Used with ecs_observer_init(). More...

#include <flecs.h>

Public Attributes
int32_t	_canary
	Used for validity testing.

ecs_entity_t	entity
	Existing entity to associate with observer (optional)

ecs_query_desc_t	query
	Query for observer.

ecs_entity_t	events [8]
	Events to observe (OnAdd, OnRemove, OnSet)

bool	yield_existing
	When observer is created, generate events from existing data.

ecs_iter_action_t	callback
	Callback to invoke on an event, invoked when the observer matches.

ecs_run_action_t	run
	Callback invoked on an event.

void *	ctx
	User context to pass to callback.

ecs_ctx_free_t	ctx_free
	Callback to free ctx.

void *	callback_ctx
	Context associated with callback (for language bindings).

ecs_ctx_free_t	callback_ctx_free
	Callback to free callback ctx.

void *	run_ctx
	Context associated with run (for language bindings).

ecs_ctx_free_t	run_ctx_free
	Callback to free run ctx.

int32_t *	last_event_id
	Used for internal purposes.

int8_t	term_index_

ecs_flags32_t	flags_

Detailed Description

Used with ecs_observer_init().

Definition at line 1325 of file flecs.h.

Member Data Documentation

◆ _canary

int32_t ecs_observer_desc_t::_canary

Used for validity testing.

Must be 0.

Definition at line 1327 of file flecs.h.

◆ callback

ecs_iter_action_t ecs_observer_desc_t::callback

Callback to invoke on an event, invoked when the observer matches.

Definition at line 1343 of file flecs.h.

◆ callback_ctx

void* ecs_observer_desc_t::callback_ctx

Context associated with callback (for language bindings).

Definition at line 1360 of file flecs.h.

◆ callback_ctx_free

ecs_ctx_free_t ecs_observer_desc_t::callback_ctx_free

Callback to free callback ctx.

Definition at line 1363 of file flecs.h.

◆ ctx

void* ecs_observer_desc_t::ctx

User context to pass to callback.

Definition at line 1354 of file flecs.h.

◆ ctx_free

ecs_ctx_free_t ecs_observer_desc_t::ctx_free

Callback to free ctx.

Definition at line 1357 of file flecs.h.

◆ entity

ecs_entity_t ecs_observer_desc_t::entity

Existing entity to associate with observer (optional)

Definition at line 1330 of file flecs.h.

◆ events

ecs_entity_t ecs_observer_desc_t::events[8]

Events to observe (OnAdd, OnRemove, OnSet)

Definition at line 1336 of file flecs.h.

◆ flags_

ecs_flags32_t ecs_observer_desc_t::flags_

Definition at line 1374 of file flecs.h.

◆ last_event_id

int32_t* ecs_observer_desc_t::last_event_id

Used for internal purposes.

Do not set.

Definition at line 1372 of file flecs.h.

◆ query

ecs_query_desc_t ecs_observer_desc_t::query

Query for observer.

Definition at line 1333 of file flecs.h.

◆ run

ecs_run_action_t ecs_observer_desc_t::run

Callback invoked on an event.

When left to NULL the default runner is used which matches the event with the observer's query, and calls 'callback' when it matches. A reason to override the run function is to improve performance, if there are more efficient way to test whether an event matches the observer than the general purpose query matcher.

Definition at line 1351 of file flecs.h.

◆ run_ctx

void* ecs_observer_desc_t::run_ctx

Context associated with run (for language bindings).

Definition at line 1366 of file flecs.h.

◆ run_ctx_free

ecs_ctx_free_t ecs_observer_desc_t::run_ctx_free

Callback to free run ctx.

Definition at line 1369 of file flecs.h.

◆ term_index_

int8_t ecs_observer_desc_t::term_index_

Definition at line 1373 of file flecs.h.

◆ yield_existing

bool ecs_observer_desc_t::yield_existing

When observer is created, generate events from existing data.

For example, EcsOnAdd Position would match all existing instances of Position.

Definition at line 1340 of file flecs.h.

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

include/flecs.h

Public Attributes