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type t =
  { p: Gg.v2
  ; size : float
  ; angle: float
  }

let create x y =
  { p = Gg.V2.v x y
  ; size = 0.1
  ; angle = Gg.Float.pi_div_4
  }

let (+) p1 p2 =
  { p1 with p = Gg.V2.(+) p1.p p2 }

let get_coord { p; _ } = p

let get_coord'
  : t -> Gg.v2
  = fun t ->
    let open Gg.V2 in
    let trans = of_polar @@ v t.size t.angle in
    t.p + trans