public void GeneratePolygons(List <StopPath> paths)
{
foreach (StopPath path in paths)
{
path.Polygons = new List <Polygon>();
for (int i = 0; i < path.Path.Count - 1; i++)
{
double bearing = path.Path[i].GetBearingTo(path.Path[i + 1]);
Coordinate x1 = path.Path[i].AddDistanceAtBearing(5, bearing + 90);
Coordinate y1 = path.Path[i].AddDistanceAtBearing(5, bearing - 90);
Coordinate y2 = path.Path[i + 1].AddDistanceAtBearing(5, bearing - 90);
Coordinate x2 = path.Path[i + 1].AddDistanceAtBearing(5, bearing + 90);
path.Polygons.Add(new Polygon(x1, y1, y2, x2, Coordinate.DegreesToCardinal(bearing)));
//handle extremely sharp corners
if (i < path.Path.Count - 2)
{
double cornerBearing = Math.Abs(bearing - path.Path[i + 1].GetBearingTo(path.Path[i + 2]));
if ((cornerBearing >= 75 && cornerBearing <= 105) || (cornerBearing >= 255 && cornerBearing <= 285))
{
Coordinate mergedPoint = path.Path[i + 1].AddDistanceAtBearing(5, bearing);
Polygon cornerPolygon = new Polygon(
path.Path[i + 1].AddDistanceAtBearing(5, bearing + 90),
path.Path[i + 1].AddDistanceAtBearing(5, bearing - 90),
mergedPoint.AddDistanceAtBearing(5, bearing - 90),
mergedPoint.AddDistanceAtBearing(5, bearing + 90)
);
path.Polygons.Add(cornerPolygon);
}
}
}
}
}