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Clipping is faster with only one duplicate/shifted geometry copy

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This commit is contained in:
Eric Fischer 2015-12-08 16:57:04 -08:00
parent dace304182
commit 256139b385
1 changed files with 10 additions and 4 deletions
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14
tile.cc
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@ -550,11 +550,17 @@ long long write_tile(char **geoms, char *metabase, char *stringpool, int z, unsi
// shifted by 360 degrees, and then make sure both copies get clipped down to size.
unsigned n = geom.size();
for (unsigned i = 0; i < n; i++) {
geom.push_back(draw(geom[i].op, geom[i].x - (1LL << 32), geom[i].y));
if (bbox[0] < 0) {
for (unsigned i = 0; i < n; i++) {
geom.push_back(draw(geom[i].op, geom[i].x + (1LL << 32), geom[i].y));
}
}
for (unsigned i = 0; i < n; i++) {
geom.push_back(draw(geom[i].op, geom[i].x + (1LL << 32), geom[i].y));
if (bbox[2] > 1LL << 32) {
for (unsigned i = 0; i < n; i++) {
geom.push_back(draw(geom[i].op, geom[i].x - (1LL << 32), geom[i].y));
}
}
bbox[0] = 0;