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Add --buffer-polygons-outward

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This commit is contained in:
Erica Fischer
2023-10-27 22:39:01 -07:00
parent 089be8aff1
commit 6c58ae4162
7 changed files with 84 additions and 75 deletions
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tile.cpp
+7 -13
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@@ -612,7 +612,10 @@ void *partial_feature_worker(void *v) {
int out_detail = (*partials)[i].extra_detail;
drawvec geom = (*partials)[i].geoms[0];
drawvec before_scaling = geom;
if (additional[A_BUFFER_POLYGONS_OUTWARD] && t == VT_POLYGON) {
geom = buffer_poly(geom, (1LL << (32 - z - out_detail)) * sqrt(2) / 2, z, (*partials)[i].tx, (*partials)[i].ty, a->shared_nodes_map, a->nodepos);
}
to_tile_scale(geom, z, out_detail);
@@ -627,19 +630,10 @@ void *partial_feature_worker(void *v) {
check_polygon(geom);
}
if (true || geom.size() < 4) {
if (geom.size() < 4) {
if (area > 0) {
// Try reviving the polygon by buffering it outward a little
geom = buffer_poly(before_scaling, (1LL << (32 - z - out_detail)) * 2.0);
to_tile_scale(geom, z, out_detail);
geom = clean_or_clip_poly(geom, 0, 0, false, true);
if (geom.size() < 4) {
// OK, that didn't work, make a placeholder
// area is in world coordinates, calculated before scaling down
geom = revive_polygon(before, area, z, out_detail);
}
// area is in world coordinates, calculated before scaling down
geom = revive_polygon(before, area, z, out_detail);
} else {
geom.clear();
}