(* Parallel simulation of harmonic oscillators.             *)
(* Illustrates the impact of unrelated parallel simulation. *)

let pi = 3.141592653589793

let hybrid harmonic(p) = x where
  rec der x = v init 1.0
  and der v = -2.0 *. pi *. x /. p init 0.0

let hybrid f () = (t, x, y) where
  rec der t = 1.0 init 0.0
  and x = harmonic(100.0)
  and y = harmonic(1000.0)

let hybrid main' () =
  let t, x, y = f () in
  present (period (0.001)) ->
    print_endline (String.concat ",\t" (List.map string_of_float [t;x;y]))
  else ()

let hybrid f' () = harmonic(100.0)
let hybrid g' () = (harmonic(100.0), harmonic(1e-3))

let f_d = Solve.solve_sundials(f')
let g_d = Solve.solve_sundials(g')
let m   = Solve.synchr f_d g_d

let node print (now, (xf, (xg, _))) =
  print_endline (String.concat ",\t" (List.map string_of_float [now;xf;xg]))

let input _ = ()
let node main () =
  let input = Some (Solve.make (100.0, input)) fby None in
  Solve.period'_t 0.01 print (run m input)