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Still looks terrible, but make segment shortening work again

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This commit is contained in:
Eric Fischer 2014-10-01 11:09:35 -07:00
parent b292b66a7c
commit 6922a57aea
1 changed files with 9 additions and 21 deletions
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30
tile.cc
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@ -230,36 +230,24 @@ drawvec remove_noop(drawvec geom, int type) {
return out;
}
int shrink_lines(struct draw *geom, int len, int z, int basezoom) {
drawvec shrink_lines(drawvec &geom, int z, int basezoom) {
double scale = 1.0 / exp(log(sqrt(2.5)) * (basezoom - z));
struct draw tmp[3 * len];
int out = 0;
int i;
unsigned i;
drawvec out;
for (i = 0; i < len; i++) {
for (i = 0; i < geom.size(); i++) {
if (i > 0 && (geom[i - 1].op == VT_MOVETO || geom[i - 1].op == VT_LINETO) && geom[i].op == VT_LINETO) {
long long cx = (geom[i].x + geom[i - 1].x) / 2;
long long cy = (geom[i].y + geom[i - 1].y) / 2;
tmp[out + 0].op = VT_MOVETO;
tmp[out + 0].x = cx + (geom[i - 1].x - cx) * scale;
tmp[out + 0].y = cy + (geom[i - 1].y - cy) * scale;
tmp[out + 1].op = VT_LINETO;
tmp[out + 1].x = cx + (geom[i].x - cx) * scale;
tmp[out + 1].y = cy + (geom[i].y - cy) * scale;
tmp[out + 2].op = VT_MOVETO;
tmp[out + 2].x = geom[i].x;
tmp[out + 2].y = geom[i].y;
out += 3;
out.push_back(draw(VT_MOVETO, cx + (geom[i - 1].x - cx) * scale, cy + (geom[i - 1].y - cy) * scale));
out.push_back(draw(VT_LINETO, cx + (geom[i].x - cx) * scale, cy + (geom[i].y - cy) * scale));
out.push_back(draw(VT_MOVETO, geom[i].x, geom[i].y));
} else {
tmp[out++] = geom[i];
out.push_back(geom[i]);
}
}
memcpy(geom, tmp, out * sizeof(struct draw));
return out;
}
@ -544,7 +532,7 @@ long long write_tile(struct index *start, struct index *end, char *metabase, uns
#if 0
if (t == VT_LINE && z != basezoom) {
len = shrink_lines(geom, len, z, basezoom);
geom = shrink_lines(geom, z, basezoom);
}
#endif