diegoripley/tippecanoe
1
0
Fork 0
mirror of https://github.com/felt/tippecanoe.git synced 2026-10-02 08:25:40 +02:00
Code Issues Packages Projects Releases Wiki Activity

Add --use-source-polygon-winding and --reverse-source-polygon-winding

Browse Source
This commit is contained in:
Eric Fischer
2018-06-01 12:59:28 -07:00
parent 38bca4a179
commit 48486b5d7b
11 changed files with 104 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files
geometry.cpp
+16 -2
View File
@@ -19,6 +19,7 @@
#include "projection.hpp"
#include "serial.hpp"
#include "main.hpp"
#include "options.hpp"
static int pnpoly(drawvec &vert, size_t start, size_t nvert, long long testx, long long testy);
static int clip(double *x0, double *y0, double *x1, double *y1, double xmin, double ymin, double xmax, double ymax);
@@ -912,8 +913,21 @@ drawvec fix_polygon(drawvec &geom) {
// Reverse ring if winding order doesn't match
// inner/outer expectation
double area = get_area(ring, 0, ring.size());
if ((area > 0) != outer) {
bool reverse_ring = false;
if (prevent[P_USE_SOURCE_POLYGON_WINDING]) {
// GeoJSON winding is reversed from vector winding
reverse_ring = true;
} else if (prevent[P_REVERSE_SOURCE_POLYGON_WINDING]) {
// GeoJSON winding is reversed from vector winding
reverse_ring = false;
} else {
double area = get_area(ring, 0, ring.size());
if ((area > 0) != outer) {
reverse_ring = true;
}
}
if (reverse_ring) {
drawvec tmp;
for (int a = ring.size() - 1; a >= 0; a--) {
tmp.push_back(ring[a]);