public static float DistanceTo(Vector2 line1, Vector2 line2, Vector2 a)
{
float r = Math.Min(Length(line1, a), Length(line2, a));
float length = LineMath.Length(line1, line2);
if (length == 0)
{
return(r);
}
Vector2 n = LineMath.Scale(LineMath.Sub(line1, line2), 1.0f / length);
float d1 = LineMath.Mult(line1, n) - LineMath.Mult(a, n);
n = new Vector2(-n.Y, n.X);
float d2 = LineMath.Mult(line1, n) - LineMath.Mult(a, n);
if (d1 <= length && d1 >= 0)
{
return(Math.Min(Math.Abs(d2), r));
}
return(r);
}
