private static string cloudLine(string cloudType, Cloud cloud)
{
string x = ToInvariantString(cloud.position.X);
string y = ToInvariantString(cloud.position.Y);
string vx = ToInvariantString(cloud.velocity.X);
string vy = ToInvariantString(cloud.velocity.Y);
string vapor = ToInvariantString(cloud.vapor);
return string.Join(" ", cloudType, x, y, vx, vy, vapor);
}
public bool Intersects(Cloud b)
{
return (b.position - position).Length < b.Radius + Radius;
}