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|
module Point = Path.Point
module Make(Repr: Repr.PRINTER) = struct
type t = Point.t
type repr =
{ path: Repr.t
; close : Repr.t -> Repr.t
}
let create_path
: (Repr.t -> Repr.t) -> repr
= fun f ->
{ close = f
; path = Repr.create ()
}
(* Start a new path. *)
let start
: Path.Point.t -> repr -> repr
= fun t {close ; path } ->
let path = Repr.move_to (Point.get_coord t) path in
{ close
; path
}
let line_to
: Point.t -> Point.t -> repr -> repr
= fun p0 p1 t ->
let path =
Repr.move_to (Point.get_coord p1) t.path
|> Repr.line_to (Point.get_coord' p1)
|> Repr.line_to (Point.get_coord' p0)
|> Repr.line_to (Point.get_coord p0)
|> Repr.line_to (Point.get_coord p1)
|> Repr.close in
let path = t.close path in
{ t with path}
let quadratic_to
: Point.t -> Gg.v2 -> Gg.v2 -> Point.t -> repr -> repr
= fun p0 ctrl0 ctrl1 p1 t ->
let ctrl0' = Point.copy p1 ctrl0
and ctrl1' = Point.copy p1 ctrl1 in
let path =
Repr.move_to (Point.get_coord p1) t.path
|> Repr.line_to (Point.get_coord' p1)
|> Repr.quadratic_to
(Point.get_coord' ctrl1')
(Point.get_coord' ctrl0')
(Point.get_coord' p0)
|> Repr.line_to (Point.get_coord p0)
|> Repr.quadratic_to
(Point.get_coord ctrl0')
(Point.get_coord ctrl1')
(Point.get_coord p1)
|> Repr.close in
let path = t.close path in
{ t with path}
let stop
: repr -> repr
= fun t ->
t
let get
: repr -> Repr.t
= fun t ->
t.path
end
|
