diff options
Diffstat (limited to 'content')
| -rw-r--r-- | content/geometry/polygon.cpp | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/content/geometry/polygon.cpp b/content/geometry/polygon.cpp index 064d81f..1332a4a 100644 --- a/content/geometry/polygon.cpp +++ b/content/geometry/polygon.cpp @@ -23,14 +23,13 @@ ll windingNumber(pt p, const vector<pt>& poly) { return res; } -// Testet, ob ein Punkt im Polygon liegt (beliebige Polygone). -// Ändere Zeile 32 falls rand zählt, poly[0] == poly.back() +// check if point is inside polygon (any polygon) bool inside(pt p, const vector<pt>& poly) { bool in = false; for (int i = 0; i + 1 < sz(poly); i++) { pt a = poly[i], b = poly[i + 1]; - if (pointOnSegment(a, b, p)) return false; - if (real(a) > real(b)) swap(a,b); + if (pointOnSegment(a, b, p)) return false; // border counts? + if (real(a) > real(b)) swap(a, b); if (real(a) <= real(p) && real(p) < real(b) && cross(p, a, b) < 0) { in ^= 1; |