2 files changed, 14 insertions, 1 deletions

diff --git a/js/helper-classes/3D/draw-utils.js b/js/helper-classes/3D/draw-utils.js
index 02d946ae..59da411f 100755
--- a/js/helper-classes/3D/draw-utils.js
+++ b/js/helper-classes/3D/draw-utils.js
@@ -112,6 +112,7 @@ var DrawUtils = exports.DrawUtils = Montage.create(Component, {
             this.eventManager.addEventListener("elementDeleted", this, false);
             this.eventManager.addEventListener("deleteSelection", this, false);
             this.eventManager.addEventListener("elementChange", this, false);
+            this.eventManager.addEventListener("closeDocument", this, false);
                 }
         },
 
@@ -135,6 +136,15 @@ var DrawUtils = exports.DrawUtils = Montage.create(Component, {
         }
     },
 
+    handleCloseDocument:{
+        value: function() {
+            if(this.application.ninja.documentController._documents.length === 0){
+                this._eltArray = null;
+                this._planesArray = null;
+            }
+        }
+    },
+
     handleElementAdded: {
         value: function(event) {
             this.addElement(event.detail);
diff --git a/js/helper-classes/3D/math-utils.js b/js/helper-classes/3D/math-utils.js
index 562a6e73..2f0283a9 100755
--- a/js/helper-classes/3D/math-utils.js
+++ b/js/helper-classes/3D/math-utils.js
@@ -729,7 +729,10 @@ var MathUtilsClass = exports.MathUtilsClass = Object.create(Object.prototype, {
             // the area of the polygon is the length of the normal
             var area = VecUtils.vecMag(3, normal );
             if (this.fpSign(area) != 0)
-                vec3.scale(normal, 1.0/area);
+                        {
+                //vec3.scale(normal, 1.0/area);
+                                normal = VecUtils.vecNormalize(3, normal, 1.0);
+                        }
 
             return normal;
         }