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