public static List <LineSeg> Cut(LineSeg l1, LineSeg l2, Vector2 i)
{
List <LineSeg> line = new List <LineSeg>();
l1.Cut(i, out LineSeg i1, out LineSeg i2);
line.Add(i1);
line.Add(i2);
l2.Cut(i, out i1, out i2);
line.Add(i1);
line.Add(i2);
return(line);
}
public static bool IsIntersect(LineSeg l1, LineSeg l2, out Vector2 i)
{
//if (l1.IsConnectedWith(l2))
//{
// i = new Vector2();
// return false;
//}
Vector2 s1 = l1.P2 - l1.P1;
Vector2 s2 = l2.P2 - l2.P1;
float s = (-s1.Y * (l1.P1.X - l2.P1.X) + s1.X * (l1.P1.Y - l2.P1.Y)) / (-s2.X * s1.Y + s1.X * s2.Y);
float t = (s2.X * (l1.P1.Y - l2.P1.Y) - s2.Y * (l1.P1.X - l2.P1.X)) / (-s2.X * s1.Y + s1.X * s2.Y);
if (s >= 0 && s <= 1 && t >= 0 && t <= 1)
{
i = new Vector2(l1.P1.X + t * s1.X, l1.P1.Y + t * s1.Y);
return(i != l2.P1 && i != l2.P2);
}
i = new Vector2();
return(false);
}
public void Cut(Vector2 point, out LineSeg l1, out LineSeg l2)
{
l1 = new LineSeg(P1, point, Normal, Material);
l2 = new LineSeg(P2, point, Normal, Material);
}
