diff --git a/examples/spark/.babelrc b/examples/spark/.babelrc
index b55ce67..410d04d 100644
--- a/examples/spark/.babelrc
+++ b/examples/spark/.babelrc
@@ -1,3 +1,12 @@
 {
+    "presets": [
+        [
+            "@babel/preset-env",
+            {
+                "useBuiltIns": "entry",
+                "corejs": 3
+            }
+        ]
+    ],
     "plugins": ["@babel/plugin-transform-object-assign"]
 }
\ No newline at end of file
diff --git a/examples/spark/package-lock.json b/examples/spark/package-lock.json
index bed047b..8698087 100644
--- a/examples/spark/package-lock.json
+++ b/examples/spark/package-lock.json
@@ -1471,6 +1471,12 @@
         "regenerator-runtime": "^0.11.0"
       },
       "dependencies": {
+        "core-js": {
+          "version": "2.6.11",
+          "resolved": "https://registry.npmjs.org/core-js/-/core-js-2.6.11.tgz",
+          "integrity": "sha512-5wjnpaT/3dV+XB4borEsnAYQchn00XSgTAWKDkEqv+K8KevjbzmofK6hfJ9TZIlpj2N0xQpazy7PiRQiWHqzWg==",
+          "dev": true
+        },
         "regenerator-runtime": {
           "version": "0.11.1",
           "resolved": "https://registry.npmjs.org/regenerator-runtime/-/regenerator-runtime-0.11.1.tgz",
@@ -2018,10 +2024,9 @@
       "integrity": "sha1-Z29us8OZl8LuGsOpJP1hJHSPV40="
     },
     "core-js": {
-      "version": "2.6.11",
-      "resolved": "https://registry.npmjs.org/core-js/-/core-js-2.6.11.tgz",
-      "integrity": "sha512-5wjnpaT/3dV+XB4borEsnAYQchn00XSgTAWKDkEqv+K8KevjbzmofK6hfJ9TZIlpj2N0xQpazy7PiRQiWHqzWg==",
-      "dev": true
+      "version": "3.6.4",
+      "resolved": "https://registry.npmjs.org/core-js/-/core-js-3.6.4.tgz",
+      "integrity": "sha512-4paDGScNgZP2IXXilaffL9X7968RuvwlkK3xWtZRVqgd8SYNiVKRJvkFd1aqqEuPfN7E68ZHEp9hDj6lHj4Hyw=="
     },
     "core-js-compat": {
       "version": "3.6.4",
diff --git a/examples/spark/package.json b/examples/spark/package.json
index c52d777..cf78c9d 100644
--- a/examples/spark/package.json
+++ b/examples/spark/package.json
@@ -10,6 +10,7 @@
     "start": "npm run dev"
   },
   "dependencies": {
+    "core-js": "^3.6.4",
     "physar": "file:../..",
     "short-uuid": "^3.1.1",
     "webpack": "^4.41.6"
@@ -23,7 +24,6 @@
     "babel-core": "^7.0.0-bridge.0",
     "babel-loader": "^8.0.0-beta.6",
     "babel-plugin-transform-class-properties": "^6.24.1",
-    "core-js": "^2.5.2",
     "regenerator-runtime": "^0.13.3",
     "webpack-cli": "^3.3.11"
   }
diff --git a/examples/spark/physar_examples/scripts/script.js b/examples/spark/physar_examples/scripts/script.js
index 42c1a65..97a6e98 100644
--- a/examples/spark/physar_examples/scripts/script.js
+++ b/examples/spark/physar_examples/scripts/script.js
@@ -1 +1,8 @@
-!function(t){var e={};function s(r){if(e[r])return e[r].exports;var i=e[r]={i:r,l:!1,exports:{}};return t[r].call(i.exports,i,i.exports,s),i.l=!0,i.exports}s.m=t,s.c=e,s.d=function(t,e,r){s.o(t,e)||Object.defineProperty(t,e,{enumerable:!0,get:r})},s.r=function(t){"undefined"!=typeof Symbol&&Symbol.toStringTag&&Object.defineProperty(t,Symbol.toStringTag,{value:"Module"}),Object.defineProperty(t,"__esModule",{value:!0})},s.t=function(t,e){if(1&e&&(t=s(t)),8&e)return t;if(4&e&&"object"==typeof t&&t&&t.__esModule)return t;var r=Object.create(null);if(s.r(r),Object.defineProperty(r,"default",{enumerable:!0,value:t}),2&e&&"string"!=typeof t)for(var i in t)s.d(r,i,function(e){return t[e]}.bind(null,i));return r},s.n=function(t){var e=t&&t.__esModule?function(){return t.default}:function(){return t};return s.d(e,"a",e),e},s.o=function(t,e){return Object.prototype.hasOwnProperty.call(t,e)},s.p="",s(s.s=4)}([function(t,e){t.exports=require("Time")},function(t,e){t.exports=require("cannon")},function(t,e){t.exports=require("Diagnostics")},function(t,e){t.exports=require("Scene")},function(t,e,s){"use strict";s.r(e);const r=s(3),i=r.root.find("SphereObject"),n=r.root.find("Cube01"),o=r.root.find("plane0"),a=new class{constructor(t){this.Diagnostics=void 0,this.Time=void 0,this.currentInterval=void 0,this.lastInterval=void 0,this.lastTime=void 0,this.fixedTimeStep=1/60,this.maxSubSteps=3,this.timeInterval=5,this.C=void 0,this.worldObjects=[],this.worldConstraints=[],this.defaults={body:{mass:0,radius:1,transform:{rotation:{x:0,y:0,z:0,w:.5},position:{x:0,y:0,z:0},scale:{x:1,y:1,z:1}}},sync:{properties:["position","rotation"],axes:["x","y","z"],rotation:{enabled:!0,allAxis:!0,x:!0,y:!0,z:!0},position:{enabled:!0,allAxis:!0,x:!0,y:!0,z:!0}}},this.initRequiredSparkModules(),this.createCWorld(t)}initRequiredSparkModules(){this.Time=s(0),this.C=s(1),this.Diagnostics=s(2)}createCWorld(t){this.world=new this.C.World,this.world.broadphase=new this.C.NaiveBroadphase,this.world.gravity.set(t.x,t.y,t.z)}beginSync(){this.initialWorldState=this.worldObjects,this.currentInterval=this.Time.setInterval(t=>{if(void 0!==this.lastTime){let e=(t-this.lastTime)/1e3;this.world.step(this.fixedTimeStep,e,this.maxSubSteps),this.objectSync()}this.lastTime=t},this.timeInterval)}objectSync(){this.worldObjects.forEach(t=>{if(t.spark){const e=t.sync,s=e.properties,r=e.axes,i={};t.body.quaternion.toEuler(i),s.forEach(e=>{t.sync[e].enabled&&r.forEach(s=>{if(t.sync[e].allAxis||t.sync[e][s]){const r=`rotation${s.toUpperCase()}`;"position"==e&&(t.spark.transform[s]=t.body[e][s]),"rotation"==e&&(t.spark.transform[r]=i[s])}})})}})}stopSync(){this.currentInterval&&(this.Time.clearInterval(this.currentInterval),this.lastInterval=currentInterval,this.currentInterval=void 0),this.resetWorldState()}getDefaults(t){return t?this.defaults[t]:this.defaults}fillWithDefaults(t){const e=this.getDefaults();return Object.keys(e).forEach(s=>{t.hasOwnProperty(s)||(t[s]=e[s]),Object.keys(e[s]).forEach(r=>{Array.isArray(t[s][r])?e[s][r].forEach(i=>{t[s][r].indexOf(i)<0&&t[s][r].push(e[s][r][i])}):(t[s].hasOwnProperty(r)||(t[s][r]=e[s][r]),"object"!=typeof e[s][r]||Array.isArray(e[s][r])||Object.keys(e[s][r]).forEach(i=>{t[s][r].hasOwnProperty(i)||(t[s][r][i]=e[s][r][i])}))})}),t}resetWorldState(){this.initialWorldState&&this.worldObjects.forEach((t,e)=>{const s=this.initialWorldState[e],r=s.body,i=t.body;if(i.velocity.setZero(),i.initVelocity.setZero(),i.angularVelocity.setZero(),i.initAngularVelocity.setZero(),i.force.setZero(),i.torque.setZero(),i.quaternion=r.quaternion,i.position=r.position,t.spark){const e=t.sync,r=e.properties,i=e.axes,n={};t.body.quaternion.toEuler(n),r.forEach(e=>{t.sync[e].enabled&&i.forEach(r=>{if(t.sync[e].allAxis||t.sync[e][r]){const i=`rotation${r.toUpperCase()}`;"position"==e&&(t.spark.transform[r]=s.spark.transform[r]),"rotation"==e&&(t.spark.transform[i]=s.spark.transform[i])}})})}})}createObject(t,e,s){const{sync:r,body:i}=this.fillWithDefaults(s),{mass:n,radius:o,transform:a}=i,c=a.rotation,d=a.scale,l=a.position,h=new this.C.Vec3(l.x,l.y,l.z),u=new this.C.Quaternion(c.x,c.y,c.z,c.w),f=t=>{switch(t){case"box":return new this.C.Box(new this.C.Vec3(d.x,d.y,d.z));case"sphere":return new this.C.Sphere(o);case"ground":return new this.C.Plane}},p=t=>{const s={mass:n,shape:t,position:h,quaternion:u,angularDamping:.8};return"sphere"==e&&(s.radius=o),"ground"==e&&(s.mass=0),s},y=(t=>{const e=new this.C.Body(p(f(t)));if("ground"==t){const t=-Math.PI/2,s=new this.C.Vec3(1,0,0);e.quaternion.setFromAxisAngle(s,t)}return e})(e);return this.addObjectToPhysicsWorld(y,t,r,"ground"==e)}find(t=0,e){return"object"==t?this.worldObjects.find(t=>t.id==e):"constraint"==t?this.worldConstraints.find(t=>t.id==e):void 0}createConstraint(t,e={}){if(!e.bodyA||!e.bodyB)return;let[s,r,i,n,o,a]=e;const c={pivotA:i,pivotB:n,axisA:o,axisB:a},d=this.find("object",s),l=this.find("object",r);if(!d||!l)return;let h;switch(t){case"point":h=new this.C.PointToPointConstraint(s,i,r,n);break;case"hinge":h=new this.C.HingeConstraint(s,r,c);break;case"conetwist":h=new this.C.ConeTwistConstraint(s,r,c);break;case"lock":h=new this.C.LockConstraint(i,n,{});break;default:return}return this.addConstraint(h,d,l)}addConstraint(t,e,s){if(!e.body||!s.body)return;const r=e.body,i=s.body;this.world.addConstraint(t);const n=btoa(`${r.id}.${i.id}`);return this.worldConstraints.push({id:n,constraint:t,isActive:!0}),n}removeConstraint(t,e=!1){const s=this.find("constraint",t);if(s&&this.world.removeConstraint(s.constraint),e){const t=this.worldConstraints.indexOf(s);this.worldConstraints.splice(t,1)}}pauseConstraint(t){const e=this.find("constraint",t);e&&this.removeConstraint(t,!1);const s=this.worldConstraints.indexOf(e);this.worldConstraints[s].isActive=!1}resumeConstraint(t){const e=this.find("constraint",t),s=e.constraint;if(e&&0==e.isActive){this.world.addConstraint(s);const t=this.worldConstraints.indexOf(e);this.worldConstraints[t].isActive=!0}}log(t){this.Diagnostics.log(t)}addObjectToPhysicsWorld(t,e,s,r){this.world.addBody(t);const i={...this.getDefaults("sync"),...s},n=((t,e)=>{for(e=t="";t++<36;e+=51*t&52?(15^t?8^Math.random()*(20^t?16:4):4).toString(16):"-");return e})(),o={id:n,body:t,spark:e,sync:i,isGround:r};return this.worldObjects.push(o),n}createCMaterial(t){let e=void 0;return null==t&&(e=new this.C.Material),e}start(){this.beginSync()}}({x:0,y:-9.82,z:0});a.createObject(o,"ground",{body:{mass:0,transform:{position:{x:0,y:0,z:0}}}});const c=a.createObject(i,"sphere",{body:{mass:1,radius:.01,transform:{position:{x:0,y:2,z:0}}}}),d=a.createObject(n,"box",{body:{mass:5,transform:{scale:{x:.01,y:.01,z:.01},position:{x:0,y:10,z:0},rotation:{x:.2,y:.8,z:.3,w:0}}}});a.addConstraint("point",c,d);a.start()}]);
\ No newline at end of file
+!function(t){var r={};function e(n){if(r[n])return r[n].exports;var i=r[n]={i:n,l:!1,exports:{}};return t[n].call(i.exports,i,i.exports,e),i.l=!0,i.exports}e.m=t,e.c=r,e.d=function(t,r,n){e.o(t,r)||Object.defineProperty(t,r,{enumerable:!0,get:n})},e.r=function(t){"undefined"!=typeof Symbol&&Symbol.toStringTag&&Object.defineProperty(t,Symbol.toStringTag,{value:"Module"}),Object.defineProperty(t,"__esModule",{value:!0})},e.t=function(t,r){if(1&r&&(t=e(t)),8&r)return t;if(4&r&&"object"==typeof t&&t&&t.__esModule)return t;var n=Object.create(null);if(e.r(n),Object.defineProperty(n,"default",{enumerable:!0,value:t}),2&r&&"string"!=typeof t)for(var i in t)e.d(n,i,function(r){return t[r]}.bind(null,i));return n},e.n=function(t){var r=t&&t.__esModule?function(){return t.default}:function(){return t};return e.d(r,"a",r),r},e.o=function(t,r){return Object.prototype.hasOwnProperty.call(t,r)},e.p="",e(e.s=2)}({0:function(t,r,e){"use strict";(function(t){e.d(r,"a",(function(){return i}));var n=e(1);class i{constructor(t){this.Diagnostics=void 0,this.Time=void 0,this.currentInterval=void 0,this.lastInterval=void 0,this.lastTime=void 0,this.fixedTimeStep=1/60,this.maxSubSteps=3,this.timeInterval=5,this.C=void 0,this.worldObjects=[],this.worldConstraints=[],this.defaults={body:{mass:0,radius:1,transform:{rotation:{x:0,y:0,z:0,w:.5},position:{x:0,y:0,z:0},scale:{x:1,y:1,z:1}}},sync:{properties:["position","rotation"],axes:["x","y","z"],rotation:{enabled:!0,allAxis:!0,x:!0,y:!0,z:!0},position:{enabled:!0,allAxis:!0,x:!0,y:!0,z:!0}}},this.initRequiredSparkModules(),this.createCWorld(t)}initRequiredSparkModules(){this.Time=e(366),this.C=e(367),this.Diagnostics=e(368)}createCWorld(t){this.world=new this.C.World,this.world.broadphase=new this.C.NaiveBroadphase,this.world.gravity.set(t.x,t.y,t.z)}beginSync(){this.initialWorldState=this.worldObjects,this.currentInterval=this.Time.setInterval(t=>{if(void 0!==this.lastTime){let r=(t-this.lastTime)/1e3;this.world.step(this.fixedTimeStep,r,this.maxSubSteps),this.objectSync()}this.lastTime=t},this.timeInterval)}objectSync(){this.worldObjects.forEach(t=>{if(t.spark){const r=t.sync,e=r.properties,n=r.axes,i={};t.body.quaternion.toEuler(i),e.forEach(r=>{t.sync[r].enabled&&n.forEach(e=>{if(t.sync[r].allAxis||t.sync[r][e]){const n=`rotation${e.toUpperCase()}`;"position"==r&&(t.spark.transform[e]=t.body[r][e]),"rotation"==r&&(t.spark.transform[n]=i[e])}})})}})}stopSync(){this.currentInterval&&(this.Time.clearInterval(this.currentInterval),this.lastInterval=currentInterval,this.currentInterval=void 0),this.resetWorldState()}getDefaults(t){return t?this.defaults[t]:this.defaults}fillWithDefaults(t){const r=this.getDefaults();return Object.keys(r).forEach(e=>{t.hasOwnProperty(e)||(t[e]=r[e]),Object.keys(r[e]).forEach(n=>{Array.isArray(t[e][n])?r[e][n].forEach(i=>{t[e][n].indexOf(i)<0&&t[e][n].push(r[e][n][i])}):(t[e].hasOwnProperty(n)||(t[e][n]=r[e][n]),"object"!=typeof r[e][n]||Array.isArray(r[e][n])||Object.keys(r[e][n]).forEach(i=>{t[e][n].hasOwnProperty(i)||(t[e][n][i]=r[e][n][i])}))})}),t}resetWorldState(){this.initialWorldState&&this.worldObjects.forEach((t,r)=>{const e=this.initialWorldState[r],n=e.body,i=t.body;if(i.velocity.setZero(),i.initVelocity.setZero(),i.angularVelocity.setZero(),i.initAngularVelocity.setZero(),i.force.setZero(),i.torque.setZero(),i.quaternion=n.quaternion,i.position=n.position,t.spark){const r=t.sync,n=r.properties,i=r.axes,o={};t.body.quaternion.toEuler(o),n.forEach(r=>{t.sync[r].enabled&&i.forEach(n=>{if(t.sync[r].allAxis||t.sync[r][n]){const i=`rotation${n.toUpperCase()}`;"position"==r&&(t.spark.transform[n]=e.spark.transform[n]),"rotation"==r&&(t.spark.transform[i]=e.spark.transform[i])}})})}})}createObject(t,r,e){const{sync:n,body:i}=this.fillWithDefaults(e),{mass:o,radius:s,transform:a}=i,u=a.rotation,f=a.scale,h=a.position,c=new this.C.Vec3(h.x,h.y,h.z),l=new this.C.Quaternion(u.x,u.y,u.z,u.w),p=t=>{switch(t){case"box":return new this.C.Box(new this.C.Vec3(f.x,f.y,f.z));case"sphere":return new this.C.Sphere(s);case"ground":return new this.C.Plane}},d=t=>{const e={mass:o,shape:t,position:c,quaternion:l,angularDamping:.8};return"sphere"==r&&(e.radius=s),"ground"==r&&(e.mass=0),e},y=(t=>{const r=new this.C.Body(d(p(t)));if("ground"==t){const t=-Math.PI/2,e=new this.C.Vec3(1,0,0);r.quaternion.setFromAxisAngle(e,t)}return r})(r);return this.addObjectToPhysicsWorld(y,t,n,"ground"==r)}find(t,r){if("object"==t)for(var e=0;e<this.worldObjects.length;e++)if(this.worldObjects[e].id==r)return this.worldObjects[e];if("constraint"==t)for(e=0;e<this.worldConstraints.length;e++)if(this.worldConstraints[e].id==r)return this.worldConstraints[e]}createConstraint(t,r={}){if(!r.bodyA||!r.bodyB)return;let{bodyA:e,bodyB:n,pivotA:i,pivotB:o,axisA:s,axisB:a}=r;const u={pivotA:i,pivotB:o,axisA:s,axisB:a},f=this.find("object",e),h=this.find("object",n);if(!f||!h)return void this.log("Bodies where not found.");let c;switch(t){case"point":c=new this.C.PointToPointConstraint(f.body,i,h.body,o);break;case"hinge":c=new this.C.HingeConstraint(f.body,h.body,u);break;case"conetwist":c=new this.C.ConeTwistConstraint(f.body,h.body,u);break;case"lock":c=new this.C.LockConstraint(i,o,{});break;default:return}return this.addConstraintToWorld(c,f.id,h.id)}addConstraintToWorld(r,e,n){if(!e||!n)return;this.world.addConstraint(r),this.log("Added constraint to world.");const i=new t.from(`${e}.${n}`).toString("base64"),o={id:i,constraint:r,isActive:!0};return this.worldConstraints.push(o),i}removeConstraint(t,r=!1){const e=this.find("constraint",t);if(e&&this.world.removeConstraint(e.constraint),r){const t=this.worldConstraints.indexOf(e);this.worldConstraints.splice(t,1)}}pauseConstraint(t){const r=this.find("constraint",t);r&&this.removeConstraint(t,!1);const e=this.worldConstraints.indexOf(r);this.worldConstraints[e].isActive=!1}resumeConstraint(t){const r=this.find("constraint",t),e=r.constraint;if(r&&0==r.isActive){this.world.addConstraint(e);const t=this.worldConstraints.indexOf(r);this.worldConstraints[t].isActive=!0}}log(t){this.Diagnostics.log(t)}addObjectToPhysicsWorld(t,r,e,i){this.world.addBody(t);const o={...this.getDefaults("sync"),...e},s=Object(n.a)(),a={id:s,body:t,spark:r,sync:o,isGround:i};return this.worldObjects.push(a),s}createCMaterial(t){let r=void 0;return null==t&&(r=new this.C.Material),r}start(){this.beginSync()}}}).call(this,e(3).Buffer)},1:function(t,r,e){"use strict";e.d(r,"a",(function(){return n}));const n=(t,r)=>{for(r=t="";t++<36;r+=51*t&52?(15^t?8^Math.random()*(20^t?16:4):4).toString(16):"-");return r}},150:function(t,r){var e;e=function(){return this}();try{e=e||new Function("return this")()}catch(t){"object"==typeof window&&(e=window)}t.exports=e},2:function(t,r,e){"use strict";e.r(r);var n=e(0),i=e(369),o=i.root.find("SphereObject"),s=i.root.find("Cube01"),a=i.root.find("plane0"),u=new n.a({x:0,y:-9.82,z:0});u.createObject(a,"ground",{body:{mass:0,transform:{position:{x:0,y:0,z:0}}}});var f={bodyA:u.createObject(o,"sphere",{body:{mass:1,radius:.01,transform:{position:{x:0,y:2,z:0}}}}),bodyB:u.createObject(s,"box",{body:{mass:5,transform:{scale:{x:.01,y:.01,z:.01},position:{x:0,y:10,z:0},rotation:{x:.2,y:.8,z:.3,w:0}}}})};u.createConstraint("point",f);u.start()},3:function(t,r,e){"use strict";(function(t){
+/*!
+ * The buffer module from node.js, for the browser.
+ *
+ * @author   Feross Aboukhadijeh <http://feross.org>
+ * @license  MIT
+ */
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diff --git a/examples/spark/src/index.js b/examples/spark/src/index.js
index abaf55d..8aae8a8 100644
--- a/examples/spark/src/index.js
+++ b/examples/spark/src/index.js
@@ -1,4 +1,3 @@
-
 import Physar from 'physar'
 
 const Scene = require('Scene');
@@ -62,5 +61,10 @@ physar.createObject(plane, 'ground', groundProps)
 const sphereID = physar.createObject(sphere, 'sphere', sphereProps)
 const boxID = physar.createObject(cube, 'box', cubeProps)
 
-const constraint = physar.addConstraint('point', sphereID, boxID)
+const constraintProps = {
+  bodyA: sphereID,
+  bodyB: boxID
+}
+
+const constraint = physar.createConstraint('point', constraintProps)
 physar.start()