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wkb_reader/json input grammar - correct polygons to have CCW exterioir/CW interior

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This commit is contained in:
artemp 2015-03-04 12:09:08 +01:00
parent 9e35540b50
commit f4a1e9368b
2 changed files with 10 additions and 1 deletions
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6
include/mapnik/json/geometry_util.hpp
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@ -24,6 +24,9 @@
#define MAPNIK_JSON_GEOMETRY_UTIL_HPP
#include <mapnik/geometry_impl.hpp>
#include <mapnik/geometry_adapters.hpp>
// boost.geometry
#include <boost/geometry/algorithms/correct.hpp>
namespace mapnik { namespace json {
@ -97,7 +100,8 @@ struct create_polygon
if (i == 0) poly.set_exterior_ring(std::move(ring));
else poly.add_hole(std::move(ring));
}
// correct oriantations etc
boost::geometry::correct(poly);
geom_ = std::move(poly);
}

5
src/wkb.cpp
View file

@ -27,6 +27,9 @@
#include <mapnik/wkb.hpp>
#include <mapnik/feature.hpp>
#include <mapnik/util/noncopyable.hpp>
#include <mapnik/geometry_adapters.hpp>
// boost.geometry
#include <boost/geometry/algorithms/correct.hpp>
namespace mapnik
{
@ -318,6 +321,8 @@ private:
if ( i == 0) poly.set_exterior_ring(std::move(ring));
else poly.add_hole(std::move(ring));
}
// correct orientations etc
boost::geometry::correct(poly);
return poly;
}