// If two lines intersect, they form two angles that face each other
public static bool Intersects(this LineSegment a, LineSegment b)
{
if (a.Start == b.Start || a.Start == b.End ||
a.End == b.Start || a.End == b.End)
{ return false; }// We don't count sharing a corner as intersecting
return // else, draw some pretend triangles and see where they are pointing
Orient(a.Start, a.End, b.Start) != Orient(a.Start, a.End, b.End)
&& Orient(b.Start, b.End, a.Start) != Orient(b.Start, b.End, a.End);
}
// create new line segment from point to point, get angle
public static double GetClockwise(this LineSegment active, LineSegment passive)
{
var anglea = active.Angle();
var angleb = passive.Angle();
return (angleb > anglea) ? angleb - anglea : (360 - anglea) + angleb;
}
