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Send dot-dropping through the same pipeline.

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The first feature in a tile can never be dropped, since there is
no previous feature to attach its properties to.

Remove the previous special case that reset the dropping counter
at the first feature within each tile proper (as opposed to the
first feature in each tile, including its buffer, which is now
the one that is guaranteed to be preserved).
This commit is contained in:
Eric Fischer
2018-02-23 17:19:54 -08:00
parent 7fe0c87806
commit a8a342f701
42 changed files with 18490 additions and 18041 deletions
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main.cpp
-19
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@@ -223,25 +223,6 @@ int calc_feature_minzoom(struct index *ix, struct drop_state *ds, int maxzoom, d
(additional[A_LINE_DROP] && ix->t == VT_LINE) ||
(additional[A_POLYGON_DROP] && ix->t == VT_POLYGON))) {
for (ssize_t i = maxzoom; i >= 0; i--) {
// XXX This resets the feature counter at the start of each tile,
// which makes the feature count come out close to what it is if
// feature dropping happens during tiling. It means that the low
// zooms are heavier than they legitimately should be though.
{
unsigned xxx = 0, yyy = 0;
if (i != 0) {
xxx = xx >> (32 - i);
yyy = yy >> (32 - i);
}
if (ds[i].x != xxx || ds[i].y != yyy) {
ds[i].seq = 0;
ds[i].gap = 0;
ds[i].previndex = 0;
}
ds[i].x = xxx;
ds[i].y = yyy;
}
ds[i].seq++;
}
for (ssize_t i = maxzoom; i >= 0; i--) {