Interior curve evaluation

3 files changed, 27 insertions, 1 deletions

diff --git a/path/builder.ml b/path/builder.ml
index 166c073..4403599 100755
--- a/path/builder.ml
+++ b/path/builder.ml
@@ -203,4 +203,22 @@ module Make(Point:P) = struct
               path
           )
 
+  let map
+    : t -> (Point.t -> Point.t) -> t
+    = fun (points, beziers) f ->
+      let points = List.map
+          points
+          ~f
+      and beziers = List.map
+          beziers
+          ~f:(fun bezier ->
+
+              { p0 = f bezier.p0
+              ; p1 = f bezier.p1
+              ; ctrl0 = Point.(get_coord (f ( copy bezier.p0 bezier.ctrl0)))
+              ; ctrl1 = Point.(get_coord (f ( copy bezier.p1 bezier.ctrl1)))
+              }
+            ) in
+      points, beziers
+
 end
diff --git a/path/builder.mli b/path/builder.mli
index ff66bcb..2afbd4b 100755
--- a/path/builder.mli
+++ b/path/builder.mli
@@ -37,4 +37,7 @@ module Make(Point:P) : sig
   val repr
     : t -> (module Repr.M with type point = Point.t and type t = 's) -> 's -> 's
 
+  val map 
+    : t -> (Point.t -> Point.t) -> t
+
 end
diff --git a/path/fixed.ml b/path/fixed.ml
index d61bb0a..1362ad3 100755
--- a/path/fixed.ml
+++ b/path/fixed.ml
@@ -179,7 +179,12 @@ module Make(Point:P) = struct
             | Curve bezier ->
               let point = f step.point in
               { point
-              ; move = Curve {bezier with p1 = f bezier.p1} }
+              ; move = Curve
+                    { p1 = f bezier.p1
+                    ; ctrl0 = Point.get_coord (f (Point.copy step.point bezier.ctrl0))
+                    ; ctrl1 = Point.get_coord (f (Point.copy bezier.p1 bezier.ctrl1))
+                    }
+              }
           )
 
   let iter