protected void AddPolylineLocations(PathFigureCollection pathFigures, IEnumerable <Location> locations, double longitudeOffset, bool closed)
{
if (locations.Count() >= 2)
{
var points = locations.Select(location => LocationToView(location, longitudeOffset)).ToList();
if (closed)
{
points.Add(points[0]);
}
var viewport = new Rect(0, 0, ParentMap.RenderSize.Width, ParentMap.RenderSize.Height);
PathFigure figure = null;
PolyLineSegment segment = null;
for (int i = 1; i < points.Count; i++)
{
var p1 = points[i - 1];
var p2 = points[i];
var inside = Intersections.GetIntersections(ref p1, ref p2, viewport);
if (inside)
{
if (figure == null)
{
figure = new PathFigure
{
StartPoint = p1,
IsClosed = false,
IsFilled = false
};
segment = new PolyLineSegment();
figure.Segments.Add(segment);
pathFigures.Add(figure);
}
segment.Points.Add(p2);
}
if (!inside || p2 != points[i])
{
figure = null;
}
}
}
}