liabru-matter-js/build/matter.min.js

/**
* matter.min.js 0.5.0-edge 2014-03-22
* http://brm.io/matter-js/
* License: MIT
*/

!function(){var a={},b={};!function(){var a=0,c=1;b.create=function(a){var c={id:b.nextId(),angle:0,position:{x:0,y:0},force:{x:0,y:0},torque:0,positionImpulse:{x:0,y: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,groupId:0,slop:.05,render:{visible:!0,sprite:null,path:"L 0 0 L 40 0 L 40 40 L 0 40",lineWidth:1.5}},d=n.extend(c,a);return b.updateProperties(d),d},b.nextId=function(){return a++},b.nextGroupId=function(){return c++},b.updateProperties=function(a){a.vertices=a.vertices||y.fromPath(a.render.path),a.axes=a.axes||v.fromVertices(a.vertices),a.area=y.area(a.vertices),a.bounds=w.create(a.vertices),a.mass=a.mass||a.density*a.area,a.inverseMass=1/a.mass,a.inertia=a.inertia||y.inertia(a.vertices,a.mass),a.inverseInertia=1/a.inertia,a.positionPrev=a.positionPrev||{x:a.position.x,y:a.position.y},a.anglePrev=a.anglePrev||a.angle,a.render.fillStyle=a.render.fillStyle||(a.isStatic?"#eeeeee":n.choose(["#556270","#4ECDC4","#C7F464","#FF6B6B","#C44D58"])),a.render.strokeStyle=a.render.strokeStyle||n.shadeColor(a.render.fillStyle,-20),y.create(a.vertices,a);var b=y.centre(a.vertices);y.translate(a.vertices,a.position),y.translate(a.vertices,b,-1),y.rotate(a.vertices,a.angle,a.position),v.rotate(a.axes,a.angle),w.update(a.bounds,a.vertices,a.velocity),a.isStatic&&(a.restitution=0,a.friction=1,a.mass=a.inertia=a.density=1/0,a.inverseMass=a.inverseInertia=0,a.render.lineWidth=1),s.set(a,a.isSleeping)},b.resetForcesAll=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}},b.applyGravityAll=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)}},b.updateAll=function(a,c,d,e){for(var f=0;f<a.length;f++){var g=a[f];g.isStatic||g.isSleeping||g.bounds.max.x<e.min.x||g.bounds.min.x>e.max.x||g.bounds.max.y<e.min.y||g.bounds.min.y>e.max.y||b.update(g,c,d)}},b.update=function(a,b,c){var d=b*b,e=1-a.frictionAir,f=a.position.x-a.positionPrev.x,g=a.position.y-a.positionPrev.y;a.velocity.x=f*e*c+a.force.x/a.mass*d,a.velocity.y=g*e*c+a.force.y/a.mass*d,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)*e*c+a.torque/a.inertia*d,a.anglePrev=a.angle,a.angle+=a.angularVelocity,a.speed=x.magnitude(a.velocity),a.angularSpeed=Math.abs(a.angularVelocity),y.translate(a.vertices,a.velocity),y.rotate(a.vertices,a.angularVelocity,a.position),v.rotate(a.axes,a.angularVelocity),w.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},b.translate=function(a,b){a.positionPrev.x+=b.x,a.positionPrev.y+=b.y,a.position.x+=b.x,a.position.y+=b.y,y.translate(a.vertices,b),w.update(a.bounds,a.vertices,a.velocity)},b.rotate=function(a,b){a.anglePrev+=b,a.angle+=b,y.rotate(a.vertices,b,a.position),v.rotate(a.axes,b),w.update(a.bounds,a.vertices,a.velocity)}}();var c={};!function(){c.create=function(a){return n.extend({bodies:[],constraints:[],composites:[]},a)},c.add=function(a,b){return a.bodies&&b.bodies&&(a.bodies=a.bodies.concat(b.bodies)),a.constraints&&b.constraints&&(a.constraints=a.constraints.concat(b.constraints)),a.composites&&b.composites&&(a.composites=a.composites.concat(b.composites)),a},c.addBody=function(a,b){return a.bodies=a.bodies||[],a.bodies.push(b),a},c.addConstraint=function(a,b){return a.constraints=a.constraints||[],a.constraints.push(b),a}}();var d={};!function(){d.create=function(a){var b={gravity:{x:0,y:1},bodies:[],constraints:[],bounds:{min:{x:0,y:0},max:{x:800,y:600}}};return n.extend(b,a)},d.clear=function(a,b){a.bodies=b?a.bodies.filter(function(a){return a.isStatic}):[],a.constraints=[]}}();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,f=0;f<a.length;f++){var g=a[f][0],h=a[f][1];if(!(g.groupId&&h.groupId&&g.groupId===h.groupId||(g.isStatic||g.isSleeping)&&(h.isStatic||h.isSleeping)||(d.midphaseTests+=1,!w.overlaps(g.bounds,h.bounds)))){var j,l=i.id(g,h),m=l in e?e[l]:null;j=m&&m.isActive?m.collision:null;var n=k.collides(g,h,j);d.narrowphaseTests+=1,n.reused&&(d.narrowReuseCount+=1),n.collided&&(c.push(n),d.narrowDetections+=1)}}return c},f.bruteForce=function(a,b){for(var c=[],d=b.metrics,e=b.pairs.table,f=0;f<a.length;f++)for(var g=f+1;g<a.length;g++){var h=a[f],j=a[g];if(!(h.groupId&&j.groupId&&h.groupId===j.groupId||(h.isStatic||h.isSleeping)&&(j.isStatic||j.isSleeping)||(d.midphaseTests+=1,!w.overlaps(h.bounds,j.bounds)))){var l,m=i.id(h,j),n=m in e?e[m]:null;l=n&&n.isActive?n.collision:null;var o=k.collides(h,j,l);d.narrowphaseTests+=1,o.reused&&(d.narrowReuseCount+=1),o.collided&&(c.push(o),d.narrowDetections+=1)}}return c}}();var g={};!function(){g.create=function(a,b){return{buckets:{},pairs:{},pairsList:[],bucketWidth:a||48,bucketHeight:b||48}},g.update=function(c,g,i,k){var l,m,n,o,p,q=i.world,r=c.buckets,s=i.metrics,t=!1;for(s.broadphaseTests=0,l=0;l<g.length;l++){var u=g[l];if(!u.isSleeping&&!(u.bounds.max.x<0||u.bounds.min.x>q.bounds.width||u.bounds.max.y<0||u.bounds.min.y>q.bounds.height)){var v=b(c,u);if(!u.region||v.id!==u.region.id||k){s.broadphaseTests+=1,(!u.region||k)&&(u.region=v);var w=a(v,u.region);for(m=w.startCol;m<=w.endCol;m++)for(n=w.startRow;n<=w.endRow;n++){p=d(m,n),o=r[p];var 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f=i.id(c,e),g=a.pairs[f];g?g[2]+=1:a.pairs[f]=[c,e,1]}}b.push(c)},h=function(a,b,c){b.splice(b.indexOf(c),1);for(var d=0;d<b.length;d++){var e=b[d],f=i.id(c,e),g=a.pairs[f];g&&(g[2]-=1)}},j=function(a){var b,c,d=[];b=n.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(){var a=1e3;h.updatePairs=function(a,b,c){var d,e,f,g,h=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=i.id(d.bodyA,d.bodyB),n.push(e),e in j?(f=j[e],f.isActive?m.push(f):k.push(f),i.update(f,d,c)):(f=i.create(d,c),j[e]=f,k.push(f),h.push(f)));for(g=0;g<h.length;g++)f=h[g],f.isActive&&-1===n.indexOf(f.id)&&(i.setActive(f,!1,c),l.push(f))},h.removeOldPairs=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)}}();var i={};!function(){i.create=function(a,b){var c=a.bodyA,d=a.bodyB,e={id:i.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 i.update(e,a,b),e},i.update=function(a,b,c){var d=a.contacts,f=b.supports,g=a.activeContacts;if(a.collision=b,g.length=0,b.collided){for(var h=0;h<f.length;h++){var j=f[h],k=e.id(j);g.push(k in d?d[k]:d[k]=e.create(j))}a.separation=b.depth,i.setActive(a,!0,c)}else a.isActive===!0&&i.setActive(a,!1,c)},i.setActive=function(a,b,c){b?(a.isActive=!0,a.timeUpdated=c):(a.isActive=!1,a.activeContacts.length=0)},i.id=function(a,b){return a.id<b.id?a.id+"_"+b.id:b.id+"_"+a.id}}();var j={};!function(){var a=4,b=.2,c=.6;j.solvePosition=function(a){var c,d,e,f,g,h,i,j,k;for(c=0;c<a.length;c++)d=a[c],d.isActive&&(e=d.collision,f=e.bodyA,g=e.bodyB,h=e.supports[0],i=e.supportCorrected,j=e.normal,k=x.sub(x.add(g.positionImpulse,h),x.add(f.positionImpulse,i)),d.separation=x.dot(j,k));for(c=0;c<a.length;c++)d=a[c],d.isActive&&(e=d.collision,f=e.bodyA,g=e.bodyB,j=e.normal,positionImpulse=d.separation*b-d.slop,(f.isStatic||g.isStatic)&&(positionImpulse*=2),f.isStatic||f.isSleeping||(f.positionImpulse.x+=j.x*positionImpulse,f.positionImpulse.y+=j.y*positionImpulse),g.isStatic||g.isSleeping||(g.positionImpulse.x-=j.x*positionImpulse,g.positionImpulse.y-=j.y*positionImpulse))},j.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,y.translate(d.vertices,d.positionImpulse),w.update(d.bounds,d.vertices,d.velocity),d.positionImpulse.x*=c,d.positionImpulse.y*=c)}},j.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=x.sub(l,g.position),g.positionPrev.x+=p.x*g.inverseMass,g.positionPrev.y+=p.y*g.inverseMass,g.anglePrev+=x.cross(o,p)*g.inverseInertia),h.isStatic||h.isSleeping||(o=x.sub(l,h.position),h.positionPrev.x-=p.x*h.inverseMass,h.positionPrev.y-=p.y*h.inverseMass,h.anglePrev-=x.cross(o,p)*h.inverseInertia)},j.solveVelocity=function(b){for(var c={},d=0;d<b.length;d++){var e=b[d];if(e.isActive){var f=e.collision,g=f.bodyA,h=f.bodyB,i=f.normal,j=f.tangent,k=e.activeContacts,l=1/k.length;g.velocity.x=g.position.x-g.positionPrev.x,g.velocity.y=g.position.y-g.positionPrev.y,h.velocity.x=h.position.x-h.positionPrev.x,h.velocity.y=h.position.y-h.positionPrev.y,g.angularVelocity=g.angle-g.anglePrev,h.angularVelocity=h.angle-h.anglePrev;for(var m=0;m<k.length;m++){var o=k[m],p=o.vertex,q=x.sub(p,g.position),r=x.sub(p,h.position),s=x.add(g.velocity,x.mult(x.perp(q),g.angularVelocity)),t=x.add(h.velocity,x.mult(x.perp(r),h.angularVelocity)),u=x.sub(s,t),v=x.dot(i,u),w=x.dot(j,u),y=Math.abs(w),z=n.sign(w),A=(1+e.restitution)*v,B=n.clamp(e.separation+v,0,1),C=w;y>B*e.friction&&(C=B*e.friction*z);var D=x.cross(q,i),E=x.cross(r,i),F=l/(e.inverseMass+g.inverseInertia*D*D+h.inverseInertia*E*E);if(A*=F,C*=F,0>v&&v*v>a)o.normalImpulse=0,o.tangentImpulse=0;else{var G=o.normalImpulse;o.normalImpulse=Math.min(o.normalImpulse+A,0),A=o.normalImpulse-G;var H=o.tangentImpulse;o.tangentImpulse=n.clamp(o.tangentImpulse+C,-y,y),C=o.tangentImpulse-H}c.x=i.x*A+j.x*C,c.y=i.y*A+j.y*C,g.isStatic||g.isSleeping||(g.positionPrev.x+=c.x*g.inverseMass,g.positionPrev.y+=c.y*g.inverseMass,g.anglePrev+=x.cross(q,c)*g.inverseInertia),h.isStatic||h.isSleeping||(h.positionPrev.x-=c.x*h.inverseMass,h.positionPrev.y-=c.y*h.inverseMass,h.anglePrev-=x.cross(r,c)*h.inverseInertia)}}}}}();var k={};!function(){k.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,x.dot(i.normal,x.sub(d.position,b.position))>0&&(i.normal=x.neg(i.normal)),i.tangent=x.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=[n[0]];if(y.contains(b.vertices,n[1]))o.push(n[1]);else{var p=c(d,b,x.neg(i.normal));y.contains(d.vertices,p[0])&&o.push(p[0]),o.length<2&&y.contains(d.vertices,p[1])&&o.push(p[1])}return i.supports=o,i.supportCorrected=x.sub(n[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=x.dot(b[0],c),e=d,f=1;f<b.length;f+=1){var g=x.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=-x.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=-x.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=-x.dot(c,g),f>d&&(f=d,k=e),[j,k]}}();var l={};!function(){var a=1e-6,b=0;l.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?x.add(c.bodyA.position,c.pointA):c.pointA,e=c.bodyB?x.add(c.bodyB.position,c.pointB):c.pointB,f=x.magnitude(x.sub(d,e));c.length=c.length||f||a;var g={visible:!0,lineWidth:2,strokeStyle:"#666"};return 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d=Math.cos(b),e=Math.sin(b);return{x:c.x+((a.x-c.x)*d-(a.y-c.y)*e),y:c.y+((a.x-c.x)*e+(a.y-c.y)*d)}},x.normalise=function(a){var b=x.magnitude(a);return 0===b?{x:0,y:0}:{x:a.x/b,y:a.y/b}},x.dot=function(a,b){return a.x*b.x+a.y*b.y},x.cross=function(a,b){return a.x*b.y-a.y*b.x},x.add=function(a,b){return{x:a.x+b.x,y:a.y+b.y}},x.sub=function(a,b){return{x:a.x-b.x,y:a.y-b.y}},x.mult=function(a,b){return{x:a.x*b,y:a.y*b}},x.div=function(a,b){return{x:a.x/b,y:a.y/b}},x.perp=function(a,b){return b=b===!0?-1:1,{x:b*-a.y,y:b*a.x}},x.neg=function(a){return{x:-a.x,y:-a.y}}}();var y={};!function(){y.create=function(a,b){for(var c=0;c<a.length;c++)a[c].index=c,a[c].body=b},y.fromPath=function(a){var b=/L\s*([\-\d\.]*)\s*([\-\d\.]*)/gi,c=[];return a.replace(b,function(a,b,d){c.push({x:parseFloat(b,10),y:parseFloat(d,10)})}),c},y.centre=function(a){for(var b=0,c=0,d=0;d<a.length;d++)b+=a[d].x,c+=a[d].y;return{x:b/a.length,y:c/a.length}},y.area=function(a){for(var b=0,c=a.length-1,d=0;d<a.length;d++)b+=(a[c].x-a[d].x)*(a[c].y+a[d].y),c=d;return Math.abs(b)/2},y.inertia=function(a,b){for(var c,d,e=0,f=0,g=a,h=0;h<g.length;h++)d=(h+1)%g.length,c=Math.abs(x.cross(g[d],g[h])),e+=c*(x.dot(g[d],g[d])+x.dot(g[d],g[h])+x.dot(g[h],g[h])),f+=c;return b/6*(e/f)},y.translate=function(a,b,c){var d;if(c)for(d=0;d<a.length;d++)a[d].x+=b.x*c,a[d].y+=b.y*c;else for(d=0;d<a.length;d++)a[d].x+=b.x,a[d].y+=b.y},y.rotate=function(a,b,c){if(0!==b)for(var d=Math.cos(b),e=Math.sin(b),f=0;f<a.length;f++){var g=a[f],h=g.x-c.x,i=g.y-c.y;g.x=c.x+(h*d-i*e),g.y=c.y+(h*e+i*d)}},y.contains=function(a,b){for(var c=0;c<a.length;c++){var d=a[c],e=a[(c+1)%a.length];if((b.x-d.x)*(e.y-d.y)+(b.y-d.y)*(d.x-e.x)>0)return!1}return!0}}();var z={};!function(){z.create=function(a,b){var c,e=window.dat&&window.localStorage;if(!e)return void console.log("Could not create GUI. 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k=f.addFolder("World");k.add(h,"load"),k.add(h,"save"),k.add(h,"clear"),k.open();var l=k.addFolder("Gravity");l.add(a.world.gravity,"x",-1,1).step(.01),l.add(a.world.gravity,"y",-1,1).step(.01),l.open();var m=f.addFolder("Engine");m.add(a,"enableSleeping"),m.add(a.broadphase,"current",["grid","bruteForce"]),m.add(a,"timeScale",.1,2).step(.1),m.add(a,"velocityIterations",1,10).step(1),m.add(a,"positionIterations",1,10).step(1),m.add(a,"enabled"),m.open();var n=f.addFolder("Render");return n.add(g,"renderer",["canvas","webgl"]).onFinishChange(function(b){var c;"canvas"===b&&(c=A),"webgl"===b&&(c=B),a.render.element.removeChild(a.render.canvas);var d=a.render.options;a.render=c.create({element:a.render.element,options:d}),a.render.options=d,a.input.mouse=r.create(a.render.canvas),a.mouseConstraint.mouse=a.input.mouse}),n.add(a.render.options,"wireframes"),n.add(a.render.options,"showDebug"),n.add(a.render.options,"showPositions"),n.add(a.render.options,"showBroadphase"),n.add(a.render.options,"showBounds"),n.add(a.render.options,"showVelocity"),n.add(a.render.options,"showCollisions"),n.add(a.render.options,"showAxes"),n.add(a.render.options,"showAngleIndicator"),n.add(a.render.options,"showSleeping"),n.add(a.render.options,"showIds"),n.add(a.render.options,"showShadows"),n.add(a.render.options,"enabled"),n.open(),g},z.update=function(a,b){var c;b=b||a.datGui;for(c in b.__folders)z.update(a,b.__folders[c]);for(c in b.__controllers){var d=b.__controllers[c];d.updateDisplay&&d.updateDisplay()}},z.closeAll=function(a){var b=a.datGui;for(var c in b.__folders)b.__folders[c].close()}}();var A={};!function(){A.create=function(b){var c={controller:A,element:null,canvas:null,options:{width:800,height:600,background:"#fafafa",wireframeBackground:"#222",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}},d=n.extend(c,b);return d.canvas=d.canvas||a(d.options.width,d.options.height),d.context=d.canvas.getContext("2d"),d.textures={},A.setBackground(d,d.options.background),n.isElement(d.element)?d.element.appendChild(d.canvas):n.log('No "render.element" passed, "render.canvas" was not inserted into document.',"warn"),d},A.setBackground=function(a,b){if(a.currentBackground!==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}},A.world=function(a){var b=a.render,c=a.world,d=b.canvas,e=b.context,f=b.options;f.wireframes?A.setBackground(b,f.wireframeBackground):A.setBackground(b,f.background),e.globalCompositeOperation="source-in",e.fillStyle="transparent",e.fillRect(0,0,d.width,d.height),e.globalCompositeOperation="source-over",!f.wireframes||a.enableSleeping&&f.showSleeping?A.bodies(a,c.bodies,e):A.bodyWireframes(a,c.bodies,e),f.showBounds&&A.bodyBounds(a,c.bodies,e),(f.showAxes||f.showAngleIndicator)&&A.bodyAxes(a,c.bodies,e),f.showPositions&&A.bodyPositions(a,c.bodies,e),f.showVelocity&&A.bodyVelocity(a,c.bodies,e),f.showIds&&A.bodyIds(a,c.bodies,e),f.showCollisions&&A.collisions(a,a.pairs.list,e),A.constraints(c.constraints,e),f.showBroadphase&&"grid"===a.broadphase.current&&A.grid(a,a.broadphase[a.broadphase.current].instance,e),f.showDebug&&A.debug(a,e)},A.debug=function(a,b){var c=b,d=a.world,e=a.render,f=e.options,h="    ";if(a.timing.timestamp-(e.debugTimestamp||0)>=500){var i="";i+="fps: 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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()}}},A.bodyShadows=function(a,b,c){for(var d=c,e=a.render,f=(e.options,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}}},A.bodies=function(a,c,d){var e,f=d,g=a.render,h=g.options;for(e=0;e<c.length;e++){var i=c[e];if(i.render.visible)if(i.render.sprite&&!h.wireframes){var j=i.render.sprite,k=b(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?n.shadeColor(i.render.fillStyle,50):i.render.fillStyle,f.lineWidth=i.render.lineWidth,f.strokeStyle=i.render.strokeStyle,f.fill(),f.stroke())}}},A.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()},A.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()},A.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()},A.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()},A.bodyVelocity=function(a,b,c){{var d=c,e=a.render;e.options}d.beginPath();for(var f=0;f<b.length;f++){var g=b[f];g.render.visible&&(d.moveTo(g.position.x,g.position.y),d.lineTo(g.position.x+2*(g.position.x-g.positionPrev.x),g.position.y+2*(g.position.y-g.positionPrev.y)))}d.lineWidth=3,d.strokeStyle="cornflowerblue",d.stroke()},A.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))}},A.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()},A.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=n.keys(b.buckets),g=0;g<f.length;g++){var h=f[g];if(!(b.buckets[h].length<2)){var 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