blob: 9a3fe7ef6dabce4729c377932954e2504fdb9062 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
|
module Make(Layer: Repr.PRINTER) = struct
type point = Path.Point.t
type repr = Layer.t
type t =
{ path: Layer.t
; close : Layer.t -> Layer.t
}
let create_path
: (Layer.t -> Layer.t) -> t
= fun f ->
{ close = f
; path = Layer.create ()
}
(* Start a new path. *)
let start
: point -> point -> t -> t
= fun p1 _ {close ; path } ->
let path = Layer.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 =
Layer.move_to p1 t.path
|> Layer.line_to p1'
|> Layer.line_to p0'
|> Layer.line_to p0
|> Layer.line_to p1
|> Layer.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 =
Layer.move_to p1 t.path
|> Layer.line_to p1'
(* Backward *)
|> Layer.quadratic_to
ctrl1'
ctrl0'
p0'
|> Layer.line_to p0
(* Forward *)
|> Layer.quadratic_to
ctrl0
ctrl1
p1
|> Layer.close
|> t.close in
{ t with path }
let stop
: t -> t
= fun t ->
t
let get
: t -> Layer.t
= fun t ->
t.path
end
|
