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Drop or retain whole multiplier clusters when dropping as needed (#198)

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* Prep to track conditions other than just "dropped" or "kept"

* Count up instead of down

* Drop or retain whole multiplier clusters based on their first feature

* Calculate a global feature dropping sequence

* Switch over to using the drop sequence for drop-fraction

* Remove unused arguments for the old drop-fraction implementation

* Fix copy-and-paste bugs, update tests

* Properly incorporate feature_minzoom into the drop sequence, I hope

* Rename drop_by to drop_sequence

* See if sorting within clusters fixes filter stability between zooms

* Remove very chatty debug print

* Update changelog and version

* Use named constants instead of numbers for feature dropping/keeping

* Add comment to explain purpose and method of bit reversal
This commit is contained in:
Erica Fischer
2024-02-12 10:58:49 -08:00
committed by GitHub
parent e2a7a409c7
commit 4e52cbd957
20 changed files with 7402 additions and 9064 deletions
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serial.cpp
+14 -1
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@@ -709,7 +709,20 @@ int serialize_feature(struct serialization_state *sst, serial_feature &sf, std::
}
}
if (additional[A_DROP_DENSEST_AS_NEEDED] || additional[A_COALESCE_DENSEST_AS_NEEDED] || additional[A_CLUSTER_DENSEST_AS_NEEDED] || additional[A_CALCULATE_FEATURE_DENSITY] || additional[A_DROP_SMALLEST_AS_NEEDED] || additional[A_COALESCE_SMALLEST_AS_NEEDED] || additional[A_INCREASE_GAMMA_AS_NEEDED] || additional[A_GENERATE_POLYGON_LABEL_POINTS] || sst->uses_gamma || cluster_distance != 0) {
if (additional[A_DROP_DENSEST_AS_NEEDED] ||
additional[A_COALESCE_DENSEST_AS_NEEDED] ||
additional[A_CLUSTER_DENSEST_AS_NEEDED] ||
additional[A_CALCULATE_FEATURE_DENSITY] ||
additional[A_DROP_SMALLEST_AS_NEEDED] ||
additional[A_COALESCE_SMALLEST_AS_NEEDED] ||
additional[A_DROP_FRACTION_AS_NEEDED] ||
additional[A_COALESCE_FRACTION_AS_NEEDED] ||
prevent[P_DYNAMIC_DROP] ||
additional[A_INCREASE_GAMMA_AS_NEEDED] ||
additional[A_GENERATE_POLYGON_LABEL_POINTS] ||
sst->uses_gamma ||
retain_points_multiplier > 1 ||
cluster_distance != 0) {
sf.index = bbox_index;
} else {
sf.index = 0;