public Vec2(Vec2 vec)
{
this.X = vec.X;
this.Y = vec.Y;
}
public bool Equals(Vec2 other)
{
return(X.Equals(other.X) && Y.Equals(other.Y));
}
public static double DistanceSq(Vec2 a, Vec2 b)
{
return((a.X - b.X) * (a.X - b.X) + (a.Y - b.Y) * (a.Y - b.Y));
}
public static Vec2 Cross(double s, Vec2 a)
{
a.X *= s;
a.Y *= -s;
return(a);
}
public static Vec2 Cross(Vec2 a, double s)
{
a.X *= -s;
a.Y *= s;
return(a);
}
public static double Cross(Vec2 a, Vec2 b)
{
return(a.X * b.Y - a.Y * b.X);
}
public static double Dot(Vec2 a, Vec2 b)
{
return(a.X * b.X + a.Y * b.Y);
}