diegoripley/tippecanoe
1
0
Fork 0
mirror of https://github.com/felt/tippecanoe.git synced 2026-10-02 16:35:40 +02:00
Code Issues Packages Projects Releases Wiki Activity

Add --clip-bounding-box option to clip input geometry

Browse Source
This commit is contained in:
Eric Fischer
2018-10-22 16:49:33 -07:00
parent 0acdeef525
commit 5dfbc4a281
12 changed files with 199 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files
geometry.cpp
+14 -6
View File
@@ -595,16 +595,20 @@ drawvec reduce_tiny_poly(drawvec &geom, int z, int detail, bool *reduced, double
}
drawvec clip_point(drawvec &geom, int z, long long buffer) {
drawvec out;
long long min = 0;
long long area = 1LL << (32 - z);
min -= buffer * area / 256;
area += buffer * area / 256;
return clip_point(geom, min, min, area, area);
}
drawvec clip_point(drawvec &geom, long long minx, long long miny, long long maxx, long long maxy) {
drawvec out;
for (size_t i = 0; i < geom.size(); i++) {
if (geom[i].x >= min && geom[i].y >= min && geom[i].x <= area && geom[i].y <= area) {
if (geom[i].x >= minx && geom[i].y >= miny && geom[i].x <= maxx && geom[i].y <= maxy) {
out.push_back(geom[i]);
}
}
@@ -646,13 +650,17 @@ bool point_within_tile(long long x, long long y, int z) {
}
drawvec clip_lines(drawvec &geom, int z, long long buffer) {
drawvec out;
long long min = 0;
long long area = 1LL << (32 - z);
min -= buffer * area / 256;
area += buffer * area / 256;
return clip_lines(geom, min, min, area, area);
}
drawvec clip_lines(drawvec &geom, long long minx, long long miny, long long maxx, long long maxy) {
drawvec out;
for (size_t 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) {
double x1 = geom[i - 1].x;
@@ -661,7 +669,7 @@ drawvec clip_lines(drawvec &geom, int z, long long buffer) {
double x2 = geom[i - 0].x;
double y2 = geom[i - 0].y;
int c = clip(&x1, &y1, &x2, &y2, min, min, area, area);
int c = clip(&x1, &y1, &x2, &y2, minx, miny, maxx, maxy);
if (c > 1) { // clipped
out.push_back(draw(VT_MOVETO, x1, y1));