The world. More...

#include <world.hpp>

Inheritance diagram for flecs::world:

Public Member Functions
	world ()
	Create world.

	world (int argc, char *argv[])
	Create world with command line arguments.

	world (world_t *w)
	Create world from C world.

	world (const world &obj)
	Not allowed to copy a world.

world &	operator= (const world &obj) noexcept

	world (world &&obj) noexcept

world &	operator= (world &&obj) noexcept

void	release ()

	operator world_t * () const

void	make_owner ()
	Make current world object owner of the world.

void	reset ()
	Deletes and recreates the world.

world_t *	c_ptr () const
	Obtain pointer to C world object.

void	quit () const
	Signal application should quit.

void	atfini (ecs_fini_action_t action, void *ctx=nullptr) const
	Register action to be executed when world is destroyed.

bool	should_quit () const
	Test if quit() has been called.

ecs_ftime_t	frame_begin (float delta_time=0) const
	Begin frame.

void	frame_end () const
	End frame.

bool	readonly_begin (bool multi_threaded=false) const
	Begin readonly mode.

void	readonly_end () const
	End readonly mode.

bool	defer_begin () const
	Defer operations until end of frame.

bool	defer_end () const
	End block of operations to defer.

bool	is_deferred () const
	Test whether deferring is enabled.

void	set_stage_count (int32_t stages) const
	Configure world to have N stages.

int32_t	get_stage_count () const
	Get number of configured stages.

int32_t	get_stage_id () const
	Get current stage id.

bool	is_stage () const
	Test if is a stage.

void	merge () const
	Merge world or stage.

flecs::world	get_stage (int32_t stage_id) const
	Get stage-specific world pointer.

flecs::world	async_stage () const
	Create asynchronous stage.

flecs::world	get_world () const
	Get actual world.

bool	is_readonly () const
	Test whether the current world object is readonly.

void	set_ctx (void *ctx, ecs_ctx_free_t ctx_free=nullptr) const
	Set world context.

void *	get_ctx () const
	Get world context.

void	set_binding_ctx (void *ctx, ecs_ctx_free_t ctx_free=nullptr) const
	Set world binding context.

void *	get_binding_ctx () const
	Get world binding context.

void	dim (int32_t entity_count) const
	Preallocate memory for number of entities.

void	set_entity_range (entity_t min, entity_t max) const
	Set entity range.

void	enable_range_check (bool enabled=true) const
	Enforce that operations cannot modify entities outside of range.

flecs::entity	set_scope (const flecs::entity_t scope) const
	Set current scope.

flecs::entity	get_scope () const
	Get current scope.

template<typename T >
flecs::entity	set_scope () const
	Same as set_scope but with type.

flecs::entity_t *	set_lookup_path (const flecs::entity_t *search_path) const
	Set search path.

flecs::entity	lookup (const char name, const char sep="::", const char *root_sep="::", bool recursive=true) const
	Lookup entity by name.

template<typename T , if_t< !is_callable< T >::value > = 0>
void	set (const T &value) const
	Set singleton component.

template<typename T , if_t< !is_callable< T >::value > = 0>
void	set (T &&value) const
	Set singleton component.

template<typename First , typename Second , typename P = flecs::pair<First, Second>, typename A = actual_type_t<P>, if_not_t< flecs::is_pair< First >::value > = 0>
void	set (const A &value) const
	Set singleton pair.

template<typename First , typename Second , typename P = flecs::pair<First, Second>, typename A = actual_type_t<P>, if_not_t< flecs::is_pair< First >::value > = 0>
void	set (A &&value) const
	Set singleton pair.

template<typename First , typename Second >
void	set (Second second, const First &value) const
	Set singleton pair.

template<typename First , typename Second >
void	set (Second second, First &&value) const
	Set singleton pair.

template<typename Func , if_t< is_callable< Func >::value > = 0>
void	set (const Func &func) const
	Set singleton component inside a callback.

template<typename T , typename ... Args>
void	emplace (Args &&... args) const

template<typename T >
T &	ensure () const
	Ensure singleton component.

template<typename T >
void	modified () const
	Mark singleton component as modified.

template<typename T >
ref< T >	get_ref () const
	Get ref singleton component.

template<typename T >
const T *	get () const
	Get singleton component.

template<typename First , typename Second , typename P = flecs::pair<First, Second>, typename A = actual_type_t<P>>
const A *	get () const
	Get singleton pair.

template<typename First , typename Second >
const First *	get (Second second) const
	Get singleton pair.

template<typename Func , if_t< is_callable< Func >::value > = 0>
void	get (const Func &func) const
	Get singleton component inside a callback.

template<typename T >
T *	get_mut () const
	Get mutable singleton component.

template<typename First , typename Second , typename P = flecs::pair<First, Second>, typename A = actual_type_t<P>>
A *	get_mut () const
	Get mutable singleton pair.

template<typename First , typename Second >
First *	get_mut (Second second) const
	Get mutable singleton pair.

template<typename T >
bool	has () const
	Test if world has singleton component.

template<typename First , typename Second >
bool	has () const
	Test if world has the provided pair.

template<typename First >
bool	has (flecs::id_t second) const
	Test if world has the provided pair.

bool	has (flecs::id_t first, flecs::id_t second) const
	Test if world has the provided pair.

template<typename T >
void	add () const
	Add singleton component.

template<typename First , typename Second >
void	add () const
	Adds a pair to the singleton component.

template<typename First >
void	add (flecs::entity_t second) const
	Adds a pair to the singleton component.

void	add (flecs::entity_t first, flecs::entity_t second) const
	Adds a pair to the singleton entity.

template<typename T >
void	remove () const
	Remove singleton component.

template<typename First , typename Second >
void	remove () const
	Removes the pair singleton component.

template<typename First >
void	remove (flecs::entity_t second) const
	Removes the pair singleton component.

void	remove (flecs::entity_t first, flecs::entity_t second) const
	Removes the pair singleton component.

template<typename Func >
void	children (Func &&f) const
	Iterate entities in root of world Accepts a callback with the following signature:

template<typename T >
flecs::entity	singleton () const
	Get singleton entity for type.

template<typename First >
flecs::entity	target (int32_t index=0) const
	Get target for a given pair from a singleton entity.

template<typename T >
flecs::entity	target (flecs::entity_t first, int32_t index=0) const
	Get target for a given pair from a singleton entity.

flecs::entity	target (flecs::entity_t first, int32_t index=0) const
	Get target for a given pair from a singleton entity.

template<typename T >
flecs::entity	use (const char *alias=nullptr) const
	Create alias for component.

flecs::entity	use (const char name, const char alias=nullptr) const
	Create alias for entity.

void	use (flecs::entity entity, const char *alias=nullptr) const
	Create alias for entity.

int	count (flecs::id_t component_id) const
	Count entities matching a component.

int	count (flecs::entity_t first, flecs::entity_t second) const
	Count entities matching a pair.

template<typename T >
int	count () const
	Count entities matching a component.

template<typename First >
int	count (flecs::entity_t second) const
	Count entities matching a pair.

template<typename First , typename Second >
int	count () const
	Count entities matching a pair.

template<typename Func >
void	with (id_t with_id, const Func &func) const
	All entities created in function are created with id.

template<typename T , typename Func >
void	with (const Func &func) const
	All entities created in function are created with type.

template<typename First , typename Second , typename Func >
void	with (const Func &func) const
	All entities created in function are created with pair.

template<typename First , typename Func >
void	with (id_t second, const Func &func) const
	All entities created in function are created with pair.

template<typename Func >
void	with (id_t first, id_t second, const Func &func) const
	All entities created in function are created with pair.

template<typename Func >
void	scope (id_t parent, const Func &func) const
	All entities created in function are created in scope.

template<typename T , typename Func >
void	scope (const Func &func) const
	Same as scope(parent, func), but with T as parent.

flecs::scoped_world	scope (id_t parent) const
	Use provided scope for operations ran on returned world.

template<typename T >
flecs::scoped_world	scope () const

flecs::scoped_world	scope (const char *name) const

void	delete_with (id_t the_id) const
	Delete all entities with specified id.

void	delete_with (entity_t first, entity_t second) const
	Delete all entities with specified pair.

template<typename T >
void	delete_with () const
	Delete all entities with specified component.

template<typename First , typename Second >
void	delete_with () const
	Delete all entities with specified pair.

template<typename First >
void	delete_with (entity_t second) const
	Delete all entities with specified pair.

void	remove_all (id_t the_id) const
	Remove all instances of specified id.

void	remove_all (entity_t first, entity_t second) const
	Remove all instances of specified pair.

template<typename T >
void	remove_all () const
	Remove all instances of specified component.

template<typename First , typename Second >
void	remove_all () const
	Remove all instances of specified pair.

template<typename First >
void	remove_all (entity_t second) const
	Remove all instances of specified pair.

template<typename Func >
void	defer (const Func &func) const
	Defer all operations called in function.

void	defer_suspend () const
	Suspend deferring operations.

void	defer_resume () const
	Resume deferring operations.

bool	exists (flecs::entity_t e) const
	Check if entity id exists in the world.

bool	is_alive (flecs::entity_t e) const
	Check if entity id exists in the world.

bool	is_valid (flecs::entity_t e) const
	Check if entity id is valid.

flecs::entity	get_alive (flecs::entity_t e) const
	Get alive entity for id.

flecs::entity	make_alive (flecs::entity_t e) const

void	set_version (flecs::entity_t e) const
	Set version of entity to provided.

void	run_post_frame (ecs_fini_action_t action, void *ctx) const

const flecs::world_info_t *	get_info () const
	Get the world info.

ecs_ftime_t	delta_time () const
	Get delta_time.

void	init_builtin_components ()

template<typename... Comps, typename... Args>
flecs::alert_builder< Comps... >	alert (Args &&... args) const
	Create alert.

template<typename T , typename... Args>
flecs::component< T >	component (Args &&... args) const
	Find or register component.

template<typename... Args>
flecs::untyped_component	component (Args &&... args) const
	Find or register untyped component.

template<typename... Args>
flecs::entity	entity (Args &&... args) const
	Create an entity.

template<typename E , if_t< is_enum< E >::value > = 0>
flecs::id	id (E value) const
	Convert enum constant to entity.

template<typename E , if_t< is_enum< E >::value > = 0>
flecs::entity	entity (E value) const
	Convert enum constant to entity.

template<typename... Args>
flecs::entity	prefab (Args &&... args) const
	Create a prefab.

template<typename T >
flecs::entity	entity (const char *name=nullptr) const
	Create an entity that's associated with a type.

template<typename T >
flecs::entity	prefab (const char *name=nullptr) const
	Create a prefab that's associated with a type.

template<typename E , if_t< is_enum< E >::value > = 0>
flecs::entity	to_entity (E constant) const
	Convert enum constant to entity.

flecs::event_builder	event (flecs::entity_t evt) const
	Create a new event.

template<typename E >
flecs::event_builder_typed< E >	event () const
	Create a new event.

template<typename T >
flecs::id	id () const

template<typename ... Args>
flecs::id	id (Args &&... args) const

template<typename T >
flecs::id	id () const
	Get id from a type.

template<typename ... Args>
flecs::id	id (Args &&... args) const
	Id factory.

template<typename First , typename Second >
flecs::id	pair () const
	Get pair id from relationship, object.

template<typename First >
flecs::id	pair (entity_t o) const
	Get pair id from relationship, object.

flecs::id	pair (entity_t r, entity_t o) const
	Get pair id from relationship, object.

flecs::string	to_json (flecs::entity_t tid, const void *value)
	Serialize untyped value to JSON.

template<typename T >
flecs::string	to_json (const T *value)
	Serialize value to JSON.

flecs::string	to_json ()
	Serialize world to JSON.

const char *	from_json (flecs::entity_t tid, void value, const char json, flecs::from_json_desc_t *desc=nullptr)
	Deserialize value from JSON.

template<typename T >
const char *	from_json (T value, const char json, flecs::from_json_desc_t *desc=nullptr)
	Deserialize value from JSON.

const char *	from_json (const char json, flecs::from_json_desc_t desc=nullptr)
	Deserialize JSON into world.

const char *	from_json_file (const char json, flecs::from_json_desc_t desc=nullptr)
	Deserialize JSON file into world.

template<typename... Args>
flecs::metric_builder	metric (Args &&... args) const
	Create metric.

template<typename T >
flecs::timer	timer () const
	Find or register a singleton timer.


flecs::app_builder	app ()
	Return app builder.

Public Attributes
world_t *	world_

flecs::cursor	cursor (flecs::entity_t tid, void *ptr)
	Return meta cursor to value.

template<typename T >
flecs::cursor	cursor (void *ptr)
	Return meta cursor to value.

flecs::entity	primitive (flecs::meta::primitive_kind_t kind)
	Create primitive type.

flecs::entity	array (flecs::entity_t elem_id, int32_t array_count)
	Create array type.

template<typename T >
flecs::entity	array (int32_t array_count)
	Create array type.

flecs::entity	vector (flecs::entity_t elem_id)
	Create vector type.

template<typename T >
flecs::entity	vector ()
	Create vector type.

template<typename Module >
flecs::entity	module (const char *name=nullptr) const
	Define a module.

template<typename Module >
flecs::entity	import ()
	Import a module.

flecs::observer	observer (flecs::entity e) const
	Observer builder.

template<typename... Components, typename... Args>
flecs::observer_builder< Components... >	observer (Args &&... args) const
	Create a new observer.

flecs::pipeline_builder	pipeline () const
	Create a new pipeline.

template<typename Pipeline , if_not_t< is_enum< Pipeline >::value > = 0>
flecs::pipeline_builder	pipeline () const
	Create a new pipeline.

void	set_pipeline (const flecs::entity pip) const
	Set pipeline.

template<typename Pipeline >
void	set_pipeline () const
	Set pipeline.

flecs::entity	get_pipeline () const
	Get pipeline.

bool	progress (ecs_ftime_t delta_time=0.0) const
	Progress world one tick.

void	run_pipeline (const flecs::entity_t pip, ecs_ftime_t delta_time=0.0) const
	Run pipeline.

template<typename Pipeline , if_not_t< is_enum< Pipeline >::value > = 0>
void	run_pipeline (ecs_ftime_t delta_time=0.0) const
	Run pipeline.

void	set_time_scale (ecs_ftime_t mul) const
	Set timescale.

void	set_target_fps (ecs_ftime_t target_fps) const
	Set target FPS.

void	reset_clock () const
	Reset simulation clock.

void	set_threads (int32_t threads) const
	Set number of threads.

int32_t	get_threads () const
	Set number of threads.

void	set_task_threads (int32_t task_threads) const
	Set number of task threads.

bool	using_task_threads () const
	Returns true if task thread use has been requested.

template<typename... Comps, typename... Args>
flecs::query< Comps... >	query (Args &&... args) const
	Create a query.

flecs::query	query (flecs::entity query_entity) const
	Create a query from entity.

template<typename... Comps, typename... Args>
flecs::query_builder< Comps... >	query_builder (Args &&... args) const
	Create a query builder.

template<typename Func >
void	each (Func &&func) const
	Iterate over all entities with components in argument list of function.

template<typename T , typename Func >
void	each (Func &&func) const
	Iterate over all entities with provided component.

template<typename Func >
void	each (flecs::id_t term_id, Func &&func) const
	Iterate over all entities with provided (component) id.

flecs::system	system (flecs::entity e) const
	Upcast entity to a system.

template<typename... Components, typename... Args>
flecs::system_builder< Components... >	system (Args &&... args) const
	Create a new system.

template<typename... Args>
flecs::term	term (Args &&... args) const
	Create a term.

template<typename T >
flecs::term	term () const
	Create a term for a (component) type.

template<typename First , typename Second >
flecs::term	term () const
	Create a term for a pair.

Detailed Description

The world.

The world is the container of all ECS data and systems. If the world is deleted, all data in the world will be deleted as well.

Definition at line 137 of file world.hpp.

Constructor & Destructor Documentation

◆ world() [1/5]

flecs::world::world ( )

inlineexplicit

Create world.

Definition at line 140 of file world.hpp.

◆ world() [2/5]

flecs::world::world	(	int	argc,
		char *	argv[] )

inlineexplicit

Create world with command line arguments.

Currently command line arguments are not interpreted, but they may be used in the future to configure Flecs parameters.

Definition at line 149 of file world.hpp.

◆ world() [3/5]

flecs::world::world ( world_t * w )

inlineexplicit

Create world from C world.

Definition at line 156 of file world.hpp.

◆ world() [4/5]

flecs::world::world ( const world & obj )

inline

Not allowed to copy a world.

May only take a reference.

Definition at line 165 of file world.hpp.

◆ world() [5/5]

flecs::world::world ( world && obj )

inlinenoexcept

Definition at line 177 of file world.hpp.

◆ ~world()

flecs::world::~world ( )

inline

Definition at line 208 of file world.hpp.

Member Function Documentation

◆ add() [1/4]

template<typename T >

void flecs::world::add ( ) const

inline

Add singleton component.

Definition at line 173 of file world.hpp.

◆ add() [2/4]

template<typename First , typename Second >

void flecs::world::add ( ) const

inline

Adds a pair to the singleton component.

Template Parameters

First	The first element of the pair
Second	The second element of the pair

Definition at line 179 of file world.hpp.

◆ add() [3/4]

void flecs::world::add	(	flecs::entity_t	first,
		flecs::entity_t	second ) const

inline

Adds a pair to the singleton entity.

Parameters

first	The first element of the pair
second	The second element of the pair

Definition at line 190 of file world.hpp.

◆ add() [4/4]

template<typename First >

void flecs::world::add ( flecs::entity_t second ) const

inline

Adds a pair to the singleton component.

Template Parameters

First The first element of the pair

Parameters

second The second element of the pair.

Definition at line 185 of file world.hpp.

◆ async_stage()

flecs::world flecs::world::async_stage ( ) const

inline

Create asynchronous stage.

An asynchronous stage can be used to asynchronously queue operations for later merging with the world. An asynchronous stage is similar to a regular stage, except that it does not allow reading from the world.

Asynchronous stages are never merged automatically, and must therefore be manually merged with the ecs_merge function. It is not necessary to call defer_begin or defer_end before and after enqueuing commands, as an asynchronous stage unconditionally defers operations.

The application must ensure that no commands are added to the stage while the stage is being merged.

Returns: The stage.

Definition at line 477 of file world.hpp.

◆ atfini()

void flecs::world::atfini	(	ecs_fini_action_t	action,
		void *	ctx = nullptr ) const

inline

Register action to be executed when world is destroyed.

Definition at line 250 of file world.hpp.

◆ c_ptr()

world_t * flecs::world::c_ptr ( ) const

inline

Obtain pointer to C world object.

Definition at line 237 of file world.hpp.

◆ children()

template<typename Func >

void flecs::world::children ( Func && f ) const

inline

Iterate entities in root of world Accepts a callback with the following signature:

void(*)(flecs::entity e);

flecs::entity

Entity.

Definition entity.hpp:30

Definition at line 219 of file world.hpp.

◆ count() [1/5]

template<typename T >

int flecs::world::count ( ) const

inline

Count entities matching a component.

Template Parameters

T	The component type.

Definition at line 928 of file world.hpp.

◆ count() [2/5]

template<typename First , typename Second >

int flecs::world::count ( ) const

inline

Count entities matching a pair.

Template Parameters

First	The first element of the pair.
Second	The second element of the pair.

Definition at line 948 of file world.hpp.

◆ count() [3/5]

int flecs::world::count	(	flecs::entity_t	first,
		flecs::entity_t	second ) const

inline

Count entities matching a pair.

Parameters

first	The first element of the pair.
second	The second element of the pair.

Definition at line 919 of file world.hpp.

◆ count() [4/5]

template<typename First >

int flecs::world::count ( flecs::entity_t second ) const

inline

Count entities matching a pair.

Template Parameters

First The first element of the pair.

Parameters

second The second element of the pair.

Definition at line 938 of file world.hpp.

◆ count() [5/5]

int flecs::world::count ( flecs::id_t component_id ) const

inline

Count entities matching a component.

Parameters

component_id The component id.

Definition at line 910 of file world.hpp.

◆ defer()

template<typename Func >

void flecs::world::defer ( const Func & func ) const

inline

Defer all operations called in function.

See also: flecs::world::defer_begin(); flecs::world::defer_end(); flecs::world::defer_is_deferred(); flecs::world::defer_resume(); flecs::world::defer_suspend()

Definition at line 1084 of file world.hpp.

◆ defer_begin()

bool flecs::world::defer_begin ( ) const

inline

Defer operations until end of frame.

When this operation is invoked while iterating, operations inbetween the defer_begin() and defer_end() operations are executed at the end of the frame.

This operation is thread safe.

Returns: true if world changed from non-deferred mode to deferred mode.

See also: ecs_defer_begin(); flecs::world::defer(); flecs::world::defer_end(); flecs::world::is_deferred(); flecs::world::defer_resume(); flecs::world::defer_suspend()

Definition at line 337 of file world.hpp.

◆ defer_end()

bool flecs::world::defer_end ( ) const

inline

End block of operations to defer.

See defer_begin().

This operation is thread safe.

Returns: true if world changed from deferred mode to non-deferred mode.

See also: ecs_defer_end(); flecs::world::defer(); flecs::world::defer_begin(); flecs::world::is_deferred(); flecs::world::defer_resume(); flecs::world::defer_suspend()

Definition at line 355 of file world.hpp.

◆ defer_resume()

void flecs::world::defer_resume ( ) const

inline

Resume deferring operations.

See also: ecs_defer_resume(); flecs::world::defer(); flecs::world::defer_begin(); flecs::world::defer_end(); flecs::world::defer_is_deferred(); flecs::world::defer_suspend()

Definition at line 1112 of file world.hpp.

◆ defer_suspend()

void flecs::world::defer_suspend ( ) const

inline

Suspend deferring operations.

See also: ecs_defer_suspend(); flecs::world::defer(); flecs::world::defer_begin(); flecs::world::defer_end(); flecs::world::defer_is_deferred(); flecs::world::defer_resume()

Definition at line 1099 of file world.hpp.

◆ delete_with() [1/5]

template<typename T >

void flecs::world::delete_with ( ) const

inline

Delete all entities with specified component.

Definition at line 1031 of file world.hpp.

◆ delete_with() [2/5]

template<typename First , typename Second >

void flecs::world::delete_with ( ) const

inline

Delete all entities with specified pair.

Definition at line 1037 of file world.hpp.

◆ delete_with() [3/5]

void flecs::world::delete_with	(	entity_t	first,
		entity_t	second ) const

inline

Delete all entities with specified pair.

Definition at line 1025 of file world.hpp.

◆ delete_with() [4/5]

template<typename First >

void flecs::world::delete_with ( entity_t second ) const

inline

Delete all entities with specified pair.

Definition at line 1043 of file world.hpp.

◆ delete_with() [5/5]

void flecs::world::delete_with ( id_t the_id ) const

inline

Delete all entities with specified id.

Definition at line 1020 of file world.hpp.

◆ delta_time()

ecs_ftime_t flecs::world::delta_time ( ) const

inline

Get delta_time.

Definition at line 1181 of file world.hpp.

◆ dim()

void flecs::world::dim ( int32_t entity_count ) const

inline

Preallocate memory for number of entities.

This function preallocates memory for the entity index.

Parameters

entity_count Number of entities to preallocate memory for.

See also: ecs_dim()

Definition at line 572 of file world.hpp.

◆ emplace()

template<typename T , typename ... Args>

void flecs::world::emplace ( Args &&... args ) const

inline

Definition at line 693 of file world.hpp.

◆ enable_range_check()

void flecs::world::enable_range_check ( bool enabled = true ) const

inline

Enforce that operations cannot modify entities outside of range.

This function ensures that only entities within the specified range can be modified. Use this function if specific parts of the code only are allowed to modify a certain set of entities, as could be the case for networked applications.

Parameters

enabled True if range check should be enabled, false if not.

See also: ecs_enable_range_check()

Definition at line 598 of file world.hpp.

◆ ensure()

template<typename T >

T & flecs::world::ensure ( ) const

inline

Ensure singleton component.

Definition at line 83 of file world.hpp.

◆ exists()

bool flecs::world::exists ( flecs::entity_t e ) const

inline

Check if entity id exists in the world.

See also: ecs_exists(); flecs::world::is_alive(); flecs::world::is_valid()

Definition at line 1122 of file world.hpp.

◆ frame_begin()

ecs_ftime_t flecs::world::frame_begin ( float delta_time = 0 ) const

inline

Begin frame.

When an application does not use progress() to control the main loop, it can still use Flecs features such as FPS limiting and time measurements. This operation needs to be invoked whenever a new frame is about to get processed.

Calls to frame_begin() must always be followed by frame_end().

The function accepts a delta_time parameter, which will get passed to systems. This value is also used to compute the amount of time the function needs to sleep to ensure it does not exceed the target_fps, when it is set. When 0 is provided for delta_time, the time will be measured.

This function should only be ran from the main thread.

Parameters

delta_time Time elapsed since the last frame.

Returns: The provided delta_time, or measured time if 0 was provided.

See also: ecs_frame_begin(); flecs::world::frame_end()

Definition at line 281 of file world.hpp.

◆ frame_end()

void flecs::world::frame_end ( ) const

inline

End frame.

This operation must be called at the end of the frame, and always after frame_begin().

This function should only be ran from the main thread.

See also: ecs_frame_end(); flecs::world::frame_begin()

Definition at line 294 of file world.hpp.

◆ get() [1/4]

template<typename T >

const T * flecs::world::get ( ) const

inline

Get singleton component.

Definition at line 114 of file world.hpp.

◆ get() [2/4]

template<typename First , typename Second , typename P , typename A >

const A * flecs::world::get ( ) const

Get singleton pair.

Definition at line 120 of file world.hpp.

◆ get() [3/4]

template<typename Func , if_t< is_callable< Func >::value > >

void flecs::world::get ( const Func & func ) const

inline

Get singleton component inside a callback.

Definition at line 253 of file world.hpp.

◆ get() [4/4]

template<typename First , typename Second >

const First * flecs::world::get ( Second second ) const

Get singleton pair.

Definition at line 126 of file world.hpp.

◆ get_alive()

flecs::entity flecs::world::get_alive ( flecs::entity_t e ) const

inline

Get alive entity for id.

Returns the entity with the current generation.

See also: ecs_get_alive()

Definition at line 266 of file world.hpp.

◆ get_binding_ctx()

void * flecs::world::get_binding_ctx ( ) const

inline

Get world binding context.

This operation retrieves a previously set world binding context.

Returns: The context set with set_binding_ctx(). If no context was set, the function returns NULL.

See also: ecs_get_binding_ctx(); flecs::world::set_binding_ctx()

Definition at line 561 of file world.hpp.

◆ get_ctx()

void * flecs::world::get_ctx ( ) const

inline

Get world context.

This operation retrieves a previously set world context.

Returns: The context set with set_binding_ctx(). If no context was set, the function returns NULL.

See also: ecs_get_ctx(); flecs::world::set_ctx()

Definition at line 533 of file world.hpp.

◆ get_info()

const flecs::world_info_t * flecs::world::get_info ( ) const

inline

Get the world info.

See also: ecs_get_world_info()

Definition at line 1176 of file world.hpp.

◆ get_mut() [1/3]

template<typename T >

T * flecs::world::get_mut ( ) const

Get mutable singleton component.

Definition at line 132 of file world.hpp.

◆ get_mut() [2/3]

template<typename First , typename Second , typename P , typename A >

A * flecs::world::get_mut ( ) const

Get mutable singleton pair.

Definition at line 138 of file world.hpp.

◆ get_mut() [3/3]

template<typename First , typename Second >

First * flecs::world::get_mut ( Second second ) const

Get mutable singleton pair.

Definition at line 144 of file world.hpp.

◆ get_ref()

template<typename T >

ref< T > flecs::world::get_ref ( ) const

inline

Get ref singleton component.

Definition at line 108 of file world.hpp.

◆ get_scope()

flecs::entity flecs::world::get_scope ( ) const

inline

Get current scope.

Returns: The current scope.

See also: ecs_get_scope(); flecs::world::set_scope()

Definition at line 67 of file world.hpp.

◆ get_stage()

flecs::world flecs::world::get_stage ( int32_t stage_id ) const

inline

Get stage-specific world pointer.

Flecs threads can safely invoke the API as long as they have a private context to write to, also referred to as the stage. This function returns a pointer to a stage, disguised as a world pointer.

Note that this function does not(!) create a new world. It simply wraps the existing world in a thread-specific context, which the API knows how to unwrap. The reason the stage is returned as an ecs_world_t is so that it can be passed transparently to the existing API functions, vs. having to create a dediated API for threading.

Parameters

stage_id The index of the stage to retrieve.

Returns: A thread-specific pointer to the world.

Definition at line 458 of file world.hpp.

◆ get_stage_count()

int32_t flecs::world::get_stage_count ( ) const

inline

Get number of configured stages.

Return number of stages set by set_stage_count().

Returns: The number of stages used for threading.

See also: ecs_get_stage_count(); flecs::world::set_stage_count()

Definition at line 401 of file world.hpp.

◆ get_stage_id()

int32_t flecs::world::get_stage_id ( ) const

inline

Get current stage id.

The stage id can be used by an application to learn about which stage it is using, which typically corresponds with the worker thread id.

Returns: The stage id.

Definition at line 411 of file world.hpp.

◆ get_world()

flecs::world flecs::world::get_world ( ) const

inline

Get actual world.

If the current object points to a stage, this operation will return the actual world.

Returns: The actual world.

Definition at line 489 of file world.hpp.

◆ has() [1/4]

template<typename T >

bool flecs::world::has ( ) const

inline

Test if world has singleton component.

Definition at line 150 of file world.hpp.

◆ has() [2/4]

template<typename First , typename Second >

bool flecs::world::has ( ) const

inline

Test if world has the provided pair.

Template Parameters

First	The first element of the pair
Second	The second element of the pair

Definition at line 156 of file world.hpp.

◆ has() [3/4]

bool flecs::world::has	(	flecs::id_t	first,
		flecs::id_t	second ) const

inline

Test if world has the provided pair.

Parameters

first	The first element of the pair
second	The second element of the pair

Definition at line 167 of file world.hpp.

◆ has() [4/4]

template<typename First >

bool flecs::world::has ( flecs::id_t second ) const

inline

Test if world has the provided pair.

Template Parameters

First The first element of the pair

Parameters

second The second element of the pair.

Definition at line 162 of file world.hpp.

◆ id() [1/2]

template<typename T >

flecs::id flecs::world::id ( ) const

inline

Definition at line 70 of file impl.hpp.

◆ id() [2/2]

template<typename ... Args>

flecs::id flecs::world::id ( Args &&... args ) const

inline

Definition at line 75 of file impl.hpp.

◆ init_builtin_components()

void flecs::world::init_builtin_components ( )

inline

Definition at line 11 of file world.hpp.

◆ is_alive()

bool flecs::world::is_alive ( flecs::entity_t e ) const

inline

Check if entity id exists in the world.

See also: ecs_is_alive(); flecs::world::exists(); flecs::world::is_valid()

Definition at line 1132 of file world.hpp.

◆ is_deferred()

bool flecs::world::is_deferred ( ) const

inline

Test whether deferring is enabled.

Returns: True if deferred, false if not.

See also: ecs_is_deferred(); flecs::world::defer(); flecs::world::defer_begin(); flecs::world::defer_end(); flecs::world::defer_resume(); flecs::world::defer_suspend()

Definition at line 370 of file world.hpp.

◆ is_readonly()

bool flecs::world::is_readonly ( ) const

inline

Test whether the current world object is readonly.

This function allows the code to test whether the currently used world object is readonly or whether it allows for writing.

Returns: True if the world or stage is readonly.

See also: ecs_stage_is_readonly(); flecs::world::readonly_begin(); flecs::world::readonly_end()

Definition at line 505 of file world.hpp.

◆ is_stage()

bool flecs::world::is_stage ( ) const

inline

Test if is a stage.

If this function returns false, it is guaranteed that this is a valid world object.

Returns: True if the world is a stage, false if not.

Definition at line 421 of file world.hpp.

◆ is_valid()

bool flecs::world::is_valid ( flecs::entity_t e ) const

inline

Check if entity id is valid.

Invalid entities cannot be used with API functions.

See also: ecs_is_valid(); flecs::world::exists(); flecs::world::is_alive()

Definition at line 1143 of file world.hpp.

◆ lookup()

entity flecs::world::lookup	(	const char *	name,
		const char *	sep = "::",
		const char *	root_sep = "::",
		bool	recursive = true ) const

inline

Lookup entity by name.

Parameters

name	Entity name.
recursive	When false, only the current scope is searched.

Returns: The entity if found, or 0 if not found.

Definition at line 76 of file world.hpp.

◆ make_alive()

flecs::entity flecs::world::make_alive ( flecs::entity_t e ) const

inline

See also: ecs_make_alive()

Definition at line 271 of file world.hpp.

◆ make_owner()

void flecs::world::make_owner ( )

inline

Make current world object owner of the world.

This may only be called on one flecs::world object, an may only be called once. Failing to do so will result in undefined behavior.

This operation allows a custom (C) world to be wrapped by a C++ object, and transfer ownership so that the world is automatically cleaned up.

Definition at line 222 of file world.hpp.

◆ merge()

void flecs::world::merge ( ) const

inline

Merge world or stage.

When automatic merging is disabled, an application can call this operation on either an individual stage, or on the world which will merge all stages. This operation may only be called when staging is not enabled (either after progress() or after readonly_end()).

This operation may be called on an already merged stage or world.

See also: ecs_merge()

Definition at line 440 of file world.hpp.

◆ modified()

template<typename T >

void flecs::world::modified ( ) const

inline

Mark singleton component as modified.

Definition at line 90 of file world.hpp.

◆ operator world_t *()

flecs::world::operator world_t * ( ) const

inline

Definition at line 213 of file world.hpp.

◆ operator=() [1/2]

world & flecs::world::operator= ( const world & obj )

inlinenoexcept

Definition at line 170 of file world.hpp.

◆ operator=() [2/2]

world & flecs::world::operator= ( world && obj )

inlinenoexcept

Definition at line 182 of file world.hpp.

◆ quit()

void flecs::world::quit ( ) const

inline

Signal application should quit.

After calling this operation, the next call to progress() returns false.

Definition at line 244 of file world.hpp.

◆ readonly_begin()

bool flecs::world::readonly_begin ( bool multi_threaded = false ) const

inline

Begin readonly mode.

Parameters

multi_threaded Whether to enable readonly/multi threaded mode.

Returns: Whether world is currently readonly.

See also: ecs_readonly_begin(); flecs::world::is_readonly(); flecs::world::readonly_end()

Definition at line 308 of file world.hpp.

◆ readonly_end()

void flecs::world::readonly_end ( ) const

inline

End readonly mode.

See also: ecs_readonly_end(); flecs::world::is_readonly(); flecs::world::readonly_begin()

Definition at line 318 of file world.hpp.

◆ release()

void flecs::world::release ( )

inline

Definition at line 191 of file world.hpp.

◆ remove() [1/4]

template<typename T >

void flecs::world::remove ( ) const

inline

Remove singleton component.

Definition at line 196 of file world.hpp.

◆ remove() [2/4]

template<typename First , typename Second >

void flecs::world::remove ( ) const

inline

Removes the pair singleton component.

Template Parameters

First	The first element of the pair
Second	The second element of the pair

Definition at line 202 of file world.hpp.

◆ remove() [3/4]

void flecs::world::remove	(	flecs::entity_t	first,
		flecs::entity_t	second ) const

inline

Removes the pair singleton component.

Parameters

first	The first element of the pair
second	The second element of the pair

Definition at line 213 of file world.hpp.

◆ remove() [4/4]

template<typename First >

void flecs::world::remove ( flecs::entity_t second ) const

inline

Removes the pair singleton component.

Template Parameters

First The first element of the pair

Parameters

second The second element of the pair.

Definition at line 208 of file world.hpp.

◆ remove_all() [1/5]

template<typename T >

void flecs::world::remove_all ( ) const

inline

Remove all instances of specified component.

Definition at line 1059 of file world.hpp.

◆ remove_all() [2/5]

template<typename First , typename Second >

void flecs::world::remove_all ( ) const

inline

Remove all instances of specified pair.

Definition at line 1065 of file world.hpp.

◆ remove_all() [3/5]

void flecs::world::remove_all	(	entity_t	first,
		entity_t	second ) const

inline

Remove all instances of specified pair.

Definition at line 1053 of file world.hpp.

◆ remove_all() [4/5]

template<typename First >

void flecs::world::remove_all ( entity_t second ) const

inline

Remove all instances of specified pair.

Definition at line 1071 of file world.hpp.

◆ remove_all() [5/5]

void flecs::world::remove_all ( id_t the_id ) const

inline

Remove all instances of specified id.

Definition at line 1048 of file world.hpp.

◆ reset()

void flecs::world::reset ( )

inline

Deletes and recreates the world.

Definition at line 227 of file world.hpp.

◆ run_post_frame()

void flecs::world::run_post_frame	(	ecs_fini_action_t	action,
		void *	ctx ) const

inline

Definition at line 1168 of file world.hpp.

◆ scope() [1/5]

template<typename T >

flecs::scoped_world flecs::world::scope ( ) const

inline

Definition at line 319 of file world.hpp.

◆ scope() [2/5]

flecs::scoped_world flecs::world::scope ( const char * name ) const

inline

Definition at line 324 of file world.hpp.

◆ scope() [3/5]

template<typename T , typename Func >

void flecs::world::scope ( const Func & func ) const

inline

Same as scope(parent, func), but with T as parent.

Definition at line 1004 of file world.hpp.

◆ scope() [4/5]

flecs::scoped_world flecs::world::scope ( id_t parent ) const

inline

Use provided scope for operations ran on returned world.

Operations need to be ran in a single statement.

Definition at line 314 of file world.hpp.

◆ scope() [5/5]

template<typename Func >

void flecs::world::scope	(	id_t	parent,
		const Func &	func ) const

inline

All entities created in function are created in scope.

All operations called in function (such as lookup) are relative to scope.

Definition at line 995 of file world.hpp.

◆ set() [1/7]

template<typename First , typename Second , typename P = flecs::pair<First, Second>, typename A = actual_type_t<P>, if_not_t< flecs::is_pair< First >::value > = 0>

void flecs::world::set ( A && value ) const

inline

Set singleton pair.

Definition at line 673 of file world.hpp.

◆ set() [2/7]

template<typename First , typename Second , typename P = flecs::pair<First, Second>, typename A = actual_type_t<P>, if_not_t< flecs::is_pair< First >::value > = 0>

void flecs::world::set ( const A & value ) const

inline

Set singleton pair.

Definition at line 665 of file world.hpp.

◆ set() [3/7]

template<typename Func , if_t< is_callable< Func >::value > >

void flecs::world::set ( const Func & func ) const

inline

Set singleton component inside a callback.

Definition at line 260 of file world.hpp.

◆ set() [4/7]

template<typename T , if_t< !is_callable< T >::value > = 0>

void flecs::world::set ( const T & value ) const

inline

Set singleton component.

Definition at line 649 of file world.hpp.

◆ set() [5/7]

template<typename First , typename Second >

void flecs::world::set	(	Second	second,
		const First &	value ) const

inline

Set singleton pair.

Definition at line 96 of file world.hpp.

◆ set() [6/7]

template<typename First , typename Second >

void flecs::world::set	(	Second	second,
		First &&	value ) const

inline

Set singleton pair.

Definition at line 102 of file world.hpp.

◆ set() [7/7]

template<typename T , if_t< !is_callable< T >::value > = 0>

void flecs::world::set ( T && value ) const

inline

Set singleton component.

Definition at line 656 of file world.hpp.

◆ set_binding_ctx()

void flecs::world::set_binding_ctx	(	void *	ctx,
		ecs_ctx_free_t	ctx_free = nullptr ) const

inline

Set world binding context.

Same as set_ctx() but for binding context. A binding context is intended specifically for language bindings to store binding specific data.

Parameters

ctx	A pointer to a user defined structure.
ctx_free	A function that is invoked with ctx when the world is freed.

See also: ecs_set_binding_ctx(); flecs::world::get_binding_ctx()

Definition at line 548 of file world.hpp.

◆ set_ctx()

void flecs::world::set_ctx	(	void *	ctx,
		ecs_ctx_free_t	ctx_free = nullptr ) const

inline

Set world context.

Set a context value that can be accessed by anyone that has a reference to the world.

Parameters

ctx	A pointer to a user defined structure.
ctx_free	A function that is invoked with ctx when the world is freed.

See also: ecs_set_ctx(); flecs::world::get_ctx()

Definition at line 520 of file world.hpp.

◆ set_entity_range()

void flecs::world::set_entity_range	(	entity_t	min,
		entity_t	max ) const

inline

Set entity range.

This function limits the range of issued entity ids between min and max.

Parameters

min	Minimum entity id issued.
max	Maximum entity id issued.

See also: ecs_set_entity_range()

Definition at line 584 of file world.hpp.

◆ set_lookup_path()

flecs::entity_t * flecs::world::set_lookup_path ( const flecs::entity_t * search_path ) const

inline

Set search path.

See also: ecs_set_lookup_path(); flecs::world::lookup()

Definition at line 634 of file world.hpp.

◆ set_scope() [1/2]

template<typename T >

flecs::entity flecs::world::set_scope ( ) const

inline

Same as set_scope but with type.

See also: ecs_set_scope(); flecs::world::get_scope()

Definition at line 72 of file world.hpp.

◆ set_scope() [2/2]

flecs::entity flecs::world::set_scope ( const flecs::entity_t scope ) const

inline

Set current scope.

Parameters

scope The scope to set.

Returns: The current scope;

See also: ecs_set_scope(); flecs::world::get_scope()

Definition at line 63 of file world.hpp.

◆ set_stage_count()

void flecs::world::set_stage_count ( int32_t stages ) const

inline

Configure world to have N stages.

This initializes N stages, which allows applications to defer operations to multiple isolated defer queues. This is typically used for applications with multiple threads, where each thread gets its own queue, and commands are merged when threads are synchronized.

Note that set_threads() already creates the appropriate number of stages. The set_stage_count() operation is useful for applications that want to manage their own stages and/or threads.

Parameters

stages The number of stages.

See also: ecs_set_stage_count(); flecs::world::get_stage_count()

Definition at line 389 of file world.hpp.

◆ set_version()

void flecs::world::set_version ( flecs::entity_t e ) const

inline

Set version of entity to provided.

See also: ecs_set_version()

Definition at line 1163 of file world.hpp.

◆ should_quit()

bool flecs::world::should_quit ( ) const

inline

Test if quit() has been called.

Definition at line 256 of file world.hpp.

◆ singleton()

template<typename T >

flecs::entity flecs::world::singleton ( ) const

inline

Get singleton entity for type.

Definition at line 224 of file world.hpp.

◆ target() [1/3]

template<typename T >

flecs::entity flecs::world::target	(	flecs::entity_t	first,
		int32_t	index = 0 ) const

inline

Get target for a given pair from a singleton entity.

This operation returns the target for a given pair. The optional index can be used to iterate through targets, in case the entity has multiple instances for the same relationship.

Parameters

first	The first element of the pair for which to retrieve the target.
index	The index (0 for the first instance of the relationship).

Definition at line 236 of file world.hpp.

◆ target() [2/3]

flecs::entity flecs::world::target	(	flecs::entity_t	first,
		int32_t	index = 0 ) const

inline

Get target for a given pair from a singleton entity.

This operation returns the target for a given pair. The optional index can be used to iterate through targets, in case the entity has multiple instances for the same relationship.

Parameters

first	The first element of the pair for which to retrieve the target.
index	The index (0 for the first instance of the relationship).

Definition at line 244 of file world.hpp.

◆ target() [3/3]

template<typename First >

flecs::entity flecs::world::target ( int32_t index = 0 ) const

inline

Get target for a given pair from a singleton entity.

This operation returns the target for a given pair. The optional index can be used to iterate through targets, in case the entity has multiple instances for the same relationship.

Template Parameters

First The first element of the pair.

Parameters

index The index (0 for the first instance of the relationship).

Definition at line 229 of file world.hpp.

◆ use() [1/3]

template<typename T >

flecs::entity flecs::world::use ( const char * alias = nullptr ) const

inline

Create alias for component.

Template Parameters

T	to create an alias for.

Parameters

alias Alias for the component.

Returns: Entity representing the component.

Definition at line 34 of file world.hpp.

◆ use() [2/3]

flecs::entity flecs::world::use	(	const char *	name,
		const char *	alias = nullptr ) const

inline

Create alias for entity.

Parameters

name	Name of the entity.
alias	Alias for the entity.

Definition at line 45 of file world.hpp.

◆ use() [3/3]

void flecs::world::use	(	flecs::entity	entity,
		const char *	alias = nullptr ) const

inline

Create alias for entity.

Parameters

entity	Entity for which to create the alias.
alias	Alias for the entity.

Definition at line 53 of file world.hpp.

◆ with() [1/5]

template<typename T , typename Func >

void flecs::world::with ( const Func & func ) const

inline

All entities created in function are created with type.

Definition at line 966 of file world.hpp.

◆ with() [2/5]

template<typename First , typename Second , typename Func >

void flecs::world::with ( const Func & func ) const

inline

All entities created in function are created with pair.

Definition at line 973 of file world.hpp.

◆ with() [3/5]

template<typename Func >

void flecs::world::with	(	id_t	first,
		id_t	second,
		const Func &	func ) const

inline

All entities created in function are created with pair.

Definition at line 987 of file world.hpp.

◆ with() [4/5]

template<typename First , typename Func >

void flecs::world::with	(	id_t	second,
		const Func &	func ) const

inline

All entities created in function are created with pair.

Definition at line 980 of file world.hpp.

◆ with() [5/5]

template<typename Func >

void flecs::world::with	(	id_t	with_id,
		const Func &	func ) const

inline

All entities created in function are created with id.

Definition at line 957 of file world.hpp.

Member Data Documentation

◆ world_

world_t* flecs::world::world_

Definition at line 1228 of file world.hpp.

The documentation for this struct was generated from the following files:

include/flecs/addons/cpp/world.hpp
include/flecs/addons/cpp/impl/world.hpp
include/flecs/addons/cpp/mixins/alerts/mixin.inl
include/flecs/addons/cpp/mixins/app/mixin.inl
include/flecs/addons/cpp/mixins/component/mixin.inl
include/flecs/addons/cpp/mixins/entity/mixin.inl
include/flecs/addons/cpp/mixins/enum/mixin.inl
include/flecs/addons/cpp/mixins/event/mixin.inl
include/flecs/addons/cpp/mixins/id/impl.hpp
include/flecs/addons/cpp/mixins/id/mixin.inl
include/flecs/addons/cpp/mixins/json/world.inl
include/flecs/addons/cpp/mixins/meta/world.inl
include/flecs/addons/cpp/mixins/metrics/mixin.inl
include/flecs/addons/cpp/mixins/module/mixin.inl
include/flecs/addons/cpp/mixins/observer/mixin.inl
include/flecs/addons/cpp/mixins/pipeline/mixin.inl
include/flecs/addons/cpp/mixins/query/mixin.inl
include/flecs/addons/cpp/mixins/system/mixin.inl
include/flecs/addons/cpp/mixins/term/mixin.inl
include/flecs/addons/cpp/mixins/timer/mixin.inl

Public Member Functions

Public Attributes

Detailed Description

Constructor & Destructor Documentation

◆ world() [1/5]

◆ world() [2/5]

◆ world() [3/5]

◆ world() [4/5]

◆ world() [5/5]

◆ ~world()

Member Function Documentation

◆ add() [1/4]

◆ add() [2/4]

◆ add() [3/4]

◆ add() [4/4]

◆ async_stage()

◆ atfini()

◆ c_ptr()

◆ children()

◆ count() [1/5]

◆ count() [2/5]

◆ count() [3/5]

◆ count() [4/5]

◆ count() [5/5]

◆ defer()

◆ defer_begin()

◆ defer_end()

◆ defer_resume()

◆ defer_suspend()

◆ delete_with() [1/5]

◆ delete_with() [2/5]

◆ delete_with() [3/5]

◆ delete_with() [4/5]

◆ delete_with() [5/5]

◆ delta_time()

◆ dim()

◆ emplace()

◆ enable_range_check()

◆ ensure()

◆ exists()

◆ frame_begin()

◆ frame_end()

◆ get() [1/4]

◆ get() [2/4]

◆ get() [3/4]

◆ get() [4/4]

◆ get_alive()

◆ get_binding_ctx()

◆ get_ctx()

◆ get_info()

◆ get_mut() [1/3]

◆ get_mut() [2/3]

◆ get_mut() [3/3]

◆ get_ref()

◆ get_scope()

◆ get_stage()

◆ get_stage_count()

◆ get_stage_id()

◆ get_world()

◆ has() [1/4]

◆ has() [2/4]

◆ has() [3/4]

◆ has() [4/4]

◆ id() [1/2]

◆ id() [2/2]

◆ init_builtin_components()

◆ is_alive()

◆ is_deferred()

◆ is_readonly()

◆ is_stage()

◆ is_valid()

◆ lookup()

◆ make_alive()

◆ make_owner()

◆ merge()

◆ modified()

◆ operator world_t *()

◆ operator=() [1/2]

◆ operator=() [2/2]

◆ quit()