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Drop linetos smaller than tile resolution before doing normal simplification

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Since simplification is rather expensive
This commit is contained in:
Eric Fischer
2015-07-01 12:16:50 -07:00
parent af13a95dc1
commit 18cdcb0732
3 changed files with 13 additions and 9 deletions
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geometry.cc
+5 -5
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@@ -84,7 +84,7 @@ void to_tile_scale(drawvec &geom, int z, int detail) {
}
}
drawvec remove_noop(drawvec geom, int type) {
drawvec remove_noop(drawvec geom, int type, int shift) {
// first pass: remove empty linetos
long long x = 0, y = 0;
@@ -92,7 +92,7 @@ drawvec remove_noop(drawvec geom, int type) {
unsigned i;
for (i = 0; i < geom.size(); i++) {
if (geom[i].op == VT_LINETO && geom[i].x == x && geom[i].y == y) {
if (geom[i].op == VT_LINETO && (geom[i].x >> shift) == x && (geom[i].y >> shift) == y) {
continue;
}
@@ -100,8 +100,8 @@ drawvec remove_noop(drawvec geom, int type) {
out.push_back(geom[i]);
} else { /* moveto or lineto */
out.push_back(geom[i]);
x = geom[i].x;
y = geom[i].y;
x = geom[i].x >> shift;
y = geom[i].y >> shift;
}
}
@@ -137,7 +137,7 @@ drawvec remove_noop(drawvec geom, int type) {
for (i = 0; i < geom.size(); i++) {
if (geom[i].op == VT_MOVETO) {
if (i > 0 && geom[i - 1].op == VT_LINETO && geom[i - 1].x == geom[i].x && geom[i - 1].y == geom[i].y) {
if (i > 0 && geom[i - 1].op == VT_LINETO && (geom[i - 1].x >> shift) == (geom[i].x >> shift) && (geom[i - 1].y >> shift) == (geom[i].y >> shift)) {
continue;
}
}