From a8f37f041dce3f16917b6659d3ca97492f178f4d Mon Sep 17 00:00:00 2001
From: Sébastien Dailly <sebastien@chimrod.com>
Date: Sun, 3 Jan 2021 05:42:35 +0100
Subject: Communication with webworker

---
 layer/linePrinter.ml | 69 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 69 insertions(+)
 create mode 100755 layer/linePrinter.ml

(limited to 'layer/linePrinter.ml')

diff --git a/layer/linePrinter.ml b/layer/linePrinter.ml
new file mode 100755
index 0000000..3ed1c3c
--- /dev/null
+++ b/layer/linePrinter.ml
@@ -0,0 +1,69 @@
+module Make(Repr: Repr.PRINTER) = struct
+
+  type t = Path.Point.t
+
+  type repr =
+    { path: (Repr.t)
+    }
+
+  let create_path
+    : 'b -> repr
+    = fun _ ->
+      { path = Repr.create ()
+      }
+
+  (* Start a new path. *)
+  let start
+    : Path.Point.t -> repr -> repr
+    = fun t {path} ->
+      let path = Repr.move_to (Path.Point.get_coord t) path in
+      let path = Repr.line_to (Path.Point.get_coord' t) path in
+      { path
+      }
+
+  let line_to
+    : Path.Point.t -> Path.Point.t -> repr -> repr
+    = fun _ t {path} ->
+      let path = Repr.move_to (Path.Point.get_coord t) path in
+      let path = Repr.line_to (Path.Point.get_coord' t) path in
+      { path
+      }
+
+  let quadratic_to
+    : Path.Point.t -> Gg.v2 -> Gg.v2 -> Path.Point.t -> repr -> repr
+    = fun p0 ctrl0 ctrl1 p1 { path } ->
+
+      let path = ref path in
+
+      let bezier =
+        { Shapes.Bezier.p0 = Path.Point.get_coord p0
+        ; ctrl0
+        ; ctrl1
+        ; p1 = Path.Point.get_coord p1
+        } in
+
+      (* Mark each point on the bezier curve. The first point is the most
+         recent point  *)
+      let delay =
+        ((Path.Point.get_stamp p0) -. (Path.Point.get_stamp p1))
+        *. 100. /. 3.
+      in
+      for i = 0 to (Int.of_float delay) do
+        let bezier', _ = Shapes.Bezier.slice (0.1 *. (Float.of_int i)) bezier in
+        let point = Path.Point.copy p1 bezier'.Shapes.Bezier.p1 in
+        path := Repr.move_to (Path.Point.get_coord point) !path;
+        path := Repr.line_to (Path.Point.get_coord' point) !path;
+      done;
+
+      { path = !path }
+
+  let stop
+    : repr -> repr
+    = fun path -> path
+
+
+  let get
+    : repr -> Repr.t
+    = fun {path; _} ->
+      path
+end
-- 
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