(** Signature for points *)
module type P = sig
  type t

  val empty : t

  val get_coord : t -> Gg.v2

  (** Copy a point and all thoses properties to the given location *)
  val copy : t -> Gg.v2 -> t

end

module Make(Point:P) : sig

  module type BUILDER = sig
    type t

    val repr
      : t -> (module Repr.M with type t = Point.t and type repr = 's) -> 's -> 's

  end

  type t 

  (** Return the identifier for this path *)
  val id
    : t -> int

  (** Create a path from a builder *)
  val to_fixed
    : (module BUILDER with type t = 'a) -> 'a -> t

  (** Represent the path *)
  val repr
    : t -> (module Repr.M with type t = Point.t and type repr = 's) -> 's -> 's

  (** Return the distance between a given point and the curve. May return
      None if the point is out of the curve *)
  val distance
    : Gg.v2 -> t -> (Gg.v2 * float) option 

  val map_point
    : t -> (Point.t -> Point.t) -> t

end