2 files changed, 15 insertions, 0 deletions
diff --git a/assets/javascripts/rectangles/models/rect.js b/assets/javascripts/rectangles/models/rect.js
index 548e16a..5623dc8 100644
--- a/assets/javascripts/rectangles/models/rect.js
+++ b/assets/javascripts/rectangles/models/rect.js
@@ -26,6 +26,16 @@ window.rect = (function(){
 	rect.prototype.area = function(){
 		return this.x.length() * this.y.length()
 	}
+
+	rect.prototype.mul = function(n){
+		this.x.mul(n)
+		this.y.mul(n)
+	}
+	rect.prototype.div = function(n){
+		this.x.div(n)
+		this.y.div(n)
+	}
+
 	rect.prototype.translate = function(translation){
 		var translation = translation || this.translation
 		this.x.abs().add(translation.a)
diff --git a/assets/javascripts/rectangles/models/vec2.js b/assets/javascripts/rectangles/models/vec2.js
index 4e2ad36..3105fec 100644
--- a/assets/javascripts/rectangles/models/vec2.js
+++ b/assets/javascripts/rectangles/models/vec2.js
@@ -28,23 +28,28 @@ vec2.prototype.eq = function(v){
 vec2.prototype.add = function(n){
 	this.a += n
 	this.b += n
+	return this
 }
 vec2.prototype.sub = function(n){
 	this.a -= n
 	this.b -= n
+	return this
 }
 vec2.prototype.mul = function(n){
 	this.a *= n
 	this.b *= n
+	return this
 }
 vec2.prototype.div = function(n){
 	this.a /= n
 	this.b /= n
+	return this
 }
 vec2.normalize = function(){
 	var dim = max(this.a, this.b)
 	this.a = this.a/dim
 	this.b = this.b/dim
+	return this
 }
 vec2.prototype.contains = function(n){
 	return this.a <= n && n <= this.b