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#include <mbgl/map/annotation.hpp>
#include <mbgl/map/map.hpp>
#include <mbgl/util/ptr.hpp>
#include <algorithm>
#include <memory>
using namespace mbgl;
Annotation::Annotation(AnnotationType type_, std::vector<AnnotationSegment> geometry_)
: type(type_),
geometry(geometry_) {
if (type == AnnotationType::Point) {
bounds = LatLngBounds(getPoint(), getPoint());
} else {
for (auto segment : geometry) {
for (auto point : segment) {
bounds.extend(point);
}
}
}
}
LatLng Annotation::getPoint() const {
return geometry[0][0];
}
AnnotationManager::AnnotationManager()
: nullTile(util::make_unique<LiveTile>()) {}
vec2<double> AnnotationManager::projectPoint(LatLng& point) {
double sine = std::sin(point.latitude * M_PI / 180);
double x = point.longitude / 360 + 0.5;
double y = 0.5 - 0.25 * std::log((1 + sine) / (1 - sine)) / M_PI;
return vec2<double>(x, y);
}
std::pair<std::vector<Tile::ID>, std::vector<uint32_t>> AnnotationManager::addPointAnnotations(std::vector<LatLng> points, std::vector<std::string>& symbols, const Map& map) {
uint16_t extent = 4096;
std::vector<uint32_t> annotationIDs(points.size());
std::vector<Tile::ID> affectedTiles;
for (uint32_t i = 0; i < points.size(); ++i) {
uint32_t annotationID = nextID();
auto anno_it = annotations.emplace(annotationID, util::make_unique<Annotation>(AnnotationType::Point, std::vector<AnnotationSegment>({{ points[i] }})));
uint8_t maxZoom = map.getMaxZoom();
uint32_t z2 = 1 << maxZoom;
vec2<double> p = projectPoint(points[i]);
uint32_t x = p.x * z2;
uint32_t y = p.y * z2;
for (int8_t z = maxZoom; z >= 0; z--) {
affectedTiles.emplace_back(z, x, y);
Tile::ID tileID = affectedTiles.back();
Coordinate coordinate(extent * (p.x * z2 - x), extent * (p.y * z2 - y));
GeometryCollection geometries({{ {{ coordinate }} }});
std::map<std::string, std::string> properties = {{ "sprite", (symbols[i].length() ? symbols[i] : defaultPointAnnotationSymbol) }};
auto feature = std::make_shared<const LiveTileFeature>(FeatureType::Point,
geometries,
properties);
auto tile_it = annotationTiles.find(tileID);
if (tile_it != annotationTiles.end()) {
// get point layer & add feature
auto layer = tile_it->second.second->getMutableLayer(util::ANNOTATIONS_POINTS_LAYER_ID);
layer->addFeature(feature);
// record annotation association with tile
tile_it->second.first.push_back(annotationID);
} else {
// create point layer & add feature
util::ptr<LiveTileLayer> layer = std::make_shared<LiveTileLayer>();
layer->addFeature(feature);
// create tile & record annotation association
auto tile_pos = annotationTiles.emplace(tileID, std::make_pair(std::vector<uint32_t>({ annotationID }), util::make_unique<LiveTile>()));
// add point layer to tile
tile_pos.first->second.second->addLayer(util::ANNOTATIONS_POINTS_LAYER_ID, layer);
}
// record annotation association with tile feature
anno_it.first->second->tileFeatures.emplace(tileID, std::vector<std::weak_ptr<const LiveTileFeature>>({ feature }));
z2 /= 2;
x /= 2;
y /= 2;
}
annotationIDs.push_back(annotationID);
}
return std::make_pair(affectedTiles, annotationIDs);
}
std::vector<Tile::ID> AnnotationManager::removeAnnotations(std::vector<uint32_t> ids) {
std::vector<Tile::ID> affectedTiles;
for (auto& annotationID : ids) {
auto annotation_it = annotations.find(annotationID);
if (annotation_it != annotations.end()) {
auto& annotation = annotation_it->second;
for (auto& tile_it : annotationTiles) {
auto features_it = annotation->tileFeatures.find(tile_it.first);
if (features_it != annotation->tileFeatures.end()) {
auto layer = tile_it.second.second->getMutableLayer(util::ANNOTATIONS_POINTS_LAYER_ID);
auto& features = features_it->second;
layer->removeFeature(features[0]);
affectedTiles.push_back(tile_it.first);
}
}
annotations.erase(annotationID);
}
}
return affectedTiles;
}
std::vector<uint32_t> AnnotationManager::getAnnotationsInBounds(LatLngBounds queryBounds, const Map& map) const {
uint8_t z = map.getMaxZoom();
uint32_t z2 = 1 << z;
vec2<double> swPoint = projectPoint(queryBounds.sw);
vec2<double> nePoint = projectPoint(queryBounds.ne);
// tiles number y from top down
Tile::ID nwTile(z, swPoint.x * z2, nePoint.y * z2);
Tile::ID seTile(z, nePoint.x * z2, swPoint.y * z2);
std::vector<uint32_t> matchingAnnotations;
for (auto& tile : annotationTiles) {
Tile::ID id = tile.first;
if (id.z == z) {
if (id.x >= nwTile.x && id.x <= seTile.x && id.y >= nwTile.y && id.y <= seTile.y) {
if (id.x > nwTile.x && id.x < seTile.x && id.y > nwTile.y && id.y < seTile.y) {
// trivial accept; grab all of the tile's annotations
std::copy(tile.second.first.begin(), tile.second.first.end(), std::back_inserter(matchingAnnotations));
} else {
// check tile's annotations' bounding boxes
std::copy_if(tile.second.first.begin(), tile.second.first.end(),
std::back_inserter(matchingAnnotations), [&](const uint32_t annotationID) -> bool {
LatLngBounds annoBounds = this->annotations.find(annotationID)->second->getBounds();
return (annoBounds.sw.latitude >= queryBounds.sw.latitude &&
annoBounds.ne.latitude <= queryBounds.ne.latitude &&
annoBounds.sw.longitude >= queryBounds.sw.longitude &&
annoBounds.ne.longitude <= queryBounds.ne.longitude);
});
}
}
}
}
return matchingAnnotations;
}
LatLngBounds AnnotationManager::getBoundsForAnnotations(std::vector<uint32_t> ids) const {
LatLngBounds bounds;
for (auto id : ids) {
auto annotation_it = annotations.find(id);
if (annotation_it != annotations.end()) {
bounds.extend(annotation_it->second->getPoint());
}
}
return bounds;
}
const std::unique_ptr<LiveTile>& AnnotationManager::getTile(Tile::ID const& id) {
std::lock_guard<std::mutex> lock(mtx);
auto tile_it = annotationTiles.find(id);
if (tile_it != annotationTiles.end()) {
return tile_it->second.second;
}
return nullTile;
}
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