Add and rename REPL functions

src/play_clj/repl.clj

@@ -1,26 +1,45 @@
 (ns play-clj.repl
   (:require [play-clj.core :refer :all]))
 
-(defn entities
+(defn s
+  "Returns the screen map in `screen-object`.
+
+    (s main-screen)"
+  [screen-object]
+  (-> screen-object :screen deref))
+
+(defn s!
+  "Associates values to the screen map in `screen-object`. Returns the new
+screen map.
+
+    (s! main-screen :camera (orthographic))"
+  [screen-object & args]
+  (apply swap! (:screen screen-object) assoc args))
+
+(defn e
   "Returns the entities in `screen-object`, optionally filtered by a supplied
 function.
 
-    (entities main-screen :player)"
+    (e main-screen :player)"
   ([screen-object]
     (-> screen-object :entities deref))
   ([screen-object filter-fn]
-    (filter filter-fn (entities screen-object))))
+    (filter filter-fn (e screen-object))))
 
-(defn entities!
-  "Associates values to the entities in `screen-object` that match the supplied
-function.
+(defn e!
+  "Resets the entities in `screen-object`, or associates values to the entities
+in `screen-object` that match the supplied function. Returns the entities that
+were changed.
 
-    (entities! main-screen :player :health 10)"
-  [screen-object filter-fn & args]
-  (on-gl (swap! (:entities screen-object)
-                (fn [entities]
-                  (for [e entities]
-                    (if (filter-fn e)
-                      (apply assoc e args)
-                      e)))))
-  (entities screen-object filter-fn))
+    (e! main-screen [])
+    (e! main-screen :player :health 10)"
+  ([screen-object new-entities]
+    (reset! (:entities screen-object) new-entities))
+  ([screen-object filter-fn & args]
+    (swap! (:entities screen-object)
+           (fn [entities]
+             (for [e entities]
+               (if (filter-fn e)
+                 (apply assoc e args)
+                 e))))
+    (e screen-object filter-fn)))