X-Git-Url: https://git.xandkar.net/?a=blobdiff_plain;f=polymorphic-life%2F001%2Fsrc%2Fpolymorphic_life.ml;h=e25bbf623bb4ac49afc6447916e953ecd04c2f44;hb=0ce0e7980a7b2b94b646d063127f064290340cfa;hp=ca6d819c1f4364026b5c643d1723fcac69c02040;hpb=da8f1674316dfc43fb0eb87e5f9d09b2cc942374;p=cellular-automata.git

diff --git a/polymorphic-life/001/src/polymorphic_life.ml b/polymorphic-life/001/src/polymorphic_life.ml
index ca6d819..e25bbf6 100644
--- a/polymorphic-life/001/src/polymorphic_life.ml
+++ b/polymorphic-life/001/src/polymorphic_life.ml
@@ -13,6 +13,8 @@ module type MATRIX = sig
   val map : 'a t -> f:(row:int -> col:int -> data:'a -> 'b) -> 'b t
 
   val iter : 'a t -> f:(row:int -> col:int -> data:'a -> unit) -> unit
+
+  val print : 'a t -> to_string:('a -> string) -> unit
 end
 
 module Matrix : MATRIX = struct
@@ -30,6 +32,13 @@ module Matrix : MATRIX = struct
         )
     )
 
+  let print t ~to_string =
+    Array.iter t ~f:(
+      fun row ->
+        Array.iter row ~f:(fun x -> printf "%s" (to_string x));
+        print_newline ()
+    )
+
   let map t ~f =
     Array.mapi t ~f:(
       fun row cols ->
@@ -50,17 +59,63 @@ end
 module type CELL = sig
   type t
 
+  val init : unit -> t
+
+  val to_string : t -> string
+
   val state : t -> int
 
   val react : t -> states:int list -> t
 end
 
 
-let main () =
-  let pool = Matrix.create ~rows:5 ~cols:5 ~data:() in
-  Matrix.iter pool ~f:(
-    fun ~row ~col ~data:() -> printf "R: %d, K: %d\n" row col
-  )
+module Conway : CELL = struct
+  type t = D | A
+
+  let of_int = function
+    | 0 -> D
+    | 1 -> A
+    | _ -> assert false
+
+  let to_int = function
+    | D -> 0
+    | A -> 1
+
+  let to_string = function
+    | D -> " "
+    | A -> "o"
+
+  let init () = Random.int 2 |> of_int
+
+  let state = to_int
+
+  let react t ~states =
+    let live_neighbors = List.fold_left states ~init:0 ~f:(+) in
+    match t with
+    | A when live_neighbors < 2 -> D
+    | A when live_neighbors < 4 -> A
+    | A when live_neighbors > 3 -> D
+    | D when live_neighbors = 3 -> A
+    | t -> t
+end
+
+
+let main rows cols () =
+  Random.self_init ();
+  let init ~row:_ ~col:_ ~data = Conway.init data in
+  let grid = Matrix.create ~rows ~cols ~data:() |> Matrix.map ~f:init in
+  Matrix.print grid ~to_string:Conway.to_string
+
+
+let spec =
+  let summary = "Polymorphic Cellular Automata" in
+  let spec =
+    let open Command.Spec in
+    empty
+    +> flag "-rows" (optional_with_default 5 int) ~doc:"Height"
+    +> flag "-cols" (optional_with_default 5 int) ~doc:"Width"
+  in
+  Command.basic ~summary spec main
 
 
-let () = main ()
+let () = Command.run spec