Flecs v4.0
A fast entity component system (ECS) for C & C++
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flecs::observer Struct Referencefinal
Inheritance diagram for flecs::observer:
[legend]

Public Member Functions

 observer (flecs::world_t *world, ecs_observer_desc_t *desc)
 
void ctx (void *ctx)
 
void * ctx () const
 
flecs::query query () const
 
 entity ()
 
 entity (world_t *world)
 Create entity.
 
 entity (const flecs::world_t *world, flecs::entity_t id)
 Wrap an existing entity id.
 
 entity (world_t *world, const char *name)
 Create a named entity.
 
 entity (entity_t id)
 Conversion from flecs::entity_t to flecs::entity.
 
- Public Member Functions inherited from flecs::entity
 entity (world_t *world)
 Create entity.
 
 entity (const flecs::world_t *world, flecs::entity_t id)
 Wrap an existing entity id.
 
 entity (world_t *world, const char *name)
 Create a named entity.
 
 entity (entity_t id)
 Conversion from flecs::entity_t to flecs::entity.
 
template<typename T >
T & ensure () const
 Get mutable component value.
 
void * ensure (entity_t comp) const
 Get mutable component value (untyped).
 
template<typename First , typename Second , typename P = pair<First, Second>, typename A = actual_type_t<P>, if_not_t< flecs::is_pair< First >::value > = 0>
A & ensure () const
 Get mutable pointer for a pair.
 
template<typename First >
First & ensure (entity_t second) const
 Get mutable pointer for the first element of a pair.
 
void * ensure (entity_t first, entity_t second) const
 Get mutable pointer for a pair (untyped).
 
template<typename Second >
Second & ensure_second (entity_t first) const
 Get mutable pointer for the second element of a pair.
 
template<typename T >
void modified () const
 Signal that component was modified.
 
template<typename First , typename Second , typename A = actual_type_t<flecs::pair<First, Second>>>
void modified () const
 Signal that the first element of a pair was modified.
 
template<typename First >
void modified (entity_t second) const
 Signal that the first part of a pair was modified.
 
void modified (entity_t first, entity_t second) const
 Signal that a pair has modified (untyped).
 
void modified (entity_t comp) const
 Signal that component was modified.
 
template<typename T , if_t< is_actual< T >::value > = 0>
ref< T > get_ref () const
 Get reference to component.
 
template<typename T , typename A = actual_type_t<T>, if_t< flecs::is_pair< T >::value > = 0>
ref< A > get_ref () const
 Get reference to component.
 
template<typename First , typename Second , typename P = flecs::pair<First, Second>, typename A = actual_type_t<P>>
ref< A > get_ref () const
 
template<typename First >
ref< First > get_ref (flecs::entity_t second) const
 
template<typename Second >
ref< Second > get_ref_second (flecs::entity_t first) const
 
void clear () const
 Clear an entity.
 
void destruct () const
 Delete an entity.
 
flecs::entity_view view () const
 Return entity as entity_view.
 
const char * from_json (const char *json)
 Deserialize entity to JSON.
 
- Public Member Functions inherited from flecs::entity_builder< entity >
const entityadd () const
 Add a component to an entity.
 
const entityadd (E value) const
 Add pair for enum constant.
 
const entityadd (id_t component) const
 Add an entity to an entity.
 
const entityadd (entity_t first, entity_t second) const
 Add a pair.
 
const entityadd () const
 Add a pair.
 
const entityadd (Second second) const
 Add a pair.
 
const entityadd (Second constant) const
 Add a pair.
 
const entityadd_second (flecs::entity_t first) const
 Add a pair.
 
const entityadd_if (bool cond, flecs::id_t component) const
 Conditional add.
 
const entityadd_if (bool cond) const
 Conditional add.
 
const entityadd_if (bool cond, flecs::entity_t first, flecs::entity_t second) const
 Conditional add.
 
const entityadd_if (bool cond, flecs::entity_t second) const
 Conditional add.
 
const entityadd_if (bool cond) const
 Conditional add.
 
const entityadd_if (bool cond, E constant) const
 Conditional add.
 
const entityis_a (entity_t second) const
 Shortcut for add(IsA, entity).
 
const entityis_a () const
 Shortcut for add(IsA, entity).
 
const entitychild_of (entity_t second) const
 Shortcut for add(ChildOf, entity).
 
const entitychild_of () const
 Shortcut for add(ChildOf, entity).
 
const entitydepends_on (entity_t second) const
 Shortcut for add(DependsOn, entity).
 
const entitydepends_on (E second) const
 Shortcut for add(DependsOn, entity).
 
const entitydepends_on () const
 Shortcut for add(DependsOn, entity).
 
const entityslot_of (entity_t second) const
 Shortcut for add(SlotOf, entity).
 
const entityslot_of () const
 Shortcut for add(SlotOf, entity).
 
const entityslot () const
 Shortcut for add(SlotOf, target(ChildOf)).
 
const entityremove () const
 Remove a component from an entity.
 
const entityremove () const
 Remove pair for enum.
 
const entityremove (entity_t entity) const
 Remove an entity from an entity.
 
const entityremove (entity_t first, entity_t second) const
 Remove a pair.
 
const entityremove () const
 Removes a pair.
 
const entityremove (Second second) const
 Remove a pair.
 
const entityremove (Second constant) const
 Remove a pair.
 
const entityremove_second (flecs::entity_t first) const
 Removes a pair.
 
const entityauto_override (flecs::id_t id) const
 Mark id for auto-overriding.
 
const entityauto_override (flecs::entity_t first, flecs::entity_t second) const
 Mark pair for auto-overriding.
 
const entityauto_override () const
 Mark component for auto-overriding.
 
const entityauto_override (flecs::entity_t second) const
 Mark pair for auto-overriding.
 
const entityauto_override () const
 Mark pair for auto-overriding.
 
const entityset_auto_override (const T &val) const
 Set component, mark component for auto-overriding.
 
const entityset_auto_override (T &&val) const
 Set component, mark component for auto-overriding.
 
const entityset_auto_override (flecs::entity_t second, const First &val) const
 Set pair, mark component for auto-overriding.
 
const entityset_auto_override (flecs::entity_t second, First &&val) const
 Set pair, mark component for auto-overriding.
 
const entityset_auto_override (const A &val) const
 Set component, mark component for auto-overriding.
 
const entityset_auto_override (A &&val) const
 Set component, mark component for auto-overriding.
 
const entityemplace_auto_override (Args &&... args) const
 Emplace component, mark component for auto-overriding.
 
const entityemplace_auto_override (Args &&... args) const
 Emplace pair, mark pair for auto-overriding.
 
const entityenable () const
 Enable an entity.
 
const entityenable (flecs::id_t id, bool toggle=true) const
 Enable an id.
 
const entityenable () const
 Enable a component.
 
const entityenable (flecs::id_t first, flecs::id_t second) const
 Enable a pair.
 
const entityenable (flecs::id_t second) const
 Enable a pair.
 
const entityenable () const
 Enable a pair.
 
const entitydisable () const
 Disable an entity.
 
const entitydisable (flecs::id_t id) const
 Disable an id.
 
const entitydisable () const
 Disable a component.
 
const entitydisable (flecs::id_t first, flecs::id_t second) const
 Disable a pair.
 
const entitydisable (flecs::id_t second) const
 Disable a pair.
 
const entitydisable () const
 Disable a pair.
 
const entityset_ptr (entity_t comp, size_t size, const void *ptr) const
 
const entityset_ptr (entity_t comp, const void *ptr) const
 
const entityset (T &&value) const
 
const entityset (const T &value) const
 
const entityset (A &&value) const
 
const entityset (const A &value) const
 
const entityset (A &&value) const
 Set a pair for an entity.
 
const entityset (const A &value) const
 Set a pair for an entity.
 
const entityset (Second second, const First &value) const
 Set a pair for an entity.
 
const entityset (Second second, First &&value) const
 Set a pair for an entity.
 
const entityset (Second constant, const First &value) const
 Set a pair for an entity.
 
const entityset_second (entity_t first, const Second &value) const
 Set a pair for an entity.
 
const entityset_second (entity_t first, Second &&value) const
 Set a pair for an entity.
 
const entityset_second (const Second &value) const
 
const entityinsert (const Func &func) const
 Set 1..N components.
 
const entityemplace (Args &&... args) const
 Emplace component.
 
const entityemplace (Args &&... args) const
 
const entityemplace_first (flecs::entity_t second, Args &&... args) const
 
const entityemplace_second (flecs::entity_t first, Args &&... args) const
 
const entitywith (const Func &func) const
 Entities created in function will have the current entity.
 
const entitywith (const Func &func) const
 Entities created in function will have (First, this).
 
const entitywith (entity_t first, const Func &func) const
 Entities created in function will have (first, this).
 
const entityscope (const Func &func) const
 The function will be ran with the scope set to the current entity.
 
scoped_world scope () const
 Return world scoped to entity.
 
const entityset_name (const char *name) const
 
const entityset_alias (const char *name) const
 
const entityset_doc_name (const char *name) const
 Set human readable name.
 
const entityset_doc_brief (const char *brief) const
 Set brief description.
 
const entityset_doc_detail (const char *detail) const
 Set detailed description.
 
const entityset_doc_link (const char *link) const
 Set link to external documentation.
 
const entityset_doc_color (const char *color) const
 Set doc color.
 
const entityset_doc_uuid (const char *uuid) const
 Set doc UUID.
 
const entityobserve (flecs::entity_t evt, Func &&callback) const
 Observe event on entity.
 
const entityobserve (Func &&callback) const
 Observe event on entity.
 
const entityobserve (Func &&callback) const
 Observe event on entity.
 
const entityset_json (flecs::id_t e, const char *json, flecs::from_json_desc_t *desc=nullptr) const
 Set component from JSON.
 
const entityset_json (flecs::entity_t r, flecs::entity_t t, const char *json, flecs::from_json_desc_t *desc=nullptr) const
 Set pair from JSON.
 
const entityset_json (const char *json, flecs::from_json_desc_t *desc=nullptr) const
 Set component from JSON.
 
const entityset_json (const char *json, flecs::from_json_desc_t *desc=nullptr) const
 Set pair from JSON.
 
const entityset_json (flecs::entity_t t, const char *json, flecs::from_json_desc_t *desc=nullptr) const
 Set pair from JSON.
 
const entityset_json_second (flecs::entity_t r, const char *json, flecs::from_json_desc_t *desc=nullptr) const
 Set pair from JSON.
 
 entity_view ()
 
 entity_view (flecs::world_t *world, flecs::id_t id)
 Wrap an existing entity id.
 
 entity_view (entity_t id)
 Implicit conversion from flecs::entity_t to flecs::entity_view.
 
- Public Member Functions inherited from flecs::entity_view
 entity_view (flecs::world_t *world, flecs::id_t id)
 Wrap an existing entity id.
 
 entity_view (entity_t id)
 Implicit conversion from flecs::entity_t to flecs::entity_view.
 
entity_t id () const
 Get entity id.
 
bool is_valid () const
 Check if entity is valid.
 
 operator bool () const
 
bool is_alive () const
 Check if entity is alive.
 
flecs::string_view name () const
 Return the entity name.
 
flecs::string_view symbol () const
 Return the entity symbol.
 
flecs::string path (const char *sep="::", const char *init_sep="::") const
 Return the entity path.
 
flecs::string path_from (flecs::entity_t parent, const char *sep="::", const char *init_sep="::") const
 Return the entity path relative to a parent.
 
template<typename Parent >
flecs::string path_from (const char *sep="::", const char *init_sep="::") const
 Return the entity path relative to a parent.
 
bool enabled () const
 
flecs::type type () const
 Get the entity's type.
 
flecs::table table () const
 Get the entity's table.
 
flecs::table_range range () const
 Get table range for the entity.
 
template<typename Func >
void each (const Func &func) const
 Iterate (component) ids of an entity.
 
template<typename Func >
void each (flecs::id_t first, flecs::id_t second, const Func &func) const
 Iterate matching pair ids of an entity.
 
template<typename Func >
void each (const flecs::entity_view &rel, const Func &func) const
 Iterate targets for a given relationship.
 
template<typename First , typename Func >
void each (const Func &func) const
 Iterate targets for a given relationship.
 
template<typename Func >
void children (flecs::entity_t rel, Func &&func) const
 Iterate children for entity.
 
template<typename Rel , typename Func >
void children (Func &&func) const
 Iterate children for entity.
 
template<typename Func >
void children (Func &&func) const
 Iterate children for entity.
 
template<typename T , if_t< is_actual< T >::value > = 0>
const T * get () const
 Get component value.
 
template<typename T , typename A = actual_type_t<T>, if_t< flecs::is_pair< T >::value > = 0>
const A * get () const
 Get component value.
 
template<typename First , typename Second , typename P = pair<First, Second>, typename A = actual_type_t<P>, if_not_t< flecs::is_pair< First >::value > = 0>
const A * get () const
 Get a pair.
 
template<typename First , typename Second , if_not_t< is_enum< Second >::value > = 0>
const First * get (Second second) const
 Get a pair.
 
template<typename First , typename Second , if_t< is_enum< Second >::value > = 0>
const First * get (Second constant) const
 Get a pair.
 
const void * get (flecs::id_t comp) const
 Get component value (untyped).
 
const void * get (flecs::entity_t first, flecs::entity_t second) const
 Get a pair (untyped).
 
template<typename Func , if_t< is_callable< Func >::value > = 0>
bool get (const Func &func) const
 Get 1..N components.
 
template<typename T , if_t< is_enum< T >::value > = 0>
const T * get () const
 Get enum constant.
 
template<typename Second >
const Second * get_second (flecs::entity_t first) const
 Get the second part for a pair.
 
template<typename First , typename Second >
const Second * get_second () const
 Get the second part for a pair.
 
template<typename T , if_t< is_actual< T >::value > = 0>
T * get_mut () const
 Get mutable component value.
 
template<typename T , typename A = actual_type_t<T>, if_t< flecs::is_pair< T >::value > = 0>
A * get_mut () const
 Get mutable component value.
 
template<typename First , typename Second , typename P = pair<First, Second>, typename A = actual_type_t<P>, if_not_t< flecs::is_pair< First >::value > = 0>
A * get_mut () const
 Get a mutable pair.
 
template<typename First , typename Second , if_not_t< is_enum< Second >::value > = 0>
First * get_mut (Second second) const
 Get a mutable pair.
 
template<typename First , typename Second , if_t< is_enum< Second >::value > = 0>
First * get_mut (Second constant) const
 Get a mutable pair.
 
void * get_mut (flecs::id_t comp) const
 Get mutable component value (untyped).
 
void * get_mut (flecs::entity_t first, flecs::entity_t second) const
 Get a mutable pair (untyped).
 
template<typename Second >
Second * get_mut_second (flecs::entity_t first) const
 Get the second part for a pair.
 
template<typename First , typename Second >
Second * get_mut_second () const
 Get the second part for a pair.
 
template<typename First >
flecs::entity target (int32_t index=0) const
 Get target for a given pair.
 
flecs::entity target (flecs::entity_t first, int32_t index=0) const
 Get target for a given pair.
 
flecs::entity target_for (flecs::entity_t relationship, flecs::id_t id) const
 Get the target of a pair for a given relationship id.
 
template<typename T >
flecs::entity target_for (flecs::entity_t relationship) const
 
template<typename First , typename Second >
flecs::entity target_for (flecs::entity_t relationship) const
 
int32_t depth (flecs::entity_t rel) const
 Get depth for given relationship.
 
template<typename Rel >
int32_t depth () const
 Get depth for given relationship.
 
flecs::entity parent () const
 Get parent of entity.
 
flecs::entity lookup (const char *path, bool search_path=false) const
 Lookup an entity by name.
 
bool has (flecs::id_t e) const
 Check if entity has the provided entity.
 
template<typename T >
bool has () const
 Check if entity has the provided component.
 
template<typename E , if_t< is_enum< E >::value > = 0>
bool has (E value) const
 Check if entity has the provided enum constant.
 
template<typename First , typename Second >
bool has () const
 Check if entity has the provided pair.
 
template<typename First , typename Second , if_not_t< is_enum< Second >::value > = 0>
bool has (Second second) const
 Check if entity has the provided pair.
 
template<typename Second >
bool has_second (flecs::entity_t first) const
 Check if entity has the provided pair.
 
template<typename First , typename E , if_t< is_enum< E >::value > = 0>
bool has (E value) const
 Check if entity has the provided pair.
 
bool has (flecs::id_t first, flecs::id_t second) const
 Check if entity has the provided pair.
 
bool owns (flecs::id_t e) const
 Check if entity owns the provided entity.
 
template<typename First >
bool owns (flecs::id_t second) const
 Check if entity owns the provided pair.
 
bool owns (flecs::id_t first, flecs::id_t second) const
 Check if entity owns the provided pair.
 
template<typename T >
bool owns () const
 Check if entity owns the provided component.
 
template<typename First , typename Second >
bool owns () const
 Check if entity owns the provided pair.
 
bool enabled (flecs::id_t id) const
 Test if id is enabled.
 
template<typename T >
bool enabled () const
 Test if component is enabled.
 
bool enabled (flecs::id_t first, flecs::id_t second) const
 Test if pair is enabled.
 
template<typename First >
bool enabled (flecs::id_t second) const
 Test if pair is enabled.
 
template<typename First , typename Second >
bool enabled () const
 Test if pair is enabled.
 
flecs::entity clone (bool clone_value=true, flecs::entity_t dst_id=0) const
 
flecs::entity mut (const flecs::world &stage) const
 Return mutable entity handle for current stage When an entity handle created from the world is used while the world is in staged mode, it will only allow for readonly operations since structural changes are not allowed on the world while in staged mode.
 
flecs::entity mut (const flecs::iter &it) const
 Same as mut(world), but for iterator.
 
flecs::entity mut (const flecs::entity_view &e) const
 Same as mut(world), but for entity.
 
int32_t alert_count (flecs::entity_t alert=0) const
 Return number of alerts for entity.
 
const char * doc_name () const
 Get human readable name.
 
const char * doc_brief () const
 Get brief description.
 
const char * doc_detail () const
 Get detailed description.
 
const char * doc_link () const
 Get link to external documentation.
 
const char * doc_color () const
 Get color.
 
const char * doc_uuid () const
 Get UUID.
 
template<typename E >
to_constant () const
 Convert entity to enum constant.
 
void emit (flecs::entity_t evt) const
 Emit event for entity.
 
void emit (flecs::entity evt) const
 Emit event for entity.
 
template<typename Evt , if_t< is_empty< Evt >::value > = 0>
void emit () const
 Emit event for entity.
 
template<typename Evt , if_not_t< is_empty< Evt >::value > = 0>
void emit (const Evt &payload) const
 Emit event with payload for entity.
 
void enqueue (flecs::entity_t evt) const
 Enqueue event for entity.
 
void enqueue (flecs::entity evt) const
 Enqueue event for entity.
 
template<typename Evt , if_t< is_empty< Evt >::value > = 0>
void enqueue () const
 Enqueue event for entity.
 
template<typename Evt , if_not_t< is_empty< Evt >::value > = 0>
void enqueue (const Evt &payload) const
 Enqueue event with payload for entity.
 
flecs::string to_json (const flecs::entity_to_json_desc_t *desc=nullptr) const
 Serialize entity to JSON.
 
const Self & unit (const char *symbol, flecs::entity_t prefix=0, flecs::entity_t base=0, flecs::entity_t over=0, int32_t factor=0, int32_t power=0) const
 Make entity a unit.
 
- Public Member Functions inherited from flecs::id
 id (flecs::id_t value)
 
 id (flecs::world_t *world, flecs::id_t value=0)
 
 id (flecs::world_t *world, flecs::id_t first, flecs::id_t second)
 
 id (flecs::world_t *world, const char *expr)
 
 id (flecs::id_t first, flecs::id_t second)
 
 id (const flecs::id &first, const flecs::id &second)
 
bool is_pair () const
 Test if id is pair (has first, second)
 
bool is_wildcard () const
 Test if id is a wildcard.
 
bool is_entity () const
 Test if id is entity.
 
flecs::entity entity () const
 Return id as entity (only allowed when id is valid entity)
 
flecs::entity add_flags (flecs::id_t flags) const
 Return id with role added.
 
flecs::entity remove_flags (flecs::id_t flags) const
 Return id with role removed.
 
flecs::entity remove_flags () const
 Return id without role.
 
flecs::entity remove_generation () const
 Return id without role.
 
flecs::entity type_id () const
 Return component type of id.
 
bool has_flags (flecs::id_t flags) const
 Test if id has specified role.
 
bool has_flags () const
 Test if id has any role.
 
flecs::entity flags () const
 Return id flags set on id.
 
bool has_relation (flecs::id_t first) const
 Test if id has specified first.
 
flecs::entity first () const
 Get first element from a pair.
 
flecs::entity second () const
 Get second element from a pair.
 
flecs::string str () const
 
flecs::string flags_str () const
 Convert role of id to string.
 
flecs::id_t raw_id () const
 Return flecs::id_t value.
 
 operator flecs::id_t () const
 
flecs::world world () const
 

Additional Inherited Members

- Static Public Member Functions inherited from flecs::entity
static flecs::entity null (const flecs::world_t *world)
 Entity id 0.
 
static flecs::entity null ()
 
- Protected Member Functions inherited from flecs::entity_builder< entity >
const entityto_base () const
 
- Protected Attributes inherited from flecs::id
flecs::world_t * world_
 
flecs::id_t id_
 

Detailed Description

Definition at line 13 of file impl.hpp.

Constructor & Destructor Documentation

◆ observer() [1/2]

flecs::observer::observer ( )
inlineexplicit

Definition at line 17 of file impl.hpp.

◆ observer() [2/2]

flecs::observer::observer ( flecs::world_t * world,
ecs_observer_desc_t * desc )
inline

Definition at line 19 of file impl.hpp.

Member Function Documentation

◆ ctx() [1/2]

void * flecs::observer::ctx ( ) const
inline

Definition at line 31 of file impl.hpp.

◆ ctx() [2/2]

void flecs::observer::ctx ( void * ctx)
inline

Definition at line 24 of file impl.hpp.

◆ entity() [1/5]

flecs::entity::entity ( )
inline

Definition at line 31 of file entity.hpp.

◆ entity() [2/5]

flecs::entity::entity ( const flecs::world_t * world,
flecs::entity_t id )
inlineexplicit

Wrap an existing entity id.

Parameters
worldThe world in which the entity is created.
idThe entity id.

Definition at line 54 of file entity.hpp.

◆ entity() [3/5]

flecs::entity::entity ( entity_t id)
inlineexplicit

Conversion from flecs::entity_t to flecs::entity.

Parameters
idThe entity_t value to convert.

Definition at line 84 of file entity.hpp.

◆ entity() [4/5]

flecs::entity::entity ( world_t * world)
inlineexplicit

Create entity.

Parameters
worldThe world in which to create the entity.

Definition at line 37 of file entity.hpp.

◆ entity() [5/5]

flecs::entity::entity ( world_t * world,
const char * name )
inlineexplicit

Create a named entity.

Named entities can be looked up with the lookup functions. Entity names may be scoped, where each element in the name is separated by "::". For example: "Foo::Bar". If parts of the hierarchy in the scoped name do not yet exist, they will be automatically created.

Parameters
worldThe world in which to create the entity.
nameThe entity name.

Definition at line 68 of file entity.hpp.

◆ query()

flecs::query flecs::observer::query ( ) const
inline

Definition at line 35 of file impl.hpp.


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