scale map

1 files changed, 5 insertions, 0 deletions

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