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#include <mbgl/annotation/shape_annotation_impl.hpp>
#include <mbgl/annotation/annotation_tile.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;
namespace geojsonvt = mapbox::geojsonvt;
ShapeAnnotationImpl::ShapeAnnotationImpl(const AnnotationID id_, const uint8_t maxZoom_)
: id(id_),
maxZoom(maxZoom_),
layerID("com.mapbox.annotations.shape." + util::toString(id)) {
}
void ShapeAnnotationImpl::updateTileData(const CanonicalTileID& tileID, AnnotationTileData& data) {
static const double baseTolerance = 4;
if (!shapeTiler) {
mapbox::geometry::feature_collection<double> features;
features.emplace_back(ShapeAnnotationGeometry::visit(geometry(), [] (auto&& geom) {
return Feature { std::move(geom) };
}));
mapbox::geojsonvt::Options options;
options.maxZoom = util::clamp<uint8_t>(maxZoom, 0, 18);
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;
AnnotationTileLayer& layer = *data.layers.emplace(layerID,
std::make_unique<AnnotationTileLayer>(layerID)).first->second;
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.features.emplace_back(
std::make_shared<AnnotationTileFeature>(featureType, renderGeometry));
}
}
} // namespace mbgl
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