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