
  83. - no inverse
  84. \par Example
  85. \image html ex_august.gif
  86. */
  87. template <typename T, typename Parameters>
  88. struct august_spheroid : public detail::august::base_august_spheroid<T, Parameters>
  89. {
  90. template <typename Params>
  91. inline august_spheroid(Params const& , Parameters & par)
  92. {
  93. detail::august::setup_august(par);
  94. }
  95. };
  96. #ifndef DOXYGEN_NO_DETAIL
  97. namespace detail
  98. {
  99. // Static projection
  100. BOOST_GEOMETRY_PROJECTIONS_DETAIL_STATIC_PROJECTION_F(srs::spar::proj_august, august_spheroid)
  101. // Factory entry(s)
  102. BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_ENTRY_F(august_entry, august_spheroid)
  103. BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_INIT_BEGIN(august_init)
  104. {
  105. BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_INIT_ENTRY(august, august_entry)
  106. }
  107. } // namespace detail
  108. #endif // doxygen
  109. } // namespace projections
  110. }} // namespace boost::geometry
  111. #endif // BOOST_GEOMETRY_PROJECTIONS_AUGUST_HPP