121 lines
2.7 KiB
OCaml
121 lines
2.7 KiB
OCaml
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let open Printf in
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let debug = fprintf stderr in
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let checkpoint_ray = 600 in
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let module Vector = struct
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type t = {
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x : int;
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y : int
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}
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let create x y =
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{ x ; y }
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let diff dst src =
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{ x = (dst.x - src.x) ;
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y = (dst.y - src.y)
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}
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let mult src a =
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{ x = src.x * a ;
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y = src.y * a
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}
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let add dst src =
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{ x = (src.x + dst.x) ;
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y = (src.y + dst.y)
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}
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let distance (dst:t) (src:t) =
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(src.x - dst.x) * (src.x - dst.x) + (src.y - dst.y) * (src.y - dst.y)
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|> float_of_int
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|> sqrt
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|> int_of_float
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let is_near dst src =
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(distance dst src) < (checkpoint_ray * 2)
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let is_far dst src =
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((distance dst src) >= checkpoint_ray * 6)
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end
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in
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let module Pod = struct
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type t = {
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pos : Vector.t ;
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dir : Vector.t ;
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}
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end
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in
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let parse_line1 () =
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let line = input_line stdin in
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let build_results_fn = (
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fun x y checkpointx checkpointy checkpointdist checkpointangle ->
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(Vector.create x y),
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(Vector.create checkpointx checkpointy),
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checkpointdist,
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checkpointangle
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) in
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Scanf.sscanf line "%d %d %d %d %d %d" build_results_fn
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in
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let parse_line2 () =
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let line = input_line stdin in
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let build_results_fn = (
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fun opponentx opponenty ->
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(Vector.create opponentx opponenty)
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) in
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Scanf.sscanf line "%d %d" build_results_fn
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in
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let map_center = Vector.create (16000 / 2) (9000 / 2) in
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let first_turn = ref true in
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let old_pod = ref (Vector.create 0 0) in
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let tick = ref 0 in
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(* game loop *)
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while true do
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(* nextcheckpointdist: distance to the next checkpoint *)
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(* nextcheckpointangle: angle between your pod orientation and the direction of the next checkpoint *)
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let pod, checkpoint, checkpoint_dist, checkpoint_angle = parse_line1 () in
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let opponent = parse_line2 () in
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if !first_turn then begin
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old_pod := pod ;
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first_turn := false
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end ;
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(* output "x y thrust" : the target position + the power *)
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let is_aligned = checkpoint_angle > -5 && checkpoint_angle < 5 in
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let is_near_aligned = checkpoint_angle > -15 && checkpoint_angle < 15 in
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let is_wide_aligned = checkpoint_angle > -30 && checkpoint_angle < 30 in
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let is_aside = checkpoint_angle > -60 || checkpoint_angle < 60 in
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let is_behind = checkpoint_angle >= 85 || checkpoint_angle <= -85 in
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let use_boost = (!tick > 100) && is_aligned && (Vector.is_far pod checkpoint) in
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debug "angle = %d\n%!" checkpoint_angle ;
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let thrust =
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(* droit devant *)
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if is_behind then 6
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else 100
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in
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let power_str = match use_boost with
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| false -> string_of_int thrust
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| true -> "BOOST"
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in
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printf "%d %d %s\n%!" checkpoint.x checkpoint.y power_str ;
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tick := !tick + 1 ;
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old_pod := pod ;
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done;
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