diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8e4ef08..7eeb0a4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,50 @@
+<a name="0.13.0"></a>
+# 0.13.0 (2017-07-06)
+
+* added Composite.bounds ([79ffcf8](https://github.com/liabru/matter-js/commit/79ffcf8))
+* added constraint damping ([44c4d1f](https://github.com/liabru/matter-js/commit/44c4d1f))
+* added constraint.render.type and constraint.render.anchor ([0952516](https://github.com/liabru/matter-js/commit/0952516))
+* added Example.constraints ([b93c08f](https://github.com/liabru/matter-js/commit/b93c08f))
+* added Example.doublePendulum ([a7aa47d](https://github.com/liabru/matter-js/commit/a7aa47d))
+* added Examples.ragdoll ([48611c5](https://github.com/liabru/matter-js/commit/48611c5))
+* added optional output argument to Vector.rotate ([59d62be](https://github.com/liabru/matter-js/commit/59d62be))
+* added rotation point parameter to Body.rotate, closes #410 ([749ed50](https://github.com/liabru/matter-js/commit/749ed50)), closes [#410](https://github.com/liabru/matter-js/issues/410)
+* added second pass for constraint solving ([f49d053](https://github.com/liabru/matter-js/commit/f49d053))
+* change constraint solve order ([a5bd6b2](https://github.com/liabru/matter-js/commit/a5bd6b2))
+* changed lint rules ([d1fbe95](https://github.com/liabru/matter-js/commit/d1fbe95))
+* fix constraint.angularStiffness ([ab0283b](https://github.com/liabru/matter-js/commit/ab0283b))
+* fix Example.collisionFiltering rendering ([74a7cfc](https://github.com/liabru/matter-js/commit/74a7cfc))
+* fix lint errors ([774d8bc](https://github.com/liabru/matter-js/commit/774d8bc))
+* fix soft body stiffness ([1bae2de](https://github.com/liabru/matter-js/commit/1bae2de))
+* fixed Common.now ([2b76c4c](https://github.com/liabru/matter-js/commit/2b76c4c))
+* fixed constraint torque calculation ([a8d1950](https://github.com/liabru/matter-js/commit/a8d1950))
+* fixed constraint torque calculation ([068fdc0](https://github.com/liabru/matter-js/commit/068fdc0))
+* fixed Examples.compound constraint offset ([e6babf0](https://github.com/liabru/matter-js/commit/e6babf0))
+* fixed various constraints in examples ([ac67ef8](https://github.com/liabru/matter-js/commit/ac67ef8))
+* fixed various problems with constraints ([26a60e4](https://github.com/liabru/matter-js/commit/26a60e4))
+* implemented constraint warming ([daf26af](https://github.com/liabru/matter-js/commit/daf26af))
+* improved Example.car using pin constraint ([130e6b3](https://github.com/liabru/matter-js/commit/130e6b3))
+* improved Example.catapult using pin constraint ([0e15099](https://github.com/liabru/matter-js/commit/0e15099))
+* improved Example.chains using pin constraint ([9d2f0ff](https://github.com/liabru/matter-js/commit/9d2f0ff))
+* improved Examples.bridge ([b277b39](https://github.com/liabru/matter-js/commit/b277b39))
+* improved Examples.bridge ([b6e5973](https://github.com/liabru/matter-js/commit/b6e5973))
+* improved position resolver ([71998a0](https://github.com/liabru/matter-js/commit/71998a0))
+* improved spring and pin rendering ([837c43b](https://github.com/liabru/matter-js/commit/837c43b))
+* refactored Common.isElement ([295cffe](https://github.com/liabru/matter-js/commit/295cffe))
+* removed Common.shadeColor ([d63b0c2](https://github.com/liabru/matter-js/commit/d63b0c2))
+* tweaked Example.doublePendulum ([4894008](https://github.com/liabru/matter-js/commit/4894008))
+* update alpha build ([fe9b05d](https://github.com/liabru/matter-js/commit/fe9b05d))
+* update alpha build ([b874f4d](https://github.com/liabru/matter-js/commit/b874f4d))
+* update alpha build ([08aa3f2](https://github.com/liabru/matter-js/commit/08aa3f2))
+* update readme and remove redundant plugins ([2560a68](https://github.com/liabru/matter-js/commit/2560a68))
+* Update README.md ([4168d3c](https://github.com/liabru/matter-js/commit/4168d3c))
+* updated license and contributing ([d2af721](https://github.com/liabru/matter-js/commit/d2af721))
+* updated readme ([26c1200](https://github.com/liabru/matter-js/commit/26c1200))
+* upgraded matter-tools ([477f2d7](https://github.com/liabru/matter-js/commit/477f2d7))
+* upgraded matter-wrap ([c9294eb](https://github.com/liabru/matter-js/commit/c9294eb))
+
+
+
 <a name="0.12.0"></a>
 # 0.12.0 (2017-02-02)
 
diff --git a/bower.json b/bower.json
index 5695e69..f8f28c8 100644
--- a/bower.json
+++ b/bower.json
@@ -1,6 +1,6 @@
 {
   "name": "Matter",
-  "version": "0.12.0",
+  "version": "0.13.0",
   "homepage": "https://github.com/liabru/matter-js",
   "authors": [
     "Liam Brummitt <liam@brm.io> (http://brm.io/)"
diff --git a/build/matter.js b/build/matter.js
index df0c000..31f13cf 100644
--- a/build/matter.js
+++ b/build/matter.js
@@ -1,5 +1,5 @@
 /**
-* matter-js 0.12.0-alpha by @liabru 2017-06-26
+* matter-js 0.13.0 by @liabru 2017-07-06
 * http://brm.io/matter-js/
 * License MIT
 */
@@ -7,7 +7,7 @@
 /**
  * The MIT License (MIT)
  * 
- * Copyright (c) 2014 Liam Brummitt
+ * Copyright (c) Liam Brummitt and contributors.
  * 
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
@@ -185,7 +185,7 @@ var Axes = _dereq_('../geometry/Axes');
 
         // render properties
         var defaultFillStyle = (body.isStatic ? '#2e2b44' : Common.choose(['#006BA6', '#0496FF', '#FFBC42', '#D81159', '#8F2D56'])),
-            defaultStrokeStyle = Common.shadeColor(defaultFillStyle, -20);
+            defaultStrokeStyle = '#000';
         body.render.fillStyle = body.render.fillStyle || defaultFillStyle;
         body.render.strokeStyle = body.render.strokeStyle || defaultStrokeStyle;
         body.render.sprite.xOffset += -(body.bounds.min.x - body.position.x) / (body.bounds.max.x - body.bounds.min.x);
@@ -672,6 +672,7 @@ var Axes = _dereq_('../geometry/Axes');
      * @return {}
      */
     var _totalProperties = function(body) {
+        // from equations at:
         // https://ecourses.ou.edu/cgi-bin/ebook.cgi?doc=&topic=st&chap_sec=07.2&page=theory
         // http://output.to/sideway/default.asp?qno=121100087
 
@@ -1155,7 +1156,7 @@ var Axes = _dereq_('../geometry/Axes');
      *
      * @property render.lineWidth
      * @type number
-     * @default 1.5
+     * @default 0
      */
 
     /**
@@ -1738,6 +1739,24 @@ var Body = _dereq_('./Body');
         return composite;
     };
 
+    /**
+     * Returns the union of the bounds of all of the composite's bodies.
+     * @method bounds
+     * @param {composite} composite The composite.
+     * @returns {bounds} The composite bounds.
+     */
+    Composite.bounds = function(composite) {
+        var bodies = Matter.Composite.allBodies(composite),
+            vertices = [];
+
+        for (var i = 0; i < bodies.length; i += 1) {
+            var body = bodies[i];
+            vertices.push(body.bounds.min, body.bounds.max);
+        }
+
+        return Matter.Bounds.create(vertices);
+    };
+
     /*
     *
     *  Events Documentation
@@ -2946,7 +2965,7 @@ var Bounds = _dereq_('../geometry/Bounds');
         for (i = 0; i < pairs.length; i++) {
             pair = pairs[i];
 
-            if (!pair.isActive || pair.isSensor || pair.separation < 0)
+            if (!pair.isActive || pair.isSensor)
                 continue;
             
             collision = pair.collision;
@@ -3546,7 +3565,7 @@ var Common = _dereq_('../core/Common');
             anchors: true
         };
 
-        if (constraint.length === 0) {
+        if (constraint.length === 0 && constraint.stiffness > 0.1) {
             render.type = 'pin';
             render.anchors = false;
         } else if (constraint.stiffness < 0.9) {
@@ -4204,6 +4223,7 @@ module.exports = Common;
 
     Common._nextId = 0;
     Common._seed = 0;
+    Common._nowStartTime = +(new Date());
 
     /**
      * Extends the object in the first argument using the object in the second argument.
@@ -4333,25 +4353,6 @@ module.exports = Common;
         return val;
     };
 
-    /**
-     * Returns a hex colour string made by lightening or darkening color by percent.
-     * @method shadeColor
-     * @param {string} color
-     * @param {number} percent
-     * @return {string} A hex colour
-     */
-    Common.shadeColor = function(color, percent) {   
-        // http://stackoverflow.com/questions/5560248/programmatically-lighten-or-darken-a-hex-color
-        var colorInteger = parseInt(color.slice(1),16), 
-            amount = Math.round(2.55 * percent), 
-            R = (colorInteger >> 16) + amount, 
-            B = (colorInteger >> 8 & 0x00FF) + amount, 
-            G = (colorInteger & 0x0000FF) + amount;
-        return "#" + (0x1000000 + (R < 255 ? R < 1 ? 0 : R :255) * 0x10000 
-                + (B < 255 ? B < 1 ? 0 : B : 255) * 0x100 
-                + (G < 255 ? G < 1 ? 0 : G : 255)).toString(16).slice(1);
-    };
-
     /**
      * Shuffles the given array in-place.
      * The function uses a seeded random generator.
@@ -4387,15 +4388,7 @@ module.exports = Common;
      * @return {boolean} True if the object is a HTMLElement, otherwise false
      */
     Common.isElement = function(obj) {
-        // http://stackoverflow.com/questions/384286/javascript-isdom-how-do-you-check-if-a-javascript-object-is-a-dom-object
-        try {
-            return obj instanceof HTMLElement;
-        }
-        catch(e){
-            return (typeof obj==="object") &&
-              (obj.nodeType===1) && (typeof obj.style === "object") &&
-              (typeof obj.ownerDocument ==="object");
-        }
+        return obj instanceof HTMLElement;
     };
 
     /**
@@ -4465,26 +4458,21 @@ module.exports = Common;
     };
     
     /**
-     * Returns the current timestamp (high-res if available).
+     * Returns the current timestamp since the time origin (e.g. from page load).
+     * The result will be high-resolution including decimal places if available.
      * @method now
-     * @return {number} the current timestamp (high-res if available)
+     * @return {number} the current timestamp
      */
     Common.now = function() {
-        // http://stackoverflow.com/questions/221294/how-do-you-get-a-timestamp-in-javascript
-        // https://gist.github.com/davidwaterston/2982531
+        if (window.performance) {
+            if (window.performance.now) {
+                return window.performance.now();
+            } else if (window.performance.webkitNow) {
+                return window.performance.webkitNow();
+            }
+        }
 
-        var performance = window.performance || {};
-
-        performance.now = (function() {
-            return performance.now    ||
-            performance.webkitNow     ||
-            performance.msNow         ||
-            performance.oNow          ||
-            performance.mozNow        ||
-            function() { return +(new Date()); };
-        })();
-              
-        return performance.now();
+        return (new Date()) - Common._nowStartTime;
     };
     
     /**
@@ -4502,7 +4490,7 @@ module.exports = Common;
     };
 
     var _seededRandom = function() {
-        // https://gist.github.com/ngryman/3830489
+        // https://en.wikipedia.org/wiki/Linear_congruential_generator
         Common._seed = (Common._seed * 9301 + 49297) % 233280;
         return Common._seed / 233280;
     };
@@ -4634,7 +4622,9 @@ module.exports = Common;
      * @return {array} Partially ordered set of vertices in topological order.
      */
     Common.topologicalSort = function(graph) {
-        // https://mgechev.github.io/javascript-algorithms/graphs_others_topological-sort.js.html
+        // https://github.com/mgechev/javascript-algorithms
+        // Copyright (c) Minko Gechev (MIT license)
+        // Modifications: tidy formatting and naming
         var result = [],
             visited = [],
             temp = [];
@@ -5396,7 +5386,7 @@ var Common = _dereq_('./Common');
      * @readOnly
      * @type {String}
      */
-    Matter.version = '0.12.0-alpha';
+    Matter.version = '0.13.0';
 
     /**
      * A list of plugin dependencies to be installed. These are normally set and installed through `Matter.use`.
@@ -7080,10 +7070,7 @@ var Bodies = _dereq_('./Bodies');
             pointB: { x: wheelAOffset, y: wheelYOffset },
             bodyA: wheelA,
             stiffness: 1,
-            length: 0,
-            render: {
-                lineWidth: 0
-            }
+            length: 0
         });
                         
         var axelB = Constraint.create({
@@ -7091,10 +7078,7 @@ var Bodies = _dereq_('./Bodies');
             pointB: { x: wheelBOffset, y: wheelYOffset },
             bodyA: wheelB,
             stiffness: 1,
-            length: 0,
-            render: {
-                lineWidth: 0
-            }
+            length: 0
         });
         
         Composite.addBody(car, body);
@@ -7123,7 +7107,7 @@ var Bodies = _dereq_('./Bodies');
      */
     Composites.softBody = function(xx, yy, columns, rows, columnGap, rowGap, crossBrace, particleRadius, particleOptions, constraintOptions) {
         particleOptions = Common.extend({ inertia: Infinity }, particleOptions);
-        constraintOptions = Common.extend({ stiffness: 0.2 }, constraintOptions);
+        constraintOptions = Common.extend({ stiffness: 0.2, render: { type: 'line', anchors: false } }, constraintOptions);
 
         var softBody = Composites.stack(xx, yy, columns, rows, columnGap, rowGap, function(x, y) {
             return Bodies.circle(x, y, particleRadius, particleOptions);
@@ -7480,6 +7464,9 @@ var Bounds = _dereq_('../geometry/Bounds');
 
     var _svgPathToAbsolute = function(path) {
         // http://phrogz.net/convert-svg-path-to-all-absolute-commands
+        // Copyright (c) Gavin Kistner
+        // http://phrogz.net/js/_ReuseLicense.txt
+        // Modifications: tidy formatting and naming
         var x0, y0, x1, y1, x2, y2, segs = path.pathSegList,
             x = 0, y = 0, len = segs.numberOfItems;
 
@@ -7937,7 +7924,7 @@ var Common = _dereq_('../core/Common');
             j;
 
         // find the polygon's moment of inertia, using second moment of area
-        // http://www.physicsforums.com/showthread.php?t=25293
+        // from equations at http://www.physicsforums.com/showthread.php?t=25293
         for (var n = 0; n < v.length; n++) {
             j = (n + 1) % v.length;
             cross = Math.abs(Vector.cross(v[j], v[n]));
@@ -8141,6 +8128,7 @@ var Common = _dereq_('../core/Common');
      */
     Vertices.isConvex = function(vertices) {
         // http://paulbourke.net/geometry/polygonmesh/
+        // Copyright (c) Paul Bourke (use permitted)
 
         var flag = 0,
             n = vertices.length,
@@ -8183,7 +8171,7 @@ var Common = _dereq_('../core/Common');
      * @return [vertex] vertices
      */
     Vertices.hull = function(vertices) {
-        // http://en.wikibooks.org/wiki/Algorithm_Implementation/Geometry/Convex_hull/Monotone_chain
+        // http://geomalgorithms.com/a10-_hull-1.html
 
         var upper = [],
             lower = [], 
@@ -8198,7 +8186,7 @@ var Common = _dereq_('../core/Common');
         });
 
         // build lower hull
-        for (i = 0; i < vertices.length; i++) {
+        for (i = 0; i < vertices.length; i += 1) {
             vertex = vertices[i];
 
             while (lower.length >= 2 
@@ -8210,7 +8198,7 @@ var Common = _dereq_('../core/Common');
         }
 
         // build upper hull
-        for (i = vertices.length - 1; i >= 0; i--) {
+        for (i = vertices.length - 1; i >= 0; i -= 1) {
             vertex = vertices[i];
 
             while (upper.length >= 2 
@@ -8771,7 +8759,7 @@ var Mouse = _dereq_('../core/Mouse');
 
             if (constraint.render.type === 'pin') {
                 c.beginPath();
-                c.arc(start.x, start.y, 4, 0, 2 * Math.PI);
+                c.arc(start.x, start.y, 3, 0, 2 * Math.PI);
                 c.closePath();
             } else {
                 if (bodyB) {
@@ -8789,7 +8777,7 @@ var Mouse = _dereq_('../core/Mouse');
                         coils = Math.ceil(Common.clamp(constraint.length / 5, 12, 20)),
                         offset;
 
-                    for (var j = 0; j < coils; j += 1) {
+                    for (var j = 1; j < coils; j += 1) {
                         offset = j % 2 === 0 ? 1 : -1;
 
                         c.lineTo(
diff --git a/build/matter.min.js b/build/matter.min.js
index d492197..a90a2dd 100644
--- a/build/matter.min.js
+++ b/build/matter.min.js
@@ -1,47 +1,47 @@
 /**
-* matter-js 0.12.0-alpha by @liabru 2017-06-26
+* matter-js 0.13.0 by @liabru 2017-07-06
 * http://brm.io/matter-js/
 * License MIT
 */
 !function(e){if("object"==typeof exports&&"undefined"!=typeof module)module.exports=e();else if("function"==typeof define&&define.amd)define([],e);else{var t;t="undefined"!=typeof window?window:"undefined"!=typeof global?global:"undefined"!=typeof self?self:this,t.Matter=e()}}(function(){return function e(t,n,o){function i(s,a){if(!n[s]){if(!t[s]){var l="function"==typeof require&&require;if(!a&&l)return l(s,!0);if(r)return r(s,!0);var c=new Error("Cannot find module '"+s+"'");throw c.code="MODULE_NOT_FOUND",c}var d=n[s]={exports:{}};t[s][0].call(d.exports,function(e){var n=t[s][1][e];return i(n?n:e)},d,d.exports,e,t,n,o)}return n[s].exports}for(var r="function"==typeof require&&require,s=0;s<o.length;s++)i(o[s]);return i}({1:[function(e,t,n){var o={};t.exports=o;var i=e("../geometry/Vertices"),r=e("../geometry/Vector"),s=e("../core/Sleeping"),a=(e("../render/Render"),e("../core/Common")),l=e("../geometry/Bounds"),c=e("../geometry/Axes");!function(){o._inertiaScale=4,o._nextCollidingGroupId=1,
 o._nextNonCollidingGroupId=-1,o._nextCategory=1,o.create=function(t){var n={id:a.nextId(),type:"body",label:"Body",parts:[],plugin:{},angle:0,vertices:i.fromPath("L 0 0 L 40 0 L 40 40 L 0 40"),position:{x:0,y:0},force:{x:0,y:0},torque:0,positionImpulse:{x:0,y:0},constraintImpulse:{x:0,y:0,angle:0},totalContacts:0,speed:0,angularSpeed:0,velocity:{x:0,y:0},angularVelocity:0,isSensor:!1,isStatic:!1,isSleeping:!1,motion:0,sleepThreshold:60,density:.001,restitution:0,friction:.1,frictionStatic:.5,frictionAir:.01,collisionFilter:{category:1,mask:4294967295,group:0},slop:.05,timeScale:1,render:{visible:!0,opacity:1,sprite:{xScale:1,yScale:1,xOffset:0,yOffset:0},lineWidth:0}},o=a.extend(n,t);return e(o,t),o},o.nextGroup=function(e){return e?o._nextNonCollidingGroupId--:o._nextCollidingGroupId++},o.nextCategory=function(){return o._nextCategory=o._nextCategory<<1,o._nextCategory};var e=function(e,t){t=t||{},o.set(e,{bounds:e.bounds||l.create(e.vertices),positionPrev:e.positionPrev||r.clone(e.position),
-anglePrev:e.anglePrev||e.angle,vertices:e.vertices,parts:e.parts||[e],isStatic:e.isStatic,isSleeping:e.isSleeping,parent:e.parent||e}),i.rotate(e.vertices,e.angle,e.position),c.rotate(e.axes,e.angle),l.update(e.bounds,e.vertices,e.velocity),o.set(e,{axes:t.axes||e.axes,area:t.area||e.area,mass:t.mass||e.mass,inertia:t.inertia||e.inertia});var n=e.isStatic?"#2e2b44":a.choose(["#006BA6","#0496FF","#FFBC42","#D81159","#8F2D56"]),s=a.shadeColor(n,-20);e.render.fillStyle=e.render.fillStyle||n,e.render.strokeStyle=e.render.strokeStyle||s,e.render.sprite.xOffset+=-(e.bounds.min.x-e.position.x)/(e.bounds.max.x-e.bounds.min.x),e.render.sprite.yOffset+=-(e.bounds.min.y-e.position.y)/(e.bounds.max.y-e.bounds.min.y)};o.set=function(e,t,n){var i;"string"==typeof t&&(i=t,t={},t[i]=n);for(i in t)if(n=t[i],t.hasOwnProperty(i))switch(i){case"isStatic":o.setStatic(e,n);break;case"isSleeping":s.set(e,n);break;case"mass":o.setMass(e,n);break;case"density":o.setDensity(e,n);break;case"inertia":o.setInertia(e,n);
-break;case"vertices":o.setVertices(e,n);break;case"position":o.setPosition(e,n);break;case"angle":o.setAngle(e,n);break;case"velocity":o.setVelocity(e,n);break;case"angularVelocity":o.setAngularVelocity(e,n);break;case"parts":o.setParts(e,n);break;default:e[i]=n}},o.setStatic=function(e,t){for(var n=0;n<e.parts.length;n++){var o=e.parts[n];o.isStatic=t,t?(o._original={restitution:o.restitution,friction:o.friction,mass:o.mass,inertia:o.inertia,density:o.density,inverseMass:o.inverseMass,inverseInertia:o.inverseInertia},o.restitution=0,o.friction=1,o.mass=o.inertia=o.density=1/0,o.inverseMass=o.inverseInertia=0,o.positionPrev.x=o.position.x,o.positionPrev.y=o.position.y,o.anglePrev=o.angle,o.angularVelocity=0,o.speed=0,o.angularSpeed=0,o.motion=0):o._original&&(o.restitution=o._original.restitution,o.friction=o._original.friction,o.mass=o._original.mass,o.inertia=o._original.inertia,o.density=o._original.density,o.inverseMass=o._original.inverseMass,o.inverseInertia=o._original.inverseInertia,
-delete o._original)}},o.setMass=function(e,t){e.mass=t,e.inverseMass=1/e.mass,e.density=e.mass/e.area},o.setDensity=function(e,t){o.setMass(e,t*e.area),e.density=t},o.setInertia=function(e,t){e.inertia=t,e.inverseInertia=1/e.inertia},o.setVertices=function(e,t){t[0].body===e?e.vertices=t:e.vertices=i.create(t,e),e.axes=c.fromVertices(e.vertices),e.area=i.area(e.vertices),o.setMass(e,e.density*e.area);var n=i.centre(e.vertices);i.translate(e.vertices,n,-1),o.setInertia(e,o._inertiaScale*i.inertia(e.vertices,e.mass)),i.translate(e.vertices,e.position),l.update(e.bounds,e.vertices,e.velocity)},o.setParts=function(e,n,r){var s;for(n=n.slice(0),e.parts.length=0,e.parts.push(e),e.parent=e,s=0;s<n.length;s++){var a=n[s];a!==e&&(a.parent=e,e.parts.push(a))}if(1!==e.parts.length){if(r="undefined"==typeof r||r){var l=[];for(s=0;s<n.length;s++)l=l.concat(n[s].vertices);i.clockwiseSort(l);var c=i.hull(l),d=i.centre(c);o.setVertices(e,c),i.translate(e.vertices,d)}var u=t(e);e.area=u.area,e.parent=e,
-e.position.x=u.centre.x,e.position.y=u.centre.y,e.positionPrev.x=u.centre.x,e.positionPrev.y=u.centre.y,o.setMass(e,u.mass),o.setInertia(e,u.inertia),o.setPosition(e,u.centre)}},o.setPosition=function(e,t){var n=r.sub(t,e.position);e.positionPrev.x+=n.x,e.positionPrev.y+=n.y;for(var o=0;o<e.parts.length;o++){var s=e.parts[o];s.position.x+=n.x,s.position.y+=n.y,i.translate(s.vertices,n),l.update(s.bounds,s.vertices,e.velocity)}},o.setAngle=function(e,t){var n=t-e.angle;e.anglePrev+=n;for(var o=0;o<e.parts.length;o++){var s=e.parts[o];s.angle+=n,i.rotate(s.vertices,n,e.position),c.rotate(s.axes,n),l.update(s.bounds,s.vertices,e.velocity),o>0&&r.rotateAbout(s.position,n,e.position,s.position)}},o.setVelocity=function(e,t){e.positionPrev.x=e.position.x-t.x,e.positionPrev.y=e.position.y-t.y,e.velocity.x=t.x,e.velocity.y=t.y,e.speed=r.magnitude(e.velocity)},o.setAngularVelocity=function(e,t){e.anglePrev=e.angle-t,e.angularVelocity=t,e.angularSpeed=Math.abs(e.angularVelocity)},o.translate=function(e,t){
-o.setPosition(e,r.add(e.position,t))},o.rotate=function(e,t,n){if(n){var i=Math.cos(t),r=Math.sin(t),s=e.position.x-n.x,a=e.position.y-n.y;o.setPosition(e,{x:n.x+(s*i-a*r),y:n.y+(s*r+a*i)}),o.setAngle(e,e.angle+t)}else o.setAngle(e,e.angle+t)},o.scale=function(e,n,r,s){for(var a=0;a<e.parts.length;a++){var d=e.parts[a];i.scale(d.vertices,n,r,e.position),d.axes=c.fromVertices(d.vertices),e.isStatic||(d.area=i.area(d.vertices),o.setMass(d,e.density*d.area),i.translate(d.vertices,{x:-d.position.x,y:-d.position.y}),o.setInertia(d,i.inertia(d.vertices,d.mass)),i.translate(d.vertices,{x:d.position.x,y:d.position.y})),l.update(d.bounds,d.vertices,e.velocity)}if(e.circleRadius&&(n===r?e.circleRadius*=n:e.circleRadius=null),!e.isStatic){var u=t(e);e.area=u.area,o.setMass(e,u.mass),o.setInertia(e,u.inertia)}},o.update=function(e,t,n,o){var s=Math.pow(t*n*e.timeScale,2),a=1-e.frictionAir*n*e.timeScale,d=e.position.x-e.positionPrev.x,u=e.position.y-e.positionPrev.y;e.velocity.x=d*a*o+e.force.x/e.mass*s,
-e.velocity.y=u*a*o+e.force.y/e.mass*s,e.positionPrev.x=e.position.x,e.positionPrev.y=e.position.y,e.position.x+=e.velocity.x,e.position.y+=e.velocity.y,e.angularVelocity=(e.angle-e.anglePrev)*a*o+e.torque/e.inertia*s,e.anglePrev=e.angle,e.angle+=e.angularVelocity,e.speed=r.magnitude(e.velocity),e.angularSpeed=Math.abs(e.angularVelocity);for(var p=0;p<e.parts.length;p++){var f=e.parts[p];i.translate(f.vertices,e.velocity),p>0&&(f.position.x+=e.velocity.x,f.position.y+=e.velocity.y),0!==e.angularVelocity&&(i.rotate(f.vertices,e.angularVelocity,e.position),c.rotate(f.axes,e.angularVelocity),p>0&&r.rotateAbout(f.position,e.angularVelocity,e.position,f.position)),l.update(f.bounds,f.vertices,e.velocity)}},o.applyForce=function(e,t,n){e.force.x+=n.x,e.force.y+=n.y;var o={x:t.x-e.position.x,y:t.y-e.position.y};e.torque+=o.x*n.y-o.y*n.x};var t=function(e){for(var t={mass:0,area:0,inertia:0,centre:{x:0,y:0}},n=1===e.parts.length?0:1;n<e.parts.length;n++){var o=e.parts[n];t.mass+=o.mass,t.area+=o.area,
-t.inertia+=o.inertia,t.centre=r.add(t.centre,r.mult(o.position,o.mass!==1/0?o.mass:1))}return t.centre=r.div(t.centre,t.mass!==1/0?t.mass:e.parts.length),t}}()},{"../core/Common":14,"../core/Sleeping":22,"../geometry/Axes":25,"../geometry/Bounds":26,"../geometry/Vector":28,"../geometry/Vertices":29,"../render/Render":31}],2:[function(e,t,n){var o={};t.exports=o;var i=e("../core/Events"),r=e("../core/Common"),s=e("./Body");!function(){o.create=function(e){return r.extend({id:r.nextId(),type:"composite",parent:null,isModified:!1,bodies:[],constraints:[],composites:[],label:"Composite",plugin:{}},e)},o.setModified=function(e,t,n,i){if(e.isModified=t,n&&e.parent&&o.setModified(e.parent,t,n,i),i)for(var r=0;r<e.composites.length;r++){var s=e.composites[r];o.setModified(s,t,n,i)}},o.add=function(e,t){var n=[].concat(t);i.trigger(e,"beforeAdd",{object:t});for(var s=0;s<n.length;s++){var a=n[s];switch(a.type){case"body":if(a.parent!==a){r.warn("Composite.add: skipped adding a compound body part (you must add its parent instead)");
-break}o.addBody(e,a);break;case"constraint":o.addConstraint(e,a);break;case"composite":o.addComposite(e,a);break;case"mouseConstraint":o.addConstraint(e,a.constraint)}}return i.trigger(e,"afterAdd",{object:t}),e},o.remove=function(e,t,n){var r=[].concat(t);i.trigger(e,"beforeRemove",{object:t});for(var s=0;s<r.length;s++){var a=r[s];switch(a.type){case"body":o.removeBody(e,a,n);break;case"constraint":o.removeConstraint(e,a,n);break;case"composite":o.removeComposite(e,a,n);break;case"mouseConstraint":o.removeConstraint(e,a.constraint)}}return i.trigger(e,"afterRemove",{object:t}),e},o.addComposite=function(e,t){return e.composites.push(t),t.parent=e,o.setModified(e,!0,!0,!1),e},o.removeComposite=function(e,t,n){var i=r.indexOf(e.composites,t);if(i!==-1&&(o.removeCompositeAt(e,i),o.setModified(e,!0,!0,!1)),n)for(var s=0;s<e.composites.length;s++)o.removeComposite(e.composites[s],t,!0);return e},o.removeCompositeAt=function(e,t){return e.composites.splice(t,1),o.setModified(e,!0,!0,!1),e},
-o.addBody=function(e,t){return e.bodies.push(t),o.setModified(e,!0,!0,!1),e},o.removeBody=function(e,t,n){var i=r.indexOf(e.bodies,t);if(i!==-1&&(o.removeBodyAt(e,i),o.setModified(e,!0,!0,!1)),n)for(var s=0;s<e.composites.length;s++)o.removeBody(e.composites[s],t,!0);return e},o.removeBodyAt=function(e,t){return e.bodies.splice(t,1),o.setModified(e,!0,!0,!1),e},o.addConstraint=function(e,t){return e.constraints.push(t),o.setModified(e,!0,!0,!1),e},o.removeConstraint=function(e,t,n){var i=r.indexOf(e.constraints,t);if(i!==-1&&o.removeConstraintAt(e,i),n)for(var s=0;s<e.composites.length;s++)o.removeConstraint(e.composites[s],t,!0);return e},o.removeConstraintAt=function(e,t){return e.constraints.splice(t,1),o.setModified(e,!0,!0,!1),e},o.clear=function(e,t,n){if(n)for(var i=0;i<e.composites.length;i++)o.clear(e.composites[i],t,!0);return t?e.bodies=e.bodies.filter(function(e){return e.isStatic}):e.bodies.length=0,e.constraints.length=0,e.composites.length=0,o.setModified(e,!0,!0,!1),e},o.allBodies=function(e){
-for(var t=[].concat(e.bodies),n=0;n<e.composites.length;n++)t=t.concat(o.allBodies(e.composites[n]));return t},o.allConstraints=function(e){for(var t=[].concat(e.constraints),n=0;n<e.composites.length;n++)t=t.concat(o.allConstraints(e.composites[n]));return t},o.allComposites=function(e){for(var t=[].concat(e.composites),n=0;n<e.composites.length;n++)t=t.concat(o.allComposites(e.composites[n]));return t},o.get=function(e,t,n){var i,r;switch(n){case"body":i=o.allBodies(e);break;case"constraint":i=o.allConstraints(e);break;case"composite":i=o.allComposites(e).concat(e)}return i?(r=i.filter(function(e){return e.id.toString()===t.toString()}),0===r.length?null:r[0]):null},o.move=function(e,t,n){return o.remove(e,t),o.add(n,t),e},o.rebase=function(e){for(var t=o.allBodies(e).concat(o.allConstraints(e)).concat(o.allComposites(e)),n=0;n<t.length;n++)t[n].id=r.nextId();return o.setModified(e,!0,!0,!1),e},o.translate=function(e,t,n){for(var i=n?o.allBodies(e):e.bodies,r=0;r<i.length;r++)s.translate(i[r],t);
-return o.setModified(e,!0,!0,!1),e},o.rotate=function(e,t,n,i){for(var r=Math.cos(t),a=Math.sin(t),l=i?o.allBodies(e):e.bodies,c=0;c<l.length;c++){var d=l[c],u=d.position.x-n.x,p=d.position.y-n.y;s.setPosition(d,{x:n.x+(u*r-p*a),y:n.y+(u*a+p*r)}),s.rotate(d,t)}return o.setModified(e,!0,!0,!1),e},o.scale=function(e,t,n,i,r){for(var a=r?o.allBodies(e):e.bodies,l=0;l<a.length;l++){var c=a[l],d=c.position.x-i.x,u=c.position.y-i.y;s.setPosition(c,{x:i.x+d*t,y:i.y+u*n}),s.scale(c,t,n)}return o.setModified(e,!0,!0,!1),e}}()},{"../core/Common":14,"../core/Events":16,"./Body":1}],3:[function(e,t,n){var o={};t.exports=o;var i=e("./Composite"),r=(e("../constraint/Constraint"),e("../core/Common"));!function(){o.create=function(e){var t=i.create(),n={label:"World",gravity:{x:0,y:1,scale:.001},bounds:{min:{x:-(1/0),y:-(1/0)},max:{x:1/0,y:1/0}}};return r.extend(t,n,e)}}()},{"../constraint/Constraint":12,"../core/Common":14,"./Composite":2}],4:[function(e,t,n){var o={};t.exports=o,function(){o.create=function(e){
-return{id:o.id(e),vertex:e,normalImpulse:0,tangentImpulse:0}},o.id=function(e){return e.body.id+"_"+e.index}}()},{}],5:[function(e,t,n){var o={};t.exports=o;var i=e("./SAT"),r=e("./Pair"),s=e("../geometry/Bounds");!function(){o.collisions=function(e,t){for(var n=[],a=t.pairs.table,l=0;l<e.length;l++){var c=e[l][0],d=e[l][1];if((!c.isStatic&&!c.isSleeping||!d.isStatic&&!d.isSleeping)&&o.canCollide(c.collisionFilter,d.collisionFilter)&&s.overlaps(c.bounds,d.bounds))for(var u=c.parts.length>1?1:0;u<c.parts.length;u++)for(var p=c.parts[u],f=d.parts.length>1?1:0;f<d.parts.length;f++){var m=d.parts[f];if(p===c&&m===d||s.overlaps(p.bounds,m.bounds)){var v,y=r.id(p,m),g=a[y];v=g&&g.isActive?g.collision:null;var x=i.collides(p,m,v);x.collided&&n.push(x)}}}return n},o.canCollide=function(e,t){return e.group===t.group&&0!==e.group?e.group>0:0!==(e.mask&t.category)&&0!==(t.mask&e.category)}}()},{"../geometry/Bounds":26,"./Pair":7,"./SAT":11}],6:[function(e,t,n){var o={};t.exports=o;var i=e("./Pair"),r=e("./Detector"),s=e("../core/Common");
-!function(){o.create=function(e){var t={controller:o,detector:r.collisions,buckets:{},pairs:{},pairsList:[],bucketWidth:48,bucketHeight:48};return s.extend(t,e)},o.update=function(n,o,i,r){var s,p,f,m,v,y=i.world,g=n.buckets,x=!1;for(s=0;s<o.length;s++){var h=o[s];if((!h.isSleeping||r)&&!(h.bounds.max.x<y.bounds.min.x||h.bounds.min.x>y.bounds.max.x||h.bounds.max.y<y.bounds.min.y||h.bounds.min.y>y.bounds.max.y)){var b=t(n,h);if(!h.region||b.id!==h.region.id||r){h.region&&!r||(h.region=b);var w=e(b,h.region);for(p=w.startCol;p<=w.endCol;p++)for(f=w.startRow;f<=w.endRow;f++){v=a(p,f),m=g[v];var S=p>=b.startCol&&p<=b.endCol&&f>=b.startRow&&f<=b.endRow,C=p>=h.region.startCol&&p<=h.region.endCol&&f>=h.region.startRow&&f<=h.region.endRow;!S&&C&&C&&m&&d(n,m,h),(h.region===b||S&&!C||r)&&(m||(m=l(g,v)),c(n,m,h))}h.region=b,x=!0}}}x&&(n.pairsList=u(n))},o.clear=function(e){e.buckets={},e.pairs={},e.pairsList=[]};var e=function(e,t){var o=Math.min(e.startCol,t.startCol),i=Math.max(e.endCol,t.endCol),r=Math.min(e.startRow,t.startRow),s=Math.max(e.endRow,t.endRow);
+anglePrev:e.anglePrev||e.angle,vertices:e.vertices,parts:e.parts||[e],isStatic:e.isStatic,isSleeping:e.isSleeping,parent:e.parent||e}),i.rotate(e.vertices,e.angle,e.position),c.rotate(e.axes,e.angle),l.update(e.bounds,e.vertices,e.velocity),o.set(e,{axes:t.axes||e.axes,area:t.area||e.area,mass:t.mass||e.mass,inertia:t.inertia||e.inertia});var n=e.isStatic?"#2e2b44":a.choose(["#006BA6","#0496FF","#FFBC42","#D81159","#8F2D56"]),s="#000";e.render.fillStyle=e.render.fillStyle||n,e.render.strokeStyle=e.render.strokeStyle||s,e.render.sprite.xOffset+=-(e.bounds.min.x-e.position.x)/(e.bounds.max.x-e.bounds.min.x),e.render.sprite.yOffset+=-(e.bounds.min.y-e.position.y)/(e.bounds.max.y-e.bounds.min.y)};o.set=function(e,t,n){var i;"string"==typeof t&&(i=t,t={},t[i]=n);for(i in t)if(n=t[i],t.hasOwnProperty(i))switch(i){case"isStatic":o.setStatic(e,n);break;case"isSleeping":s.set(e,n);break;case"mass":o.setMass(e,n);break;case"density":o.setDensity(e,n);break;case"inertia":o.setInertia(e,n);break;case"vertices":
+o.setVertices(e,n);break;case"position":o.setPosition(e,n);break;case"angle":o.setAngle(e,n);break;case"velocity":o.setVelocity(e,n);break;case"angularVelocity":o.setAngularVelocity(e,n);break;case"parts":o.setParts(e,n);break;default:e[i]=n}},o.setStatic=function(e,t){for(var n=0;n<e.parts.length;n++){var o=e.parts[n];o.isStatic=t,t?(o._original={restitution:o.restitution,friction:o.friction,mass:o.mass,inertia:o.inertia,density:o.density,inverseMass:o.inverseMass,inverseInertia:o.inverseInertia},o.restitution=0,o.friction=1,o.mass=o.inertia=o.density=1/0,o.inverseMass=o.inverseInertia=0,o.positionPrev.x=o.position.x,o.positionPrev.y=o.position.y,o.anglePrev=o.angle,o.angularVelocity=0,o.speed=0,o.angularSpeed=0,o.motion=0):o._original&&(o.restitution=o._original.restitution,o.friction=o._original.friction,o.mass=o._original.mass,o.inertia=o._original.inertia,o.density=o._original.density,o.inverseMass=o._original.inverseMass,o.inverseInertia=o._original.inverseInertia,delete o._original);
+}},o.setMass=function(e,t){e.mass=t,e.inverseMass=1/e.mass,e.density=e.mass/e.area},o.setDensity=function(e,t){o.setMass(e,t*e.area),e.density=t},o.setInertia=function(e,t){e.inertia=t,e.inverseInertia=1/e.inertia},o.setVertices=function(e,t){t[0].body===e?e.vertices=t:e.vertices=i.create(t,e),e.axes=c.fromVertices(e.vertices),e.area=i.area(e.vertices),o.setMass(e,e.density*e.area);var n=i.centre(e.vertices);i.translate(e.vertices,n,-1),o.setInertia(e,o._inertiaScale*i.inertia(e.vertices,e.mass)),i.translate(e.vertices,e.position),l.update(e.bounds,e.vertices,e.velocity)},o.setParts=function(e,n,r){var s;for(n=n.slice(0),e.parts.length=0,e.parts.push(e),e.parent=e,s=0;s<n.length;s++){var a=n[s];a!==e&&(a.parent=e,e.parts.push(a))}if(1!==e.parts.length){if(r="undefined"==typeof r||r){var l=[];for(s=0;s<n.length;s++)l=l.concat(n[s].vertices);i.clockwiseSort(l);var c=i.hull(l),d=i.centre(c);o.setVertices(e,c),i.translate(e.vertices,d)}var u=t(e);e.area=u.area,e.parent=e,e.position.x=u.centre.x,
+e.position.y=u.centre.y,e.positionPrev.x=u.centre.x,e.positionPrev.y=u.centre.y,o.setMass(e,u.mass),o.setInertia(e,u.inertia),o.setPosition(e,u.centre)}},o.setPosition=function(e,t){var n=r.sub(t,e.position);e.positionPrev.x+=n.x,e.positionPrev.y+=n.y;for(var o=0;o<e.parts.length;o++){var s=e.parts[o];s.position.x+=n.x,s.position.y+=n.y,i.translate(s.vertices,n),l.update(s.bounds,s.vertices,e.velocity)}},o.setAngle=function(e,t){var n=t-e.angle;e.anglePrev+=n;for(var o=0;o<e.parts.length;o++){var s=e.parts[o];s.angle+=n,i.rotate(s.vertices,n,e.position),c.rotate(s.axes,n),l.update(s.bounds,s.vertices,e.velocity),o>0&&r.rotateAbout(s.position,n,e.position,s.position)}},o.setVelocity=function(e,t){e.positionPrev.x=e.position.x-t.x,e.positionPrev.y=e.position.y-t.y,e.velocity.x=t.x,e.velocity.y=t.y,e.speed=r.magnitude(e.velocity)},o.setAngularVelocity=function(e,t){e.anglePrev=e.angle-t,e.angularVelocity=t,e.angularSpeed=Math.abs(e.angularVelocity)},o.translate=function(e,t){o.setPosition(e,r.add(e.position,t));
+},o.rotate=function(e,t,n){if(n){var i=Math.cos(t),r=Math.sin(t),s=e.position.x-n.x,a=e.position.y-n.y;o.setPosition(e,{x:n.x+(s*i-a*r),y:n.y+(s*r+a*i)}),o.setAngle(e,e.angle+t)}else o.setAngle(e,e.angle+t)},o.scale=function(e,n,r,s){for(var a=0;a<e.parts.length;a++){var d=e.parts[a];i.scale(d.vertices,n,r,e.position),d.axes=c.fromVertices(d.vertices),e.isStatic||(d.area=i.area(d.vertices),o.setMass(d,e.density*d.area),i.translate(d.vertices,{x:-d.position.x,y:-d.position.y}),o.setInertia(d,i.inertia(d.vertices,d.mass)),i.translate(d.vertices,{x:d.position.x,y:d.position.y})),l.update(d.bounds,d.vertices,e.velocity)}if(e.circleRadius&&(n===r?e.circleRadius*=n:e.circleRadius=null),!e.isStatic){var u=t(e);e.area=u.area,o.setMass(e,u.mass),o.setInertia(e,u.inertia)}},o.update=function(e,t,n,o){var s=Math.pow(t*n*e.timeScale,2),a=1-e.frictionAir*n*e.timeScale,d=e.position.x-e.positionPrev.x,u=e.position.y-e.positionPrev.y;e.velocity.x=d*a*o+e.force.x/e.mass*s,e.velocity.y=u*a*o+e.force.y/e.mass*s,
+e.positionPrev.x=e.position.x,e.positionPrev.y=e.position.y,e.position.x+=e.velocity.x,e.position.y+=e.velocity.y,e.angularVelocity=(e.angle-e.anglePrev)*a*o+e.torque/e.inertia*s,e.anglePrev=e.angle,e.angle+=e.angularVelocity,e.speed=r.magnitude(e.velocity),e.angularSpeed=Math.abs(e.angularVelocity);for(var p=0;p<e.parts.length;p++){var f=e.parts[p];i.translate(f.vertices,e.velocity),p>0&&(f.position.x+=e.velocity.x,f.position.y+=e.velocity.y),0!==e.angularVelocity&&(i.rotate(f.vertices,e.angularVelocity,e.position),c.rotate(f.axes,e.angularVelocity),p>0&&r.rotateAbout(f.position,e.angularVelocity,e.position,f.position)),l.update(f.bounds,f.vertices,e.velocity)}},o.applyForce=function(e,t,n){e.force.x+=n.x,e.force.y+=n.y;var o={x:t.x-e.position.x,y:t.y-e.position.y};e.torque+=o.x*n.y-o.y*n.x};var t=function(e){for(var t={mass:0,area:0,inertia:0,centre:{x:0,y:0}},n=1===e.parts.length?0:1;n<e.parts.length;n++){var o=e.parts[n];t.mass+=o.mass,t.area+=o.area,t.inertia+=o.inertia,t.centre=r.add(t.centre,r.mult(o.position,o.mass!==1/0?o.mass:1));
+}return t.centre=r.div(t.centre,t.mass!==1/0?t.mass:e.parts.length),t}}()},{"../core/Common":14,"../core/Sleeping":22,"../geometry/Axes":25,"../geometry/Bounds":26,"../geometry/Vector":28,"../geometry/Vertices":29,"../render/Render":31}],2:[function(e,t,n){var o={};t.exports=o;var i=e("../core/Events"),r=e("../core/Common"),s=e("./Body");!function(){o.create=function(e){return r.extend({id:r.nextId(),type:"composite",parent:null,isModified:!1,bodies:[],constraints:[],composites:[],label:"Composite",plugin:{}},e)},o.setModified=function(e,t,n,i){if(e.isModified=t,n&&e.parent&&o.setModified(e.parent,t,n,i),i)for(var r=0;r<e.composites.length;r++){var s=e.composites[r];o.setModified(s,t,n,i)}},o.add=function(e,t){var n=[].concat(t);i.trigger(e,"beforeAdd",{object:t});for(var s=0;s<n.length;s++){var a=n[s];switch(a.type){case"body":if(a.parent!==a){r.warn("Composite.add: skipped adding a compound body part (you must add its parent instead)");break}o.addBody(e,a);break;case"constraint":o.addConstraint(e,a);
+break;case"composite":o.addComposite(e,a);break;case"mouseConstraint":o.addConstraint(e,a.constraint)}}return i.trigger(e,"afterAdd",{object:t}),e},o.remove=function(e,t,n){var r=[].concat(t);i.trigger(e,"beforeRemove",{object:t});for(var s=0;s<r.length;s++){var a=r[s];switch(a.type){case"body":o.removeBody(e,a,n);break;case"constraint":o.removeConstraint(e,a,n);break;case"composite":o.removeComposite(e,a,n);break;case"mouseConstraint":o.removeConstraint(e,a.constraint)}}return i.trigger(e,"afterRemove",{object:t}),e},o.addComposite=function(e,t){return e.composites.push(t),t.parent=e,o.setModified(e,!0,!0,!1),e},o.removeComposite=function(e,t,n){var i=r.indexOf(e.composites,t);if(i!==-1&&(o.removeCompositeAt(e,i),o.setModified(e,!0,!0,!1)),n)for(var s=0;s<e.composites.length;s++)o.removeComposite(e.composites[s],t,!0);return e},o.removeCompositeAt=function(e,t){return e.composites.splice(t,1),o.setModified(e,!0,!0,!1),e},o.addBody=function(e,t){return e.bodies.push(t),o.setModified(e,!0,!0,!1),
+e},o.removeBody=function(e,t,n){var i=r.indexOf(e.bodies,t);if(i!==-1&&(o.removeBodyAt(e,i),o.setModified(e,!0,!0,!1)),n)for(var s=0;s<e.composites.length;s++)o.removeBody(e.composites[s],t,!0);return e},o.removeBodyAt=function(e,t){return e.bodies.splice(t,1),o.setModified(e,!0,!0,!1),e},o.addConstraint=function(e,t){return e.constraints.push(t),o.setModified(e,!0,!0,!1),e},o.removeConstraint=function(e,t,n){var i=r.indexOf(e.constraints,t);if(i!==-1&&o.removeConstraintAt(e,i),n)for(var s=0;s<e.composites.length;s++)o.removeConstraint(e.composites[s],t,!0);return e},o.removeConstraintAt=function(e,t){return e.constraints.splice(t,1),o.setModified(e,!0,!0,!1),e},o.clear=function(e,t,n){if(n)for(var i=0;i<e.composites.length;i++)o.clear(e.composites[i],t,!0);return t?e.bodies=e.bodies.filter(function(e){return e.isStatic}):e.bodies.length=0,e.constraints.length=0,e.composites.length=0,o.setModified(e,!0,!0,!1),e},o.allBodies=function(e){for(var t=[].concat(e.bodies),n=0;n<e.composites.length;n++)t=t.concat(o.allBodies(e.composites[n]));
+return t},o.allConstraints=function(e){for(var t=[].concat(e.constraints),n=0;n<e.composites.length;n++)t=t.concat(o.allConstraints(e.composites[n]));return t},o.allComposites=function(e){for(var t=[].concat(e.composites),n=0;n<e.composites.length;n++)t=t.concat(o.allComposites(e.composites[n]));return t},o.get=function(e,t,n){var i,r;switch(n){case"body":i=o.allBodies(e);break;case"constraint":i=o.allConstraints(e);break;case"composite":i=o.allComposites(e).concat(e)}return i?(r=i.filter(function(e){return e.id.toString()===t.toString()}),0===r.length?null:r[0]):null},o.move=function(e,t,n){return o.remove(e,t),o.add(n,t),e},o.rebase=function(e){for(var t=o.allBodies(e).concat(o.allConstraints(e)).concat(o.allComposites(e)),n=0;n<t.length;n++)t[n].id=r.nextId();return o.setModified(e,!0,!0,!1),e},o.translate=function(e,t,n){for(var i=n?o.allBodies(e):e.bodies,r=0;r<i.length;r++)s.translate(i[r],t);return o.setModified(e,!0,!0,!1),e},o.rotate=function(e,t,n,i){for(var r=Math.cos(t),a=Math.sin(t),l=i?o.allBodies(e):e.bodies,c=0;c<l.length;c++){
+var d=l[c],u=d.position.x-n.x,p=d.position.y-n.y;s.setPosition(d,{x:n.x+(u*r-p*a),y:n.y+(u*a+p*r)}),s.rotate(d,t)}return o.setModified(e,!0,!0,!1),e},o.scale=function(e,t,n,i,r){for(var a=r?o.allBodies(e):e.bodies,l=0;l<a.length;l++){var c=a[l],d=c.position.x-i.x,u=c.position.y-i.y;s.setPosition(c,{x:i.x+d*t,y:i.y+u*n}),s.scale(c,t,n)}return o.setModified(e,!0,!0,!1),e},o.bounds=function(e){for(var t=Matter.Composite.allBodies(e),n=[],o=0;o<t.length;o+=1){var i=t[o];n.push(i.bounds.min,i.bounds.max)}return Matter.Bounds.create(n)}}()},{"../core/Common":14,"../core/Events":16,"./Body":1}],3:[function(e,t,n){var o={};t.exports=o;var i=e("./Composite"),r=(e("../constraint/Constraint"),e("../core/Common"));!function(){o.create=function(e){var t=i.create(),n={label:"World",gravity:{x:0,y:1,scale:.001},bounds:{min:{x:-(1/0),y:-(1/0)},max:{x:1/0,y:1/0}}};return r.extend(t,n,e)}}()},{"../constraint/Constraint":12,"../core/Common":14,"./Composite":2}],4:[function(e,t,n){var o={};t.exports=o,function(){
+o.create=function(e){return{id:o.id(e),vertex:e,normalImpulse:0,tangentImpulse:0}},o.id=function(e){return e.body.id+"_"+e.index}}()},{}],5:[function(e,t,n){var o={};t.exports=o;var i=e("./SAT"),r=e("./Pair"),s=e("../geometry/Bounds");!function(){o.collisions=function(e,t){for(var n=[],a=t.pairs.table,l=0;l<e.length;l++){var c=e[l][0],d=e[l][1];if((!c.isStatic&&!c.isSleeping||!d.isStatic&&!d.isSleeping)&&o.canCollide(c.collisionFilter,d.collisionFilter)&&s.overlaps(c.bounds,d.bounds))for(var u=c.parts.length>1?1:0;u<c.parts.length;u++)for(var p=c.parts[u],f=d.parts.length>1?1:0;f<d.parts.length;f++){var m=d.parts[f];if(p===c&&m===d||s.overlaps(p.bounds,m.bounds)){var v,y=r.id(p,m),g=a[y];v=g&&g.isActive?g.collision:null;var x=i.collides(p,m,v);x.collided&&n.push(x)}}}return n},o.canCollide=function(e,t){return e.group===t.group&&0!==e.group?e.group>0:0!==(e.mask&t.category)&&0!==(t.mask&e.category)}}()},{"../geometry/Bounds":26,"./Pair":7,"./SAT":11}],6:[function(e,t,n){var o={};t.exports=o;
+var i=e("./Pair"),r=e("./Detector"),s=e("../core/Common");!function(){o.create=function(e){var t={controller:o,detector:r.collisions,buckets:{},pairs:{},pairsList:[],bucketWidth:48,bucketHeight:48};return s.extend(t,e)},o.update=function(n,o,i,r){var s,p,f,m,v,y=i.world,g=n.buckets,x=!1;for(s=0;s<o.length;s++){var h=o[s];if((!h.isSleeping||r)&&!(h.bounds.max.x<y.bounds.min.x||h.bounds.min.x>y.bounds.max.x||h.bounds.max.y<y.bounds.min.y||h.bounds.min.y>y.bounds.max.y)){var b=t(n,h);if(!h.region||b.id!==h.region.id||r){h.region&&!r||(h.region=b);var w=e(b,h.region);for(p=w.startCol;p<=w.endCol;p++)for(f=w.startRow;f<=w.endRow;f++){v=a(p,f),m=g[v];var S=p>=b.startCol&&p<=b.endCol&&f>=b.startRow&&f<=b.endRow,C=p>=h.region.startCol&&p<=h.region.endCol&&f>=h.region.startRow&&f<=h.region.endRow;!S&&C&&C&&m&&d(n,m,h),(h.region===b||S&&!C||r)&&(m||(m=l(g,v)),c(n,m,h))}h.region=b,x=!0}}}x&&(n.pairsList=u(n))},o.clear=function(e){e.buckets={},e.pairs={},e.pairsList=[]};var e=function(e,t){var o=Math.min(e.startCol,t.startCol),i=Math.max(e.endCol,t.endCol),r=Math.min(e.startRow,t.startRow),s=Math.max(e.endRow,t.endRow);
 return n(o,i,r,s)},t=function(e,t){var o=t.bounds,i=Math.floor(o.min.x/e.bucketWidth),r=Math.floor(o.max.x/e.bucketWidth),s=Math.floor(o.min.y/e.bucketHeight),a=Math.floor(o.max.y/e.bucketHeight);return n(i,r,s,a)},n=function(e,t,n,o){return{id:e+","+t+","+n+","+o,startCol:e,endCol:t,startRow:n,endRow:o}},a=function(e,t){return"C"+e+"R"+t},l=function(e,t){var n=e[t]=[];return n},c=function(e,t,n){for(var o=0;o<t.length;o++){var r=t[o];if(!(n.id===r.id||n.isStatic&&r.isStatic)){var s=i.id(n,r),a=e.pairs[s];a?a[2]+=1:e.pairs[s]=[n,r,1]}}t.push(n)},d=function(e,t,n){t.splice(s.indexOf(t,n),1);for(var o=0;o<t.length;o++){var r=t[o],a=i.id(n,r),l=e.pairs[a];l&&(l[2]-=1)}},u=function(e){var t,n,o=[];t=s.keys(e.pairs);for(var i=0;i<t.length;i++)n=e.pairs[t[i]],n[2]>0?o.push(n):delete e.pairs[t[i]];return o}}()},{"../core/Common":14,"./Detector":5,"./Pair":7}],7:[function(e,t,n){var o={};t.exports=o;var i=e("./Contact");!function(){o.create=function(e,t){var n=e.bodyA,i=e.bodyB,r=e.parentA,s=e.parentB,a={
 id:o.id(n,i),bodyA:n,bodyB:i,contacts:{},activeContacts:[],separation:0,isActive:!0,isSensor:n.isSensor||i.isSensor,timeCreated:t,timeUpdated:t,inverseMass:r.inverseMass+s.inverseMass,friction:Math.min(r.friction,s.friction),frictionStatic:Math.max(r.frictionStatic,s.frictionStatic),restitution:Math.max(r.restitution,s.restitution),slop:Math.max(r.slop,s.slop)};return o.update(a,e,t),a},o.update=function(e,t,n){var r=e.contacts,s=t.supports,a=e.activeContacts,l=t.parentA,c=t.parentB;if(e.collision=t,e.inverseMass=l.inverseMass+c.inverseMass,e.friction=Math.min(l.friction,c.friction),e.frictionStatic=Math.max(l.frictionStatic,c.frictionStatic),e.restitution=Math.max(l.restitution,c.restitution),e.slop=Math.max(l.slop,c.slop),a.length=0,t.collided){for(var d=0;d<s.length;d++){var u=s[d],p=i.id(u),f=r[p];f?a.push(f):a.push(r[p]=i.create(u))}e.separation=t.depth,o.setActive(e,!0,n)}else e.isActive===!0&&o.setActive(e,!1,n)},o.setActive=function(e,t,n){t?(e.isActive=!0,e.timeUpdated=n):(e.isActive=!1,
 e.activeContacts.length=0)},o.id=function(e,t){return e.id<t.id?"A"+e.id+"B"+t.id:"A"+t.id+"B"+e.id}}()},{"./Contact":4}],8:[function(e,t,n){var o={};t.exports=o;var i=e("./Pair"),r=e("../core/Common");!function(){var e=1e3;o.create=function(e){return r.extend({table:{},list:[],collisionStart:[],collisionActive:[],collisionEnd:[]},e)},o.update=function(e,t,n){var o,s,a,l,c=e.list,d=e.table,u=e.collisionStart,p=e.collisionEnd,f=e.collisionActive,m=[];for(u.length=0,p.length=0,f.length=0,l=0;l<t.length;l++)o=t[l],o.collided&&(s=i.id(o.bodyA,o.bodyB),m.push(s),a=d[s],a?(a.isActive?f.push(a):u.push(a),i.update(a,o,n)):(a=i.create(o,n),d[s]=a,u.push(a),c.push(a)));for(l=0;l<c.length;l++)a=c[l],a.isActive&&r.indexOf(m,a.id)===-1&&(i.setActive(a,!1,n),p.push(a))},o.removeOld=function(t,n){var o,i,r,s,a=t.list,l=t.table,c=[];for(s=0;s<a.length;s++)o=a[s],i=o.collision,i.bodyA.isSleeping||i.bodyB.isSleeping?o.timeUpdated=n:n-o.timeUpdated>e&&c.push(s);for(s=0;s<c.length;s++)r=c[s]-s,o=a[r],delete l[o.id],
 a.splice(r,1)},o.clear=function(e){return e.table={},e.list.length=0,e.collisionStart.length=0,e.collisionActive.length=0,e.collisionEnd.length=0,e}}()},{"../core/Common":14,"./Pair":7}],9:[function(e,t,n){var o={};t.exports=o;var i=e("../geometry/Vector"),r=e("./SAT"),s=e("../geometry/Bounds"),a=e("../factory/Bodies"),l=e("../geometry/Vertices");!function(){o.ray=function(e,t,n,o){o=o||1e-100;for(var l=i.angle(t,n),c=i.magnitude(i.sub(t,n)),d=.5*(n.x+t.x),u=.5*(n.y+t.y),p=a.rectangle(d,u,c,o,{angle:l}),f=[],m=0;m<e.length;m++){var v=e[m];if(s.overlaps(v.bounds,p.bounds))for(var y=1===v.parts.length?0:1;y<v.parts.length;y++){var g=v.parts[y];if(s.overlaps(g.bounds,p.bounds)){var x=r.collides(g,p);if(x.collided){x.body=x.bodyA=x.bodyB=v,f.push(x);break}}}}return f},o.region=function(e,t,n){for(var o=[],i=0;i<e.length;i++){var r=e[i],a=s.overlaps(r.bounds,t);(a&&!n||!a&&n)&&o.push(r)}return o},o.point=function(e,t){for(var n=[],o=0;o<e.length;o++){var i=e[o];if(s.contains(i.bounds,t))for(var r=1===i.parts.length?0:1;r<i.parts.length;r++){
 var a=i.parts[r];if(s.contains(a.bounds,t)&&l.contains(a.vertices,t)){n.push(i);break}}}return n}}()},{"../factory/Bodies":23,"../geometry/Bounds":26,"../geometry/Vector":28,"../geometry/Vertices":29,"./SAT":11}],10:[function(e,t,n){var o={};t.exports=o;var i=e("../geometry/Vertices"),r=e("../geometry/Vector"),s=e("../core/Common"),a=e("../geometry/Bounds");!function(){o._restingThresh=4,o._restingThreshTangent=6,o._positionDampen=.9,o._positionWarming=.8,o._frictionNormalMultiplier=5,o.preSolvePosition=function(e){var t,n,o;for(t=0;t<e.length;t++)n=e[t],n.isActive&&(o=n.activeContacts.length,n.collision.parentA.totalContacts+=o,n.collision.parentB.totalContacts+=o)},o.solvePosition=function(e,t){var n,i,s,a,l,c,d,u,p,f=r._temp[0],m=r._temp[1],v=r._temp[2],y=r._temp[3];for(n=0;n<e.length;n++)i=e[n],i.isActive&&!i.isSensor&&(s=i.collision,a=s.parentA,l=s.parentB,c=s.normal,d=r.sub(r.add(l.positionImpulse,l.position,f),r.add(a.positionImpulse,r.sub(l.position,s.penetration,m),v),y),i.separation=r.dot(c,d));
-for(n=0;n<e.length;n++)i=e[n],!i.isActive||i.isSensor||i.separation<0||(s=i.collision,a=s.parentA,l=s.parentB,c=s.normal,p=(i.separation-i.slop)*t,(a.isStatic||l.isStatic)&&(p*=2),a.isStatic||a.isSleeping||(u=o._positionDampen/a.totalContacts,a.positionImpulse.x+=c.x*p*u,a.positionImpulse.y+=c.y*p*u),l.isStatic||l.isSleeping||(u=o._positionDampen/l.totalContacts,l.positionImpulse.x-=c.x*p*u,l.positionImpulse.y-=c.y*p*u))},o.postSolvePosition=function(e){for(var t=0;t<e.length;t++){var n=e[t];if(n.totalContacts=0,0!==n.positionImpulse.x||0!==n.positionImpulse.y){for(var s=0;s<n.parts.length;s++){var l=n.parts[s];i.translate(l.vertices,n.positionImpulse),a.update(l.bounds,l.vertices,n.velocity),l.position.x+=n.positionImpulse.x,l.position.y+=n.positionImpulse.y}n.positionPrev.x+=n.positionImpulse.x,n.positionPrev.y+=n.positionImpulse.y,r.dot(n.positionImpulse,n.velocity)<0?(n.positionImpulse.x=0,n.positionImpulse.y=0):(n.positionImpulse.x*=o._positionWarming,n.positionImpulse.y*=o._positionWarming);
-}}},o.preSolveVelocity=function(e){var t,n,o,i,s,a,l,c,d,u,p,f,m,v,y=r._temp[0],g=r._temp[1];for(t=0;t<e.length;t++)if(o=e[t],o.isActive&&!o.isSensor)for(i=o.activeContacts,s=o.collision,a=s.parentA,l=s.parentB,c=s.normal,d=s.tangent,n=0;n<i.length;n++)u=i[n],p=u.vertex,f=u.normalImpulse,m=u.tangentImpulse,0===f&&0===m||(y.x=c.x*f+d.x*m,y.y=c.y*f+d.y*m,a.isStatic||a.isSleeping||(v=r.sub(p,a.position,g),a.positionPrev.x+=y.x*a.inverseMass,a.positionPrev.y+=y.y*a.inverseMass,a.anglePrev+=r.cross(v,y)*a.inverseInertia),l.isStatic||l.isSleeping||(v=r.sub(p,l.position,g),l.positionPrev.x-=y.x*l.inverseMass,l.positionPrev.y-=y.y*l.inverseMass,l.anglePrev-=r.cross(v,y)*l.inverseInertia))},o.solveVelocity=function(e,t){for(var n=t*t,i=r._temp[0],a=r._temp[1],l=r._temp[2],c=r._temp[3],d=r._temp[4],u=r._temp[5],p=0;p<e.length;p++){var f=e[p];if(f.isActive&&!f.isSensor){var m=f.collision,v=m.parentA,y=m.parentB,g=m.normal,x=m.tangent,h=f.activeContacts,b=1/h.length;v.velocity.x=v.position.x-v.positionPrev.x,
-v.velocity.y=v.position.y-v.positionPrev.y,y.velocity.x=y.position.x-y.positionPrev.x,y.velocity.y=y.position.y-y.positionPrev.y,v.angularVelocity=v.angle-v.anglePrev,y.angularVelocity=y.angle-y.anglePrev;for(var w=0;w<h.length;w++){var S=h[w],C=S.vertex,A=r.sub(C,v.position,a),P=r.sub(C,y.position,l),B=r.add(v.velocity,r.mult(r.perp(A),v.angularVelocity),c),M=r.add(y.velocity,r.mult(r.perp(P),y.angularVelocity),d),k=r.sub(B,M,u),I=r.dot(g,k),T=r.dot(x,k),V=Math.abs(T),R=s.sign(T),_=(1+f.restitution)*I,E=s.clamp(f.separation+I,0,1)*o._frictionNormalMultiplier,L=T,F=1/0;V>f.friction*f.frictionStatic*E*n&&(F=V,L=s.clamp(f.friction*R*n,-F,F));var O=r.cross(A,g),W=r.cross(P,g),q=b/(v.inverseMass+y.inverseMass+v.inverseInertia*O*O+y.inverseInertia*W*W);if(_*=q,L*=q,I<0&&I*I>o._restingThresh*n)S.normalImpulse=0;else{var D=S.normalImpulse;S.normalImpulse=Math.min(S.normalImpulse+_,0),_=S.normalImpulse-D}if(T*T>o._restingThreshTangent*n)S.tangentImpulse=0;else{var N=S.tangentImpulse;S.tangentImpulse=s.clamp(S.tangentImpulse+L,-F,F),
-L=S.tangentImpulse-N}i.x=g.x*_+x.x*L,i.y=g.y*_+x.y*L,v.isStatic||v.isSleeping||(v.positionPrev.x+=i.x*v.inverseMass,v.positionPrev.y+=i.y*v.inverseMass,v.anglePrev+=r.cross(A,i)*v.inverseInertia),y.isStatic||y.isSleeping||(y.positionPrev.x-=i.x*y.inverseMass,y.positionPrev.y-=i.y*y.inverseMass,y.anglePrev-=r.cross(P,i)*y.inverseInertia)}}}}}()},{"../core/Common":14,"../geometry/Bounds":26,"../geometry/Vector":28,"../geometry/Vertices":29}],11:[function(e,t,n){var o={};t.exports=o;var i=e("../geometry/Vertices"),r=e("../geometry/Vector");!function(){o.collides=function(t,o,s){var a,l,c,d,u=!1;if(s){var p=t.parent,f=o.parent,m=p.speed*p.speed+p.angularSpeed*p.angularSpeed+f.speed*f.speed+f.angularSpeed*f.angularSpeed;u=s&&s.collided&&m<.2,d=s}else d={collided:!1,bodyA:t,bodyB:o};if(s&&u){var v=d.axisBody,y=v===t?o:t,g=[v.axes[s.axisNumber]];if(c=e(v.vertices,y.vertices,g),d.reused=!0,c.overlap<=0)return d.collided=!1,d}else{if(a=e(t.vertices,o.vertices,t.axes),a.overlap<=0)return d.collided=!1,
-d;if(l=e(o.vertices,t.vertices,o.axes),l.overlap<=0)return d.collided=!1,d;a.overlap<l.overlap?(c=a,d.axisBody=t):(c=l,d.axisBody=o),d.axisNumber=c.axisNumber}d.bodyA=t.id<o.id?t:o,d.bodyB=t.id<o.id?o:t,d.collided=!0,d.depth=c.overlap,d.parentA=d.bodyA.parent,d.parentB=d.bodyB.parent,t=d.bodyA,o=d.bodyB,r.dot(c.axis,r.sub(o.position,t.position))<0?d.normal={x:c.axis.x,y:c.axis.y}:d.normal={x:-c.axis.x,y:-c.axis.y},d.tangent=r.perp(d.normal),d.penetration=d.penetration||{},d.penetration.x=d.normal.x*d.depth,d.penetration.y=d.normal.y*d.depth;var x=n(t,o,d.normal),h=[];if(i.contains(t.vertices,x[0])&&h.push(x[0]),i.contains(t.vertices,x[1])&&h.push(x[1]),h.length<2){var b=n(o,t,r.neg(d.normal));i.contains(o.vertices,b[0])&&h.push(b[0]),h.length<2&&i.contains(o.vertices,b[1])&&h.push(b[1])}return h.length<1&&(h=[x[0]]),d.supports=h,d};var e=function(e,n,o){for(var i,s,a=r._temp[0],l=r._temp[1],c={overlap:Number.MAX_VALUE},d=0;d<o.length;d++){if(s=o[d],t(a,e,s),t(l,n,s),i=Math.min(a.max-l.min,l.max-a.min),
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-t.length="undefined"!=typeof t.length?t.length:i,t.id=t.id||c.nextId(),t.label=t.label||"Constraint",t.type="constraint",t.stiffness=t.stiffness||(t.length>0?1:.7),t.damping=t.damping||0,t.angularStiffness=t.angularStiffness||0,t.angleA=t.bodyA?t.bodyA.angle:t.angleA,t.angleB=t.bodyB?t.bodyB.angle:t.angleB,t.plugin={};var s={visible:!0,lineWidth:2,strokeStyle:"#ffffff",type:"line",anchors:!0};return 0===t.length?(s.type="pin",s.anchors=!1):t.stiffness<.9&&(s.type="spring"),t.render=c.extend(s,t.render),t},o.preSolveAll=function(e){for(var t=0;t<e.length;t+=1){var n=e[t],o=n.constraintImpulse;n.isStatic||0===o.x&&0===o.y&&0===o.angle||(n.position.x+=o.x,n.position.y+=o.y,n.angle+=o.angle)}},o.solveAll=function(e,t){for(var n=0;n<e.length;n+=1){var i=e[n],r=!i.bodyA||i.bodyA&&i.bodyA.isStatic,s=!i.bodyB||i.bodyB&&i.bodyB.isStatic;(r||s)&&o.solve(e[n],t)}for(n=0;n<e.length;n+=1)i=e[n],r=!i.bodyA||i.bodyA&&i.bodyA.isStatic,s=!i.bodyB||i.bodyB&&i.bodyB.isStatic,r||s||o.solve(e[n],t)},o.solve=function(e,t){
-var n=e.bodyA,i=e.bodyB,s=e.pointA,a=e.pointB;if(n||i){n&&!n.isStatic&&(r.rotate(s,n.angle-e.angleA,s),e.angleA=n.angle),i&&!i.isStatic&&(r.rotate(a,i.angle-e.angleB,a),e.angleB=i.angle);var l=s,c=a;if(n&&(l=r.add(n.position,s)),i&&(c=r.add(i.position,a)),l&&c){var d=r.sub(l,c),u=r.magnitude(d);u<o._minLength&&(u=o._minLength);var p,f,m,v,y,g=(u-e.length)/u,x=e.stiffness<1?e.stiffness*t:e.stiffness,h=r.mult(d,g*x),b=(n?n.inverseMass:0)+(i?i.inverseMass:0),w=(n?n.inverseInertia:0)+(i?i.inverseInertia:0),S=b+w;if(e.damping){var C=r.create();m=r.div(d,u),y=r.sub(i&&r.sub(i.position,i.positionPrev)||C,n&&r.sub(n.position,n.positionPrev)||C),v=r.dot(m,y)}n&&!n.isStatic&&(f=n.inverseMass/b,n.constraintImpulse.x-=h.x*f,n.constraintImpulse.y-=h.y*f,n.position.x-=h.x*f,n.position.y-=h.y*f,e.damping&&(n.positionPrev.x-=e.damping*m.x*v*f,n.positionPrev.y-=e.damping*m.y*v*f),p=r.cross(s,h)/S*o._torqueDampen*n.inverseInertia*(1-e.angularStiffness),n.constraintImpulse.angle-=p,n.angle-=p),i&&!i.isStatic&&(f=i.inverseMass/b,
-i.constraintImpulse.x+=h.x*f,i.constraintImpulse.y+=h.y*f,i.position.x+=h.x*f,i.position.y+=h.y*f,e.damping&&(i.positionPrev.x+=e.damping*m.x*v*f,i.positionPrev.y+=e.damping*m.y*v*f),p=r.cross(a,h)/S*o._torqueDampen*i.inverseInertia*(1-e.angularStiffness),i.constraintImpulse.angle+=p,i.angle+=p)}}},o.postSolveAll=function(e){for(var t=0;t<e.length;t++){var n=e[t],c=n.constraintImpulse;if(!(n.isStatic||0===c.x&&0===c.y&&0===c.angle)){s.set(n,!1);for(var d=0;d<n.parts.length;d++){var u=n.parts[d];i.translate(u.vertices,c),d>0&&(u.position.x+=c.x,u.position.y+=c.y),0!==c.angle&&(i.rotate(u.vertices,c.angle,n.position),l.rotate(u.axes,c.angle),d>0&&r.rotateAbout(u.position,c.angle,n.position,u.position)),a.update(u.bounds,u.vertices,n.velocity)}c.angle*=o._warming,c.x*=o._warming,c.y*=o._warming}}}}()},{"../core/Common":14,"../core/Sleeping":22,"../geometry/Axes":25,"../geometry/Bounds":26,"../geometry/Vector":28,"../geometry/Vertices":29}],13:[function(e,t,n){var o={};t.exports=o;var i=e("../geometry/Vertices"),r=e("../core/Sleeping"),s=e("../core/Mouse"),a=e("../core/Events"),l=e("../collision/Detector"),c=e("./Constraint"),d=e("../body/Composite"),u=e("../core/Common"),p=e("../geometry/Bounds");
-!function(){o.create=function(t,n){var i=(t?t.mouse:null)||(n?n.mouse:null);i||(t&&t.render&&t.render.canvas?i=s.create(t.render.canvas):n&&n.element?i=s.create(n.element):(i=s.create(),u.warn("MouseConstraint.create: options.mouse was undefined, options.element was undefined, may not function as expected")));var r=c.create({label:"Mouse Constraint",pointA:i.position,pointB:{x:0,y:0},length:.01,stiffness:.1,angularStiffness:1,render:{strokeStyle:"#90EE90",lineWidth:3}}),l={type:"mouseConstraint",mouse:i,element:null,body:null,constraint:r,collisionFilter:{category:1,mask:4294967295,group:0}},p=u.extend(l,n);return a.on(t,"beforeUpdate",function(){var n=d.allBodies(t.world);o.update(p,n),e(p)}),p},o.update=function(e,t){var n=e.mouse,o=e.constraint,s=e.body;if(0===n.button){if(o.bodyB)r.set(o.bodyB,!1),o.pointA=n.position;else for(var c=0;c<t.length;c++)if(s=t[c],p.contains(s.bounds,n.position)&&l.canCollide(s.collisionFilter,e.collisionFilter))for(var d=s.parts.length>1?1:0;d<s.parts.length;d++){
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-}var o=function(){for(var t,n=new Array(arguments.length),o=0,i=arguments.length;o<i;o++)n[o]=arguments[o];for(o=0;o<e.length;o+=1){var r=e[o].apply(t,n);"undefined"!=typeof r&&(t=r)}return t};return o._chained=e,o},o.chainPathBefore=function(e,t,n){return o.set(e,t,o.chain(n,o.get(e,t)))},o.chainPathAfter=function(e,t,n){return o.set(e,t,o.chain(o.get(e,t),n))}}()},{}],15:[function(e,t,n){var o={};t.exports=o;var i=e("../body/World"),r=e("./Sleeping"),s=e("../collision/Resolver"),a=e("../render/Render"),l=e("../collision/Pairs"),c=(e("./Metrics"),e("../collision/Grid")),d=e("./Events"),u=e("../body/Composite"),p=e("../constraint/Constraint"),f=e("./Common"),m=e("../body/Body");!function(){o.create=function(e,t){t=f.isElement(e)?t:e,e=f.isElement(e)?e:null,t=t||{},(e||t.render)&&f.warn("Engine.create: engine.render is deprecated (see docs)");var n={positionIterations:6,velocityIterations:4,constraintIterations:2,enableSleeping:!1,events:[],plugin:{},timing:{timestamp:0,timeScale:1},broadphase:{
-controller:c}},o=f.extend(n,t);if(e||o.render){var r={element:e,controller:a};o.render=f.extend(r,o.render)}return o.render&&o.render.controller&&(o.render=o.render.controller.create(o.render)),o.render&&(o.render.engine=o),o.world=t.world||i.create(o.world),o.pairs=l.create(),o.broadphase=o.broadphase.controller.create(o.broadphase),o.metrics=o.metrics||{extended:!1},o},o.update=function(o,i,a){i=i||1e3/60,a=a||1;var c,f=o.world,m=o.timing,v=o.broadphase,y=[];m.timestamp+=i*m.timeScale;var g={timestamp:m.timestamp};d.trigger(o,"beforeUpdate",g);var x=u.allBodies(f),h=u.allConstraints(f);for(o.enableSleeping&&r.update(x,m.timeScale),t(x,f.gravity),n(x,i,m.timeScale,a,f.bounds),p.preSolveAll(x),c=0;c<o.constraintIterations;c++)p.solveAll(h,m.timeScale);p.postSolveAll(x),v.controller?(f.isModified&&v.controller.clear(v),v.controller.update(v,x,o,f.isModified),y=v.pairsList):y=x,f.isModified&&u.setModified(f,!1,!1,!0);var b=v.detector(y,o),w=o.pairs,S=m.timestamp;for(l.update(w,b,S),l.removeOld(w,S),
-o.enableSleeping&&r.afterCollisions(w.list,m.timeScale),w.collisionStart.length>0&&d.trigger(o,"collisionStart",{pairs:w.collisionStart}),s.preSolvePosition(w.list),c=0;c<o.positionIterations;c++)s.solvePosition(w.list,m.timeScale);for(s.postSolvePosition(x),p.preSolveAll(x),c=0;c<o.constraintIterations;c++)p.solveAll(h,m.timeScale);for(p.postSolveAll(x),s.preSolveVelocity(w.list),c=0;c<o.velocityIterations;c++)s.solveVelocity(w.list,m.timeScale);return w.collisionActive.length>0&&d.trigger(o,"collisionActive",{pairs:w.collisionActive}),w.collisionEnd.length>0&&d.trigger(o,"collisionEnd",{pairs:w.collisionEnd}),e(x),d.trigger(o,"afterUpdate",g),o},o.merge=function(e,t){if(f.extend(e,t),t.world){e.world=t.world,o.clear(e);for(var n=u.allBodies(e.world),i=0;i<n.length;i++){var s=n[i];r.set(s,!1),s.id=f.nextId()}}},o.clear=function(e){var t=e.world;l.clear(e.pairs);var n=e.broadphase;if(n.controller){var o=u.allBodies(t);n.controller.clear(n),n.controller.update(n,o,e,!0)}};var e=function(e){
-for(var t=0;t<e.length;t++){var n=e[t];n.force.x=0,n.force.y=0,n.torque=0}},t=function(e,t){var n="undefined"!=typeof t.scale?t.scale:.001;if((0!==t.x||0!==t.y)&&0!==n)for(var o=0;o<e.length;o++){var i=e[o];i.isStatic||i.isSleeping||(i.force.y+=i.mass*t.y*n,i.force.x+=i.mass*t.x*n)}},n=function(e,t,n,o,i){for(var r=0;r<e.length;r++){var s=e[r];s.isStatic||s.isSleeping||m.update(s,t,n,o)}}}()},{"../body/Body":1,"../body/Composite":2,"../body/World":3,"../collision/Grid":6,"../collision/Pairs":8,"../collision/Resolver":10,"../constraint/Constraint":12,"../render/Render":31,"./Common":14,"./Events":16,"./Metrics":18,"./Sleeping":22}],16:[function(e,t,n){var o={};t.exports=o;var i=e("./Common");!function(){o.on=function(e,t,n){for(var o,i=t.split(" "),r=0;r<i.length;r++)o=i[r],e.events=e.events||{},e.events[o]=e.events[o]||[],e.events[o].push(n);return n},o.off=function(e,t,n){if(!t)return void(e.events={});"function"==typeof t&&(n=t,t=i.keys(e.events).join(" "));for(var o=t.split(" "),r=0;r<o.length;r++){
-var s=e.events[o[r]],a=[];if(n&&s)for(var l=0;l<s.length;l++)s[l]!==n&&a.push(s[l]);e.events[o[r]]=a}},o.trigger=function(e,t,n){var o,r,s,a;if(e.events){n||(n={}),o=t.split(" ");for(var l=0;l<o.length;l++)if(r=o[l],s=e.events[r]){a=i.clone(n,!1),a.name=r,a.source=e;for(var c=0;c<s.length;c++)s[c].apply(e,[a])}}}}()},{"./Common":14}],17:[function(e,t,n){var o={};t.exports=o;var i=e("./Plugin"),r=e("./Common");!function(){o.name="matter-js",o.version="0.12.0-alpha",o.uses=[],o.used=[],o.use=function(){i.use(o,Array.prototype.slice.call(arguments))},o.before=function(e,t){return e=e.replace(/^Matter./,""),r.chainPathBefore(o,e,t)},o.after=function(e,t){return e=e.replace(/^Matter./,""),r.chainPathAfter(o,e,t)}}()},{"./Common":14,"./Plugin":20}],18:[function(e,t,n){},{"../body/Composite":2,"./Common":14}],19:[function(e,t,n){var o={};t.exports=o;var i=e("../core/Common");!function(){o.create=function(t){var n={};return t||i.log("Mouse.create: element was undefined, defaulting to document.body","warn"),
+for(n=0;n<e.length;n++)i=e[n],i.isActive&&!i.isSensor&&(s=i.collision,a=s.parentA,l=s.parentB,c=s.normal,p=(i.separation-i.slop)*t,(a.isStatic||l.isStatic)&&(p*=2),a.isStatic||a.isSleeping||(u=o._positionDampen/a.totalContacts,a.positionImpulse.x+=c.x*p*u,a.positionImpulse.y+=c.y*p*u),l.isStatic||l.isSleeping||(u=o._positionDampen/l.totalContacts,l.positionImpulse.x-=c.x*p*u,l.positionImpulse.y-=c.y*p*u))},o.postSolvePosition=function(e){for(var t=0;t<e.length;t++){var n=e[t];if(n.totalContacts=0,0!==n.positionImpulse.x||0!==n.positionImpulse.y){for(var s=0;s<n.parts.length;s++){var l=n.parts[s];i.translate(l.vertices,n.positionImpulse),a.update(l.bounds,l.vertices,n.velocity),l.position.x+=n.positionImpulse.x,l.position.y+=n.positionImpulse.y}n.positionPrev.x+=n.positionImpulse.x,n.positionPrev.y+=n.positionImpulse.y,r.dot(n.positionImpulse,n.velocity)<0?(n.positionImpulse.x=0,n.positionImpulse.y=0):(n.positionImpulse.x*=o._positionWarming,n.positionImpulse.y*=o._positionWarming)}}},o.preSolveVelocity=function(e){
+var t,n,o,i,s,a,l,c,d,u,p,f,m,v,y=r._temp[0],g=r._temp[1];for(t=0;t<e.length;t++)if(o=e[t],o.isActive&&!o.isSensor)for(i=o.activeContacts,s=o.collision,a=s.parentA,l=s.parentB,c=s.normal,d=s.tangent,n=0;n<i.length;n++)u=i[n],p=u.vertex,f=u.normalImpulse,m=u.tangentImpulse,0===f&&0===m||(y.x=c.x*f+d.x*m,y.y=c.y*f+d.y*m,a.isStatic||a.isSleeping||(v=r.sub(p,a.position,g),a.positionPrev.x+=y.x*a.inverseMass,a.positionPrev.y+=y.y*a.inverseMass,a.anglePrev+=r.cross(v,y)*a.inverseInertia),l.isStatic||l.isSleeping||(v=r.sub(p,l.position,g),l.positionPrev.x-=y.x*l.inverseMass,l.positionPrev.y-=y.y*l.inverseMass,l.anglePrev-=r.cross(v,y)*l.inverseInertia))},o.solveVelocity=function(e,t){for(var n=t*t,i=r._temp[0],a=r._temp[1],l=r._temp[2],c=r._temp[3],d=r._temp[4],u=r._temp[5],p=0;p<e.length;p++){var f=e[p];if(f.isActive&&!f.isSensor){var m=f.collision,v=m.parentA,y=m.parentB,g=m.normal,x=m.tangent,h=f.activeContacts,b=1/h.length;v.velocity.x=v.position.x-v.positionPrev.x,v.velocity.y=v.position.y-v.positionPrev.y,
+y.velocity.x=y.position.x-y.positionPrev.x,y.velocity.y=y.position.y-y.positionPrev.y,v.angularVelocity=v.angle-v.anglePrev,y.angularVelocity=y.angle-y.anglePrev;for(var w=0;w<h.length;w++){var S=h[w],C=S.vertex,A=r.sub(C,v.position,a),P=r.sub(C,y.position,l),B=r.add(v.velocity,r.mult(r.perp(A),v.angularVelocity),c),M=r.add(y.velocity,r.mult(r.perp(P),y.angularVelocity),d),k=r.sub(B,M,u),I=r.dot(g,k),T=r.dot(x,k),V=Math.abs(T),_=s.sign(T),R=(1+f.restitution)*I,E=s.clamp(f.separation+I,0,1)*o._frictionNormalMultiplier,L=T,F=1/0;V>f.friction*f.frictionStatic*E*n&&(F=V,L=s.clamp(f.friction*_*n,-F,F));var O=r.cross(A,g),q=r.cross(P,g),W=b/(v.inverseMass+y.inverseMass+v.inverseInertia*O*O+y.inverseInertia*q*q);if(R*=W,L*=W,I<0&&I*I>o._restingThresh*n)S.normalImpulse=0;else{var D=S.normalImpulse;S.normalImpulse=Math.min(S.normalImpulse+R,0),R=S.normalImpulse-D}if(T*T>o._restingThreshTangent*n)S.tangentImpulse=0;else{var N=S.tangentImpulse;S.tangentImpulse=s.clamp(S.tangentImpulse+L,-F,F),L=S.tangentImpulse-N;
+}i.x=g.x*R+x.x*L,i.y=g.y*R+x.y*L,v.isStatic||v.isSleeping||(v.positionPrev.x+=i.x*v.inverseMass,v.positionPrev.y+=i.y*v.inverseMass,v.anglePrev+=r.cross(A,i)*v.inverseInertia),y.isStatic||y.isSleeping||(y.positionPrev.x-=i.x*y.inverseMass,y.positionPrev.y-=i.y*y.inverseMass,y.anglePrev-=r.cross(P,i)*y.inverseInertia)}}}}}()},{"../core/Common":14,"../geometry/Bounds":26,"../geometry/Vector":28,"../geometry/Vertices":29}],11:[function(e,t,n){var o={};t.exports=o;var i=e("../geometry/Vertices"),r=e("../geometry/Vector");!function(){o.collides=function(t,o,s){var a,l,c,d,u=!1;if(s){var p=t.parent,f=o.parent,m=p.speed*p.speed+p.angularSpeed*p.angularSpeed+f.speed*f.speed+f.angularSpeed*f.angularSpeed;u=s&&s.collided&&m<.2,d=s}else d={collided:!1,bodyA:t,bodyB:o};if(s&&u){var v=d.axisBody,y=v===t?o:t,g=[v.axes[s.axisNumber]];if(c=e(v.vertices,y.vertices,g),d.reused=!0,c.overlap<=0)return d.collided=!1,d}else{if(a=e(t.vertices,o.vertices,t.axes),a.overlap<=0)return d.collided=!1,d;if(l=e(o.vertices,t.vertices,o.axes),
+l.overlap<=0)return d.collided=!1,d;a.overlap<l.overlap?(c=a,d.axisBody=t):(c=l,d.axisBody=o),d.axisNumber=c.axisNumber}d.bodyA=t.id<o.id?t:o,d.bodyB=t.id<o.id?o:t,d.collided=!0,d.depth=c.overlap,d.parentA=d.bodyA.parent,d.parentB=d.bodyB.parent,t=d.bodyA,o=d.bodyB,r.dot(c.axis,r.sub(o.position,t.position))<0?d.normal={x:c.axis.x,y:c.axis.y}:d.normal={x:-c.axis.x,y:-c.axis.y},d.tangent=r.perp(d.normal),d.penetration=d.penetration||{},d.penetration.x=d.normal.x*d.depth,d.penetration.y=d.normal.y*d.depth;var x=n(t,o,d.normal),h=[];if(i.contains(t.vertices,x[0])&&h.push(x[0]),i.contains(t.vertices,x[1])&&h.push(x[1]),h.length<2){var b=n(o,t,r.neg(d.normal));i.contains(o.vertices,b[0])&&h.push(b[0]),h.length<2&&i.contains(o.vertices,b[1])&&h.push(b[1])}return h.length<1&&(h=[x[0]]),d.supports=h,d};var e=function(e,n,o){for(var i,s,a=r._temp[0],l=r._temp[1],c={overlap:Number.MAX_VALUE},d=0;d<o.length;d++){if(s=o[d],t(a,e,s),t(l,n,s),i=Math.min(a.max-l.min,l.max-a.min),i<=0)return c.overlap=i,
+c;i<c.overlap&&(c.overlap=i,c.axis=s,c.axisNumber=d)}return c},t=function(e,t,n){for(var o=r.dot(t[0],n),i=o,s=1;s<t.length;s+=1){var a=r.dot(t[s],n);a>i?i=a:a<o&&(o=a)}e.min=o,e.max=i},n=function(e,t,n){for(var o,i,s,a,l=Number.MAX_VALUE,c=r._temp[0],d=t.vertices,u=e.position,p=0;p<d.length;p++)i=d[p],c.x=i.x-u.x,c.y=i.y-u.y,o=-r.dot(n,c),o<l&&(l=o,s=i);var f=s.index-1>=0?s.index-1:d.length-1;i=d[f],c.x=i.x-u.x,c.y=i.y-u.y,l=-r.dot(n,c),a=i;var m=(s.index+1)%d.length;return i=d[m],c.x=i.x-u.x,c.y=i.y-u.y,o=-r.dot(n,c),o<l&&(a=i),[s,a]}}()},{"../geometry/Vector":28,"../geometry/Vertices":29}],12:[function(e,t,n){var o={};t.exports=o;var i=e("../geometry/Vertices"),r=e("../geometry/Vector"),s=e("../core/Sleeping"),a=e("../geometry/Bounds"),l=e("../geometry/Axes"),c=e("../core/Common");!function(){o._warming=.4,o._torqueDampen=1,o._minLength=1e-6,o.create=function(e){var t=e;t.bodyA&&!t.pointA&&(t.pointA={x:0,y:0}),t.bodyB&&!t.pointB&&(t.pointB={x:0,y:0});var n=t.bodyA?r.add(t.bodyA.position,t.pointA):t.pointA,o=t.bodyB?r.add(t.bodyB.position,t.pointB):t.pointB,i=r.magnitude(r.sub(n,o));
+t.length="undefined"!=typeof t.length?t.length:i,t.id=t.id||c.nextId(),t.label=t.label||"Constraint",t.type="constraint",t.stiffness=t.stiffness||(t.length>0?1:.7),t.damping=t.damping||0,t.angularStiffness=t.angularStiffness||0,t.angleA=t.bodyA?t.bodyA.angle:t.angleA,t.angleB=t.bodyB?t.bodyB.angle:t.angleB,t.plugin={};var s={visible:!0,lineWidth:2,strokeStyle:"#ffffff",type:"line",anchors:!0};return 0===t.length&&t.stiffness>.1?(s.type="pin",s.anchors=!1):t.stiffness<.9&&(s.type="spring"),t.render=c.extend(s,t.render),t},o.preSolveAll=function(e){for(var t=0;t<e.length;t+=1){var n=e[t],o=n.constraintImpulse;n.isStatic||0===o.x&&0===o.y&&0===o.angle||(n.position.x+=o.x,n.position.y+=o.y,n.angle+=o.angle)}},o.solveAll=function(e,t){for(var n=0;n<e.length;n+=1){var i=e[n],r=!i.bodyA||i.bodyA&&i.bodyA.isStatic,s=!i.bodyB||i.bodyB&&i.bodyB.isStatic;(r||s)&&o.solve(e[n],t)}for(n=0;n<e.length;n+=1)i=e[n],r=!i.bodyA||i.bodyA&&i.bodyA.isStatic,s=!i.bodyB||i.bodyB&&i.bodyB.isStatic,r||s||o.solve(e[n],t);
+},o.solve=function(e,t){var n=e.bodyA,i=e.bodyB,s=e.pointA,a=e.pointB;if(n||i){n&&!n.isStatic&&(r.rotate(s,n.angle-e.angleA,s),e.angleA=n.angle),i&&!i.isStatic&&(r.rotate(a,i.angle-e.angleB,a),e.angleB=i.angle);var l=s,c=a;if(n&&(l=r.add(n.position,s)),i&&(c=r.add(i.position,a)),l&&c){var d=r.sub(l,c),u=r.magnitude(d);u<o._minLength&&(u=o._minLength);var p,f,m,v,y,g=(u-e.length)/u,x=e.stiffness<1?e.stiffness*t:e.stiffness,h=r.mult(d,g*x),b=(n?n.inverseMass:0)+(i?i.inverseMass:0),w=(n?n.inverseInertia:0)+(i?i.inverseInertia:0),S=b+w;if(e.damping){var C=r.create();m=r.div(d,u),y=r.sub(i&&r.sub(i.position,i.positionPrev)||C,n&&r.sub(n.position,n.positionPrev)||C),v=r.dot(m,y)}n&&!n.isStatic&&(f=n.inverseMass/b,n.constraintImpulse.x-=h.x*f,n.constraintImpulse.y-=h.y*f,n.position.x-=h.x*f,n.position.y-=h.y*f,e.damping&&(n.positionPrev.x-=e.damping*m.x*v*f,n.positionPrev.y-=e.damping*m.y*v*f),p=r.cross(s,h)/S*o._torqueDampen*n.inverseInertia*(1-e.angularStiffness),n.constraintImpulse.angle-=p,
+n.angle-=p),i&&!i.isStatic&&(f=i.inverseMass/b,i.constraintImpulse.x+=h.x*f,i.constraintImpulse.y+=h.y*f,i.position.x+=h.x*f,i.position.y+=h.y*f,e.damping&&(i.positionPrev.x+=e.damping*m.x*v*f,i.positionPrev.y+=e.damping*m.y*v*f),p=r.cross(a,h)/S*o._torqueDampen*i.inverseInertia*(1-e.angularStiffness),i.constraintImpulse.angle+=p,i.angle+=p)}}},o.postSolveAll=function(e){for(var t=0;t<e.length;t++){var n=e[t],c=n.constraintImpulse;if(!(n.isStatic||0===c.x&&0===c.y&&0===c.angle)){s.set(n,!1);for(var d=0;d<n.parts.length;d++){var u=n.parts[d];i.translate(u.vertices,c),d>0&&(u.position.x+=c.x,u.position.y+=c.y),0!==c.angle&&(i.rotate(u.vertices,c.angle,n.position),l.rotate(u.axes,c.angle),d>0&&r.rotateAbout(u.position,c.angle,n.position,u.position)),a.update(u.bounds,u.vertices,n.velocity)}c.angle*=o._warming,c.x*=o._warming,c.y*=o._warming}}}}()},{"../core/Common":14,"../core/Sleeping":22,"../geometry/Axes":25,"../geometry/Bounds":26,"../geometry/Vector":28,"../geometry/Vertices":29}],13:[function(e,t,n){
+var o={};t.exports=o;var i=e("../geometry/Vertices"),r=e("../core/Sleeping"),s=e("../core/Mouse"),a=e("../core/Events"),l=e("../collision/Detector"),c=e("./Constraint"),d=e("../body/Composite"),u=e("../core/Common"),p=e("../geometry/Bounds");!function(){o.create=function(t,n){var i=(t?t.mouse:null)||(n?n.mouse:null);i||(t&&t.render&&t.render.canvas?i=s.create(t.render.canvas):n&&n.element?i=s.create(n.element):(i=s.create(),u.warn("MouseConstraint.create: options.mouse was undefined, options.element was undefined, may not function as expected")));var r=c.create({label:"Mouse Constraint",pointA:i.position,pointB:{x:0,y:0},length:.01,stiffness:.1,angularStiffness:1,render:{strokeStyle:"#90EE90",lineWidth:3}}),l={type:"mouseConstraint",mouse:i,element:null,body:null,constraint:r,collisionFilter:{category:1,mask:4294967295,group:0}},p=u.extend(l,n);return a.on(t,"beforeUpdate",function(){var n=d.allBodies(t.world);o.update(p,n),e(p)}),p},o.update=function(e,t){var n=e.mouse,o=e.constraint,s=e.body;
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+o.log=function(){console&&o.logLevel>0&&o.logLevel<=3&&console.log.apply(console,["matter-js:"].concat(Array.prototype.slice.call(arguments)))},o.info=function(){console&&o.logLevel>0&&o.logLevel<=2&&console.info.apply(console,["matter-js:"].concat(Array.prototype.slice.call(arguments)))},o.warn=function(){console&&o.logLevel>0&&o.logLevel<=3&&console.warn.apply(console,["matter-js:"].concat(Array.prototype.slice.call(arguments)))},o.nextId=function(){return o._nextId++},o.indexOf=function(e,t){if(e.indexOf)return e.indexOf(t);for(var n=0;n<e.length;n++)if(e[n]===t)return n;return-1},o.map=function(e,t){if(e.map)return e.map(t);for(var n=[],o=0;o<e.length;o+=1)n.push(t(e[o]));return n},o.topologicalSort=function(e){var n=[],o=[],i=[];for(var r in e)o[r]||i[r]||t(r,o,i,e,n);return n};var t=function(e,n,o,i,r){var s=i[e]||[];o[e]=!0;for(var a=0;a<s.length;a+=1){var l=s[a];o[l]||n[l]||t(l,n,o,i,r)}o[e]=!1,n[e]=!0,r.push(e)};o.chain=function(){for(var e=[],t=0;t<arguments.length;t+=1){var n=arguments[t];
+n._chained?e.push.apply(e,n._chained):e.push(n)}var o=function(){for(var t,n=new Array(arguments.length),o=0,i=arguments.length;o<i;o++)n[o]=arguments[o];for(o=0;o<e.length;o+=1){var r=e[o].apply(t,n);"undefined"!=typeof r&&(t=r)}return t};return o._chained=e,o},o.chainPathBefore=function(e,t,n){return o.set(e,t,o.chain(n,o.get(e,t)))},o.chainPathAfter=function(e,t,n){return o.set(e,t,o.chain(o.get(e,t),n))}}()},{}],15:[function(e,t,n){var o={};t.exports=o;var i=e("../body/World"),r=e("./Sleeping"),s=e("../collision/Resolver"),a=e("../render/Render"),l=e("../collision/Pairs"),c=(e("./Metrics"),e("../collision/Grid")),d=e("./Events"),u=e("../body/Composite"),p=e("../constraint/Constraint"),f=e("./Common"),m=e("../body/Body");!function(){o.create=function(e,t){t=f.isElement(e)?t:e,e=f.isElement(e)?e:null,t=t||{},(e||t.render)&&f.warn("Engine.create: engine.render is deprecated (see docs)");var n={positionIterations:6,velocityIterations:4,constraintIterations:2,enableSleeping:!1,events:[],
+plugin:{},timing:{timestamp:0,timeScale:1},broadphase:{controller:c}},o=f.extend(n,t);if(e||o.render){var r={element:e,controller:a};o.render=f.extend(r,o.render)}return o.render&&o.render.controller&&(o.render=o.render.controller.create(o.render)),o.render&&(o.render.engine=o),o.world=t.world||i.create(o.world),o.pairs=l.create(),o.broadphase=o.broadphase.controller.create(o.broadphase),o.metrics=o.metrics||{extended:!1},o},o.update=function(o,i,a){i=i||1e3/60,a=a||1;var c,f=o.world,m=o.timing,v=o.broadphase,y=[];m.timestamp+=i*m.timeScale;var g={timestamp:m.timestamp};d.trigger(o,"beforeUpdate",g);var x=u.allBodies(f),h=u.allConstraints(f);for(o.enableSleeping&&r.update(x,m.timeScale),t(x,f.gravity),n(x,i,m.timeScale,a,f.bounds),p.preSolveAll(x),c=0;c<o.constraintIterations;c++)p.solveAll(h,m.timeScale);p.postSolveAll(x),v.controller?(f.isModified&&v.controller.clear(v),v.controller.update(v,x,o,f.isModified),y=v.pairsList):y=x,f.isModified&&u.setModified(f,!1,!1,!0);var b=v.detector(y,o),w=o.pairs,S=m.timestamp;
+for(l.update(w,b,S),l.removeOld(w,S),o.enableSleeping&&r.afterCollisions(w.list,m.timeScale),w.collisionStart.length>0&&d.trigger(o,"collisionStart",{pairs:w.collisionStart}),s.preSolvePosition(w.list),c=0;c<o.positionIterations;c++)s.solvePosition(w.list,m.timeScale);for(s.postSolvePosition(x),p.preSolveAll(x),c=0;c<o.constraintIterations;c++)p.solveAll(h,m.timeScale);for(p.postSolveAll(x),s.preSolveVelocity(w.list),c=0;c<o.velocityIterations;c++)s.solveVelocity(w.list,m.timeScale);return w.collisionActive.length>0&&d.trigger(o,"collisionActive",{pairs:w.collisionActive}),w.collisionEnd.length>0&&d.trigger(o,"collisionEnd",{pairs:w.collisionEnd}),e(x),d.trigger(o,"afterUpdate",g),o},o.merge=function(e,t){if(f.extend(e,t),t.world){e.world=t.world,o.clear(e);for(var n=u.allBodies(e.world),i=0;i<n.length;i++){var s=n[i];r.set(s,!1),s.id=f.nextId()}}},o.clear=function(e){var t=e.world;l.clear(e.pairs);var n=e.broadphase;if(n.controller){var o=u.allBodies(t);n.controller.clear(n),n.controller.update(n,o,e,!0);
+}};var e=function(e){for(var t=0;t<e.length;t++){var n=e[t];n.force.x=0,n.force.y=0,n.torque=0}},t=function(e,t){var n="undefined"!=typeof t.scale?t.scale:.001;if((0!==t.x||0!==t.y)&&0!==n)for(var o=0;o<e.length;o++){var i=e[o];i.isStatic||i.isSleeping||(i.force.y+=i.mass*t.y*n,i.force.x+=i.mass*t.x*n)}},n=function(e,t,n,o,i){for(var r=0;r<e.length;r++){var s=e[r];s.isStatic||s.isSleeping||m.update(s,t,n,o)}}}()},{"../body/Body":1,"../body/Composite":2,"../body/World":3,"../collision/Grid":6,"../collision/Pairs":8,"../collision/Resolver":10,"../constraint/Constraint":12,"../render/Render":31,"./Common":14,"./Events":16,"./Metrics":18,"./Sleeping":22}],16:[function(e,t,n){var o={};t.exports=o;var i=e("./Common");!function(){o.on=function(e,t,n){for(var o,i=t.split(" "),r=0;r<i.length;r++)o=i[r],e.events=e.events||{},e.events[o]=e.events[o]||[],e.events[o].push(n);return n},o.off=function(e,t,n){if(!t)return void(e.events={});"function"==typeof t&&(n=t,t=i.keys(e.events).join(" "));for(var o=t.split(" "),r=0;r<o.length;r++){
+var s=e.events[o[r]],a=[];if(n&&s)for(var l=0;l<s.length;l++)s[l]!==n&&a.push(s[l]);e.events[o[r]]=a}},o.trigger=function(e,t,n){var o,r,s,a;if(e.events){n||(n={}),o=t.split(" ");for(var l=0;l<o.length;l++)if(r=o[l],s=e.events[r]){a=i.clone(n,!1),a.name=r,a.source=e;for(var c=0;c<s.length;c++)s[c].apply(e,[a])}}}}()},{"./Common":14}],17:[function(e,t,n){var o={};t.exports=o;var i=e("./Plugin"),r=e("./Common");!function(){o.name="matter-js",o.version="0.13.0",o.uses=[],o.used=[],o.use=function(){i.use(o,Array.prototype.slice.call(arguments))},o.before=function(e,t){return e=e.replace(/^Matter./,""),r.chainPathBefore(o,e,t)},o.after=function(e,t){return e=e.replace(/^Matter./,""),r.chainPathAfter(o,e,t)}}()},{"./Common":14,"./Plugin":20}],18:[function(e,t,n){},{"../body/Composite":2,"./Common":14}],19:[function(e,t,n){var o={};t.exports=o;var i=e("../core/Common");!function(){o.create=function(t){var n={};return t||i.log("Mouse.create: element was undefined, defaulting to document.body","warn"),
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@@ -54,17 +54,17 @@ i.trigger(e,"afterRender",l),i.trigger(t,"afterRender",l)),i.trigger(e,"afterTic
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 delete a.chamfer}return s.create(r.extend({},l,a))},o.trapezoid=function(e,t,n,o,a,l){l=l||{},a*=.5;var c,d=(1-2*a)*n,u=n*a,p=u+d,f=p+u;c=a<.5?"L 0 0 L "+u+" "+-o+" L "+p+" "+-o+" L "+f+" 0":"L 0 0 L "+p+" "+-o+" L "+f+" 0";var m={label:"Trapezoid Body",position:{x:e,y:t},vertices:i.fromPath(c)};if(l.chamfer){var v=l.chamfer;m.vertices=i.chamfer(m.vertices,v.radius,v.quality,v.qualityMin,v.qualityMax),delete l.chamfer}return s.create(r.extend({},m,l))},o.circle=function(e,t,n,i,s){i=i||{};var a={label:"Circle Body",circleRadius:n};s=s||25;var l=Math.ceil(Math.max(10,Math.min(s,n)));return l%2===1&&(l+=1),o.polygon(e,t,l,n,r.extend({},a,i))},o.polygon=function(e,t,n,a,l){if(l=l||{},n<3)return o.circle(e,t,a,l);for(var c=2*Math.PI/n,d="",u=.5*c,p=0;p<n;p+=1){var f=u+p*c,m=Math.cos(f)*a,v=Math.sin(f)*a;d+="L "+m.toFixed(3)+" "+v.toFixed(3)+" "}var y={label:"Polygon Body",position:{x:e,y:t},vertices:i.fromPath(d)};if(l.chamfer){var g=l.chamfer;y.vertices=i.chamfer(y.vertices,g.radius,g.quality,g.qualityMin,g.qualityMax),
 delete l.chamfer}return s.create(r.extend({},y,l))},o.fromVertices=function(e,t,n,o,d,u,p){var f,m,v,y,g,x,h,b,w;for(o=o||{},m=[],d="undefined"!=typeof d&&d,u="undefined"!=typeof u?u:.01,p="undefined"!=typeof p?p:10,c||r.warn("Bodies.fromVertices: poly-decomp.js required. Could not decompose vertices. Fallback to convex hull."),r.isArray(n[0])||(n=[n]),b=0;b<n.length;b+=1)if(y=n[b],v=i.isConvex(y),v||!c)y=v?i.clockwiseSort(y):i.hull(y),m.push({position:{x:e,y:t},vertices:y});else{var S=y.map(function(e){return[e.x,e.y]});c.makeCCW(S),u!==!1&&c.removeCollinearPoints(S,u);var C=c.quickDecomp(S);for(g=0;g<C.length;g++){var A=C[g],P=A.map(function(e){return{x:e[0],y:e[1]}});p>0&&i.area(P)<p||m.push({position:i.centre(P),vertices:P})}}for(g=0;g<m.length;g++)m[g]=s.create(r.extend(m[g],o));if(d){var B=5;for(g=0;g<m.length;g++){var M=m[g];for(x=g+1;x<m.length;x++){var k=m[x];if(a.overlaps(M.bounds,k.bounds)){var I=M.vertices,T=k.vertices;for(h=0;h<M.vertices.length;h++)for(w=0;w<k.vertices.length;w++){
-var V=l.magnitudeSquared(l.sub(I[(h+1)%I.length],T[w])),R=l.magnitudeSquared(l.sub(I[h],T[(w+1)%T.length]));V<B&&R<B&&(I[h].isInternal=!0,T[w].isInternal=!0)}}}}}return m.length>1?(f=s.create(r.extend({parts:m.slice(0)},o)),s.setPosition(f,{x:e,y:t}),f):m[0]}}()}).call(this,"undefined"!=typeof global?global:"undefined"!=typeof self?self:"undefined"!=typeof window?window:{})},{"../body/Body":1,"../core/Common":14,"../geometry/Bounds":26,"../geometry/Vector":28,"../geometry/Vertices":29}],24:[function(e,t,n){var o={};t.exports=o;var i=e("../body/Composite"),r=e("../constraint/Constraint"),s=e("../core/Common"),a=e("../body/Body"),l=e("./Bodies");!function(){o.stack=function(e,t,n,o,r,s,l){for(var c,d=i.create({label:"Stack"}),u=e,p=t,f=0,m=0;m<o;m++){for(var v=0,y=0;y<n;y++){var g=l(u,p,y,m,c,f);if(g){var x=g.bounds.max.y-g.bounds.min.y,h=g.bounds.max.x-g.bounds.min.x;x>v&&(v=x),a.translate(g,{x:.5*h,y:.5*x}),u=g.bounds.max.x+r,i.addBody(d,g),c=g,f+=1}else u+=r}p+=v+s,u=e}return d},o.chain=function(e,t,n,o,a,l){
+var V=l.magnitudeSquared(l.sub(I[(h+1)%I.length],T[w])),_=l.magnitudeSquared(l.sub(I[h],T[(w+1)%T.length]));V<B&&_<B&&(I[h].isInternal=!0,T[w].isInternal=!0)}}}}}return m.length>1?(f=s.create(r.extend({parts:m.slice(0)},o)),s.setPosition(f,{x:e,y:t}),f):m[0]}}()}).call(this,"undefined"!=typeof global?global:"undefined"!=typeof self?self:"undefined"!=typeof window?window:{})},{"../body/Body":1,"../core/Common":14,"../geometry/Bounds":26,"../geometry/Vector":28,"../geometry/Vertices":29}],24:[function(e,t,n){var o={};t.exports=o;var i=e("../body/Composite"),r=e("../constraint/Constraint"),s=e("../core/Common"),a=e("../body/Body"),l=e("./Bodies");!function(){o.stack=function(e,t,n,o,r,s,l){for(var c,d=i.create({label:"Stack"}),u=e,p=t,f=0,m=0;m<o;m++){for(var v=0,y=0;y<n;y++){var g=l(u,p,y,m,c,f);if(g){var x=g.bounds.max.y-g.bounds.min.y,h=g.bounds.max.x-g.bounds.min.x;x>v&&(v=x),a.translate(g,{x:.5*h,y:.5*x}),u=g.bounds.max.x+r,i.addBody(d,g),c=g,f+=1}else u+=r}p+=v+s,u=e}return d},o.chain=function(e,t,n,o,a,l){
 for(var c=e.bodies,d=1;d<c.length;d++){var u=c[d-1],p=c[d],f=u.bounds.max.y-u.bounds.min.y,m=u.bounds.max.x-u.bounds.min.x,v=p.bounds.max.y-p.bounds.min.y,y=p.bounds.max.x-p.bounds.min.x,g={bodyA:u,pointA:{x:m*t,y:f*n},bodyB:p,pointB:{x:y*o,y:v*a}},x=s.extend(g,l);i.addConstraint(e,r.create(x))}return e.label+=" Chain",e},o.mesh=function(e,t,n,o,a){var l,c,d,u,p,f=e.bodies;for(l=0;l<n;l++){for(c=1;c<t;c++)d=f[c-1+l*t],u=f[c+l*t],i.addConstraint(e,r.create(s.extend({bodyA:d,bodyB:u},a)));if(l>0)for(c=0;c<t;c++)d=f[c+(l-1)*t],u=f[c+l*t],i.addConstraint(e,r.create(s.extend({bodyA:d,bodyB:u},a))),o&&c>0&&(p=f[c-1+(l-1)*t],i.addConstraint(e,r.create(s.extend({bodyA:p,bodyB:u},a)))),o&&c<t-1&&(p=f[c+1+(l-1)*t],i.addConstraint(e,r.create(s.extend({bodyA:p,bodyB:u},a))))}return e.label+=" Mesh",e},o.pyramid=function(e,t,n,i,r,s,l){return o.stack(e,t,n,i,r,s,function(t,o,s,c,d,u){var p=Math.min(i,Math.ceil(n/2)),f=d?d.bounds.max.x-d.bounds.min.x:0;if(!(c>p)){c=p-c;var m=c,v=n-1-c;if(!(s<m||s>v)){
-1===u&&a.translate(d,{x:(s+(n%2===1?1:-1))*f,y:0});var y=d?s*f:0;return l(e+y+s*r,o,s,c,d,u)}}})},o.newtonsCradle=function(e,t,n,o,s){for(var a=i.create({label:"Newtons Cradle"}),c=0;c<n;c++){var d=1.9,u=l.circle(e+c*(o*d),t+s,o,{inertia:1/0,restitution:1,friction:0,frictionAir:1e-4,slop:1}),p=r.create({pointA:{x:e+c*(o*d),y:t},bodyB:u});i.addBody(a,u),i.addConstraint(a,p)}return a},o.car=function(e,t,n,o,s){var c=a.nextGroup(!0),d=20,u=.5*-n+d,p=.5*n-d,f=0,m=i.create({label:"Car"}),v=l.rectangle(e,t,n,o,{collisionFilter:{group:c},chamfer:{radius:.5*o},density:2e-4}),y=l.circle(e+u,t+f,s,{collisionFilter:{group:c},friction:.8}),g=l.circle(e+p,t+f,s,{collisionFilter:{group:c},friction:.8}),x=r.create({bodyB:v,pointB:{x:u,y:f},bodyA:y,stiffness:1,length:0,render:{lineWidth:0}}),h=r.create({bodyB:v,pointB:{x:p,y:f},bodyA:g,stiffness:1,length:0,render:{lineWidth:0}});return i.addBody(m,v),i.addBody(m,y),i.addBody(m,g),i.addConstraint(m,x),i.addConstraint(m,h),m},o.softBody=function(e,t,n,i,r,a,c,d,u,p){
-u=s.extend({inertia:1/0},u),p=s.extend({stiffness:.2},p);var f=o.stack(e,t,n,i,r,a,function(e,t){return l.circle(e,t,d,u)});return o.mesh(f,n,i,c,p),f.label="Soft Body",f}}()},{"../body/Body":1,"../body/Composite":2,"../constraint/Constraint":12,"../core/Common":14,"./Bodies":23}],25:[function(e,t,n){var o={};t.exports=o;var i=e("../geometry/Vector"),r=e("../core/Common");!function(){o.fromVertices=function(e){for(var t={},n=0;n<e.length;n++){var o=(n+1)%e.length,s=i.normalise({x:e[o].y-e[n].y,y:e[n].x-e[o].x}),a=0===s.y?1/0:s.x/s.y;a=a.toFixed(3).toString(),t[a]=s}return r.values(t)},o.rotate=function(e,t){if(0!==t)for(var n=Math.cos(t),o=Math.sin(t),i=0;i<e.length;i++){var r,s=e[i];r=s.x*n-s.y*o,s.y=s.x*o+s.y*n,s.x=r}}}()},{"../core/Common":14,"../geometry/Vector":28}],26:[function(e,t,n){var o={};t.exports=o,function(){o.create=function(e){var t={min:{x:0,y:0},max:{x:0,y:0}};return e&&o.update(t,e),t},o.update=function(e,t,n){e.min.x=1/0,e.max.x=-(1/0),e.min.y=1/0,e.max.y=-(1/0);for(var o=0;o<t.length;o++){
+1===u&&a.translate(d,{x:(s+(n%2===1?1:-1))*f,y:0});var y=d?s*f:0;return l(e+y+s*r,o,s,c,d,u)}}})},o.newtonsCradle=function(e,t,n,o,s){for(var a=i.create({label:"Newtons Cradle"}),c=0;c<n;c++){var d=1.9,u=l.circle(e+c*(o*d),t+s,o,{inertia:1/0,restitution:1,friction:0,frictionAir:1e-4,slop:1}),p=r.create({pointA:{x:e+c*(o*d),y:t},bodyB:u});i.addBody(a,u),i.addConstraint(a,p)}return a},o.car=function(e,t,n,o,s){var c=a.nextGroup(!0),d=20,u=.5*-n+d,p=.5*n-d,f=0,m=i.create({label:"Car"}),v=l.rectangle(e,t,n,o,{collisionFilter:{group:c},chamfer:{radius:.5*o},density:2e-4}),y=l.circle(e+u,t+f,s,{collisionFilter:{group:c},friction:.8}),g=l.circle(e+p,t+f,s,{collisionFilter:{group:c},friction:.8}),x=r.create({bodyB:v,pointB:{x:u,y:f},bodyA:y,stiffness:1,length:0}),h=r.create({bodyB:v,pointB:{x:p,y:f},bodyA:g,stiffness:1,length:0});return i.addBody(m,v),i.addBody(m,y),i.addBody(m,g),i.addConstraint(m,x),i.addConstraint(m,h),m},o.softBody=function(e,t,n,i,r,a,c,d,u,p){u=s.extend({inertia:1/0},u),p=s.extend({
+stiffness:.2,render:{type:"line",anchors:!1}},p);var f=o.stack(e,t,n,i,r,a,function(e,t){return l.circle(e,t,d,u)});return o.mesh(f,n,i,c,p),f.label="Soft Body",f}}()},{"../body/Body":1,"../body/Composite":2,"../constraint/Constraint":12,"../core/Common":14,"./Bodies":23}],25:[function(e,t,n){var o={};t.exports=o;var i=e("../geometry/Vector"),r=e("../core/Common");!function(){o.fromVertices=function(e){for(var t={},n=0;n<e.length;n++){var o=(n+1)%e.length,s=i.normalise({x:e[o].y-e[n].y,y:e[n].x-e[o].x}),a=0===s.y?1/0:s.x/s.y;a=a.toFixed(3).toString(),t[a]=s}return r.values(t)},o.rotate=function(e,t){if(0!==t)for(var n=Math.cos(t),o=Math.sin(t),i=0;i<e.length;i++){var r,s=e[i];r=s.x*n-s.y*o,s.y=s.x*o+s.y*n,s.x=r}}}()},{"../core/Common":14,"../geometry/Vector":28}],26:[function(e,t,n){var o={};t.exports=o,function(){o.create=function(e){var t={min:{x:0,y:0},max:{x:0,y:0}};return e&&o.update(t,e),t},o.update=function(e,t,n){e.min.x=1/0,e.max.x=-(1/0),e.min.y=1/0,e.max.y=-(1/0);for(var o=0;o<t.length;o++){
 var i=t[o];i.x>e.max.x&&(e.max.x=i.x),i.x<e.min.x&&(e.min.x=i.x),i.y>e.max.y&&(e.max.y=i.y),i.y<e.min.y&&(e.min.y=i.y)}n&&(n.x>0?e.max.x+=n.x:e.min.x+=n.x,n.y>0?e.max.y+=n.y:e.min.y+=n.y)},o.contains=function(e,t){return t.x>=e.min.x&&t.x<=e.max.x&&t.y>=e.min.y&&t.y<=e.max.y},o.overlaps=function(e,t){return e.min.x<=t.max.x&&e.max.x>=t.min.x&&e.max.y>=t.min.y&&e.min.y<=t.max.y},o.translate=function(e,t){e.min.x+=t.x,e.max.x+=t.x,e.min.y+=t.y,e.max.y+=t.y},o.shift=function(e,t){var n=e.max.x-e.min.x,o=e.max.y-e.min.y;e.min.x=t.x,e.max.x=t.x+n,e.min.y=t.y,e.max.y=t.y+o}}()},{}],27:[function(e,t,n){var o={};t.exports=o;e("../geometry/Bounds");!function(){o.pathToVertices=function(t,n){var o,i,r,s,a,l,c,d,u,p,f,m,v=[],y=0,g=0,x=0;n=n||15;var h=function(e,t,n){var o=n%2===1&&n>1;if(!u||e!=u.x||t!=u.y){u&&o?(f=u.x,m=u.y):(f=0,m=0);var i={x:f+e,y:m+t};!o&&u||(u=i),v.push(i),g=f+e,x=m+t}},b=function(e){var t=e.pathSegTypeAsLetter.toUpperCase();if("Z"!==t){switch(t){case"M":case"L":case"T":case"C":
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 o||(o={});var s=n.x+((e.x-n.x)*i-(e.y-n.y)*r);return o.y=n.y+((e.x-n.x)*r+(e.y-n.y)*i),o.x=s,o},o.normalise=function(e){var t=o.magnitude(e);return 0===t?{x:0,y:0}:{x:e.x/t,y:e.y/t}},o.dot=function(e,t){return e.x*t.x+e.y*t.y},o.cross=function(e,t){return e.x*t.y-e.y*t.x},o.cross3=function(e,t,n){return(t.x-e.x)*(n.y-e.y)-(t.y-e.y)*(n.x-e.x)},o.add=function(e,t,n){return n||(n={}),n.x=e.x+t.x,n.y=e.y+t.y,n},o.sub=function(e,t,n){return n||(n={}),n.x=e.x-t.x,n.y=e.y-t.y,n},o.mult=function(e,t){return{x:e.x*t,y:e.y*t}},o.div=function(e,t){return{x:e.x/t,y:e.y/t}},o.perp=function(e,t){return t=t===!0?-1:1,{x:t*-e.y,y:t*e.x}},o.neg=function(e){return{x:-e.x,y:-e.y}},o.angle=function(e,t){return Math.atan2(t.y-e.y,t.x-e.x)},o._temp=[o.create(),o.create(),o.create(),o.create(),o.create(),o.create()]}()},{}],29:[function(e,t,n){var o={};t.exports=o;var i=e("../geometry/Vector"),r=e("../core/Common");!function(){o.create=function(e,t){for(var n=[],o=0;o<e.length;o++){var i=e[o],r={x:i.x,y:i.y,index:o,
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-}else a.push(d)}return a},o.clockwiseSort=function(e){var t=o.mean(e);return e.sort(function(e,n){return i.angle(t,e)-i.angle(t,n)}),e},o.isConvex=function(e){var t,n,o,i,r=0,s=e.length;if(s<3)return null;for(t=0;t<s;t++)if(n=(t+1)%s,o=(t+2)%s,i=(e[n].x-e[t].x)*(e[o].y-e[n].y),i-=(e[n].y-e[t].y)*(e[o].x-e[n].x),i<0?r|=1:i>0&&(r|=2),3===r)return!1;return 0!==r||null},o.hull=function(e){var t,n,o=[],r=[];for(e=e.slice(0),e.sort(function(e,t){var n=e.x-t.x;return 0!==n?n:e.y-t.y}),n=0;n<e.length;n++){for(t=e[n];r.length>=2&&i.cross3(r[r.length-2],r[r.length-1],t)<=0;)r.pop();r.push(t)}for(n=e.length-1;n>=0;n--){for(t=e[n];o.length>=2&&i.cross3(o[o.length-2],o[o.length-1],t)<=0;)o.pop();o.push(t)}return o.pop(),r.pop(),o.concat(r)}}()},{"../core/Common":14,"../geometry/Vector":28}],30:[function(e,t,n){var o=t.exports=e("../core/Matter");o.Body=e("../body/Body"),o.Composite=e("../body/Composite"),o.World=e("../body/World"),o.Contact=e("../collision/Contact"),o.Detector=e("../collision/Detector"),
+}else a.push(d)}return a},o.clockwiseSort=function(e){var t=o.mean(e);return e.sort(function(e,n){return i.angle(t,e)-i.angle(t,n)}),e},o.isConvex=function(e){var t,n,o,i,r=0,s=e.length;if(s<3)return null;for(t=0;t<s;t++)if(n=(t+1)%s,o=(t+2)%s,i=(e[n].x-e[t].x)*(e[o].y-e[n].y),i-=(e[n].y-e[t].y)*(e[o].x-e[n].x),i<0?r|=1:i>0&&(r|=2),3===r)return!1;return 0!==r||null},o.hull=function(e){var t,n,o=[],r=[];for(e=e.slice(0),e.sort(function(e,t){var n=e.x-t.x;return 0!==n?n:e.y-t.y}),n=0;n<e.length;n+=1){for(t=e[n];r.length>=2&&i.cross3(r[r.length-2],r[r.length-1],t)<=0;)r.pop();r.push(t)}for(n=e.length-1;n>=0;n-=1){for(t=e[n];o.length>=2&&i.cross3(o[o.length-2],o[o.length-1],t)<=0;)o.pop();o.push(t)}return o.pop(),r.pop(),o.concat(r)}}()},{"../core/Common":14,"../geometry/Vector":28}],30:[function(e,t,n){var o=t.exports=e("../core/Matter");o.Body=e("../body/Body"),o.Composite=e("../body/Composite"),o.World=e("../body/World"),o.Contact=e("../collision/Contact"),o.Detector=e("../collision/Detector"),
 o.Grid=e("../collision/Grid"),o.Pairs=e("../collision/Pairs"),o.Pair=e("../collision/Pair"),o.Query=e("../collision/Query"),o.Resolver=e("../collision/Resolver"),o.SAT=e("../collision/SAT"),o.Constraint=e("../constraint/Constraint"),o.MouseConstraint=e("../constraint/MouseConstraint"),o.Common=e("../core/Common"),o.Engine=e("../core/Engine"),o.Events=e("../core/Events"),o.Mouse=e("../core/Mouse"),o.Runner=e("../core/Runner"),o.Sleeping=e("../core/Sleeping"),o.Plugin=e("../core/Plugin"),o.Bodies=e("../factory/Bodies"),o.Composites=e("../factory/Composites"),o.Axes=e("../geometry/Axes"),o.Bounds=e("../geometry/Bounds"),o.Svg=e("../geometry/Svg"),o.Vector=e("../geometry/Vector"),o.Vertices=e("../geometry/Vertices"),o.Render=e("../render/Render"),o.RenderPixi=e("../render/RenderPixi"),o.World.add=o.Composite.add,o.World.remove=o.Composite.remove,o.World.addComposite=o.Composite.addComposite,o.World.addBody=o.Composite.addBody,o.World.addConstraint=o.Composite.addConstraint,o.World.clear=o.Composite.clear,
 o.Engine.run=o.Runner.run},{"../body/Body":1,"../body/Composite":2,"../body/World":3,"../collision/Contact":4,"../collision/Detector":5,"../collision/Grid":6,"../collision/Pair":7,"../collision/Pairs":8,"../collision/Query":9,"../collision/Resolver":10,"../collision/SAT":11,"../constraint/Constraint":12,"../constraint/MouseConstraint":13,"../core/Common":14,"../core/Engine":15,"../core/Events":16,"../core/Matter":17,"../core/Metrics":18,"../core/Mouse":19,"../core/Plugin":20,"../core/Runner":21,"../core/Sleeping":22,"../factory/Bodies":23,"../factory/Composites":24,"../geometry/Axes":25,"../geometry/Bounds":26,"../geometry/Svg":27,"../geometry/Vector":28,"../geometry/Vertices":29,"../render/Render":31,"../render/RenderPixi":32}],31:[function(e,t,n){var o={};t.exports=o;var i=e("../core/Common"),r=e("../body/Composite"),s=e("../geometry/Bounds"),a=e("../core/Events"),l=e("../collision/Grid"),c=e("../geometry/Vector"),d=e("../core/Mouse");!function(){var e,t;"undefined"!=typeof window&&(e=window.requestAnimationFrame||window.webkitRequestAnimationFrame||window.mozRequestAnimationFrame||window.msRequestAnimationFrame||function(e){
 window.setTimeout(function(){e(i.now())},1e3/60)},t=window.cancelAnimationFrame||window.mozCancelAnimationFrame||window.webkitCancelAnimationFrame||window.msCancelAnimationFrame),o.create=function(e){var t={controller:o,engine:null,element:null,canvas:null,mouse:null,frameRequestId:null,options:{width:800,height:600,pixelRatio:1,background:"#18181d",wireframeBackground:"#0f0f13",hasBounds:!!e.bounds,enabled:!0,wireframes:!0,showSleeping:!0,showDebug:!1,showBroadphase:!1,showBounds:!1,showVelocity:!1,showCollisions:!1,showSeparations:!1,showAxes:!1,showPositions:!1,showAngleIndicator:!1,showIds:!1,showShadows:!1,showVertexNumbers:!1,showConvexHulls:!1,showInternalEdges:!1,showMousePosition:!1}},r=i.extend(t,e);return r.canvas&&(r.canvas.width=r.options.width||r.canvas.width,r.canvas.height=r.options.height||r.canvas.height),r.mouse=e.mouse,r.engine=e.engine,r.canvas=r.canvas||n(r.options.width,r.options.height),r.context=r.canvas.getContext("2d"),r.textures={},r.bounds=r.bounds||{min:{x:0,
@@ -72,7 +72,7 @@ y:0},max:{x:r.canvas.width,y:r.canvas.height}},1!==r.options.pixelRatio&&o.setPi
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 timestamp:n.timing.timestamp};if(a.trigger(e,"beforeRender",b),e.currentBackground!==g&&f(e,g),p.globalCompositeOperation="source-in",p.fillStyle="transparent",p.fillRect(0,0,u.width,u.height),p.globalCompositeOperation="source-over",m.hasBounds){for(t=0;t<v.length;t++){var w=v[t];s.overlaps(w.bounds,e.bounds)&&x.push(w)}for(t=0;t<y.length;t++){var S=y[t],C=S.bodyA,A=S.bodyB,P=S.pointA,B=S.pointB;C&&(P=c.add(C.position,S.pointA)),A&&(B=c.add(A.position,S.pointB)),P&&B&&(s.contains(e.bounds,P)||s.contains(e.bounds,B))&&h.push(S)}o.startViewTransform(e),e.mouse&&(d.setScale(e.mouse,{x:(e.bounds.max.x-e.bounds.min.x)/e.canvas.width,y:(e.bounds.max.y-e.bounds.min.y)/e.canvas.height}),d.setOffset(e.mouse,e.bounds.min))}else h=y,x=v;!m.wireframes||n.enableSleeping&&m.showSleeping?o.bodies(e,x,p):(m.showConvexHulls&&o.bodyConvexHulls(e,x,p),o.bodyWireframes(e,x,p)),m.showBounds&&o.bodyBounds(e,x,p),(m.showAxes||m.showAngleIndicator)&&o.bodyAxes(e,x,p),m.showPositions&&o.bodyPositions(e,x,p),m.showVelocity&&o.bodyVelocity(e,x,p),
 m.showIds&&o.bodyIds(e,x,p),m.showSeparations&&o.separations(e,n.pairs.list,p),m.showCollisions&&o.collisions(e,n.pairs.list,p),m.showVertexNumbers&&o.vertexNumbers(e,x,p),m.showMousePosition&&o.mousePosition(e,e.mouse,p),o.constraints(h,p),m.showBroadphase&&n.broadphase.controller===l&&o.grid(e,n.broadphase,p),m.showDebug&&o.debug(e,p),m.hasBounds&&o.endViewTransform(e),a.trigger(e,"afterRender",b)},o.debug=function(e,t){var n=t,o=e.engine,i=o.world,s=o.metrics,a=e.options,l=(r.allBodies(i),"    ");if(o.timing.timestamp-(e.debugTimestamp||0)>=500){var c="";s.timing&&(c+="fps: "+Math.round(s.timing.fps)+l),e.debugString=c,e.debugTimestamp=o.timing.timestamp}if(e.debugString){n.font="12px Arial",a.wireframes?n.fillStyle="rgba(255,255,255,0.5)":n.fillStyle="rgba(0,0,0,0.5)";for(var d=e.debugString.split("\n"),u=0;u<d.length;u++)n.fillText(d[u],50,50+18*u)}},o.constraints=function(e,t){for(var n=t,o=0;o<e.length;o++){var r=e[o];if(r.render.visible&&r.pointA&&r.pointB){var s,a,l=r.bodyA,d=r.bodyB;
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diff --git a/package.json b/package.json
index c7275f3..08ac0eb 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "matter-js",
-  "version": "0.12.0",
+  "version": "0.13.0",
   "license": "MIT",
   "homepage": "http://brm.io/matter-js/",
   "author": "Liam Brummitt <liam@brm.io> (http://brm.io/)",