SanderMertens/flecs

Features

• Entity Component Assignment - Attaches tags and data-carrying components to entities, including support for default-constructed values.
• Entity Component Systems - Implements a high-performance entity component system using data-oriented design and contiguous memory layout.
• Extensible Component Architectures - Implements an extensible component architecture that decouples state from behavior using the ECS pattern.
• Entity Hierarchy Management - Allows creating parent-child relationships to organize simulation data and propagate changes down the entity tree.
• Batch Processing - Performs high-performance bulk logic execution across entities sharing specific components.
• Custom Data Types - Allows the definition of custom primitives, enums, and structs to describe data layout.
• Unique Identifier Generators - Generates unique identifiers that serve as handles for attaching and managing simulation data.
• Entity Inheritance - Supports marking components as inheritable so queries automatically include entities that inherit them.
• Recursive Deletion - Provides recursive entity cleanup that deletes descendants in depth-last order to prevent orphaned children.
• Entity Relationships - Provides the ability to associate entities via specific relationship types to create directed links.
• Cascade Deletions - Implements cascading deletions to automatically remove child entities when a parent entity is deleted.
• Hierarchy Construction - Implements parent-child relationships that enable cascading deletions and efficient path-based entity lookups.
• Entity CRUD Management - Provides tools for creating, modifying, and managing the lifecycle of entities and their component assignments.
• Entity Identifier Recycling - Removes entities from the world and marks their identifiers for future recycling to maintain memory efficiency.
• Liveliness Verification - Implements checks to verify if an entity identifier is currently active or has been recycled.
• ECS Entity Querying - Provides high-performance filtering and iteration over massive entity sets using cached queries and multi-threaded pipelines.
• Runtime Metadata Inspectors - Implements a meta-programming layer for analyzing and modifying object models and types during execution.
• Query Expression Caching - Implements high-performance cached queries for finding entities matching specific component expressions.
• Read-Only Access Modes - Controls component access by designating whether matched components are read-only or read-write.
• Component Constraint Queries - Provides high-performance searching for entities that match specific sets of component or tag constraints.
• Entity Filtering Tools - Provides tools for searching, querying, and narrowing down entities based on assigned components.
• Parallel Execution - Implements parallel execution by distributing simulation data across multiple worker threads or external task systems.
• System Pipeline Configuration - Provides specialized sequences of systems using custom queries and ordering logic instead of defaults.
• Component Possession Checks - Provides mechanisms to verify if a Flecs entity contains specific components or flags.
• Component Set Matching - Identifies groups of entities possessing a specific set of components for bulk operations.
• Data-Oriented Design Libraries - Organizes simulation data into contiguous memory layouts to optimize CPU cache usage and performance.
• Deferred Command Encoders - Buffers structural modifications as commands during iteration to prevent memory corruption and improve throughput.
• Component Filtering - Provides the ability to include or exclude specific components during a query to refine results.
• Entity Definitions - Provides mechanisms for creating entities with identifiers and optional names to serve as basic simulation building blocks.
• Entity Iterators - Provides high-performance batch-oriented iterators and per-entity callbacks for processing entities that match specific queries.
• Entity Naming - Allows assigning unique names to entities within a scope to enable fast path-based lookups.
• Entity Queries - Implements advanced searching for entities using component criteria and relationship traversal.
• Entity Templates - Provides reusable blueprints for entities that ensure consistency across multiple instances.
• Prefab Instantiation - Allows copying entire subtrees of child entities from a prefab template to an instance.
• Simulation State Management - Manages entity lifecycles and simulation state to maintain consistency in real-time interactive applications.
• Relationship Lookups - Provides high-performance lookup of target entities associated with specific relationship pairs.
• Relationship Queries - Supports high-performance traversal of directed links between entities to find related data.
• Relationship Traversal - Enables matching components by following relationship links up or down an entity hierarchy.
• Scene Hierarchy Structuring - Organizes game objects and entities into nested tree structures for runtime scene management.
• Scripted Logic Systems - Implements logic loops that operate on groups of entities according to a defined pipeline.
• Simulation Engine Cores - Provides a framework for executing ordered pipelines of logic and queries to advance the state of a virtual world.
• Simulation Worlds - Manages the global simulation environment including target FPS, time scales, and thread counts.
• Lifetime Management - Provides mechanisms to control entity persistence and prevent premature deletion of child objects.
• Recycling - Implements a system for creating, removing, and recycling entities to optimize simulation object tracking.
• Simulation State Integration - Advances the simulation world state by one timestep to process registered systems and update data.
• Embedded Logic Evaluation - Parses and evaluates expressions and functions to execute dynamic logic within the simulation.
• External Script Execution - Runs external script files or inline code snippets to extend functionality without needing to recompile.
• Multi-threaded Execution - Distributes independent system tasks across multiple CPU cores using read-write access modifiers to prevent race conditions.
• Runtime Data Inspection - Allows reading and writing component values using a cursor without requiring types at compile time.
• Scripting Runtimes - Integrates scripting capabilities to define entity behavior and simulation logic dynamically.
• Path-Based Resolution - Enables resolving entity identifiers using namespaced path strings relative to parent entities.
• Application Loops - Provides a main application loop with frame-based execution and custom start/end actions.
• Archetype-Based Storage - Stores entities with the same component set in contiguous memory arrays to enable fast linear iteration.
• Entity Managers - Tracks the creation and destruction of entities to trigger reactive logic and observer callbacks.
• Component Data Management - Provides core functionality for managing component data associated with entities.
• Component Data Retrieval - Implements high-performance retrieval of component and entity data.
• Component Lifecycle Management - Handles the registration and lifecycle of components across entities.
• Component-Based Retrieval - Enables filtering and retrieving sets of entities based on component requirements for batch processing.
• Deferred Command Buffering - Records modifications to entities in blocks and executes them atomically to avoid corrupting memory during system iteration.
• ECS Libraries - A high-performance library for managing large numbers of objects through component-based data organization.
• ECS System Definitions - Combines queries and callback functions to perform logic on matching entities within the ECS.
• Event-Driven Callbacks - Implements an event-driven observer pattern to trigger reactive logic upon component changes.
• Execution Schedulers - Implements a scheduler that decouples the timing and ordering of system execution from the main loop.
• Request Lifecycle Phases - Executes logic across entities organized into sequenced pipeline phases.
• Execution Phases - Provides a mechanism to group systems into named phases to ensure a strict execution order every tick.
• Execution Pipelines - Allows the organization of systems into ordered phases and pipelines for reusable logic modules.
• Memory Access Modifiers - Specifies whether components in a query are read-only, write-only, or read-write to optimize system scheduling.
• Metadata Reflection Frameworks - Provides a framework for attaching and retrieving reflection metadata to entities and components for dynamic inspection.
• Phase-Based Scheduling - Organizes systems into ordered execution phases to manage logic flow and handle data dependencies.
• Game Object Architectures - Enables building complex entity hierarchies and relationships using a decoupled component-based approach.
• Event-Driven Observers - Implements observers that trigger functions in response to specific changes in the simulation world.
• Change Observers - Provides mechanisms for monitoring reactive state and triggering callbacks when components are modified.
• Entity Presence Verification - Enables verifying whether an entity possesses a specific component or relationship to determine its state.
• Tagging - Supports attaching empty tag components to entities for efficient categorization and query filtering.
• Batch Data Assignment - Provides a context statement to apply the same set of components to multiple entities simultaneously.
• Complex Data Serialization - Supports mapping complex, non-primitive data types to describable structures using custom serialization functions.
• Component Inheritance Management - Controls whether components are inherited or overridden when instantiating entities from prefabs.
• Property Overrides - Uses specialized relationships to allow entities to inherit from others while overriding specific component values.
• Entity Disabling - Prevents entities from being matched by queries or systems without removing them from the simulation world.
• Entity Exclusion Filters - Implements exclusion operators to filter out entities that possess specific components or patterns.
• Transitive Relationships - Matches entities through chains of relationships where a connection is implied by intermediate links.
• Entity Tracking - Records execution statistics and performance metrics for specific entities and systems.
• Identity Filtering - Constrains matches using equality, inequality, or fuzzy name matching against specific entities.
• Lifecycle Script Execution - Manages the lifecycle of scripts, including one-time execution and repeated evaluation of entity behavior.
• Live Script Execution - Enables the immediate execution of scripts within a running simulation to trigger state changes.
• Component Member Filtering - Filters entities based on specific values stored within component members that hold entity references.
• DSL Scene Loading - Uses a domain-specific language to load assets and complex entity hierarchies into the world.
• Command Buffers - Uses command buffers to queue structural changes safely, preventing memory corruption during system iteration.
• Entity Views - Allows creating efficient filtered views of entities for high-performance bulk processing.
• Prefab Filtering - Enables matching entities by comparing their component sets against prefabs or other entities.
• Instantiation Behavior Control - Determines whether components are copied, inherited, or ignored when instantiating from a prefab.
• Procedural Instantiation - Provides parameterized blueprints that generate complex entity hierarchies upon instantiation.
• Query Result Iterators - Implements high-performance iteration over matching entities using nested loops over archetype tables for direct component array access.
• Relationship State - Allows associating component types with relationship pairs so that the link itself can store state.
• Relative Entity Matching - Supports matching child entities by name relative to a matched entity to evaluate conditions.
• Component Dependencies - Establishes requirements to ensure necessary components or entities are present before a system processes an entity.
• Simulation State Serialization - Provides systems for saving and restoring the complete state of the simulation world.
• System Activation Toggles - Allows enabling or disabling specific systems to exclude them from the execution pipeline.
• System Execution Control - Allows suspending and resuming systems to precisely control logic timing during the simulation loop.
• Expression Evaluators - Provides an engine for computing values using mathematical operators and conditional matches to assign component data.
• Feature - Groups related components and systems into modules with dependency tracking.
• Timer Schedulers - Tracks time-based state and schedules events for entities to trigger actions after a duration.
• Reflective Metadata Programming - Provides runtime reflection and metadata to allow dynamic data inspection and scripting.
• Command Sync Points - Allows flushing enqueued structural commands before system execution to ensure they operate on the most recent state.
• Component Change Tracking - Provides the ability to filter query results to identify entities that modified specific components since the last update.
• Component Lifecycle Hooks - Provides custom logic hooks that trigger during the addition, removal, or replacement of components.
• Component Registration - Allows defining Flecs component types at compile-time or runtime for association with entities.
• Component State Toggling - Allows entities to be dynamically included or excluded from systems via component toggling.
• Component Visibility Toggling - Provides a way to hide components from queries without deleting the data.
• Concurrency Controls - Manages exclusive access to the world state to ensure thread-safe modifications during simulation.
• Entity - Implements conditional query branching to evaluate subsequent terms only if a preceding variable was set.
• Fixed-Rate System Scheduling - Runs systems at specific time intervals or fixed rates instead of every single frame.
• Singleton Patterns - Implements singleton patterns to store shared global state across the simulation world.
• Singleton Component Storage - Provides a special singleton entity for storing and accessing shared world state.
• Entity Metadata Configuration - Assigns names, aliases, and UUIDs to entities to improve organization and discoverability.
• Event Triggering - Provides mechanisms for programmatically emitting and enqueuing events to notify the system of entity changes.
• Isolated World Modules - Groups components, systems, and observers into isolated units for use across different worlds.
• Immediate Execution Modes - Runs systems in non-readonly mode to make structural changes immediately visible to the world.
• Prefab Variants - Implements inheritance between prefabs to create specialized versions of entity templates.
• Reactive Change Detection - Implements a system to monitor data modifications and skip processing for queries where state has not changed.
• Resource Management Hooks - Provides callbacks for component lifecycle events such as construction and destruction.
• Reusable Component Architectures - Groups components and systems into reusable units for better project structure.
• State Change Triggers - Provides signals to notify observers and systems that a specific state change or custom event has occurred.
• Decoupled Feature Packaging - Groups components and systems into decoupled units that can be imported to maintain execution order.
• Sparse-Set Storage - Stores rarely used components in separate maps to avoid wasting memory in dense archetype tables.
• Global Component Access - Enables seamless access to global shared state without referencing specific entities.
• Query Membership Events - Fires events when an entity starts or stops matching a specific query.
• Memory Usage Analyzers - Retrieves memory statistics and footprints for entities, components, and tables.
• Observer Trigger Filters - Provides logic to filter observer triggers based on the existence or change of specific component terms.
• Metric and Performance Monitors - Monitors memory usage and performance statistics specifically for components and entities.
• Delta-Time Integrations - Calculates elapsed time between frames to ensure consistent movement and physics simulation across different hardware.
• Remote Administration Interfaces - Offers a REST API and network interface for remote administration and inspection of the simulation state.
• Performance Analysis - Provides runtime statistics for pipelines, systems, and queries to measure operational performance.
• Entity Tree Traversal - Provides depth-first and breadth-first traversal patterns to iterate through children of a parent entity.
• Custom Event Emission - Allows the registration and triggering of application-defined custom events to execute specialized logic.
• Reactive State Watchers - Triggers automated callbacks and observers in response to component additions, removals, or modifications.
• Deferred Event Queues - Enqueues events into a command queue to be processed later instead of invoking observers immediately.
• Singleton Constraints - Ensures that specific component types remain unique globally across the world.
• ECS Frameworks - Multithreaded C ECS.
• Programming Utilities - Fast and lightweight entity component system for C.
• Windows Environments - Listed in the “Windows Environments” section of the Awesome C awesome list.

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