Clojure CES Engine

ces-clj is a project to create a Component Entity System in as few lines of code (LOC) as possible.

;; add dependencies
(set-env! :dependencies '[[degree9/ces-clj "0.1.0"]])

;; require in namespace
(:require [lounge-clj :as lounge])

Components are small independant reusable bit's of state which can be attached to Entities. These bit's of state are implemented as hash-maps.

Entities consist of a universally unique name associated to a collection of Components. Entities are implemented as a vector containing: a) a UUID b) Vector of Components

Systems are small independant functions which act upon the global environment of Entities, and optionally mutate state.

There are three (3) main macro's in lounge-clj each returns a new function.

(def env (atom [])) #'lounge-clj/env

(component comp1 [a b c] :a a :b b :c c) #'lounge-clj/comp1

(comp1 "argA" "argB" "argC") #{:a "argA", :name "comp1", :c "argC", :b "argB"}

(entity ent1 (comp1 "argA" "argB" "argC")) #'lounge-clj/ent1

(system sys1 identity) #'lounge-clj/sys1

(reset! env (conj @env (ent1)))

(-> env
  sys1)