Import Geant4 10.4.0 source tree

2017-12-08 12:52:30 +01:00
parent 98e455a940
commit fc6af9e721
2166 changed files with 276760 additions and 100873 deletions
@@ -144,6 +144,26 @@ G4bool G4GeomTools::PointInTriangle(const G4TwoVector& A,
  return true;
 }

+///////////////////////////////////////////////////////////////////////
+//
+// Point inside 2D polygon
+
+G4bool G4GeomTools::PointInPolygon(const G4TwoVector& p,
+                                   const G4TwoVectorList& v)
+{
+  G4int Nv = v.size();
+  G4bool in = false;
+  for (G4int i = 0, k = Nv - 1; i < Nv; k = i++)
+  {
+    if ((v[i].y() > p.y()) != (v[k].y() > p.y()))
+    {
+      G4double ctg = (v[k].x()-v[i].x())/(v[k].y()-v[i].y());
+      in ^= (p.x() < (p.y()-v[i].y())*ctg + v[i].x());
+    }
+  }
+  return in;
+}
+
 ///////////////////////////////////////////////////////////////////////
 //
 // Detemine whether 2D polygon is convex or not