Concepts

This section covers key concepts of EntitasRedux and their practical applications.

• Contexts A Context manages the lifecycle of entities and groups and maintains pools of components.
• Components A Component is a unit-of-data that can be added to, removed from, or replaced on an Entity.
• Entities An Entity is an distinct, simple object defined by a unique identifier and zero or more Components. An Entity is always created from a Context.
• Systems A System implements behavior for zero or more Entities in a Context. Different interface types for systems enable them to be executed at specific interval rates (Update, Fixed Update, etc...) or in reaction to changes in components on an entity.
• Groups A Group contains a collection of entities to track defined by an simple query syntax from a Matcher.
• Entity Indexes An EntityIndex enables a group where one or more entities can be searched for by way of an index value or key. A PrimaryEntityIndex enables grouping where only one Entity can be associated with a distinct index value or key.