Generate random numbers. More...

#include "global.hpp"
#include "config.hpp"
#include "log.hpp"
#include "network.hpp"
#include "random.hpp"
#include "rng.hpp"
#include "serialization/string_utils.hpp"
#include "simple_rng.hpp"
#include "util.hpp"

Include dependency graph for random.cpp:

Go to the source code of this file.

Namespaces
namespace	rand_rng
Defines
#define	DBG_RND LOG_STREAM(debug, log_random)
#define	LOG_RND LOG_STREAM(info, log_random)
#define	WRN_RND LOG_STREAM(warn, log_random)
#define	ERR_RND LOG_STREAM(err, log_random)
Functions
int	get_random ()
int	get_random_nocheck ()
const config *	get_random_results ()
void	set_random_results (const config &cfg)
void	rand_rng::set_seed (int seed)
	Set the random seed for the current random number generator, sets the seed as valid nd calls the new seed callback if set.
void	rand_rng::invalidate_seed ()
	Mark the RNG seed as invalid.
bool	rand_rng::has_valid_seed ()
	Function to check whether the RNG has been updated with a new seed since the las invalidate_seed() call.
int	rand_rng::get_last_seed ()
	Get the last seed the RNG was seeded with in set_seed.
void	rand_rng::set_new_seed_callback (boost::function< void(int)> f)
	Set the callback for a function that will be called on subsequent set_seed calls.
bool	rand_rng::has_new_seed_callback ()
void	rand_rng::clear_new_seed_callback ()
	Clear the new seed callback.
Variables
static lg::log_domain	log_random ("random")

Detailed Description

Generate random numbers.

There are various ways to get a random number. rand() This can be used for things that never are send over the network e.g. generate a random map (the final result the map is send, but the other players don't need to generate the map.

get_random() A random generator which is synchronized over the network this only seems to work when it's used by 1 player at the same time. It's synchronized after an event so if an event runs at two clients at the same time it gets out of sync and sets the entire game out of sync.

game_state::get_random() A random generator which is seeded by the host of an MP game. This generator is (not yet) synchronized over the network. It's only used by [set_variable]rand=. The map designer has to make sure it stays in sync. This generator can be used at the same time at multiple client since the generators are always in sync.

Definition in file random.cpp.