Topics

Here is a list of all topics with brief descriptions:

C API
Core	Core ECS functionality (entities, storage, queries)
API defines	Defines for customizing compile-time features
Core API Types	Types for core API objects
API types	Public API types
Function types.	Function callback types
Query descriptor types.	Types used to describe queries
Miscellaneous types	Types used to create entities, observers, queries, and more
Built-in component types.	Types that represent built-in components
API Constants	Public API constants
Component ID flags.	ID flags are bits that can be set on an ID (ecs_id_t)
Built-in component IDs.
World	Functions for working with ecs_world_t
Creation & Deletion
Commands
Misc
Entities	Functions for working with ecs_entity_t
Creating & Deleting	Functions for creating and deleting entities
Adding & Removing	Functions for adding and removing components
Enabling & Disabling	Functions for enabling/disabling entities and components
Getting and Setting	Functions for getting and setting components
Entity Liveliness	Functions for testing and modifying entity liveliness
Entity Information.	Get information from an entity
Entity Names	Functions for working with entity names and paths
Components	Functions for registering and working with components
IDs	Functions for working with ecs_id_t
Queries	Functions for working with ecs_term_t and ecs_query_t
Each iterator	Find all entities that have a single (component) ID
Observers	Functions for working with events and observers
Iterators	Functions for working with ecs_iter_t
Tables	Functions for working with ecs_table_t
Addons	C APIs for addons
Alerts	Create alerts from monitoring queries
App	Optional addon for running the main application loop
Constraint Traits	Traits that enforce constraints on entities, components and relationships
Doc	Utilities for documenting entities, components, and systems
Entity Ranges	Entity id range management
Frame	Frame management
Http	Simple HTTP server used for serving up the REST API
Json	Functions for serializing to and from JSON
Log	Logging functions
Meta	Flecs reflection framework
Meta Utilities	Macro utilities to automatically insert reflection data
Metrics	Collect user-defined metrics from ECS data
Module	Modules organize components, systems, and more in reusable units of code
OS API Implementation	Default implementation for OS API interface
Pipeline	Pipelines order and schedule systems for execution
Rest	REST API for querying and mutating entities
Flecs script	DSL for loading scenes, assets, and configuration
Stats	Collection of statistics for world, queries, systems, and pipelines
System	Systems are a query + function that can be run manually or by a pipeline
Timer	Run systems at a time interval
Units.	Common unit annotations for reflection framework
Prefixes	Prefixes to indicate unit count (e.g., Kilo, Mega)
Duration
Time
Mass
Electric Current
Amount
Luminous Intensity
Force
Length
Pressure
Speed
Temperature
Data
Data Rate
Angle
Frequency
Uri
Color
OS API	Interface for providing OS-specific functionality
Macro API	Convenience macros for C API
Creation macros	Convenience macros for creating entities, components, and observers
Type-Safe API	Macros that wrap around core functions to provide a "type-safe" API in C
Entity API
Creation & Deletion
Adding & Removing
Getting & Setting
Singletons
Has, Owns, Shares
Enabling & Disabling
Entity Names
Component API
ID API
Iterator API
Table API
Value API
Table sorting	Convenience macros for sorting tables
Misc	Misc convenience macros
C++ API
Core	Core ECS functionality (entities, storage, queries)
API Types and Globals	Types and constants bridged from C API
Components	Registering and working with components
Entities	Entity operations
Fields	Field helper types
Iterators	Iterator operations
IDs	Class for working with entity, component, tag, and pair IDs
Observers	Observers let applications register callbacks for ECS events
Queries
Sparse queries	Direct iteration of sparse component storages
Pair type	Compile-time utilities for working with relationship pairs
Refs	Refs are a fast mechanism for referring to a specific entity/component
Tables	Table operations
Types	Type operations
World	World operations
Addons	C++ APIs for addons
Logging	Logging functions
Alerts	Alert implementation
App	Optional addon for running the main application loop
Doc	Utilities for documenting entities, components, and systems
Entity Ranges	Entity id range management
Events	API for emitting events
Frame	Frame management
Json	Functions for serializing to/from JSON
Meta	Flecs reflection framework
Metrics	The metrics module extracts metrics from components and makes them available through a unified component interface
Modules	Modules organize components, systems, and more in reusable units of code
Pipelines	Pipelines order and schedule systems for execution
Rest	REST API for querying and mutating entities
Script	Data definition format for loading entity data
Stats	The stats addon tracks statistics for the world and systems
Systems	Systems are a query and a function that can be run manually or by a pipeline
Timer	Run systems at a time interval
Units	Common unit annotations for reflection framework
Prefixes	Prefixes to indicate unit count (e.g., Kilo, Mega)
Quantities	Quantities that group units (e.g., Length)
Duration
Angle
Time
Mass
Electric Current
Amount
Luminous Intensity
Force
Length
Pressure
Speed
Temperature
Data
Data Rate
Frequency
Uri
Color