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Fix post-binning clipping

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This commit is contained in:
Erica Fischer
2024-11-19 09:19:44 -08:00
parent 08f9d0d71d
commit 30e5a5ce9b
3 changed files with 72 additions and 4 deletions
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clip.cpp
+14 -4
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@@ -1348,16 +1348,26 @@ static bool feature_out(std::vector<tile_feature> const &features, mvt_layer &ou
}
if (clipbboxes.size() != 0) {
// bounding box is in world coordinates at world scale
// feature is in local coordinates at tile scale
long long dx = (long long) nx << (32 - nz);
long long dy = (long long) ny << (32 - nz);
double scale = (double) outlayer.extent / (1LL << (32 - nz));
for (auto const &c : clipbboxes) {
clipbbox local;
local.minx = std::llround((c.minx - dx) * scale);
local.miny = std::llround((c.miny - dy) * scale);
local.maxx = std::llround((c.maxx - dx) * scale);
local.maxy = std::llround((c.maxy - dy) * scale);
for (auto &c : clipbboxes) {
if (t == VT_POLYGON) {
geom = simple_clip_poly(geom, c.minx - dx, c.miny - dy, c.maxx - dx, c.maxy - dy, false);
geom = simple_clip_poly(geom, local.minx, local.miny, local.maxx, local.maxy, false);
} else if (t == VT_LINE) {
geom = clip_lines(geom, c.minx - dx, c.miny - dy, c.maxx - dx, c.maxy - dy);
geom = clip_lines(geom, local.minx, local.miny, local.maxx, local.maxy);
} else if (t == VT_POINT) {
geom = clip_point(geom, c.minx - dx, c.miny - dy, c.maxx - dx, c.maxy - dy);
geom = clip_point(geom, local.minx, local.miny, local.maxx, local.maxy);
}
}