From abe379840dc6887f5479c834aefa900e67d967e7 Mon Sep 17 00:00:00 2001
From: liabru <liambrum@gmail.com>
Date: Thu, 20 Mar 2014 00:42:52 +0000
Subject: [PATCH] added ids to constraints

---
 src/constraint/Constraint.js | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/src/constraint/Constraint.js b/src/constraint/Constraint.js
index d3854ff..194d946 100644
--- a/src/constraint/Constraint.js
+++ b/src/constraint/Constraint.js
@@ -17,7 +17,8 @@ var Constraint = {};
 
 (function() {
 
-    var _minLength = 0.000001;
+    var _minLength = 0.000001,
+        _nextId = 0;
 
     /**
      * Description
@@ -51,6 +52,7 @@ var Constraint = {};
         constraint.render = Common.extend(render, constraint.render);
 
         // option defaults
+        constraint.id = constraint.id || Constraint.nextId();
         constraint.stiffness = constraint.stiffness || 1;
         constraint.angularStiffness = constraint.angularStiffness || 0;
         constraint.angleA = constraint.bodyA ? constraint.bodyA.angle : constraint.angleA;
@@ -221,4 +223,13 @@ var Constraint = {};
 
     };
 
+    /**
+     * Returns the next unique constraintId
+     * @method nextId
+     * @return {Number} Unique constraintId
+     */
+    Constraint.nextId = function() {
+        return _nextId++;
+    };
+
 })();
\ No newline at end of file