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#pragma once
#include <mapbox/geojsonvt/clip.hpp>
#include <mapbox/geojsonvt/types.hpp>
namespace mapbox {
namespace geojsonvt {
namespace detail {
inline void shiftCoords(vt_features& features, double offset) {
for (auto& feature : features) {
mapbox::geometry::for_each_point(feature.geometry,
[offset](vt_point& point) { point.x += offset; });
feature.bbox.min.x += offset;
feature.bbox.max.x += offset;
}
}
inline vt_features wrap(const vt_features& features, double buffer) {
// left world copy
auto left = clip<0>(features, -1 - buffer, buffer, -1, 2);
// right world copy
auto right = clip<0>(features, 1 - buffer, 2 + buffer, -1, 2);
if (left.empty() && right.empty())
return features;
// center world copy
auto merged = clip<0>(features, -buffer, 1 + buffer, -1, 2);
if (!left.empty()) {
// merge left into center
shiftCoords(left, 1.0);
merged.insert(merged.begin(), left.begin(), left.end());
}
if (!right.empty()) {
// merge right into center
shiftCoords(right, -1.0);
merged.insert(merged.end(), right.begin(), right.end());
}
return merged;
}
} // namespace detail
} // namespace geojsonvt
} // namespace mapbox
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