• Entities package
  • What's new
• Upgrade guide
• Get started
  • Installation
  • ECS packages
  • ECS workflow examples
    • Introduction to the ECS workflow
    • Starter ECS workflow
    • Authoring and baking workflow
    • Prefab instantiation workflow
• Entity component system concepts
  • Entity component system introduction
  • Entity concepts
  • Component concepts
  • System concepts
  • World concepts
  • Archetype concepts
  • Structural changes concepts
  • Safety in Entities
• Programming in Entities
  • Use the job system in Entities
    • Job system in Entities introduction
    • Job scheduling overhead
    • Job dependencies
  • Organize data with components
    • Component types
      • Unmanaged components
      • Managed components
      • Shared components
        • Shared components introduction
        • Create a shared component
        • Optimize shared components
      • Cleanup components
        • Cleanup components introduction
        • Create a cleanup component
        • Cleanup shared components
      • Tag components
      • Dynamic buffer components
        • Dynamic buffer components introduction
        • Create a dynamic buffer component
        • Set the capacity of a dynamic buffer
        • Access dynamic buffers in a chunk
        • Access dynamic buffers from jobs
        • Modify dynamic buffers with an entity command buffer
        • Reinterpret a dynamic buffer
      • Chunk components
        • Chunk components introduction
        • Create a chunk component
        • Use chunk components
      • Enableable components
        • Enableable components introduction
        • Use enableable components
      • Singleton components
    • Add components to an entity
    • Remove components from an entity
    • Read and write component values
    • Native container component support
  • Systems introduction
    • Systems comparison
    • ISystem overview
    • SystemBase overview
    • System groups
    • Organize system data
    • Reference Unity objects in your code
    • Data granularity
    • Manage systems in multiple worlds
    • Access data
      • Access data on the main thread
      • SystemAPI overview
    • Time considerations
    • Optimize systems
  • Manage structural changes
    • Manage structural changes introduction
    • Defer structural changes
      • Entity command buffer overview
      • Use an entity command buffer
      • Entity command buffer playback
      • Automatic playback and disposal of entity command buffers
    • Manage structural changes with EntityManager
    • Manage structural changes with enableable components
    • Optimize structural changes
  • Iterate over component data
    • Iterate over component data with SystemAPI.Query
    • Iterate over component data with IJobEntity
    • Iterate over chunks of data with IJobChunk
      • Implement IJobChunk
    • Iterate manually over data
    • Iterate over SystemBase component data
      • Define and execute an Entites.ForEach lambda expression
      • Select and access data
      • Filter data
      • Use entity command buffers
    • Query data with an entity query
      • EntityQuery overview
      • Create an EntityQuery
      • EntityQuery filters
      • Write groups
      • Version numbers
    • Look up arbitrary data
  • Transforms
    • Transforms concepts
    • Use transforms
    • Transforms comparison
    • Transform helper overview
    • Transform usage flags
    • Custom transforms
  • Aspect overview
    • Aspect concepts
    • Create an aspect
    • Aspect source generation
  • Store immutable data with blob assets
    • Blob assets concepts
    • Create a blob asset
  • Implement state machines
• Convert data
  • Convert data with baking
    • Baking overview
    • Baking phases
    • Baker overview
    • Baking systems overview
    • Baking worlds overview
    • Filter baking output
    • Prefabs in baking
    • Linked entity groups
  • Scenes overview
    • Subscenes
    • Scene streaming
      • Scene streaming overview
      • Load a scene
      • Scene section overview
      • Scene and section meta entities
      • Scene instancing
• Content management
  • Introduction to content management
  • Weakly reference an object
  • Weakly reference a scene
  • Load a weakly-referenced object at runtime
  • Load a weakly-referenced scene at runtime
  • Create custom content archives
  • Deliver content to an application
• Entities Unity Editor reference
  • Entities Preferences reference
  • Entities Project Settings reference
  • Authoring and runtime data modes
  • Entities windows reference
    • Archetypes window reference
    • Components window
    • Entities Hierarchy window reference
    • Systems window reference
  • Entities Inspectors reference
    • Entity Inspector reference
    • System Inspector reference
    • Component Inspector reference
    • Query window reference
• Performance and debugging
  • Entities performance considerations
    • Manage chunk allocations
    • Manage sync points
  • Entities Profiler modules
    • Entities Profiler modules introduction
    • Entities Structural Changes Profiler module reference
    • Entities Memory Profiler module reference
  • Memory allocators
    • Memory allocators overview
    • Prebuilt custom allocators overview
    • World update allocators
    • Entity command buffer allocators
    • System group allocators
  • Journaling
  • Common error messages