private static int Wind(AZGeoPoint location, AZEdge edge, Position position)
{
if (edge.RelativePositionOf(location) != position)
{
return(0);
}
return(1);
}
private static int DescendingIntersection(AZGeoPoint location, AZEdge edge)
{
if (edge.AscendingRelativeTo(location))
{
return(0);
}
if (!edge.LocationInRange(location, Orientation.Descending))
{
return(0);
}
return(Wind(location, edge, Position.Right));
}
public bool Contains(AZGeoPoint location)
{
//AZGeoPoint[] polygonPointsWithClosure = PolygonPointsWithClosure();
int windingNumber = 0;
for (int pointIndex = 0; pointIndex < _pointsWithClosure.Length - 1; pointIndex++)
{
//AZEdge edge = new AZEdge(_pointsWithClosure.Span[pointIndex], _pointsWithClosure.Span[pointIndex + 1]);
AZEdge edge = new AZEdge(_pointsWithClosure[pointIndex], _pointsWithClosure[pointIndex + 1]);
windingNumber += AscendingIntersection(location, edge);
windingNumber -= DescendingIntersection(location, edge);
}
return(windingNumber != 0);
}
