ecstasy

A GHC.Generics based entity component system.

LTS Haskell 21.23:	0.2.1.0
Stackage Nightly 2023-12-05:	0.2.1.0
Latest on Hackage:	0.2.1.0

See all snapshots ecstasy appears in

BSD-3-Clause licensed by Sandy Maguire

Maintained by sandy@sandymaguire.me

This version can be pinned in stack with:ecstasy-0.2.1.0@sha256:8f3d70c98de20d891f261b9047303f5bc545bcf9ddf0b2a0b17e1c29950b834b,1565

Module documentation for 0.2.1.0

Data
- Data.Ecstasy
  - Data.Ecstasy.Internal
    - Data.Ecstasy.Internal.Deriving
  - Data.Ecstasy.Types

Depends on 5 packages(full list with versions):

base, containers, kan-extensions, mtl, transformers

Ecstasy is an entity-component system for Haskell. It's inspired by apecs, but makes the design decision to focus on being idiomatic rather than being fast. Maybe. I haven't actually benchmarked it.

We achieve being idiomatic by using GHC.Generics and tricky type families to derive performant data stores given only a record of the desired components.

Changes

Revision history for ecstasy

0.2.1.0 – 2018-05-15

Added the ‘surgery’ function to introduce temporary effects.
Significant performance improvements due to constructing monadic generic functions via ‘Codensity’.

0.2.0.1 – 2018-05-10

Also export ‘StorageType’.

0.2.0.0 – 2018-05-10

Renamed ‘get*’ to ‘query*’.
Renamed ‘newEntity’ to ‘createEntity’.
Renamed ‘defEntity’ to ‘newEntity’.
Renamed ‘defEntity’’ to ‘unchanged’.
Renamed ‘defWorld’ to ‘defStorage’.
Significant performance improvements.
Added a ‘Virtual’ component type, allowing for easy integration with systems that own their own data. Getting and setting on ‘Virtual’ components dispatch as actions in the underlying monad stack.
Added proper type wrappers around ‘SystemT’ and ‘QueryT’ so they don’t eat up valuable mtl instances.
Removed the ‘Ent’ parameter from the ‘efor’ callback, since this can now be gotten in any ‘QueryT’ context via ‘queryEnt’.
Parameterized ‘emap’ and ‘efor’ by an ‘EntityTarget’, which allows for calling these functions over specific groups of entities.
Added ‘eover’: a combination of ‘emap’ and ‘efor’.

0.1.1.0 – 2018-02-18

Added ‘deleteEntity’ (function) and ‘delEntity’ (QueryT setter).

0.1.0.1 – 2018-02-14

Added ‘yieldSystemT’ for resuming a ‘SystemT’ computation later.
Bumped the upper bound on ‘base’ to 5 (thanks to nek0).

0.1.0.0 – 2017-12-27

First version. Released on an unsuspecting world.