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Externalizing polygon shard detection (#146)

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* Start of externalizing polygon shard detection

* Completely untested external quicksort

* Add unit test for external quicksort

* Remember to clean up temporary files

* Sort and scan the vertices

* Bring over more vertex logic

* Make nodes from vertices

* Checkpoint on switching over to global shared nodes

* Do the thing

* Revert unintended change to coalesced linestring behavior

* Take shared nodes into account in early simplification

* Let it do more sorting in memory

* Fix overnoding of collinear linestrings

* Remove duplicate nodes, since only duplicate vertices now matter

* Remember to delete temporary files

* Fix out of bounds memory access below, apparently

* Fix the actual undefined behavior

* Still running out of memory in one case. Find out where.

* Forgot the conditional

* Try again to make it not run out of memory

* Update version and changelog
This commit is contained in:
Erica Fischer
2023-10-03 10:53:12 -07:00
committed by GitHub
parent dcc3a11915
commit 26bf08deb2
18 changed files with 713 additions and 230 deletions
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geometry.hpp
+5 -1
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@@ -48,6 +48,10 @@ struct draw {
}
}
bool operator>(draw const &s) const {
return s < *this;
}
bool operator==(draw const &s) const {
return y == s.y && x == s.x;
}
@@ -73,7 +77,7 @@ drawvec clip_lines(drawvec &geom, int z, long long buffer);
drawvec stairstep(drawvec &geom, int z, int detail);
bool point_within_tile(long long x, long long y, int z);
int quick_check(long long *bbox, int z, long long buffer);
drawvec simplify_lines(drawvec &geom, int z, int detail, bool mark_tile_bounds, double simplification, size_t retain, drawvec const &shared_nodes);
drawvec simplify_lines(drawvec &geom, int z, int tx, int ty, int detail, bool mark_tile_bounds, double simplification, size_t retain, drawvec const &shared_nodes, struct node *shared_nodes_map, size_t nodepos);
drawvec reorder_lines(drawvec &geom);
drawvec fix_polygon(drawvec &geom);
std::vector<drawvec> chop_polygon(std::vector<drawvec> &geoms);