topojson - move feature_generator into topojson_utils.hpp
This commit is contained in:
artemp
parent
f65fae66ba
commit
04890c4915
2 changed files with 333 additions and 334 deletions
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@ -25,7 +25,11 @@
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// mapnik
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#include <mapnik/box2d.hpp>
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#include <mapnik/unicode.hpp>
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#include <mapnik/json/topology.hpp>
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#include <mapnik/feature_factory.hpp>
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#include <mapnik/geometry_adapters.hpp>
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#include <mapnik/geometry_correct.hpp>
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namespace mapnik { namespace topojson {
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@ -241,6 +245,334 @@ private:
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std::size_t num_arcs_;
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};
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namespace {
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struct attribute_value_visitor
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{
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public:
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attribute_value_visitor(mapnik::transcoder const& tr)
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: tr_(tr) {}
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mapnik::value operator()(std::string const& val) const
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{
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return mapnik::value(tr_.transcode(val.c_str()));
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}
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template <typename T>
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mapnik::value operator()(T const& val) const
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{
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return mapnik::value(val);
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}
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mapnik::transcoder const& tr_;
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};
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template <typename T>
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void assign_properties(mapnik::feature_impl & feature, T const& geom, mapnik::transcoder const& tr)
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{
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if ( geom.props)
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{
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for (auto const& p : *geom.props)
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{
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feature.put_new(std::get<0>(p), mapnik::util::apply_visitor(attribute_value_visitor(tr),std::get<1>(p)));
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}
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}
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}
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}
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template <typename Context>
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struct feature_generator
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{
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feature_generator(Context & ctx, mapnik::transcoder const& tr, topology const& topo, std::size_t feature_id)
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: ctx_(ctx),
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tr_(tr),
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topo_(topo),
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num_arcs_(topo.arcs.size()),
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feature_id_(feature_id) {}
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feature_ptr operator() (point const& pt) const
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{
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mapnik::feature_ptr feature(mapnik::feature_factory::create(ctx_,feature_id_));
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double x = pt.coord.x;
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double y = pt.coord.y;
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if (topo_.tr)
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{
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x = x * (*topo_.tr).scale_x + (*topo_.tr).translate_x;
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y = y * (*topo_.tr).scale_y + (*topo_.tr).translate_y;
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}
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mapnik::geometry::point<double> point(x, y);
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feature->set_geometry(std::move(point));
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assign_properties(*feature, pt, tr_);
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return feature;
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}
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feature_ptr operator() (multi_point const& multi_pt) const
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{
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mapnik::feature_ptr feature(mapnik::feature_factory::create(ctx_,feature_id_));
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mapnik::geometry::multi_point<double> multi_point;
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multi_point.reserve(multi_pt.points.size());
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for (auto const& pt : multi_pt.points)
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{
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double x = pt.x;
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double y = pt.y;
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if (topo_.tr)
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{
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x = x * (*topo_.tr).scale_x + (*topo_.tr).translate_x;
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y = y * (*topo_.tr).scale_y + (*topo_.tr).translate_y;
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}
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multi_point.add_coord(x, y);
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}
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feature->set_geometry(std::move(multi_point));
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assign_properties(*feature, multi_pt, tr_);
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return feature;
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}
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feature_ptr operator() (linestring const& line) const
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{
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mapnik::feature_ptr feature(mapnik::feature_factory::create(ctx_,feature_id_));
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if (num_arcs_ > 0)
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{
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index_type index = line.ring;
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index_type arc_index = index < 0 ? std::abs(index) - 1 : index;
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if (arc_index >= 0 && arc_index < static_cast<int>(num_arcs_))
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{
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auto const& arcs = topo_.arcs[arc_index];
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double px = 0, py = 0;
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mapnik::geometry::line_string<double> line_string;
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line_string.reserve(arcs.coordinates.size());
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for (auto pt : arcs.coordinates)
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{
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double x = pt.x;
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double y = pt.y;
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if (topo_.tr)
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{
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x = (px += x) * (*topo_.tr).scale_x + (*topo_.tr).translate_x;
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y = (py += y) * (*topo_.tr).scale_y + (*topo_.tr).translate_y;
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}
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line_string.add_coord(x,y);
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}
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feature->set_geometry(std::move(line_string));
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assign_properties(*feature, line, tr_);
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}
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}
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return feature;
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}
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feature_ptr operator() (multi_linestring const& multi_line) const
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{
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mapnik::feature_ptr feature(mapnik::feature_factory::create(ctx_,feature_id_));
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if (num_arcs_ > 0)
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{
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mapnik::geometry::multi_line_string<double> multi_line_string;
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bool hit = false;
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multi_line_string.reserve(multi_line.rings.size());
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for (auto const& index : multi_line.rings)
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{
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index_type arc_index = index < 0 ? std::abs(index) - 1 : index;
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if (arc_index >= 0 && arc_index < static_cast<int>(num_arcs_))
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{
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hit = true;
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double px = 0, py = 0;
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mapnik::geometry::line_string<double> line_string;
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auto const& arcs = topo_.arcs[arc_index];
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line_string.reserve(arcs.coordinates.size());
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for (auto pt : arcs.coordinates)
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{
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double x = pt.x;
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double y = pt.y;
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if (topo_.tr)
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{
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x = (px += x) * (*topo_.tr).scale_x + (*topo_.tr).translate_x;
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y = (py += y) * (*topo_.tr).scale_y + (*topo_.tr).translate_y;
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}
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line_string.add_coord(x, y);
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}
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multi_line_string.push_back(std::move(line_string));
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}
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}
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if (hit)
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{
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feature->set_geometry(std::move(multi_line_string));
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assign_properties(*feature, multi_line, tr_);
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}
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}
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return feature;
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}
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feature_ptr operator() (polygon const& poly) const
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{
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mapnik::feature_ptr feature(mapnik::feature_factory::create(ctx_,feature_id_));
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if (num_arcs_ > 0)
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{
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std::vector<mapnik::topojson::coordinate> processed_coords;
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mapnik::geometry::polygon<double> polygon;
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if (poly.rings.size() > 1) polygon.interior_rings.reserve(poly.rings.size() - 1);
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bool first = true;
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bool hit = false;
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for (auto const& ring : poly.rings)
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{
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mapnik::geometry::linear_ring<double> linear_ring;
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for (auto const& index : ring)
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{
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double px = 0, py = 0;
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bool reverse = index < 0;
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index_type arc_index = reverse ? std::abs(index) - 1 : index;
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if (arc_index >= 0 && arc_index < static_cast<int>(num_arcs_))
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{
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hit = true;
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auto const& arcs = topo_.arcs[arc_index];
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auto const& coords = arcs.coordinates;
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processed_coords.clear();
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processed_coords.reserve(coords.size());
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for (auto const& pt : coords )
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{
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double x = pt.x;
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double y = pt.y;
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if (topo_.tr)
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{
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transform const& tr = *topo_.tr;
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x = (px += x) * tr.scale_x + tr.translate_x;
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y = (py += y) * tr.scale_y + tr.translate_y;
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}
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processed_coords.emplace_back(coordinate{x,y});
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}
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if (reverse)
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{
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for (auto const& c : processed_coords | boost::adaptors::reversed)
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{
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linear_ring.emplace_back(c.x, c.y);
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}
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}
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else
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{
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for (auto const& c : processed_coords)
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{
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linear_ring.emplace_back(c.x, c.y);
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}
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}
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}
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}
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if (first)
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{
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first = false;
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polygon.set_exterior_ring(std::move(linear_ring));
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}
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else
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{
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polygon.add_hole(std::move(linear_ring));
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}
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}
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if (hit)
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{
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mapnik::geometry::correct(polygon);
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feature->set_geometry(std::move(polygon));
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assign_properties(*feature, poly, tr_);
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}
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}
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return feature;
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}
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feature_ptr operator() (multi_polygon const& multi_poly) const
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{
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mapnik::feature_ptr feature(mapnik::feature_factory::create(ctx_,feature_id_));
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if (num_arcs_ > 0)
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{
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std::vector<mapnik::topojson::coordinate> processed_coords;
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mapnik::geometry::multi_polygon<double> multi_polygon;
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multi_polygon.reserve(multi_poly.polygons.size());
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bool hit = false;
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for (auto const& poly : multi_poly.polygons)
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{
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bool first = true;
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mapnik::geometry::polygon<double> polygon;
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if (poly.size() > 1) polygon.interior_rings.reserve(poly.size() - 1);
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for (auto const& ring : poly)
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{
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mapnik::geometry::linear_ring<double> linear_ring;
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for (auto const& index : ring)
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{
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double px = 0, py = 0;
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bool reverse = index < 0;
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index_type arc_index = reverse ? std::abs(index) - 1 : index;
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if (arc_index >= 0 && arc_index < static_cast<int>(num_arcs_))
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{
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hit = true;
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auto const& arcs = topo_.arcs[arc_index];
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auto const& coords = arcs.coordinates;
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processed_coords.clear();
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processed_coords.reserve(coords.size());
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for (auto const& pt : coords )
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{
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double x = pt.x;
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double y = pt.y;
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if (topo_.tr)
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{
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x = (px += x) * (*topo_.tr).scale_x + (*topo_.tr).translate_x;
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y = (py += y) * (*topo_.tr).scale_y + (*topo_.tr).translate_y;
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}
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processed_coords.emplace_back(coordinate{x,y});
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}
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using namespace boost::adaptors;
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if (reverse)
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{
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for (auto const& c : (processed_coords | reversed))
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{
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linear_ring.add_coord(c.x, c.y);
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}
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}
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else
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{
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for (auto const& c : processed_coords)
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{
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linear_ring.add_coord(c.x, c.y);
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}
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}
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}
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}
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if (first)
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{
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first = false;
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polygon.set_exterior_ring(std::move(linear_ring));
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}
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else
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{
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polygon.add_hole(std::move(linear_ring));
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}
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}
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multi_polygon.push_back(std::move(polygon));
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}
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if (hit)
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{
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mapnik::geometry::correct(multi_polygon);
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feature->set_geometry(std::move(multi_polygon));
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assign_properties(*feature, multi_poly, tr_);
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}
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}
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return feature;
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}
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template<typename T>
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feature_ptr operator() (T const& ) const
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{
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return feature_ptr();
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}
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Context & ctx_;
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mapnik::transcoder const& tr_;
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topology const& topo_;
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std::size_t num_arcs_;
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std::size_t feature_id_;
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};
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}}
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#endif //MAPNIK_TOPOJSON_UTILS_HPP
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@ -21,13 +21,8 @@
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*****************************************************************************/
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// mapnik
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#include <mapnik/feature.hpp>
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#include <mapnik/feature_factory.hpp>
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#include <mapnik/json/topology.hpp>
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#include <mapnik/util/variant.hpp>
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#include <mapnik/geometry_adapters.hpp>
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#include <mapnik/geometry_correct.hpp>
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#include <mapnik/json/topojson_utils.hpp>
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// stl
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#include <string>
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#include <vector>
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@ -40,334 +35,6 @@
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#include "topojson_featureset.hpp"
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namespace mapnik { namespace topojson {
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struct attribute_value_visitor
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{
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public:
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attribute_value_visitor(mapnik::transcoder const& tr)
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: tr_(tr) {}
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mapnik::value operator()(std::string const& val) const
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{
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return mapnik::value(tr_.transcode(val.c_str()));
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}
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template <typename T>
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mapnik::value operator()(T const& val) const
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{
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return mapnik::value(val);
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}
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mapnik::transcoder const& tr_;
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};
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template <typename T>
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void assign_properties(mapnik::feature_impl & feature, T const& geom, mapnik::transcoder const& tr)
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{
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if ( geom.props)
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{
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for (auto const& p : *geom.props)
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{
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feature.put_new(std::get<0>(p), mapnik::util::apply_visitor(attribute_value_visitor(tr),std::get<1>(p)));
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}
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}
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}
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template <typename Context>
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struct feature_generator
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{
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feature_generator(Context & ctx, mapnik::transcoder const& tr, topology const& topo, std::size_t feature_id)
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: ctx_(ctx),
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tr_(tr),
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topo_(topo),
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num_arcs_(topo.arcs.size()),
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feature_id_(feature_id) {}
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feature_ptr operator() (point const& pt) const
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{
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mapnik::feature_ptr feature(mapnik::feature_factory::create(ctx_,feature_id_));
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double x = pt.coord.x;
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double y = pt.coord.y;
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if (topo_.tr)
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{
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x = x * (*topo_.tr).scale_x + (*topo_.tr).translate_x;
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y = y * (*topo_.tr).scale_y + (*topo_.tr).translate_y;
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}
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mapnik::geometry::point<double> point(x, y);
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feature->set_geometry(std::move(point));
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assign_properties(*feature, pt, tr_);
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return feature;
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}
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feature_ptr operator() (multi_point const& multi_pt) const
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{
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mapnik::feature_ptr feature(mapnik::feature_factory::create(ctx_,feature_id_));
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mapnik::geometry::multi_point<double> multi_point;
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multi_point.reserve(multi_pt.points.size());
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for (auto const& pt : multi_pt.points)
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{
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double x = pt.x;
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double y = pt.y;
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if (topo_.tr)
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{
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x = x * (*topo_.tr).scale_x + (*topo_.tr).translate_x;
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y = y * (*topo_.tr).scale_y + (*topo_.tr).translate_y;
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}
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multi_point.add_coord(x, y);
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}
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feature->set_geometry(std::move(multi_point));
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assign_properties(*feature, multi_pt, tr_);
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return feature;
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}
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feature_ptr operator() (linestring const& line) const
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{
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mapnik::feature_ptr feature(mapnik::feature_factory::create(ctx_,feature_id_));
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if (num_arcs_ > 0)
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{
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index_type index = line.ring;
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index_type arc_index = index < 0 ? std::abs(index) - 1 : index;
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if (arc_index >= 0 && arc_index < static_cast<int>(num_arcs_))
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{
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auto const& arcs = topo_.arcs[arc_index];
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double px = 0, py = 0;
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mapnik::geometry::line_string<double> line_string;
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line_string.reserve(arcs.coordinates.size());
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for (auto pt : arcs.coordinates)
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{
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double x = pt.x;
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double y = pt.y;
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if (topo_.tr)
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{
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x = (px += x) * (*topo_.tr).scale_x + (*topo_.tr).translate_x;
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y = (py += y) * (*topo_.tr).scale_y + (*topo_.tr).translate_y;
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}
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line_string.add_coord(x,y);
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}
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feature->set_geometry(std::move(line_string));
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assign_properties(*feature, line, tr_);
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}
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}
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return feature;
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}
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feature_ptr operator() (multi_linestring const& multi_line) const
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{
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mapnik::feature_ptr feature(mapnik::feature_factory::create(ctx_,feature_id_));
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if (num_arcs_ > 0)
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{
|
||||
mapnik::geometry::multi_line_string<double> multi_line_string;
|
||||
bool hit = false;
|
||||
multi_line_string.reserve(multi_line.rings.size());
|
||||
for (auto const& index : multi_line.rings)
|
||||
{
|
||||
index_type arc_index = index < 0 ? std::abs(index) - 1 : index;
|
||||
if (arc_index >= 0 && arc_index < static_cast<int>(num_arcs_))
|
||||
{
|
||||
hit = true;
|
||||
double px = 0, py = 0;
|
||||
mapnik::geometry::line_string<double> line_string;
|
||||
auto const& arcs = topo_.arcs[arc_index];
|
||||
line_string.reserve(arcs.coordinates.size());
|
||||
for (auto pt : arcs.coordinates)
|
||||
{
|
||||
double x = pt.x;
|
||||
double y = pt.y;
|
||||
if (topo_.tr)
|
||||
{
|
||||
x = (px += x) * (*topo_.tr).scale_x + (*topo_.tr).translate_x;
|
||||
y = (py += y) * (*topo_.tr).scale_y + (*topo_.tr).translate_y;
|
||||
}
|
||||
line_string.add_coord(x, y);
|
||||
}
|
||||
multi_line_string.push_back(std::move(line_string));
|
||||
}
|
||||
}
|
||||
if (hit)
|
||||
{
|
||||
feature->set_geometry(std::move(multi_line_string));
|
||||
assign_properties(*feature, multi_line, tr_);
|
||||
}
|
||||
}
|
||||
return feature;
|
||||
}
|
||||
|
||||
feature_ptr operator() (polygon const& poly) const
|
||||
{
|
||||
mapnik::feature_ptr feature(mapnik::feature_factory::create(ctx_,feature_id_));
|
||||
if (num_arcs_ > 0)
|
||||
{
|
||||
std::vector<mapnik::topojson::coordinate> processed_coords;
|
||||
mapnik::geometry::polygon<double> polygon;
|
||||
if (poly.rings.size() > 1) polygon.interior_rings.reserve(poly.rings.size() - 1);
|
||||
bool first = true;
|
||||
bool hit = false;
|
||||
for (auto const& ring : poly.rings)
|
||||
{
|
||||
mapnik::geometry::linear_ring<double> linear_ring;
|
||||
for (auto const& index : ring)
|
||||
{
|
||||
double px = 0, py = 0;
|
||||
bool reverse = index < 0;
|
||||
index_type arc_index = reverse ? std::abs(index) - 1 : index;
|
||||
if (arc_index >= 0 && arc_index < static_cast<int>(num_arcs_))
|
||||
{
|
||||
hit = true;
|
||||
auto const& arcs = topo_.arcs[arc_index];
|
||||
auto const& coords = arcs.coordinates;
|
||||
processed_coords.clear();
|
||||
processed_coords.reserve(coords.size());
|
||||
for (auto const& pt : coords )
|
||||
{
|
||||
double x = pt.x;
|
||||
double y = pt.y;
|
||||
|
||||
if (topo_.tr)
|
||||
{
|
||||
transform const& tr = *topo_.tr;
|
||||
x = (px += x) * tr.scale_x + tr.translate_x;
|
||||
y = (py += y) * tr.scale_y + tr.translate_y;
|
||||
}
|
||||
processed_coords.emplace_back(coordinate{x,y});
|
||||
}
|
||||
|
||||
if (reverse)
|
||||
{
|
||||
for (auto const& c : processed_coords | boost::adaptors::reversed)
|
||||
{
|
||||
linear_ring.emplace_back(c.x, c.y);
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
for (auto const& c : processed_coords)
|
||||
{
|
||||
linear_ring.emplace_back(c.x, c.y);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
if (first)
|
||||
{
|
||||
first = false;
|
||||
polygon.set_exterior_ring(std::move(linear_ring));
|
||||
}
|
||||
else
|
||||
{
|
||||
polygon.add_hole(std::move(linear_ring));
|
||||
}
|
||||
}
|
||||
if (hit)
|
||||
{
|
||||
mapnik::geometry::correct(polygon);
|
||||
feature->set_geometry(std::move(polygon));
|
||||
assign_properties(*feature, poly, tr_);
|
||||
}
|
||||
}
|
||||
return feature;
|
||||
}
|
||||
|
||||
feature_ptr operator() (multi_polygon const& multi_poly) const
|
||||
{
|
||||
mapnik::feature_ptr feature(mapnik::feature_factory::create(ctx_,feature_id_));
|
||||
if (num_arcs_ > 0)
|
||||
{
|
||||
std::vector<mapnik::topojson::coordinate> processed_coords;
|
||||
mapnik::geometry::multi_polygon<double> multi_polygon;
|
||||
multi_polygon.reserve(multi_poly.polygons.size());
|
||||
bool hit = false;
|
||||
for (auto const& poly : multi_poly.polygons)
|
||||
{
|
||||
bool first = true;
|
||||
mapnik::geometry::polygon<double> polygon;
|
||||
if (poly.size() > 1) polygon.interior_rings.reserve(poly.size() - 1);
|
||||
|
||||
for (auto const& ring : poly)
|
||||
{
|
||||
mapnik::geometry::linear_ring<double> linear_ring;
|
||||
for (auto const& index : ring)
|
||||
{
|
||||
double px = 0, py = 0;
|
||||
bool reverse = index < 0;
|
||||
index_type arc_index = reverse ? std::abs(index) - 1 : index;
|
||||
if (arc_index >= 0 && arc_index < static_cast<int>(num_arcs_))
|
||||
{
|
||||
hit = true;
|
||||
auto const& arcs = topo_.arcs[arc_index];
|
||||
auto const& coords = arcs.coordinates;
|
||||
processed_coords.clear();
|
||||
processed_coords.reserve(coords.size());
|
||||
for (auto const& pt : coords )
|
||||
{
|
||||
double x = pt.x;
|
||||
double y = pt.y;
|
||||
|
||||
if (topo_.tr)
|
||||
{
|
||||
x = (px += x) * (*topo_.tr).scale_x + (*topo_.tr).translate_x;
|
||||
y = (py += y) * (*topo_.tr).scale_y + (*topo_.tr).translate_y;
|
||||
}
|
||||
processed_coords.emplace_back(coordinate{x,y});
|
||||
}
|
||||
|
||||
using namespace boost::adaptors;
|
||||
|
||||
if (reverse)
|
||||
{
|
||||
for (auto const& c : (processed_coords | reversed))
|
||||
{
|
||||
linear_ring.add_coord(c.x, c.y);
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
for (auto const& c : processed_coords)
|
||||
{
|
||||
linear_ring.add_coord(c.x, c.y);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
if (first)
|
||||
{
|
||||
first = false;
|
||||
polygon.set_exterior_ring(std::move(linear_ring));
|
||||
}
|
||||
else
|
||||
{
|
||||
polygon.add_hole(std::move(linear_ring));
|
||||
}
|
||||
}
|
||||
multi_polygon.push_back(std::move(polygon));
|
||||
}
|
||||
if (hit)
|
||||
{
|
||||
mapnik::geometry::correct(multi_polygon);
|
||||
feature->set_geometry(std::move(multi_polygon));
|
||||
assign_properties(*feature, multi_poly, tr_);
|
||||
}
|
||||
}
|
||||
return feature;
|
||||
}
|
||||
|
||||
template<typename T>
|
||||
feature_ptr operator() (T const& ) const
|
||||
{
|
||||
return feature_ptr();
|
||||
}
|
||||
|
||||
Context & ctx_;
|
||||
mapnik::transcoder const& tr_;
|
||||
topology const& topo_;
|
||||
std::size_t num_arcs_;
|
||||
std::size_t feature_id_;
|
||||
};
|
||||
|
||||
}}
|
||||
|
||||
topojson_featureset::topojson_featureset(mapnik::topojson::topology const& topo,
|
||||
mapnik::transcoder const& tr,
|
||||
array_type && index_array)
|
||||
|
|
|
|||
Loading…
Reference in a new issue