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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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unit.cpp
+6
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@@ -99,3 +99,9 @@ TEST_CASE("Tile-join cache", "tile cache") {
REQUIRE(tc.overzoom_cache.size() == 5);
REQUIRE(tc.overzoom_cache.find(zxy(11, 5, 8)) == tc.overzoom_cache.end());
}
TEST_CASE("Bit reversal", "bit reversal") {
REQUIRE(bit_reverse(1) == 0x8000000000000000);
REQUIRE(bit_reverse(0x1234567812489BCF) == 0xF3D912481E6A2C48);
REQUIRE(bit_reverse(0xF3D912481E6A2C48) == 0x1234567812489BCF);
}