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Calculate an antimeridian-adjusted bounding box in tileset metadata (#82)

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* Calculate a new antimeridian-adjusted bounding box

* Add antimeridian bounding box to pmtiles, dirtiles, and tile-join

* Don't take out-of-bounds latitudes into account in the adjusted bbox

* Update changelog

* Forgot to adjust tests after the last change
This commit is contained in:
Erica Fischer
2023-03-09 20:26:48 -08:00
committed by GitHub
parent 329dd86bfd
commit afc7ca01a2
195 changed files with 297 additions and 13 deletions
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serial.cpp
+28
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@@ -402,6 +402,34 @@ int serialize_feature(struct serialization_state *sst, serial_feature &sf) {
sf.bbox[2] = LLONG_MIN;
sf.bbox[3] = LLONG_MIN;
for (size_t i = 0; i < sf.geometry.size(); i++) {
if (sf.geometry[i].op == VT_MOVETO || sf.geometry[i].op == VT_LINETO) {
if (sf.geometry[i].y > 0 && sf.geometry[i].y < 0xFFFFFFFF) {
// standard -180 to 180 world plane
long long x = sf.geometry[i].x & 0xFFFFFFFF;
long long y = sf.geometry[i].y & 0xFFFFFFFF;
r->file_bbox1[0] = std::min(r->file_bbox1[0], x);
r->file_bbox1[1] = std::min(r->file_bbox1[1], y);
r->file_bbox1[2] = std::max(r->file_bbox1[2], x);
r->file_bbox1[3] = std::max(r->file_bbox1[3], y);
// printf("%llx,%llx %llx,%llx %llx,%llx ", x, y, r->file_bbox1[0], r->file_bbox1[1], r->file_bbox1[2], r->file_bbox1[3]);
// shift the western hemisphere 360 degrees to the east
if (x < 0x80000000) { // prime meridian
x += 0x100000000;
}
r->file_bbox2[0] = std::min(r->file_bbox2[0], x);
r->file_bbox2[1] = std::min(r->file_bbox2[1], y);
r->file_bbox2[2] = std::max(r->file_bbox2[2], x);
r->file_bbox2[3] = std::max(r->file_bbox2[3], y);
}
}
}
// try to remind myself that the geometry in this function is in SCALED COORDINATES
drawvec scaled_geometry = sf.geometry;
sf.geometry.clear();