public void relocate(Client client)
{
int x_range = space.width - client.width;
int y_range = space.height - client.height;
if (x_range < 0) x_range = 0;
if (y_range < 0) y_range = 0;
client.x = x_range == 0 ? 0 : random.Next (x_range);
client.y = y_range == 0 ? 0 : random.Next (y_range);
// origin of space
client.x += space.x;
client.y += space.y;
client.move ();
}
