3 files changed, 5 insertions, 2 deletions
diff --git a/public/assets/javascripts/rectangles/models/rect.js b/public/assets/javascripts/rectangles/models/rect.js
index f23ab9e..67852b4 100644
--- a/public/assets/javascripts/rectangles/models/rect.js
+++ b/public/assets/javascripts/rectangles/models/rect.js
@@ -139,6 +139,7 @@
 	}
 	Rect.prototype.width = function(){ return this.x.length() }
 	Rect.prototype.height = function(){ return this.y.length() }
+	Rect.prototype.delta = function(){ return new vec2( this.x.magnitude(), this.y.magnitude() ) }
 	Rect.prototype.toString = function(){
 		var sides = sidesToString(this.sides)
 		var s = "[" + this.x.toString() + " " + this.y.toString() + "] " + sides
diff --git a/public/assets/javascripts/rectangles/models/surface.js b/public/assets/javascripts/rectangles/models/surface.js
index 3f43ec2..f7fe890 100644
--- a/public/assets/javascripts/rectangles/models/surface.js
+++ b/public/assets/javascripts/rectangles/models/surface.js
@@ -113,7 +113,9 @@
 			return old_bounds
 		}
 
-    var center_index = this.index_for_x( position.a + dimension.a/2 + delta.a, 0 )
+    var left_index   = this.index_for_x( position.a + dimension.a/2 + delta.a, 0 )
+    var center_index = this.index_for_x( position.a + dimension.a/2 + delta.a, left_index )
+    var right_index  = this.index_for_x( position.a + dimension.a/2 + delta.a, center_index )
 		var new_bounds = this.bounds_at_index_with_dimensions(center_index, dimension)
 		
 		this.clamp_delta(new_bounds, dimension, position, delta)
diff --git a/public/assets/javascripts/rectangles/util/mouse.js b/public/assets/javascripts/rectangles/util/mouse.js
index 06958af..fea3376 100644
--- a/public/assets/javascripts/rectangles/util/mouse.js
+++ b/public/assets/javascripts/rectangles/util/mouse.js
@@ -8,7 +8,7 @@
 				// cursor.x.a
 				// cursor.y.a
 			},
-			move: function(e, cursor, delta){
+			move: function(e, cursor){
 				// delta.a (x)
 				// delta.b (y)
 			},