end
-module type CELL = sig
- type t
+module Msg = struct
+ type t = string
+end
+
+
+module State = struct
+ type t = string
+end
+
+
+module PhenoType = struct
+ type t = string
+end
+
- val create : unit -> t
+module Cell = struct
+ type t = { msg : Msg.t
+ ; pheno : PhenoType.t
+ ; state : State.t
+ }
+end
- val to_string : t -> string
- val state : t -> int
+module type RULE = sig
+ val create : unit -> Cell.t
- val react : t -> states:int list -> t
+ val transition : state:State.t -> inputs:Msg.t list -> Cell.t
end
-module Conway : CELL = struct
- type t = D | A
+module Conway : RULE = struct
+ type state = D | A
- let of_int = function
+ let state_of_string : (string -> state) = function
+ | "D" -> D
+ | "A" -> A
+ | _ -> assert false
+
+ let state_of_int : (int -> state) = function
| 0 -> D
| 1 -> A
| _ -> assert false
- let to_int = function
+ let int_of_state : (state -> int) = function
| D -> 0
| A -> 1
- let to_string = function
+ let string_of_state : (state -> string) = function
+ | D -> "D"
+ | A -> "A"
+
+ let msg_of_state : (state -> Msg.t) =
+ string_of_state
+
+ let pheno_of_state : (state -> PhenoType.t) = function
| D -> " "
| A -> "o"
- let create () =
- Random.int 2 |> of_int
-
- let state = to_int
+ let int_of_msg msg =
+ msg |> state_of_string |> int_of_state
- let react t ~states =
- let live_neighbors = List.fold_left states ~init:0 ~f:(+) in
- match t with
+ let next state ~live_neighbors =
+ match state 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
| A -> A
| D -> D
+
+ let cell_of_state s =
+ { Cell.msg = s |> msg_of_state
+ ; Cell.pheno = s |> pheno_of_state
+ ; Cell.state = s |> string_of_state
+ }
+
+ let create () =
+ Random.int 2 |> state_of_int |> cell_of_state
+
+ let live_neighbors inputs =
+ inputs |> List.map ~f:int_of_msg |> List.fold_left ~init:0 ~f:(+)
+
+ let transition ~state ~inputs =
+ state
+ |> state_of_string
+ |> next ~live_neighbors:(live_neighbors inputs)
+ |> cell_of_state
end
module Automaton : sig
type t
- val create : rows:int -> columns:int -> interval:float -> t
+ val create : rows:int
+ -> columns:int
+ -> interval:float
+ -> rules: (module RULE) list
+ -> t
val loop : t -> unit
end = struct
- type t = { grid : Conway.t Matrix.t
+ type cell = { data : Cell.t
+ ; rule : (module RULE)
+ }
+
+ type t = { grid : cell Matrix.t
; interval : Time.Span.t
; bar : string
}
- let create ~rows:rs ~columns:ks ~interval =
- { grid = Matrix.map ~f:Conway.create (Matrix.create ~rs ~ks ())
+ let create ~rows:rs ~columns:ks ~interval ~rules =
+ let n = List.length rules in
+ let i = Random.int n in
+ let init () =
+ let rule = List.nth_exn rules i in
+ let module Rule = (val rule : RULE) in
+ { rule
+ ; data = Rule.create ()
+ }
+ in
+ { grid = Matrix.map ~f:init (Matrix.create ~rs ~ks ())
; interval = Time.Span.of_float interval
; bar = String.make ks '-'
}
+ let cell_to_string cell =
+ cell.data.Cell.pheno
+
let print t =
print_endline t.bar;
- Matrix.print t.grid ~to_string:Conway.to_string;
+ Matrix.print t.grid ~to_string:cell_to_string;
print_endline t.bar
let next t =
let grid =
Matrix.mapi t.grid ~f:(
- fun point cell ->
+ fun point {rule; data} ->
+ let module Rule = (val rule : RULE) in
let neighbors = Matrix.get_neighbors t.grid point in
- Conway.react cell ~states:(List.map neighbors ~f:Conway.state)
+ let data =
+ Rule.transition
+ ~state:data.Cell.state
+ ~inputs:(List.map neighbors ~f:(fun cell -> cell.data.Cell.msg))
+ in
+ {rule; data}
)
in
{t with grid}
let main () =
Random.self_init ();
let rows, columns = Or_error.ok_exn Linux_ext.get_terminal_size () in
- Automaton.create ~rows:(rows - 3) ~columns ~interval:0.1 |> Automaton.loop
+ let interval = 0.1 in
+ let rules =
+ [ (module Conway : RULE)
+ ]
+ in
+ Automaton.create ~rows:(rows - 3) ~columns ~interval ~rules |> Automaton.loop
let spec =