59 lines
2.1 KiB
C++
59 lines
2.1 KiB
C++
#include <mbgl/annotation/shape_annotation_impl.hpp>
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#include <mbgl/annotation/annotation_tile.hpp>
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#include <mbgl/annotation/annotation_manager.hpp>
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#include <mbgl/tile/tile_id.hpp>
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#include <mbgl/math/wrap.hpp>
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#include <mbgl/math/clamp.hpp>
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#include <mbgl/util/string.hpp>
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#include <mbgl/util/constants.hpp>
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#include <mbgl/util/geometry.hpp>
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namespace mbgl {
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using namespace style;
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ShapeAnnotationImpl::ShapeAnnotationImpl(const AnnotationID id_)
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: id(id_),
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layerID(AnnotationManager::ShapeLayerID + util::toString(id)) {}
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void ShapeAnnotationImpl::updateTileData(const CanonicalTileID& tileID, AnnotationTileData& data) {
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static const double baseTolerance = 4;
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if (!shapeTiler) {
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mapbox::feature::feature_collection<double> features;
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features.emplace_back(ShapeAnnotationGeometry::visit(
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geometry(), [](auto&& geom) { return Feature{std::forward<decltype(geom)>(geom)}; }));
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mapbox::geojsonvt::Options options;
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// The annotation source is currently hard coded to maxzoom 16, so we're
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// topping out at z16 here as well.
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options.maxZoom = 16;
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options.buffer = 255u;
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options.extent = util::EXTENT;
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options.tolerance = baseTolerance;
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shapeTiler = std::make_unique<mapbox::geojsonvt::GeoJSONVT>(features, options);
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}
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const auto& shapeTile = shapeTiler->getTile(tileID.z, tileID.x, tileID.y);
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if (shapeTile.features.empty()) return;
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auto layer = data.addLayer(layerID);
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ToGeometryCollection toGeometryCollection;
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ToFeatureType toFeatureType;
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for (const auto& shapeFeature : shapeTile.features) {
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FeatureType featureType = apply_visitor(toFeatureType, shapeFeature.geometry);
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GeometryCollection renderGeometry = apply_visitor(toGeometryCollection, shapeFeature.geometry);
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assert(featureType != FeatureType::Unknown);
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// https://github.com/mapbox/geojson-vt-cpp/issues/44
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if (featureType == FeatureType::Polygon) {
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renderGeometry = fixupPolygons(renderGeometry);
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}
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layer->addFeature(id, featureType, renderGeometry);
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}
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}
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} // namespace mbgl
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