From fae31bdb659b4b14322136e045ea565d38bbd04f Mon Sep 17 00:00:00 2001
From: Sébastien Dailly <sebastien@chimrod.com>
Date: Tue, 29 Dec 2020 21:41:47 +0100
Subject: Dynamic width

---
 path/builder.ml  | 17 +++++++++++++++--
 path/builder.mli |  3 +++
 path/point.ml    |  6 ++++++
 path/point.mli   |  4 ++++
 4 files changed, 28 insertions(+), 2 deletions(-)

(limited to 'path')

diff --git a/path/builder.ml b/path/builder.ml
index 3ccad9c..39ff75e 100755
--- a/path/builder.ml
+++ b/path/builder.ml
@@ -337,14 +337,15 @@ module Make(Point:P) = struct
       |> (fun b -> Gg.Box2.add_pt b bezier.ctrl0)
       |> (fun b -> Gg.Box2.add_pt b bezier.ctrl1)
 
+  (** Return the distance between a given point and the curve. May return
+      None if the point is out of the curve *)
   let distance
     : Gg.v2 -> fixedPath -> float option =
     fun point beziers ->
 
     Array.fold_left beziers.path
       ~init:None
-      ~f:(fun res path ->
-          match path with
+      ~f:(fun res -> function
           | Empty -> None
           | Line (p0, p1) ->
             let box = Gg.Box2.of_pts (Point.get_coord p0) (Point.get_coord p1) in
@@ -377,4 +378,16 @@ module Make(Point:P) = struct
   let id
     : fixedPath -> int
     = fun {id; _} -> id
+
+  let map_point
+    : fixedPath -> (Point.t -> Point.t) -> fixedPath
+    = fun {id; path} f ->
+      let path = Array.map path
+          ~f:(function
+              | Empty -> Empty
+              | Line (p1, p2) -> Line (f p1, f p2)
+              | Curve bezier -> Curve {bezier with p0 = f bezier.p0 ; p1 = f bezier.p1}
+            ) in
+      {id; path}
+
 end
diff --git a/path/builder.mli b/path/builder.mli
index 557cdfa..ca496f7 100755
--- a/path/builder.mli
+++ b/path/builder.mli
@@ -74,4 +74,7 @@ module Make(P:P) : sig
 
   val id 
     : fixedPath -> int
+
+  val map_point 
+    : fixedPath -> (P.t -> P.t) -> fixedPath
 end
diff --git a/path/point.ml b/path/point.ml
index abb9515..06eb635 100755
--- a/path/point.ml
+++ b/path/point.ml
@@ -19,6 +19,12 @@ let create ~angle ~width ~x ~y =
 let copy point p =
   { point with p }
 
+let set_angle p angle =
+  { p with angle = Gg.Float.rad_of_deg (180. -. angle) }
+
+let set_width p size =
+  { p with size }
+
 let (+) p1 p2 =
   { p1 with p = Gg.V2.(+) p1.p p2 }
 
diff --git a/path/point.mli b/path/point.mli
index 2c687ab..649a3be 100755
--- a/path/point.mli
+++ b/path/point.mli
@@ -10,5 +10,9 @@ val create: angle:float -> width:float -> x:float -> y:float -> t
 
 val copy : t -> Gg.v2 -> t
 
+val set_angle : t -> float -> t
+
+val set_width: t -> float -> t
+
 val get_coord'
   : t -> Gg.v2
-- 
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