284 lines
11 KiB
C++
284 lines
11 KiB
C++
/*****************************************************************************
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*
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* This file is part of Mapnik (c++ mapping toolkit)
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*
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* Copyright (C) 2006 Artem Pavlenko, Jean-Francois Doyon
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*****************************************************************************/
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//$Id: mapnik_envelope.cc 27 2005-03-30 21:45:40Z pavlenko $
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// boost
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#include <boost/python.hpp>
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// mapnik
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#include <mapnik/box2d.hpp>
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#include <mapnik/value_error.hpp>
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using mapnik::coord;
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using mapnik::box2d;
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struct envelope_pickle_suite : boost::python::pickle_suite
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{
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static boost::python::tuple
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getinitargs(const box2d<double>& e)
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{
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using namespace boost::python;
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return boost::python::make_tuple(e.minx(),e.miny(),e.maxx(),e.maxy());
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}
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};
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box2d<double> from_string(std::string const& s)
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{
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box2d<double> bbox;
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bool success = bbox.from_string(s);
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if (success)
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{
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return bbox;
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}
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else
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{
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std::stringstream ss;
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ss << "Could not parse bbox from string: '" << s << "'";
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throw mapnik::value_error(ss.str());
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}
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}
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//define overloads here
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void (box2d<double>::*width_p1)(double) = &box2d<double>::width;
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double (box2d<double>::*width_p2)() const = &box2d<double>::width;
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void (box2d<double>::*height_p1)(double) = &box2d<double>::height;
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double (box2d<double>::*height_p2)() const = &box2d<double>::height;
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void (box2d<double>::*expand_to_include_p1)(double,double) = &box2d<double>::expand_to_include;
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void (box2d<double>::*expand_to_include_p2)(coord<double,2> const& ) = &box2d<double>::expand_to_include;
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void (box2d<double>::*expand_to_include_p3)(box2d<double> const& ) = &box2d<double>::expand_to_include;
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bool (box2d<double>::*contains_p1)(double,double) const = &box2d<double>::contains;
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bool (box2d<double>::*contains_p2)(coord<double,2> const&) const = &box2d<double>::contains;
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bool (box2d<double>::*contains_p3)(box2d<double> const&) const = &box2d<double>::contains;
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//intersects
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bool (box2d<double>::*intersects_p1)(double,double) const = &box2d<double>::intersects;
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bool (box2d<double>::*intersects_p2)(coord<double,2> const&) const = &box2d<double>::intersects;
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bool (box2d<double>::*intersects_p3)(box2d<double> const&) const = &box2d<double>::intersects;
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// intersect
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box2d<double> (box2d<double>::*intersect)(box2d<double> const&) const = &box2d<double>::intersect;
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// re_center
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void (box2d<double>::*re_center_p1)(double,double) = &box2d<double>::re_center;
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void (box2d<double>::*re_center_p2)(coord<double,2> const& ) = &box2d<double>::re_center;
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// clip
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void (box2d<double>::*clip)(box2d<double> const&) = &box2d<double>::clip;
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// deepcopy
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box2d<double> box2d_deepcopy(box2d<double> & obj, boost::python::dict memo)
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{
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// FIXME::ignore memo for now
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box2d<double> result(obj);
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return result;
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}
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void export_envelope()
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{
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using namespace boost::python;
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class_<box2d<double> >("Box2d",
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// class docstring is in mapnik/__init__.py, class _Coord
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init<double,double,double,double>(
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(arg("minx"),arg("miny"),arg("maxx"),arg("maxy")),
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"Constructs a new envelope from the coordinates\n"
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"of its lower left and upper right corner points.\n"))
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.def(init<>("Equivalent to Box2d(0, 0, -1, -1).\n"))
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.def(init<const coord<double,2>&, const coord<double,2>&>(
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(arg("ll"),arg("ur")),
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"Equivalent to Box2d(ll.x, ll.y, ur.x, ur.y).\n"))
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.def("from_string",from_string)
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.staticmethod("from_string")
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.add_property("minx", &box2d<double>::minx,
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"X coordinate for the lower left corner")
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.add_property("miny", &box2d<double>::miny,
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"Y coordinate for the lower left corner")
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.add_property("maxx", &box2d<double>::maxx,
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"X coordinate for the upper right corner")
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.add_property("maxy", &box2d<double>::maxy,
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"Y coordinate for the upper right corner")
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.def("center", &box2d<double>::center,
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"Returns the coordinates of the center of the bounding box.\n"
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"\n"
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"Example:\n"
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">>> e = Box2d(0, 0, 100, 100)\n"
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">>> e.center()\n"
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"Coord(50, 50)\n")
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.def("center", re_center_p1,
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(arg("x"), arg("y")),
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"Moves the envelope so that the given coordinates become its new center.\n"
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"The width and the height are preserved.\n"
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"\n "
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"Example:\n"
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">>> e = Box2d(0, 0, 100, 100)\n"
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">>> e.center(60, 60)\n"
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">>> e.center()\n"
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"Coord(60.0,60.0)\n"
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">>> (e.width(), e.height())\n"
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"(100.0, 100.0)\n"
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">>> e\n"
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"Box2d(10.0, 10.0, 110.0, 110.0)\n"
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)
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.def("center", re_center_p2,
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(arg("Coord")),
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"Moves the envelope so that the given coordinates become its new center.\n"
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"The width and the height are preserved.\n"
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"\n "
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"Example:\n"
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">>> e = Box2d(0, 0, 100, 100)\n"
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">>> e.center(Coord60, 60)\n"
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">>> e.center()\n"
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"Coord(60.0,60.0)\n"
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">>> (e.width(), e.height())\n"
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"(100.0, 100.0)\n"
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">>> e\n"
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"Box2d(10.0, 10.0, 110.0, 110.0)\n"
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)
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.def("clip", clip,
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(arg("other")),
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"Clip the envelope based on the bounds of another envelope.\n"
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"\n "
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"Example:\n"
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">>> e = Box2d(0, 0, 100, 100)\n"
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">>> e.center(Coord60, 60)\n"
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">>> e.center()\n"
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"Coord(60.0,60.0)\n"
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">>> (e.width(), e.height())\n"
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"(100.0, 100.0)\n"
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">>> e\n"
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"Box2d(10.0, 10.0, 110.0, 110.0)\n"
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)
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.def("width", width_p1,
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(arg("new_width")),
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"Sets the width to new_width of the envelope preserving its center.\n"
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"\n "
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"Example:\n"
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">>> e = Box2d(0, 0, 100, 100)\n"
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">>> e.width(120)\n"
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">>> e.center()\n"
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"Coord(50.0,50.0)\n"
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">>> e\n"
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"Box2d(-10.0, 0.0, 110.0, 100.0)\n"
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)
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.def("width", width_p2,
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"Returns the width of this envelope.\n"
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)
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.def("height", height_p1,
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(arg("new_height")),
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"Sets the height to new_height of the envelope preserving its center.\n"
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"\n "
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"Example:\n"
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">>> e = Box2d(0, 0, 100, 100)\n"
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">>> e.height(120)\n"
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">>> e.center()\n"
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"Coord(50.0,50.0)\n"
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">>> e\n"
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"Box2d(0.0, -10.0, 100.0, 110.0)\n"
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)
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.def("height", height_p2,
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"Returns the height of this envelope.\n"
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)
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.def("expand_to_include",expand_to_include_p1,
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(arg("x"),arg("y")),
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"Expands this envelope to include the point given by x and y.\n"
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"\n"
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"Example:\n",
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">>> e = Box2d(0, 0, 100, 100)\n"
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">>> e.expand_to_include(110, 110)\n"
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">>> e\n"
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"Box2d(0.0, 00.0, 110.0, 110.0)\n"
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)
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.def("expand_to_include",expand_to_include_p2,
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(arg("p")),
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"Equivalent to expand_to_include(p.x, p.y)\n"
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)
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.def("expand_to_include",expand_to_include_p3,
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(arg("other")),
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"Equivalent to:\n"
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" expand_to_include(other.minx, other.miny)\n"
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" expand_to_include(other.maxx, other.maxy)\n"
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)
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.def("contains",contains_p1,
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(arg("x"),arg("y")),
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"Returns True iff this envelope contains the point\n"
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"given by x and y.\n"
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)
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.def("contains",contains_p2,
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(arg("p")),
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"Equivalent to contains(p.x, p.y)\n"
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)
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.def("contains",contains_p3,
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(arg("other")),
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"Equivalent to:\n"
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" contains(other.minx, other.miny) and contains(other.maxx, other.maxy)\n"
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)
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.def("intersects",intersects_p1,
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(arg("x"),arg("y")),
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"Returns True iff this envelope intersects the point\n"
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"given by x and y.\n"
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"\n"
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"Note: For points, intersection is equivalent\n"
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"to containment, i.e. the following holds:\n"
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" e.contains(x, y) == e.intersects(x, y)\n"
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)
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.def("intersects",intersects_p2,
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(arg("p")),
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"Equivalent to contains(p.x, p.y)\n")
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.def("intersects",intersects_p3,
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(arg("other")),
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"Returns True iff this envelope intersects the other envelope,\n"
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"This relationship is symmetric."
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"\n"
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"Example:\n"
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">>> e1 = Box2d(0, 0, 100, 100)\n"
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">>> e2 = Box2d(50, 50, 150, 150)\n"
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">>> e1.intersects(e2)\n"
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"True\n"
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">>> e1.contains(e2)\n"
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"False\n"
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)
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.def("intersect",intersect,
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(arg("other")),
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"Returns the overlap of this envelope and the other envelope\n"
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"as a new envelope.\n"
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"\n"
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"Example:\n"
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">>> e1 = Box2d(0, 0, 100, 100)\n"
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">>> e2 = Box2d(50, 50, 150, 150)\n"
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">>> e1.intersect(e2)\n"
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"Box2d(50.0, 50.0, 100.0, 100.0)\n"
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)
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.def(self == self) // __eq__
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.def(self != self) // __neq__
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.def(self + self) // __add__
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.def(self * float()) // __mult__
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.def(float() * self)
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.def(self / float()) // __div__
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.def("__getitem__",&box2d<double>::operator[])
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.def("valid",&box2d<double>::valid)
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.def_pickle(envelope_pickle_suite())
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.def("__deepcopy__", &box2d_deepcopy)
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;
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}
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