/***************************************************************************** * * This file is part of Mapnik (c++ mapping toolkit) * * Copyright (C) 2006 Artem Pavlenko, Jean-Francois Doyon * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA * *****************************************************************************/ #include <mapnik/config.hpp> #include "boost_std_shared_shim.hpp" // boost #include <boost/python.hpp> // mapnik #include <mapnik/coord.hpp> #include <mapnik/box2d.hpp> #include <mapnik/projection.hpp> using mapnik::projection; struct projection_pickle_suite : boost::python::pickle_suite { static boost::python::tuple getinitargs(const projection& p) { using namespace boost::python; return boost::python::make_tuple(p.params()); } }; namespace { mapnik::coord2d forward_pt(mapnik::coord2d const& pt, mapnik::projection const& prj) { double x = pt.x; double y = pt.y; prj.forward(x,y); return mapnik::coord2d(x,y); } mapnik::coord2d inverse_pt(mapnik::coord2d const& pt, mapnik::projection const& prj) { double x = pt.x; double y = pt.y; prj.inverse(x,y); return mapnik::coord2d(x,y); } mapnik::box2d<double> forward_env(mapnik::box2d<double> const & box, mapnik::projection const& prj) { double minx = box.minx(); double miny = box.miny(); double maxx = box.maxx(); double maxy = box.maxy(); prj.forward(minx,miny); prj.forward(maxx,maxy); return mapnik::box2d<double>(minx,miny,maxx,maxy); } mapnik::box2d<double> inverse_env(mapnik::box2d<double> const & box, mapnik::projection const& prj) { double minx = box.minx(); double miny = box.miny(); double maxx = box.maxx(); double maxy = box.maxy(); prj.inverse(minx,miny); prj.inverse(maxx,maxy); return mapnik::box2d<double>(minx,miny,maxx,maxy); } } void export_projection () { using namespace boost::python; class_<projection>("Projection", "Represents a map projection.",init<std::string const&>( (arg("proj4_string")), "Constructs a new projection from its PROJ.4 string representation.\n" "\n" "The constructor will throw a RuntimeError in case the projection\n" "cannot be initialized.\n" ) ) .def_pickle(projection_pickle_suite()) .def ("params", make_function(&projection::params, return_value_policy<copy_const_reference>()), "Returns the PROJ.4 string for this projection.\n") .def ("expanded",&projection::expanded, "normalize PROJ.4 definition by expanding +init= syntax\n") .add_property ("geographic", &projection::is_geographic, "This property is True if the projection is a geographic projection\n" "(i.e. it uses lon/lat coordinates)\n") ; def("forward_",&forward_pt); def("inverse_",&inverse_pt); def("forward_",&forward_env); def("inverse_",&inverse_env); }