1 files changed, 15 insertions, 6 deletions
diff --git a/public/assets/javascripts/rectangles/engine/shapes/polyline.js b/public/assets/javascripts/rectangles/engine/shapes/polyline.js
index fc6cad7..65e22ad 100644
--- a/public/assets/javascripts/rectangles/engine/shapes/polyline.js
+++ b/public/assets/javascripts/rectangles/engine/shapes/polyline.js
@@ -9,6 +9,12 @@ var Polyline = Fiber.extend(function(base){
     this.mx_points = []
     this.closed = false
 	}
+	exports.type = function(){
+	  return "polyline"
+	}
+	exports.instantiate = function(){
+	  return new Polyline
+	}
 	exports.add = function(p){
     this.points.push( p )
     this.mx_points.push( new MX.Point(p) )
@@ -25,19 +31,19 @@ var Polyline = Fiber.extend(function(base){
 	exports.getHeadAtIndex = function(index){
 	  if (index == 0) { return null }
 	  if (index == this.points.length-1) { return this.clone() }
-	  var head = new Polyline()
+	  var head = this.instantiate()
 	  head.points = this.points.slice(0, index+1)
 	  return head
 	}
 	exports.getTailAtIndex = function(index){
 	  if (index == this.points.length-1) { return null }
 	  if (index == 0) { return this.clone() }
-	  var tail = new Polyline()
+	  var tail = this.instantiate()
 	  tail.points = this.points.slice(index, this.points.length)
 	  return tail
 	}
 	exports.clone = function(){
-	  var clone = new Polyline()
+	  var clone = this.instantiate()
 	  clone.points = this.points.concat()
 	}
 	exports.hasPointNear = function(p){
@@ -148,10 +154,13 @@ var Polyline = Fiber.extend(function(base){
     return segments
   }
   exports.serialize = function(){
-    return this.points.map(function(point){ return [point.a, point.b] })
+    return {
+      type: this.type(),
+      points: this.points.map(function(point){ return [point.a, point.b] }),
+    }
   }
-  exports.deserialize = function(points){
-    this.points = points.map(function(point){ return new vec2(point[0], point[1]) })
+  exports.deserialize = function(data){
+    this.points = (data.points || data).map(function(point){ return new vec2(point[0], point[1]) })
   }
   exports.reset = function(){
     this.mx_points.forEach(function(mx){ scene.remove(mx) })