/// <summary>
/// Returns all edges to the right when crossing from edge 'source' through this vertex towards edge 'destination'
/// </summary>
/// <param name="source"></param>
/// <param name="destination"></param>
/// <returns></returns>
public IEnumerable <Edge> GetRightCrossings(Edge source, Edge destination)
{
var deltaSource = (source.GetOtherEnd(this).Location - this.Location);
var deltaDestination = (destination.GetOtherEnd(this).Location - this.Location);
double angleSource = Math.Atan2(deltaSource.Y, deltaSource.X);
double angleDestination = Math.Atan2(deltaDestination.Y, deltaDestination.X);
if (angleDestination < angleSource)
{
angleDestination += Math.PI * 2;
}
foreach (var edge in Edges.Where(e => e != source && e != destination))
{
var deltaEdge = (edge.GetOtherEnd(this).Location - this.Location);
double angleEdge = Math.Atan2(deltaEdge.Y, deltaEdge.X);
if (angleEdge < angleSource)
{
angleEdge += Math.PI * 2;
}
if (angleEdge < angleDestination)
{
yield return(edge);
}
}
}
public double AngleBetween(Edge source, Edge destination)
{
var deltaSource = (this.Location - source.GetOtherEnd(this).Location);
var deltaDestination = (destination.GetOtherEnd(this).Location - this.Location);
//return Vector2.AngleBetween(deltaSource, deltaDestination);
return(0f);
}