1 files changed, 10 insertions, 0 deletions
diff --git a/public/assets/javascripts/rectangles/models/vec2.js b/public/assets/javascripts/rectangles/models/vec2.js
index a5a832e..49613c3 100644
--- a/public/assets/javascripts/rectangles/models/vec2.js
+++ b/public/assets/javascripts/rectangles/models/vec2.js
@@ -63,6 +63,16 @@
 		this.b /= n
 		return this
 	}
+	vec2.prototype.addVec = function(v){
+	  this.a += v.a
+	  this.b += v.b
+	  return this
+	}
+  vec2.prototype.subVec = function(v){
+	  this.a -= v.a
+	  this.b -= v.b
+	  return this
+	}
 	vec2.prototype.zero = function(){
 		this.a = this.b = 0
 	}