diff --git a/build/matter.js b/build/matter.js
index 25efc041..ccb1ef02 100644
--- a/build/matter.js
+++ b/build/matter.js
@@ -5115,7 +5115,7 @@ var Sleeping = {};
                 motion = body.speed * body.speed + body.angularSpeed * body.angularSpeed;
 
             // wake up bodies if they have a force applied
-            if (body.force.x != 0 || body.force.y != 0) {
+            if (body.force.x !== 0 || body.force.y !== 0) {
                 Sleeping.set(body, false);
                 continue;
             }
diff --git a/build/matter.min.js b/build/matter.min.js
index 6562608e..8981a079 100644
--- a/build/matter.min.js
+++ b/build/matter.min.js
@@ -5,4 +5,4 @@
 */
 
 !function(){var a={},b={};!function(){b._inertiaScale=4;var a=1,c=-1,d=1;b.create=function(a){var b={id:o.nextId(),type:"body",label:"Body",angle:0,vertices:A.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},speed:0,angularSpeed:0,velocity:{x:0,y:0},angularVelocity:0,isStatic:!1,isSleeping:!1,motion:0,sleepThreshold:60,density:.001,restitution:0,friction:.1,frictionAir:.01,collisionFilter:{category:1,mask:4294967295,group:0},slop:.05,timeScale:1,render:{visible:!0,sprite:{xScale:1,yScale:1},lineWidth:1.5}},c=o.extend(b,a);return e(c,a),c},b.nextGroup=function(b){return b?c--:a++},b.nextCategory=function(){return d<<=1};var e=function(a,c){b.set(a,{bounds:a.bounds||y.create(a.vertices),positionPrev:a.positionPrev||z.clone(a.position),anglePrev:a.anglePrev||a.angle,vertices:a.vertices,isStatic:a.isStatic,isSleeping:a.isSleeping}),A.rotate(a.vertices,a.angle,a.position),x.rotate(a.axes,a.angle),y.update(a.bounds,a.vertices,a.velocity),b.set(a,{axes:c.axes||a.axes,area:c.area||a.area,mass:c.mass||a.mass,inertia:c.inertia||a.inertia});var d=a.isStatic?"#eeeeee":o.choose(["#556270","#4ECDC4","#C7F464","#FF6B6B","#C44D58"]),e=o.shadeColor(d,-20);a.render.fillStyle=a.render.fillStyle||d,a.render.strokeStyle=a.render.strokeStyle||e};b.set=function(a,c,d){var e;"string"==typeof c&&(e=c,c={},c[e]=d);for(e in c)if(d=c[e],c.hasOwnProperty(e))switch(e){case"isStatic":b.setStatic(a,d);break;case"isSleeping":u.set(a,d);break;case"mass":b.setMass(a,d);break;case"density":b.setDensity(a,d);break;case"inertia":b.setInertia(a,d);break;case"vertices":b.setVertices(a,d);break;case"position":b.setPosition(a,d);break;case"angle":b.setAngle(a,d);break;case"velocity":b.setVelocity(a,d);break;case"angularVelocity":b.setAngularVelocity(a,d);break;default:a[e]=d}},b.setStatic=function(a,b){a.isStatic=b,b&&(a.restitution=0,a.friction=1,a.mass=a.inertia=a.density=1/0,a.inverseMass=a.inverseInertia=0,a.positionPrev.x=a.position.x,a.positionPrev.y=a.position.y,a.anglePrev=a.angle,a.angularVelocity=0,a.speed=0,a.angularSpeed=0,a.motion=0)},b.setMass=function(a,b){a.mass=b,a.inverseMass=1/a.mass,a.density=a.mass/a.area},b.setDensity=function(a,c){b.setMass(a,c*a.area),a.density=c},b.setInertia=function(a,b){a.inertia=b,a.inverseInertia=1/a.inertia},b.setVertices=function(a,c){a.vertices=c[0].body===a?c:A.create(c,a),a.axes=x.fromVertices(a.vertices),a.area=A.area(a.vertices),b.setMass(a,a.density*a.area);var d=A.centre(a.vertices);A.translate(a.vertices,d,-1),b.setInertia(a,b._inertiaScale*A.inertia(a.vertices,a.mass)),A.translate(a.vertices,a.position),y.update(a.bounds,a.vertices,a.velocity)},b.setPosition=function(a,b){var c=z.sub(b,a.position);a.position.x=b.x,a.position.y=b.y,a.positionPrev.x+=c.x,a.positionPrev.y+=c.y,A.translate(a.vertices,c),y.update(a.bounds,a.vertices,a.velocity)},b.setAngle=function(a,b){var c=b-a.angle;a.angle=b,a.anglePrev+=c,A.rotate(a.vertices,c,a.position),x.rotate(a.axes,c),y.update(a.bounds,a.vertices,a.velocity)},b.setVelocity=function(a,b){a.positionPrev.x=a.position.x-b.x,a.positionPrev.y=a.position.y-b.y,a.velocity.x=b.x,a.velocity.y=b.y,a.speed=z.magnitude(a.velocity)},b.setAngularVelocity=function(a,b){a.anglePrev=a.angle-b,a.angularVelocity=b,a.angularSpeed=Math.abs(a.angularVelocity)},b.translate=function(a,c){b.setPosition(a,z.add(a.position,c))},b.rotate=function(a,c){b.setAngle(a,a.angle+c)},b.scale=function(a,c,d,e){A.scale(a.vertices,c,d,e),a.axes=x.fromVertices(a.vertices),a.area=A.area(a.vertices),b.setMass(a,a.density*a.area),A.translate(a.vertices,{x:-a.position.x,y:-a.position.y}),b.setInertia(a,A.inertia(a.vertices,a.mass)),A.translate(a.vertices,{x:a.position.x,y:a.position.y}),y.update(a.bounds,a.vertices,a.velocity)},b.update=function(a,b,c,d){var e=Math.pow(b*c*a.timeScale,2),f=1-a.frictionAir*c*a.timeScale,g=a.position.x-a.positionPrev.x,h=a.position.y-a.positionPrev.y;a.velocity.x=g*f*d+a.force.x/a.mass*e,a.velocity.y=h*f*d+a.force.y/a.mass*e,a.positionPrev.x=a.position.x,a.positionPrev.y=a.position.y,a.position.x+=a.velocity.x,a.position.y+=a.velocity.y,a.angularVelocity=(a.angle-a.anglePrev)*f*d+a.torque/a.inertia*e,a.anglePrev=a.angle,a.angle+=a.angularVelocity,a.speed=z.magnitude(a.velocity),a.angularSpeed=Math.abs(a.angularVelocity),A.translate(a.vertices,a.velocity),0!==a.angularVelocity&&(A.rotate(a.vertices,a.angularVelocity,a.position),x.rotate(a.axes,a.angularVelocity)),y.update(a.bounds,a.vertices,a.velocity)},b.applyForce=function(a,b,c){a.force.x+=c.x,a.force.y+=c.y;var d={x:b.x-a.position.x,y:b.y-a.position.y};a.torque+=(d.x*c.y-d.y*c.x)*a.inverseInertia}}();var c={};!function(){c.create=function(a){return o.extend({id:o.nextId(),type:"composite",parent:null,isModified:!1,bodies:[],constraints:[],composites:[],label:"Composite"},a)},c.setModified=function(a,b,d,e){if(a.isModified=b,d&&a.parent&&c.setModified(a.parent,b,d,e),e)for(var f=0;f<a.composites.length;f++){var g=a.composites[f];c.setModified(g,b,d,e)}},c.add=function(a,b){var d=[].concat(b);q.trigger(a,"beforeAdd",{object:b});for(var e=0;e<d.length;e++){var f=d[e];switch(f.type){case"body":c.addBody(a,f);break;case"constraint":c.addConstraint(a,f);break;case"composite":c.addComposite(a,f);break;case"mouseConstraint":c.addConstraint(a,f.constraint)}}return q.trigger(a,"afterAdd",{object:b}),a},c.remove=function(a,b,d){var e=[].concat(b);q.trigger(a,"beforeRemove",{object:b});for(var f=0;f<e.length;f++){var g=e[f];switch(g.type){case"body":c.removeBody(a,g,d);break;case"constraint":c.removeConstraint(a,g,d);break;case"composite":c.removeComposite(a,g,d);break;case"mouseConstraint":c.removeConstraint(a,g.constraint)}}return q.trigger(a,"afterRemove",{object:b}),a},c.addComposite=function(a,b){return a.composites.push(b),b.parent=a,c.setModified(a,!0,!0,!1),a},c.removeComposite=function(a,b,d){var e=o.indexOf(a.composites,b);if(-1!==e&&(c.removeCompositeAt(a,e),c.setModified(a,!0,!0,!1)),d)for(var f=0;f<a.composites.length;f++)c.removeComposite(a.composites[f],b,!0);return a},c.removeCompositeAt=function(a,b){return a.composites.splice(b,1),c.setModified(a,!0,!0,!1),a},c.addBody=function(a,b){return a.bodies.push(b),c.setModified(a,!0,!0,!1),a},c.removeBody=function(a,b,d){var e=o.indexOf(a.bodies,b);if(-1!==e&&(c.removeBodyAt(a,e),c.setModified(a,!0,!0,!1)),d)for(var f=0;f<a.composites.length;f++)c.removeBody(a.composites[f],b,!0);return a},c.removeBodyAt=function(a,b){return a.bodies.splice(b,1),c.setModified(a,!0,!0,!1),a},c.addConstraint=function(a,b){return a.constraints.push(b),c.setModified(a,!0,!0,!1),a},c.removeConstraint=function(a,b,d){var e=o.indexOf(a.constraints,b);if(-1!==e&&c.removeConstraintAt(a,e),d)for(var f=0;f<a.composites.length;f++)c.removeConstraint(a.composites[f],b,!0);return a},c.removeConstraintAt=function(a,b){return a.constraints.splice(b,1),c.setModified(a,!0,!0,!1),a},c.clear=function(a,b,d){if(d)for(var e=0;e<a.composites.length;e++)c.clear(a.composites[e],b,!0);return b?a.bodies=a.bodies.filter(function(a){return a.isStatic}):a.bodies.length=0,a.constraints.length=0,a.composites.length=0,c.setModified(a,!0,!0,!1),a},c.allBodies=function(a){for(var b=[].concat(a.bodies),d=0;d<a.composites.length;d++)b=b.concat(c.allBodies(a.composites[d]));return b},c.allConstraints=function(a){for(var b=[].concat(a.constraints),d=0;d<a.composites.length;d++)b=b.concat(c.allConstraints(a.composites[d]));return b},c.allComposites=function(a){for(var b=[].concat(a.composites),d=0;d<a.composites.length;d++)b=b.concat(c.allComposites(a.composites[d]));return b},c.get=function(a,b,d){var e,f;switch(d){case"body":e=c.allBodies(a);break;case"constraint":e=c.allConstraints(a);break;case"composite":e=c.allComposites(a).concat(a)}return e?(f=e.filter(function(a){return a.id.toString()===b.toString()}),0===f.length?null:f[0]):null},c.move=function(a,b,d){return c.remove(a,b),c.add(d,b),a},c.rebase=function(a){for(var b=c.allBodies(a).concat(c.allConstraints(a)).concat(c.allComposites(a)),d=0;d<b.length;d++)b[d].id=o.nextId();return c.setModified(a,!0,!0,!1),a},c.translate=function(a,d,e){for(var f=e?c.allBodies(a):a.bodies,g=0;g<f.length;g++)b.translate(f[g],d);return c.setModified(a,!0,!0,!1),a},c.rotate=function(a,d,e,f){for(var g=Math.cos(d),h=Math.sin(d),i=f?c.allBodies(a):a.bodies,j=0;j<i.length;j++){var k=i[j],l=k.position.x-e.x,m=k.position.y-e.y;b.setPosition(k,{x:e.x+(l*g-m*h),y:e.y+(l*h+m*g)}),b.rotate(k,d)}return c.setModified(a,!0,!0,!1),a},c.scale=function(a,d,e,f,g){for(var h=g?c.allBodies(a):a.bodies,i=0;i<h.length;i++){var j=h[i],k=j.position.x-f.x,l=j.position.y-f.y;b.setPosition(j,{x:f.x+k*d,y:f.y+l*e}),b.scale(j,d,e)}return c.setModified(a,!0,!0,!1),a}}();var d={};!function(){d.create=function(a){var b=c.create(),d={label:"World",gravity:{x:0,y:1},bounds:{min:{x:0,y:0},max:{x:800,y:600}}};return o.extend(b,d,a)}}();var e={};!function(){e.create=function(a){return{id:e.id(a),vertex:a,normalImpulse:0,tangentImpulse:0}},e.id=function(a){return a.body.id+"_"+a.index}}();var f={};!function(){f.collisions=function(a,b){for(var c=[],d=b.metrics,e=b.pairs.table,g=0;g<a.length;g++){var i=a[g][0],j=a[g][1];if((!i.isStatic&&!i.isSleeping||!j.isStatic&&!j.isSleeping)&&f.canCollide(i.collisionFilter,j.collisionFilter)&&(d.midphaseTests+=1,y.overlaps(i.bounds,j.bounds))){var k,m=h.id(i,j),n=e[m];k=n&&n.isActive?n.collision:null;var o=l.collides(i,j,k);d.narrowphaseTests+=1,o.reused&&(d.narrowReuseCount+=1),o.collided&&(c.push(o),d.narrowDetections+=1)}}return c},f.bruteForce=function(a,b){for(var c=[],d=b.metrics,e=b.pairs.table,g=0;g<a.length;g++)for(var i=g+1;i<a.length;i++){var j=a[g],k=a[i];if((!j.isStatic&&!j.isSleeping||!k.isStatic&&!k.isSleeping)&&f.canCollide(j.collisionFilter,k.collisionFilter)&&(d.midphaseTests+=1,y.overlaps(j.bounds,k.bounds))){var m,n=h.id(j,k),o=e[n];m=o&&o.isActive?o.collision:null;var p=l.collides(j,k,m);d.narrowphaseTests+=1,p.reused&&(d.narrowReuseCount+=1),p.collided&&(c.push(p),d.narrowDetections+=1)}}return c},f.canCollide=function(a,b){return a.group===b.group&&0!==a.group?a.group>0:0!==(a.mask&b.category)&&0!==(b.mask&a.category)}}();var g={};!function(){g.create=function(a){var b={controller:g,detector:f.collisions,buckets:{},pairs:{},pairsList:[],bucketWidth:48,bucketHeight:48};return o.extend(b,a)},g.update=function(c,f,g,h){var l,m,n,o,p,q=g.world,r=c.buckets,s=g.metrics,t=!1;for(s.broadphaseTests=0,l=0;l<f.length;l++){var 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d=b.bounds,e=Math.floor(d.min.x/a.bucketWidth),f=Math.floor(d.max.x/a.bucketWidth),g=Math.floor(d.min.y/a.bucketHeight),h=Math.floor(d.max.y/a.bucketHeight);return c(e,f,g,h)},c=function(a,b,c,d){return{id:a+","+b+","+c+","+d,startCol:a,endCol:b,startRow:c,endRow:d}},d=function(a,b){return a+","+b},e=function(a,b){var c=a[b]=[];return c},i=function(a,b,c){for(var d=0;d<b.length;d++){var e=b[d];if(!(c.id===e.id||c.isStatic&&e.isStatic)){var f=h.id(c,e),g=a.pairs[f];g?g[2]+=1:a.pairs[f]=[c,e,1]}}b.push(c)},j=function(a,b,c){b.splice(o.indexOf(b,c),1);for(var d=0;d<b.length;d++){var e=b[d],f=h.id(c,e),g=a.pairs[f];g&&(g[2]-=1)}},k=function(a){var b,c,d=[];b=o.keys(a.pairs);for(var e=0;e<b.length;e++)c=a.pairs[b[e]],c[2]>0?d.push(c):delete a.pairs[b[e]];return d}}();var h={};!function(){h.create=function(a,b){var c=a.bodyA,d=a.bodyB,e={id:h.id(c,d),bodyA:c,bodyB:d,contacts:{},activeContacts:[],separation:0,isActive:!0,timeCreated:b,timeUpdated:b,inverseMass:c.inverseMass+d.inverseMass,friction:Math.min(c.friction,d.friction),restitution:Math.max(c.restitution,d.restitution),slop:Math.max(c.slop,d.slop)};return h.update(e,a,b),e},h.update=function(a,b,c){var d=a.contacts,f=b.supports,g=a.activeContacts;if(a.collision=b,a.inverseMass=b.bodyA.inverseMass+b.bodyB.inverseMass,a.friction=Math.min(b.bodyA.friction,b.bodyB.friction),a.restitution=Math.max(b.bodyA.restitution,b.bodyB.restitution),a.slop=Math.max(b.bodyA.slop,b.bodyB.slop),g.length=0,b.collided){for(var i=0;i<f.length;i++){var j=f[i],k=e.id(j),l=d[k];g.push(l?l:d[k]=e.create(j))}a.separation=b.depth,h.setActive(a,!0,c)}else a.isActive===!0&&h.setActive(a,!1,c)},h.setActive=function(a,b,c){b?(a.isActive=!0,a.timeUpdated=c):(a.isActive=!1,a.activeContacts.length=0)},h.id=function(a,b){return a.id<b.id?a.id+"_"+b.id:b.id+"_"+a.id}}();var i={};!function(){var a=1e3;i.create=function(a){return o.extend({table:{},list:[],collisionStart:[],collisionActive:[],collisionEnd:[]},a)},i.update=function(a,b,c){var d,e,f,g,i=a.list,j=a.table,k=a.collisionStart,l=a.collisionEnd,m=a.collisionActive,n=[];for(k.length=0,l.length=0,m.length=0,g=0;g<b.length;g++)d=b[g],d.collided&&(e=h.id(d.bodyA,d.bodyB),n.push(e),f=j[e],f?(f.isActive?m.push(f):k.push(f),h.update(f,d,c)):(f=h.create(d,c),j[e]=f,k.push(f),i.push(f)));for(g=0;g<i.length;g++)f=i[g],f.isActive&&-1===o.indexOf(n,f.id)&&(h.setActive(f,!1,c),l.push(f))},i.removeOld=function(b,c){var d,e,f,g,h=b.list,i=b.table,j=[];for(g=0;g<h.length;g++)d=h[g],e=d.collision,e.bodyA.isSleeping||e.bodyB.isSleeping?d.timeUpdated=c:c-d.timeUpdated>a&&j.push(g);for(g=0;g<j.length;g++)f=j[g]-g,d=h[f],delete i[d.id],h.splice(f,1)},i.clear=function(a){return a.table={},a.list.length=0,a.collisionStart.length=0,a.collisionActive.length=0,a.collisionEnd.length=0,a}}();var j={};!function(){j.ray=function(a,b,c,d){d=d||Number.MIN_VALUE;for(var e=z.angle(b,c),f=z.magnitude(z.sub(b,c)),g=.5*(c.x+b.x),h=.5*(c.y+b.y),i=v.rectangle(g,h,f,d,{angle:e}),j=[],k=0;k<a.length;k++){var m=a[k];if(y.overlaps(m.bounds,i.bounds)){var n=l.collides(m,i);n.collided&&(n.body=n.bodyA=n.bodyB=m,j.push(n))}}return j},j.region=function(a,b,c){for(var d=[],e=0;e<a.length;e++){var f=a[e],g=y.overlaps(f.bounds,b);(g&&!c||!g&&c)&&d.push(f)}return d}}();var k={};!function(){var a=4,b=.2,c=.6;k.solvePosition=function(a,c){var d,e,f,g,h,i,j,k,l;for(d=0;d<a.length;d++)e=a[d],e.isActive&&(f=e.collision,g=f.bodyA,h=f.bodyB,i=f.supports[0],j=f.supportCorrected,k=f.normal,l=z.sub(z.add(h.positionImpulse,i),z.add(g.positionImpulse,j)),e.separation=z.dot(k,l));for(d=0;d<a.length;d++)e=a[d],e.isActive&&(f=e.collision,g=f.bodyA,h=f.bodyB,k=f.normal,positionImpulse=(e.separation*b-e.slop)*c,(g.isStatic||h.isStatic)&&(positionImpulse*=2),g.isStatic||g.isSleeping||(g.positionImpulse.x+=k.x*positionImpulse,g.positionImpulse.y+=k.y*positionImpulse),h.isStatic||h.isSleeping||(h.positionImpulse.x-=k.x*positionImpulse,h.positionImpulse.y-=k.y*positionImpulse))},k.postSolvePosition=function(a){for(var b=0;b<a.length;b++){var d=a[b];(0!==d.positionImpulse.x||0!==d.positionImpulse.y)&&(d.position.x+=d.positionImpulse.x,d.position.y+=d.positionImpulse.y,d.positionPrev.x+=d.positionImpulse.x,d.positionPrev.y+=d.positionImpulse.y,A.translate(d.vertices,d.positionImpulse),y.update(d.bounds,d.vertices,d.velocity),d.positionImpulse.x*=c,d.positionImpulse.y*=c)}},k.preSolveVelocity=function(a){var b,c,d,e,f,g,h,i,j,k,l,m,n,o,p={};for(b=0;b<a.length;b++)if(d=a[b],d.isActive)for(e=d.activeContacts,f=d.collision,g=f.bodyA,h=f.bodyB,i=f.normal,j=f.tangent,c=0;c<e.length;c++)k=e[c],l=k.vertex,m=k.normalImpulse,n=k.tangentImpulse,p.x=i.x*m+j.x*n,p.y=i.y*m+j.y*n,g.isStatic||g.isSleeping||(o=z.sub(l,g.position),g.positionPrev.x+=p.x*g.inverseMass,g.positionPrev.y+=p.y*g.inverseMass,g.anglePrev+=z.cross(o,p)*g.inverseInertia),h.isStatic||h.isSleeping||(o=z.sub(l,h.position),h.positionPrev.x-=p.x*h.inverseMass,h.positionPrev.y-=p.y*h.inverseMass,h.anglePrev-=z.cross(o,p)*h.inverseInertia)},k.solveVelocity=function(b,c){for(var d={},e=c*c,f=0;f<b.length;f++){var g=b[f];if(g.isActive){var h=g.collision,i=h.bodyA,j=h.bodyB,k=h.normal,l=h.tangent,m=g.activeContacts,n=1/m.length;i.velocity.x=i.position.x-i.positionPrev.x,i.velocity.y=i.position.y-i.positionPrev.y,j.velocity.x=j.position.x-j.positionPrev.x,j.velocity.y=j.position.y-j.positionPrev.y,i.angularVelocity=i.angle-i.anglePrev,j.angularVelocity=j.angle-j.anglePrev;for(var p=0;p<m.length;p++){var q=m[p],r=q.vertex,s=z.sub(r,i.position),t=z.sub(r,j.position),u=z.add(i.velocity,z.mult(z.perp(s),i.angularVelocity)),v=z.add(j.velocity,z.mult(z.perp(t),j.angularVelocity)),w=z.sub(u,v),x=z.dot(k,w),y=z.dot(l,w),A=Math.abs(y),B=o.sign(y),C=(1+g.restitution)*x,D=o.clamp(g.separation+x,0,1),E=y;A>D*g.friction*e&&(E=D*g.friction*e*B);var F=z.cross(s,k),G=z.cross(t,k),H=n/(g.inverseMass+i.inverseInertia*F*F+j.inverseInertia*G*G);if(C*=H,E*=H,0>x&&x*x>a*e)q.normalImpulse=0,q.tangentImpulse=0;else{var I=q.normalImpulse;q.normalImpulse=Math.min(q.normalImpulse+C,0),C=q.normalImpulse-I;var J=q.tangentImpulse;q.tangentImpulse=o.clamp(q.tangentImpulse+E,-A,A),E=q.tangentImpulse-J}d.x=k.x*C+l.x*E,d.y=k.y*C+l.y*E,i.isStatic||i.isSleeping||(i.positionPrev.x+=d.x*i.inverseMass,i.positionPrev.y+=d.y*i.inverseMass,i.anglePrev+=z.cross(s,d)*i.inverseInertia),j.isStatic||j.isSleeping||(j.positionPrev.x-=d.x*j.inverseMass,j.positionPrev.y-=d.y*j.inverseMass,j.anglePrev-=z.cross(t,d)*j.inverseInertia)}}}}}();var l={};!function(){l.collides=function(b,d,e){var f,g,h,i,j=e,k=!1;if(j){var l=b.speed*b.speed+b.angularSpeed*b.angularSpeed+d.speed*d.speed+d.angularSpeed*d.angularSpeed;k=j&&j.collided&&.2>l,i=j}else i={collided:!1,bodyA:b,bodyB:d};if(j&&k){var m=[j.bodyA.axes[j.axisNumber]];if(h=a(j.bodyA.vertices,j.bodyB.vertices,m),i.reused=!0,h.overlap<=0)return i.collided=!1,i}else{if(f=a(b.vertices,d.vertices,b.axes),f.overlap<=0)return i.collided=!1,i;if(g=a(d.vertices,b.vertices,d.axes),g.overlap<=0)return i.collided=!1,i;f.overlap<g.overlap?(h=f,i.bodyA=b,i.bodyB=d):(h=g,i.bodyA=d,i.bodyB=b),i.axisNumber=h.axisNumber}i.collided=!0,i.normal=h.axis,i.depth=h.overlap,b=i.bodyA,d=i.bodyB,z.dot(i.normal,z.sub(d.position,b.position))>0&&(i.normal=z.neg(i.normal)),i.tangent=z.perp(i.normal),i.penetration={x:i.normal.x*i.depth,y:i.normal.y*i.depth};var n=c(b,d,i.normal),o=i.supports||[];if(o.length=0,A.contains(b.vertices,n[0])&&o.push(n[0]),A.contains(b.vertices,n[1])&&o.push(n[1]),o.length<2){var p=c(d,b,z.neg(i.normal));A.contains(d.vertices,p[0])&&o.push(p[0]),o.length<2&&A.contains(d.vertices,p[1])&&o.push(p[1])}return o.length<2&&(o=[n[0]]),i.supports=o,i.supportCorrected=z.sub(o[0],i.penetration),i};var a=function(a,c,d){for(var e,f,g={},h={},i={overlap:Number.MAX_VALUE},j=0;j<d.length;j++){if(f=d[j],b(g,a,f),b(h,c,f),e=g.min<h.min?g.max-h.min:h.max-g.min,0>=e)return i.overlap=e,i;e<i.overlap&&(i.overlap=e,i.axis=f,i.axisNumber=j)}return i},b=function(a,b,c){for(var d=z.dot(b[0],c),e=d,f=1;f<b.length;f+=1){var g=z.dot(b[f],c);g>e?e=g:d>g&&(d=g)}a.min=d,a.max=e},c=function(a,b,c){for(var d,e,f=Number.MAX_VALUE,g={x:0,y:0},h=b.vertices,i=a.position,j=h[0],k=h[1],l=0;l<h.length;l++)e=h[l],g.x=e.x-i.x,g.y=e.y-i.y,d=-z.dot(c,g),f>d&&(f=d,j=e);var m=j.index-1>=0?j.index-1:h.length-1;e=h[m],g.x=e.x-i.x,g.y=e.y-i.y,f=-z.dot(c,g),k=e;var n=(j.index+1)%h.length;return e=h[n],g.x=e.x-i.x,g.y=e.y-i.y,d=-z.dot(c,g),f>d&&(k=e),[j,k]}}();var m={};!function(){var a=1e-6,b=.001;m.create=function(b){var c=b;c.bodyA&&!c.pointA&&(c.pointA={x:0,y:0}),c.bodyB&&!c.pointB&&(c.pointB={x:0,y:0});var d=c.bodyA?z.add(c.bodyA.position,c.pointA):c.pointA,e=c.bodyB?z.add(c.bodyB.position,c.pointB):c.pointB,f=z.magnitude(z.sub(d,e));c.length=c.length||f||a;var g={visible:!0,lineWidth:2,strokeStyle:"#666"};return c.render=o.extend(g,c.render),c.id=c.id||o.nextId(),c.label=c.label||"Constraint",c.type="constraint",c.stiffness=c.stiffness||1,c.angularStiffness=c.angularStiffness||0,c.angleA=c.bodyA?c.bodyA.angle:c.angleA,c.angleB=c.bodyB?c.bodyB.angle:c.angleB,c},m.solveAll=function(a,b){for(var c=0;c<a.length;c++)m.solve(a[c],b)},m.solve=function(c,d){var e=c.bodyA,f=c.bodyB,g=c.pointA,h=c.pointB;e&&!e.isStatic&&(c.pointA=z.rotate(g,e.angle-c.angleA),c.angleA=e.angle),f&&!f.isStatic&&(c.pointB=z.rotate(h,f.angle-c.angleB),c.angleB=f.angle);var i=g,j=h;if(e&&(i=z.add(e.position,g)),f&&(j=z.add(f.position,h)),i&&j){var k=z.sub(i,j),l=z.magnitude(k);0===l&&(l=a);var m=(l-c.length)/l,n=z.div(k,l),p=z.mult(k,.5*m*c.stiffness*d*d);if(!(Math.abs(1-l/c.length)<b*d)){var q,r,s,t,v,w,x,y;e&&!e.isStatic?(s={x:i.x-e.position.x+p.x,y:i.y-e.position.y+p.y},e.velocity.x=e.position.x-e.positionPrev.x,e.velocity.y=e.position.y-e.positionPrev.y,e.angularVelocity=e.angle-e.anglePrev,q=z.add(e.velocity,z.mult(z.perp(s),e.angularVelocity)),v=z.dot(s,n),x=e.inverseMass+e.inverseInertia*v*v):(q={x:0,y:0},x=e?e.inverseMass:0),f&&!f.isStatic?(t={x:j.x-f.position.x-p.x,y:j.y-f.position.y-p.y},f.velocity.x=f.position.x-f.positionPrev.x,f.velocity.y=f.position.y-f.positionPrev.y,f.angularVelocity=f.angle-f.anglePrev,r=z.add(f.velocity,z.mult(z.perp(t),f.angularVelocity)),w=z.dot(t,n),y=f.inverseMass+f.inverseInertia*w*w):(r={x:0,y:0},y=f?f.inverseMass:0);var A=z.sub(r,q),B=z.dot(n,A)/(x+y);B>0&&(B=0);var C,D={x:n.x*B,y:n.y*B};e&&!e.isStatic&&(C=z.cross(s,D)*e.inverseInertia*(1-c.angularStiffness),u.set(e,!1),C=o.clamp(C,-.01,.01),e.constraintImpulse.x-=p.x,e.constraintImpulse.y-=p.y,e.constraintImpulse.angle+=C,e.position.x-=p.x,e.position.y-=p.y,e.angle+=C),f&&!f.isStatic&&(C=z.cross(t,D)*f.inverseInertia*(1-c.angularStiffness),u.set(f,!1),C=o.clamp(C,-.01,.01),f.constraintImpulse.x+=p.x,f.constraintImpulse.y+=p.y,f.constraintImpulse.angle-=C,f.position.x+=p.x,f.position.y+=p.y,f.angle-=C)}}},m.postSolveAll=function(a){for(var b=0;b<a.length;b++){var c=a[b],d=c.constraintImpulse;A.translate(c.vertices,d),0!==d.angle&&(A.rotate(c.vertices,d.angle,c.position),x.rotate(c.axes,d.angle),d.angle=0),y.update(c.bounds,c.vertices),d.x=0,d.y=0}}}();var n={};!function(){n.create=function(b,d){var e=(b?b.mouse:null)||(d?d.mouse:null);!e&&b&&b.render&&b.render.canvas?e=s.create(b.render.canvas):(e=s.create(),o.log("MouseConstraint.create: options.mouse was undefined, engine.render.canvas was 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b=a.mouse,c=b.sourceEvents;c.mousemove&&q.trigger(a,"mousemove",{mouse:b}),c.mousedown&&q.trigger(a,"mousedown",{mouse:b}),c.mouseup&&q.trigger(a,"mouseup",{mouse:b}),s.clearSourceEvents(b)}}();var o={};!function(){o._nextId=0,o._seed=0,o.extend=function(a,b){var c,d,e;"boolean"==typeof b?(c=2,e=b):(c=1,e=!0),d=Array.prototype.slice.call(arguments,c);for(var f=0;f<d.length;f++){var g=d[f];if(g)for(var h in g)e&&g[h]&&g[h].constructor===Object?a[h]&&a[h].constructor!==Object?a[h]=g[h]:(a[h]=a[h]||{},o.extend(a[h],e,g[h])):a[h]=g[h]}return a},o.clone=function(a,b){return o.extend({},b,a)},o.keys=function(a){if(Object.keys)return Object.keys(a);var b=[];for(var c in a)b.push(c);return b},o.values=function(a){var b=[];if(Object.keys){for(var c=Object.keys(a),d=0;d<c.length;d++)b.push(a[c[d]]);return b}for(var e in a)b.push(a[e]);return b},o.shadeColor=function(a,b){var c=parseInt(a.slice(1),16),d=Math.round(2.55*b),e=(c>>16)+d,f=(c>>8&255)+d,g=(255&c)+d;return"#"+(16777216+65536*(255>e?1>e?0:e:255)+256*(255>f?1>f?0:f:255)+(255>g?1>g?0:g:255)).toString(16).slice(1)},o.shuffle=function(a){for(var b=a.length-1;b>0;b--){var c=Math.floor(o.random()*(b+1)),d=a[b];a[b]=a[c],a[c]=d}return a},o.choose=function(a){return a[Math.floor(o.random()*a.length)]},o.isElement=function(a){try{return a instanceof HTMLElement}catch(b){return"object"==typeof a&&1===a.nodeType&&"object"==typeof a.style&&"object"==typeof a.ownerDocument}},o.clamp=function(a,b,c){return b>a?b:a>c?c:a},o.sign=function(a){return 0>a?-1:1},o.now=function(){var a=window.performance;return a?(a.now=a.now||a.webkitNow||a.msNow||a.oNow||a.mozNow,+a.now()):+new Date},o.random=function(b,c){return b="undefined"!=typeof b?b:0,c="undefined"!=typeof c?c:1,b+a()*(c-b)},o.colorToNumber=function(a){return 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h.render=h.render.controller.create(h.render),h.world=d.create(h.world),h.pairs=i.create(),h.metrics=h.metrics||r.create(),h.broadphase=h.broadphase.controller.create(h.broadphase),h},p.update=function(a,b,d){d="undefined"!=typeof d?d:1;var e,g=a.world,l=a.timing,n=a.broadphase,o=[];l.timestamp+=b*l.timeScale,l.correction=d;var p={timestamp:a.timing.timestamp};q.trigger(a,"beforeUpdate",p);var s=c.allBodies(g),t=c.allConstraints(g);for(r.reset(a.metrics),a.enableSleeping&&u.update(s,l.timeScale),h(s,g.gravity),j(s,b,l.timeScale,d,g.bounds),e=0;e<a.constraintIterations;e++)m.solveAll(t,l.timeScale);m.postSolveAll(s),n.controller?(g.isModified&&n.controller.clear(n),n.controller.update(n,s,a,g.isModified),o=n.pairsList):o=s;var v=n.detector(o,a),w=a.pairs,x=l.timestamp;for(i.update(w,v,x),i.removeOld(w,x),a.enableSleeping&&u.afterCollisions(w.list,l.timeScale),w.collisionStart.length>0&&q.trigger(a,"collisionStart",{pairs:w.collisionStart}),k.preSolveVelocity(w.list),e=0;e<a.velocityIterations;e++)k.solveVelocity(w.list,l.timeScale);for(e=0;e<a.positionIterations;e++)k.solvePosition(w.list,l.timeScale);return k.postSolvePosition(s),w.collisionActive.length>0&&q.trigger(a,"collisionActive",{pairs:w.collisionActive}),w.collisionEnd.length>0&&q.trigger(a,"collisionEnd",{pairs:w.collisionEnd}),r.update(a.metrics,a),f(s),g.isModified&&c.setModified(g,!1,!1,!0),q.trigger(a,"afterUpdate",p),a},p.render=function(a){var b={timestamp:a.timing.timestamp};q.trigger(a,"beforeRender",b),a.render.controller.world(a),q.trigger(a,"afterRender",b)},p.merge=function(a,b){if(o.extend(a,b),b.world){a.world=b.world,p.clear(a);for(var d=c.allBodies(a.world),e=0;e<d.length;e++){var f=d[e];u.set(f,!1),f.id=o.nextId()}}},p.clear=function(a){var b=a.world;i.clear(a.pairs);var d=a.broadphase;if(d.controller){var e=c.allBodies(b);d.controller.clear(d),d.controller.update(d,e,a,!0)}};var f=function(a){for(var b=0;b<a.length;b++){var c=a[b];c.force.x=0,c.force.y=0,c.torque=0}},h=function(a,b){for(var c=0;c<a.length;c++){var d=a[c];d.isStatic||d.isSleeping||(d.force.y+=d.mass*b.y*.001,d.force.x+=d.mass*b.x*.001)}},j=function(a,c,d,e,f){for(var g=0;g<a.length;g++){var h=a[g];h.isStatic||h.isSleeping||h.bounds.max.x<f.min.x||h.bounds.min.x>f.max.x||h.bounds.max.y<f.min.y||h.bounds.min.y>f.max.y||b.update(h,c,d,e)}}}();var q={};!function(){q.on=function(a,b,c){for(var d,e=b.split(" "),f=0;f<e.length;f++)d=e[f],a.events=a.events||{},a.events[d]=a.events[d]||[],a.events[d].push(c);return c},q.off=function(a,b,c){if(!b)return void(a.events={});"function"==typeof b&&(c=b,b=o.keys(a.events).join(" "));for(var d=b.split(" "),e=0;e<d.length;e++){var 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f=e.bodyA,g=e.bodyB;f?(c.beginPath(),c.moveTo(f.position.x+e.pointA.x,f.position.y+e.pointA.y)):(c.beginPath(),c.moveTo(e.pointA.x,e.pointA.y)),g?c.lineTo(g.position.x+e.pointB.x,g.position.y+e.pointB.y):c.lineTo(e.pointB.x,e.pointB.y),c.lineWidth=e.render.lineWidth,c.strokeStyle=e.render.strokeStyle,c.stroke()}}},B.bodyShadows=function(a,b,c){for(var d=c,e=a.render,f=0;f<b.length;f++){var g=b[f];if(g.render.visible){if(g.circleRadius)d.beginPath(),d.arc(g.position.x,g.position.y,g.circleRadius,0,2*Math.PI),d.closePath();else{d.beginPath(),d.moveTo(g.vertices[0].x,g.vertices[0].y);for(var h=1;h<g.vertices.length;h++)d.lineTo(g.vertices[h].x,g.vertices[h].y);d.closePath()}var i=g.position.x-.5*e.options.width,j=g.position.y-.2*e.options.height,k=Math.abs(i)+Math.abs(j);d.shadowColor="rgba(0,0,0,0.15)",d.shadowOffsetX=.05*i,d.shadowOffsetY=.05*j,d.shadowBlur=1+12*Math.min(1,k/1e3),d.fill(),d.shadowColor=null,d.shadowOffsetX=null,d.shadowOffsetY=null,d.shadowBlur=null}}},B.bodies=function(a,b,c){var e,f=c,g=a.render,h=g.options;for(e=0;e<b.length;e++){var i=b[e];if(i.render.visible)if(i.render.sprite&&i.render.sprite.texture&&!h.wireframes){var j=i.render.sprite,k=d(g,j.texture);h.showSleeping&&i.isSleeping&&(f.globalAlpha=.5),f.translate(i.position.x,i.position.y),f.rotate(i.angle),f.drawImage(k,k.width*-.5*j.xScale,k.height*-.5*j.yScale,k.width*j.xScale,k.height*j.yScale),f.rotate(-i.angle),f.translate(-i.position.x,-i.position.y),h.showSleeping&&i.isSleeping&&(f.globalAlpha=1)}else{if(i.circleRadius)f.beginPath(),f.arc(i.position.x,i.position.y,i.circleRadius,0,2*Math.PI);else{f.beginPath(),f.moveTo(i.vertices[0].x,i.vertices[0].y);for(var l=1;l<i.vertices.length;l++)f.lineTo(i.vertices[l].x,i.vertices[l].y);f.closePath()}h.wireframes?(f.lineWidth=1,f.strokeStyle="#bbb",h.showSleeping&&i.isSleeping&&(f.strokeStyle="rgba(255,255,255,0.2)"),f.stroke()):(f.fillStyle=h.showSleeping&&i.isSleeping?o.shadeColor(i.render.fillStyle,50):i.render.fillStyle,f.lineWidth=i.render.lineWidth,f.strokeStyle=i.render.strokeStyle,f.fill(),f.stroke())}}},B.bodyWireframes=function(a,b,c){var d,e,f=c;for(f.beginPath(),d=0;d<b.length;d++){var g=b[d];if(g.render.visible){for(f.moveTo(g.vertices[0].x,g.vertices[0].y),e=1;e<g.vertices.length;e++)f.lineTo(g.vertices[e].x,g.vertices[e].y);f.lineTo(g.vertices[0].x,g.vertices[0].y)}}f.lineWidth=1,f.strokeStyle="#bbb",f.stroke()},B.bodyBounds=function(a,b,c){var d=c,e=a.render,f=e.options;d.beginPath();for(var g=0;g<b.length;g++){var h=b[g];h.render.visible&&d.rect(h.bounds.min.x,h.bounds.min.y,h.bounds.max.x-h.bounds.min.x,h.bounds.max.y-h.bounds.min.y)}d.strokeStyle=f.wireframes?"rgba(255,255,255,0.08)":"rgba(0,0,0,0.1)",d.lineWidth=1,d.stroke()},B.bodyAxes=function(a,b,c){var d,e,f=c,g=a.render,h=g.options;for(f.beginPath(),d=0;d<b.length;d++){var i=b[d];if(i.render.visible)if(h.showAxes)for(e=0;e<i.axes.length;e++){var j=i.axes[e];f.moveTo(i.position.x,i.position.y),f.lineTo(i.position.x+20*j.x,i.position.y+20*j.y)}else f.moveTo(i.position.x,i.position.y),f.lineTo((i.vertices[0].x+i.vertices[i.vertices.length-1].x)/2,(i.vertices[0].y+i.vertices[i.vertices.length-1].y)/2)}f.strokeStyle=h.wireframes?"indianred":"rgba(0,0,0,0.3)",f.lineWidth=1,f.stroke()},B.bodyPositions=function(a,b,c){var d,e,f=c,g=a.render,h=g.options;for(f.beginPath(),e=0;e<b.length;e++)d=b[e],d.render.visible&&(f.arc(d.position.x,d.position.y,3,0,2*Math.PI,!1),f.closePath());for(f.fillStyle=h.wireframes?"indianred":"rgba(0,0,0,0.5)",f.fill(),f.beginPath(),e=0;e<b.length;e++)d=b[e],d.render.visible&&(f.arc(d.positionPrev.x,d.positionPrev.y,2,0,2*Math.PI,!1),f.closePath());f.fillStyle="rgba(255,165,0,0.8)",f.fill()},B.bodyVelocity=function(a,b,c){var d=c;d.beginPath();for(var e=0;e<b.length;e++){var f=b[e];f.render.visible&&(d.moveTo(f.position.x,f.position.y),d.lineTo(f.position.x+2*(f.position.x-f.positionPrev.x),f.position.y+2*(f.position.y-f.positionPrev.y)))}d.lineWidth=3,d.strokeStyle="cornflowerblue",d.stroke()},B.bodyIds=function(a,b,c){for(var d=c,e=0;e<b.length;e++){var f=b[e];f.render.visible&&(d.font="12px Arial",d.fillStyle="rgba(255,255,255,0.5)",d.fillText(f.id,f.position.x+10,f.position.y-10))}},B.collisions=function(a,b,c){var d,e,f,g,h=c,i=a.render.options;for(h.beginPath(),f=0;f<b.length;f++)for(d=b[f],e=d.collision,g=0;g<d.activeContacts.length;g++){var j=d.activeContacts[g],k=j.vertex;h.rect(k.x-1.5,k.y-1.5,3.5,3.5)}for(h.fillStyle=i.wireframes?"rgba(255,255,255,0.7)":"orange",h.fill(),h.beginPath(),f=0;f<b.length;f++)if(d=b[f],e=d.collision,d.activeContacts.length>0){var l=d.activeContacts[0].vertex.x,m=d.activeContacts[0].vertex.y;2===d.activeContacts.length&&(l=(d.activeContacts[0].vertex.x+d.activeContacts[1].vertex.x)/2,m=(d.activeContacts[0].vertex.y+d.activeContacts[1].vertex.y)/2),h.moveTo(l-8*e.normal.x,m-8*e.normal.y),h.lineTo(l,m)}h.strokeStyle=i.wireframes?"rgba(255,165,0,0.7)":"orange",h.lineWidth=1,h.stroke()},B.grid=function(a,b,c){var d=c,e=a.render.options;d.strokeStyle=e.wireframes?"rgba(255,180,0,0.1)":"rgba(255,180,0,0.5)",d.beginPath();for(var f=o.keys(b.buckets),g=0;g<f.length;g++){var h=f[g];if(!(b.buckets[h].length<2)){var i=h.split(",");d.rect(.5+parseInt(i[0],10)*b.bucketWidth,.5+parseInt(i[1],10)*b.bucketHeight,b.bucketWidth,b.bucketHeight)}}d.lineWidth=1,d.stroke()},B.inspector=function(a,b){var c,d=a.engine,e=a.selected,f=d.render,g=f.options;if(g.hasBounds){var h=f.bounds.max.x-f.bounds.min.x,i=f.bounds.max.y-f.bounds.min.y,j=h/f.options.width,k=i/f.options.height;b.scale(1/j,1/k),b.translate(-f.bounds.min.x,-f.bounds.min.y)}for(var l=0;l<e.length;l++){var m=e[l].data;switch(b.translate(.5,.5),b.lineWidth=1,b.strokeStyle="rgba(255,165,0,0.9)",b.setLineDash([1,2]),m.type){case"body":c=m.bounds,b.beginPath(),b.rect(Math.floor(c.min.x-3),Math.floor(c.min.y-3),Math.floor(c.max.x-c.min.x+6),Math.floor(c.max.y-c.min.y+6)),b.closePath(),b.stroke();break;case"constraint":var n=m.pointA;m.bodyA&&(n=m.pointB),b.beginPath(),b.arc(n.x,n.y,10,0,2*Math.PI),b.closePath(),b.stroke()}b.setLineDash([0]),b.translate(-.5,-.5)}null!==a.selectStart&&(b.translate(.5,.5),b.lineWidth=1,b.strokeStyle="rgba(255,165,0,0.6)",b.fillStyle="rgba(255,165,0,0.1)",c=a.selectBounds,b.beginPath(),b.rect(Math.floor(c.min.x),Math.floor(c.min.y),Math.floor(c.max.x-c.min.x),Math.floor(c.max.y-c.min.y)),b.closePath(),b.stroke(),b.fill(),b.translate(-.5,-.5)),g.hasBounds&&b.setTransform(1,0,0,1,0,0)};var a=function(a,b){var c=document.createElement("canvas");return c.width=a,c.height=b,c.oncontextmenu=function(){return!1},c.onselectstart=function(){return!1},c},b=function(a){var b=a.getContext("2d"),c=window.devicePixelRatio||1,d=b.webkitBackingStorePixelRatio||b.mozBackingStorePixelRatio||b.msBackingStorePixelRatio||b.oBackingStorePixelRatio||b.backingStorePixelRatio||1;return c/d},d=function(a,b){var c=a.textures[b];return c?c:(c=a.textures[b]=new Image,c.src=b,c)},e=function(a,b){var c=b;/(jpg|gif|png)$/.test(b)&&(c="url("+b+")"),a.canvas.style.background=c,a.canvas.style.backgroundSize="contain",a.currentBackground=b}}();var C={};!function(){C.create=function(a){var b={controller:C,element:null,canvas:null,options:{width:800,height:600,background:"#fafafa",wireframeBackground:"#222",hasBounds:!1,enabled:!0,wireframes:!0,showSleeping:!0,showDebug:!1,showBroadphase:!1,showBounds:!1,showVelocity:!1,showCollisions:!1,showAxes:!1,showPositions:!1,showAngleIndicator:!1,showIds:!1,showShadows:!1}},c=o.extend(b,a),d=!c.options.wireframes&&"transparent"===c.options.background;return c.context=new PIXI.WebGLRenderer(c.options.width,c.options.height,c.canvas,d,!0),c.canvas=c.context.view,c.container=new PIXI.DisplayObjectContainer,c.stage=new PIXI.Stage,c.stage.addChild(c.container),c.bounds=c.bounds||{min:{x:0,y:0},max:{x:c.options.width,y:c.options.height}},c.textures={},c.sprites={},c.primitives={},c.spriteBatch=new PIXI.SpriteBatch,c.container.addChild(c.spriteBatch),o.isElement(c.element)?c.element.appendChild(c.canvas):o.log('No "render.element" passed, "render.canvas" was not inserted into document.',"warn"),c.canvas.oncontextmenu=function(){return!1},c.canvas.onselectstart=function(){return!1},c},C.clear=function(a){for(var b=a.container,c=a.spriteBatch;b.children[0];)b.removeChild(b.children[0]);for(;c.children[0];)c.removeChild(c.children[0]);var d=a.sprites["bg-0"];a.textures={},a.sprites={},a.primitives={},a.sprites["bg-0"]=d,d&&c.addChildAt(d,0),a.container.addChild(a.spriteBatch),a.currentBackground=null,b.scale.set(1,1),b.position.set(0,0)},C.setBackground=function(a,b){if(a.currentBackground!==b){var c=b.indexOf&&-1!==b.indexOf("#"),e=a.sprites["bg-0"];if(c){var f=o.colorToNumber(b);a.stage.setBackgroundColor(f),e&&a.spriteBatch.removeChild(e)}else if(!e){var g=d(a,b);e=a.sprites["bg-0"]=new PIXI.Sprite(g),e.position.x=0,e.position.y=0,a.spriteBatch.addChildAt(e,0)}a.currentBackground=b}},C.world=function(a){var b,d=a.render,e=a.world,f=d.context,g=d.stage,h=d.container,i=d.options,j=c.allBodies(e),k=c.allConstraints(e),l=[];i.wireframes?C.setBackground(d,i.wireframeBackground):C.setBackground(d,i.background);var m=d.bounds.max.x-d.bounds.min.x,n=d.bounds.max.y-d.bounds.min.y,o=m/d.options.width,p=n/d.options.height;if(i.hasBounds){for(b=0;b<j.length;b++){var q=j[b];q.render.sprite.visible=y.overlaps(q.bounds,d.bounds)}for(b=0;b<k.length;b++){var r=k[b],s=r.bodyA,t=r.bodyB,u=r.pointA,v=r.pointB;s&&(u=z.add(s.position,r.pointA)),t&&(v=z.add(t.position,r.pointB)),u&&v&&(y.contains(d.bounds,u)||y.contains(d.bounds,v))&&l.push(r)}h.scale.set(1/o,1/p),h.position.set(-d.bounds.min.x*(1/o),-d.bounds.min.y*(1/p))}else l=k;for(b=0;b<j.length;b++)C.body(a,j[b]);for(b=0;b<l.length;b++)C.constraint(a,l[b]);f.render(g)},C.constraint=function(a,b){var c=a.render,d=b.bodyA,e=b.bodyB,f=b.pointA,g=b.pointB,h=c.container,i=b.render,j="c-"+b.id,k=c.primitives[j];return k||(k=c.primitives[j]=new PIXI.Graphics),i.visible&&b.pointA&&b.pointB?(-1===o.indexOf(h.children,k)&&h.addChild(k),k.clear(),k.beginFill(0,0),k.lineStyle(i.lineWidth,o.colorToNumber(i.strokeStyle),1),d?k.moveTo(d.position.x+f.x,d.position.y+f.y):k.moveTo(f.x,f.y),e?k.lineTo(e.position.x+g.x,e.position.y+g.y):k.lineTo(g.x,g.y),void k.endFill()):void k.clear()},C.body=function(c,d){var e=c.render,f=d.render;if(f.visible)if(f.sprite&&f.sprite.texture){var g="b-"+d.id,h=e.sprites[g],i=e.spriteBatch;h||(h=e.sprites[g]=a(e,d)),-1===o.indexOf(i.children,h)&&i.addChild(h),h.position.x=d.position.x,h.position.y=d.position.y,h.rotation=d.angle,h.scale.x=f.sprite.xScale||1,h.scale.y=f.sprite.yScale||1}else{var j="b-"+d.id,k=e.primitives[j],l=e.container;k||(k=e.primitives[j]=b(e,d),k.initialAngle=d.angle),-1===o.indexOf(l.children,k)&&l.addChild(k),k.position.x=d.position.x,k.position.y=d.position.y,k.rotation=d.angle-k.initialAngle}};var a=function(a,b){var c=b.render,e=c.sprite.texture,f=d(a,e),g=new PIXI.Sprite(f);return g.anchor.x=.5,g.anchor.y=.5,g},b=function(a,b){var c=b.render,d=a.options,e=new PIXI.Graphics;e.clear(),d.wireframes?(e.beginFill(0,0),e.lineStyle(1,o.colorToNumber("#bbb"),1)):(e.beginFill(o.colorToNumber(c.fillStyle),1),e.lineStyle(b.render.lineWidth,o.colorToNumber(c.strokeStyle),1)),e.moveTo(b.vertices[0].x-b.position.x,b.vertices[0].y-b.position.y);for(var f=1;f<b.vertices.length;f++)e.lineTo(b.vertices[f].x-b.position.x,b.vertices[f].y-b.position.y);return e.lineTo(b.vertices[0].x-b.position.x,b.vertices[0].y-b.position.y),e.endFill(),(d.showAngleIndicator||d.showAxes)&&(e.beginFill(0,0),d.wireframes?e.lineStyle(1,o.colorToNumber("#CD5C5C"),1):e.lineStyle(1,o.colorToNumber(b.render.strokeStyle)),e.moveTo(0,0),e.lineTo((b.vertices[0].x+b.vertices[b.vertices.length-1].x)/2-b.position.x,(b.vertices[0].y+b.vertices[b.vertices.length-1].y)/2-b.position.y),e.endFill()),e},d=function(a,b){var c=a.textures[b];return c||(c=a.textures[b]=PIXI.Texture.fromImage(b)),c}}(),d.add=c.add,d.remove=c.remove,d.addComposite=c.addComposite,d.addBody=c.addBody,d.addConstraint=c.addConstraint,d.clear=c.clear,p.run=t.run,a.Body=b,a.Composite=c,a.World=d,a.Contact=e,a.Detector=f,a.Grid=g,a.Pairs=i,a.Pair=h,a.Resolver=k,a.SAT=l,a.Constraint=m,a.MouseConstraint=n,a.Common=o,a.Engine=p,a.Metrics=r,a.Mouse=s,a.Sleeping=u,a.Bodies=v,a.Composites=w,a.Axes=x,a.Bounds=y,a.Vector=z,a.Vertices=A,a.Render=B,a.RenderPixi=C,a.Events=q,a.Query=j,a.Runner=t,"undefined"!=typeof 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f=e.bodyA,g=e.bodyB;f?(c.beginPath(),c.moveTo(f.position.x+e.pointA.x,f.position.y+e.pointA.y)):(c.beginPath(),c.moveTo(e.pointA.x,e.pointA.y)),g?c.lineTo(g.position.x+e.pointB.x,g.position.y+e.pointB.y):c.lineTo(e.pointB.x,e.pointB.y),c.lineWidth=e.render.lineWidth,c.strokeStyle=e.render.strokeStyle,c.stroke()}}},B.bodyShadows=function(a,b,c){for(var d=c,e=a.render,f=0;f<b.length;f++){var g=b[f];if(g.render.visible){if(g.circleRadius)d.beginPath(),d.arc(g.position.x,g.position.y,g.circleRadius,0,2*Math.PI),d.closePath();else{d.beginPath(),d.moveTo(g.vertices[0].x,g.vertices[0].y);for(var h=1;h<g.vertices.length;h++)d.lineTo(g.vertices[h].x,g.vertices[h].y);d.closePath()}var i=g.position.x-.5*e.options.width,j=g.position.y-.2*e.options.height,k=Math.abs(i)+Math.abs(j);d.shadowColor="rgba(0,0,0,0.15)",d.shadowOffsetX=.05*i,d.shadowOffsetY=.05*j,d.shadowBlur=1+12*Math.min(1,k/1e3),d.fill(),d.shadowColor=null,d.shadowOffsetX=null,d.shadowOffsetY=null,d.shadowBlur=null}}},B.bodies=function(a,b,c){var e,f=c,g=a.render,h=g.options;for(e=0;e<b.length;e++){var i=b[e];if(i.render.visible)if(i.render.sprite&&i.render.sprite.texture&&!h.wireframes){var j=i.render.sprite,k=d(g,j.texture);h.showSleeping&&i.isSleeping&&(f.globalAlpha=.5),f.translate(i.position.x,i.position.y),f.rotate(i.angle),f.drawImage(k,k.width*-.5*j.xScale,k.height*-.5*j.yScale,k.width*j.xScale,k.height*j.yScale),f.rotate(-i.angle),f.translate(-i.position.x,-i.position.y),h.showSleeping&&i.isSleeping&&(f.globalAlpha=1)}else{if(i.circleRadius)f.beginPath(),f.arc(i.position.x,i.position.y,i.circleRadius,0,2*Math.PI);else{f.beginPath(),f.moveTo(i.vertices[0].x,i.vertices[0].y);for(var l=1;l<i.vertices.length;l++)f.lineTo(i.vertices[l].x,i.vertices[l].y);f.closePath()}h.wireframes?(f.lineWidth=1,f.strokeStyle="#bbb",h.showSleeping&&i.isSleeping&&(f.strokeStyle="rgba(255,255,255,0.2)"),f.stroke()):(f.fillStyle=h.showSleeping&&i.isSleeping?o.shadeColor(i.render.fillStyle,50):i.render.fillStyle,f.lineWidth=i.render.lineWidth,f.strokeStyle=i.render.strokeStyle,f.fill(),f.stroke())}}},B.bodyWireframes=function(a,b,c){var d,e,f=c;for(f.beginPath(),d=0;d<b.length;d++){var g=b[d];if(g.render.visible){for(f.moveTo(g.vertices[0].x,g.vertices[0].y),e=1;e<g.vertices.length;e++)f.lineTo(g.vertices[e].x,g.vertices[e].y);f.lineTo(g.vertices[0].x,g.vertices[0].y)}}f.lineWidth=1,f.strokeStyle="#bbb",f.stroke()},B.bodyBounds=function(a,b,c){var d=c,e=a.render,f=e.options;d.beginPath();for(var g=0;g<b.length;g++){var h=b[g];h.render.visible&&d.rect(h.bounds.min.x,h.bounds.min.y,h.bounds.max.x-h.bounds.min.x,h.bounds.max.y-h.bounds.min.y)}d.strokeStyle=f.wireframes?"rgba(255,255,255,0.08)":"rgba(0,0,0,0.1)",d.lineWidth=1,d.stroke()},B.bodyAxes=function(a,b,c){var d,e,f=c,g=a.render,h=g.options;for(f.beginPath(),d=0;d<b.length;d++){var i=b[d];if(i.render.visible)if(h.showAxes)for(e=0;e<i.axes.length;e++){var j=i.axes[e];f.moveTo(i.position.x,i.position.y),f.lineTo(i.position.x+20*j.x,i.position.y+20*j.y)}else f.moveTo(i.position.x,i.position.y),f.lineTo((i.vertices[0].x+i.vertices[i.vertices.length-1].x)/2,(i.vertices[0].y+i.vertices[i.vertices.length-1].y)/2)}f.strokeStyle=h.wireframes?"indianred":"rgba(0,0,0,0.3)",f.lineWidth=1,f.stroke()},B.bodyPositions=function(a,b,c){var d,e,f=c,g=a.render,h=g.options;for(f.beginPath(),e=0;e<b.length;e++)d=b[e],d.render.visible&&(f.arc(d.position.x,d.position.y,3,0,2*Math.PI,!1),f.closePath());for(f.fillStyle=h.wireframes?"indianred":"rgba(0,0,0,0.5)",f.fill(),f.beginPath(),e=0;e<b.length;e++)d=b[e],d.render.visible&&(f.arc(d.positionPrev.x,d.positionPrev.y,2,0,2*Math.PI,!1),f.closePath());f.fillStyle="rgba(255,165,0,0.8)",f.fill()},B.bodyVelocity=function(a,b,c){var d=c;d.beginPath();for(var e=0;e<b.length;e++){var f=b[e];f.render.visible&&(d.moveTo(f.position.x,f.position.y),d.lineTo(f.position.x+2*(f.position.x-f.positionPrev.x),f.position.y+2*(f.position.y-f.positionPrev.y)))}d.lineWidth=3,d.strokeStyle="cornflowerblue",d.stroke()},B.bodyIds=function(a,b,c){for(var d=c,e=0;e<b.length;e++){var f=b[e];f.render.visible&&(d.font="12px Arial",d.fillStyle="rgba(255,255,255,0.5)",d.fillText(f.id,f.position.x+10,f.position.y-10))}},B.collisions=function(a,b,c){var d,e,f,g,h=c,i=a.render.options;for(h.beginPath(),f=0;f<b.length;f++)for(d=b[f],e=d.collision,g=0;g<d.activeContacts.length;g++){var j=d.activeContacts[g],k=j.vertex;h.rect(k.x-1.5,k.y-1.5,3.5,3.5)}for(h.fillStyle=i.wireframes?"rgba(255,255,255,0.7)":"orange",h.fill(),h.beginPath(),f=0;f<b.length;f++)if(d=b[f],e=d.collision,d.activeContacts.length>0){var l=d.activeContacts[0].vertex.x,m=d.activeContacts[0].vertex.y;2===d.activeContacts.length&&(l=(d.activeContacts[0].vertex.x+d.activeContacts[1].vertex.x)/2,m=(d.activeContacts[0].vertex.y+d.activeContacts[1].vertex.y)/2),h.moveTo(l-8*e.normal.x,m-8*e.normal.y),h.lineTo(l,m)}h.strokeStyle=i.wireframes?"rgba(255,165,0,0.7)":"orange",h.lineWidth=1,h.stroke()},B.grid=function(a,b,c){var d=c,e=a.render.options;d.strokeStyle=e.wireframes?"rgba(255,180,0,0.1)":"rgba(255,180,0,0.5)",d.beginPath();for(var f=o.keys(b.buckets),g=0;g<f.length;g++){var h=f[g];if(!(b.buckets[h].length<2)){var i=h.split(",");d.rect(.5+parseInt(i[0],10)*b.bucketWidth,.5+parseInt(i[1],10)*b.bucketHeight,b.bucketWidth,b.bucketHeight)}}d.lineWidth=1,d.stroke()},B.inspector=function(a,b){var c,d=a.engine,e=a.selected,f=d.render,g=f.options;if(g.hasBounds){var h=f.bounds.max.x-f.bounds.min.x,i=f.bounds.max.y-f.bounds.min.y,j=h/f.options.width,k=i/f.options.height;b.scale(1/j,1/k),b.translate(-f.bounds.min.x,-f.bounds.min.y)}for(var l=0;l<e.length;l++){var m=e[l].data;switch(b.translate(.5,.5),b.lineWidth=1,b.strokeStyle="rgba(255,165,0,0.9)",b.setLineDash([1,2]),m.type){case"body":c=m.bounds,b.beginPath(),b.rect(Math.floor(c.min.x-3),Math.floor(c.min.y-3),Math.floor(c.max.x-c.min.x+6),Math.floor(c.max.y-c.min.y+6)),b.closePath(),b.stroke();break;case"constraint":var n=m.pointA;m.bodyA&&(n=m.pointB),b.beginPath(),b.arc(n.x,n.y,10,0,2*Math.PI),b.closePath(),b.stroke()}b.setLineDash([0]),b.translate(-.5,-.5)}null!==a.selectStart&&(b.translate(.5,.5),b.lineWidth=1,b.strokeStyle="rgba(255,165,0,0.6)",b.fillStyle="rgba(255,165,0,0.1)",c=a.selectBounds,b.beginPath(),b.rect(Math.floor(c.min.x),Math.floor(c.min.y),Math.floor(c.max.x-c.min.x),Math.floor(c.max.y-c.min.y)),b.closePath(),b.stroke(),b.fill(),b.translate(-.5,-.5)),g.hasBounds&&b.setTransform(1,0,0,1,0,0)};var a=function(a,b){var c=document.createElement("canvas");return c.width=a,c.height=b,c.oncontextmenu=function(){return!1},c.onselectstart=function(){return!1},c},b=function(a){var b=a.getContext("2d"),c=window.devicePixelRatio||1,d=b.webkitBackingStorePixelRatio||b.mozBackingStorePixelRatio||b.msBackingStorePixelRatio||b.oBackingStorePixelRatio||b.backingStorePixelRatio||1;return c/d},d=function(a,b){var c=a.textures[b];return c?c:(c=a.textures[b]=new Image,c.src=b,c)},e=function(a,b){var c=b;/(jpg|gif|png)$/.test(b)&&(c="url("+b+")"),a.canvas.style.background=c,a.canvas.style.backgroundSize="contain",a.currentBackground=b}}();var C={};!function(){C.create=function(a){var b={controller:C,element:null,canvas:null,options:{width:800,height:600,background:"#fafafa",wireframeBackground:"#222",hasBounds:!1,enabled:!0,wireframes:!0,showSleeping:!0,showDebug:!1,showBroadphase:!1,showBounds:!1,showVelocity:!1,showCollisions:!1,showAxes:!1,showPositions:!1,showAngleIndicator:!1,showIds:!1,showShadows:!1}},c=o.extend(b,a),d=!c.options.wireframes&&"transparent"===c.options.background;return c.context=new PIXI.WebGLRenderer(c.options.width,c.options.height,c.canvas,d,!0),c.canvas=c.context.view,c.container=new PIXI.DisplayObjectContainer,c.stage=new PIXI.Stage,c.stage.addChild(c.container),c.bounds=c.bounds||{min:{x:0,y:0},max:{x:c.options.width,y:c.options.height}},c.textures={},c.sprites={},c.primitives={},c.spriteBatch=new PIXI.SpriteBatch,c.container.addChild(c.spriteBatch),o.isElement(c.element)?c.element.appendChild(c.canvas):o.log('No "render.element" passed, "render.canvas" was not inserted into document.',"warn"),c.canvas.oncontextmenu=function(){return!1},c.canvas.onselectstart=function(){return!1},c},C.clear=function(a){for(var b=a.container,c=a.spriteBatch;b.children[0];)b.removeChild(b.children[0]);for(;c.children[0];)c.removeChild(c.children[0]);var d=a.sprites["bg-0"];a.textures={},a.sprites={},a.primitives={},a.sprites["bg-0"]=d,d&&c.addChildAt(d,0),a.container.addChild(a.spriteBatch),a.currentBackground=null,b.scale.set(1,1),b.position.set(0,0)},C.setBackground=function(a,b){if(a.currentBackground!==b){var c=b.indexOf&&-1!==b.indexOf("#"),e=a.sprites["bg-0"];if(c){var f=o.colorToNumber(b);a.stage.setBackgroundColor(f),e&&a.spriteBatch.removeChild(e)}else if(!e){var g=d(a,b);e=a.sprites["bg-0"]=new PIXI.Sprite(g),e.position.x=0,e.position.y=0,a.spriteBatch.addChildAt(e,0)}a.currentBackground=b}},C.world=function(a){var b,d=a.render,e=a.world,f=d.context,g=d.stage,h=d.container,i=d.options,j=c.allBodies(e),k=c.allConstraints(e),l=[];i.wireframes?C.setBackground(d,i.wireframeBackground):C.setBackground(d,i.background);var m=d.bounds.max.x-d.bounds.min.x,n=d.bounds.max.y-d.bounds.min.y,o=m/d.options.width,p=n/d.options.height;if(i.hasBounds){for(b=0;b<j.length;b++){var q=j[b];q.render.sprite.visible=y.overlaps(q.bounds,d.bounds)}for(b=0;b<k.length;b++){var r=k[b],s=r.bodyA,t=r.bodyB,u=r.pointA,v=r.pointB;s&&(u=z.add(s.position,r.pointA)),t&&(v=z.add(t.position,r.pointB)),u&&v&&(y.contains(d.bounds,u)||y.contains(d.bounds,v))&&l.push(r)}h.scale.set(1/o,1/p),h.position.set(-d.bounds.min.x*(1/o),-d.bounds.min.y*(1/p))}else l=k;for(b=0;b<j.length;b++)C.body(a,j[b]);for(b=0;b<l.length;b++)C.constraint(a,l[b]);f.render(g)},C.constraint=function(a,b){var c=a.render,d=b.bodyA,e=b.bodyB,f=b.pointA,g=b.pointB,h=c.container,i=b.render,j="c-"+b.id,k=c.primitives[j];return k||(k=c.primitives[j]=new PIXI.Graphics),i.visible&&b.pointA&&b.pointB?(-1===o.indexOf(h.children,k)&&h.addChild(k),k.clear(),k.beginFill(0,0),k.lineStyle(i.lineWidth,o.colorToNumber(i.strokeStyle),1),d?k.moveTo(d.position.x+f.x,d.position.y+f.y):k.moveTo(f.x,f.y),e?k.lineTo(e.position.x+g.x,e.position.y+g.y):k.lineTo(g.x,g.y),void k.endFill()):void k.clear()},C.body=function(c,d){var e=c.render,f=d.render;if(f.visible)if(f.sprite&&f.sprite.texture){var g="b-"+d.id,h=e.sprites[g],i=e.spriteBatch;h||(h=e.sprites[g]=a(e,d)),-1===o.indexOf(i.children,h)&&i.addChild(h),h.position.x=d.position.x,h.position.y=d.position.y,h.rotation=d.angle,h.scale.x=f.sprite.xScale||1,h.scale.y=f.sprite.yScale||1}else{var j="b-"+d.id,k=e.primitives[j],l=e.container;k||(k=e.primitives[j]=b(e,d),k.initialAngle=d.angle),-1===o.indexOf(l.children,k)&&l.addChild(k),k.position.x=d.position.x,k.position.y=d.position.y,k.rotation=d.angle-k.initialAngle}};var a=function(a,b){var c=b.render,e=c.sprite.texture,f=d(a,e),g=new PIXI.Sprite(f);return g.anchor.x=.5,g.anchor.y=.5,g},b=function(a,b){var c=b.render,d=a.options,e=new PIXI.Graphics;e.clear(),d.wireframes?(e.beginFill(0,0),e.lineStyle(1,o.colorToNumber("#bbb"),1)):(e.beginFill(o.colorToNumber(c.fillStyle),1),e.lineStyle(b.render.lineWidth,o.colorToNumber(c.strokeStyle),1)),e.moveTo(b.vertices[0].x-b.position.x,b.vertices[0].y-b.position.y);for(var f=1;f<b.vertices.length;f++)e.lineTo(b.vertices[f].x-b.position.x,b.vertices[f].y-b.position.y);return e.lineTo(b.vertices[0].x-b.position.x,b.vertices[0].y-b.position.y),e.endFill(),(d.showAngleIndicator||d.showAxes)&&(e.beginFill(0,0),d.wireframes?e.lineStyle(1,o.colorToNumber("#CD5C5C"),1):e.lineStyle(1,o.colorToNumber(b.render.strokeStyle)),e.moveTo(0,0),e.lineTo((b.vertices[0].x+b.vertices[b.vertices.length-1].x)/2-b.position.x,(b.vertices[0].y+b.vertices[b.vertices.length-1].y)/2-b.position.y),e.endFill()),e},d=function(a,b){var c=a.textures[b];return c||(c=a.textures[b]=PIXI.Texture.fromImage(b)),c}}(),d.add=c.add,d.remove=c.remove,d.addComposite=c.addComposite,d.addBody=c.addBody,d.addConstraint=c.addConstraint,d.clear=c.clear,p.run=t.run,a.Body=b,a.Composite=c,a.World=d,a.Contact=e,a.Detector=f,a.Grid=g,a.Pairs=i,a.Pair=h,a.Resolver=k,a.SAT=l,a.Constraint=m,a.MouseConstraint=n,a.Common=o,a.Engine=p,a.Metrics=r,a.Mouse=s,a.Sleeping=u,a.Bodies=v,a.Composites=w,a.Axes=x,a.Bounds=y,a.Vector=z,a.Vertices=A,a.Render=B,a.RenderPixi=C,a.Events=q,a.Query=j,a.Runner=t,"undefined"!=typeof exports&&("undefined"!=typeof module&&module.exports&&(exports=module.exports=a),exports.Matter=a),"function"==typeof define&&define.amd&&define("Matter",[],function(){return a}),"object"==typeof window&&"object"==typeof window.document&&(window.Matter=a)}();
\ No newline at end of file
diff --git a/src/core/Sleeping.js b/src/core/Sleeping.js
index 8e22bdff..55be38ff 100644
--- a/src/core/Sleeping.js
+++ b/src/core/Sleeping.js
@@ -27,7 +27,7 @@ var Sleeping = {};
                 motion = body.speed * body.speed + body.angularSpeed * body.angularSpeed;
 
             // wake up bodies if they have a force applied
-            if (body.force.x != 0 || body.force.y != 0) {
+            if (body.force.x !== 0 || body.force.y !== 0) {
                 Sleeping.set(body, false);
                 continue;
             }