!function(e,t){"object"==typeof exports&&"object"==typeof module?module.exports=t(require("babylonjs")):"function"==typeof define&&define.amd?define("babylonjs-loaders",["babylonjs"],t):"object"==typeof exports?exports["babylonjs-loaders"]=t(require("babylonjs")):e.LOADERS=t(e.BABYLON)}("undefined"!=typeof self?self:"undefined"!=typeof global?global:this,function(e){return function(e){var t={};function n(r){if(t[r])return t[r].exports;var o=t[r]={i:r,l:!1,exports:{}};return e[r].call(o.exports,o,o.exports,n),o.l=!0,o.exports}return n.m=e,n.c=t,n.d=function(e,t,r){n.o(e,t)||Object.defineProperty(e,t,{enumerable:!0,get:r})},n.r=function(e){"undefined"!=typeof Symbol&&Symbol.toStringTag&&Object.defineProperty(e,Symbol.toStringTag,{value:"Module"}),Object.defineProperty(e,"__esModule",{value:!0})},n.t=function(e,t){if(1&t&&(e=n(e)),8&t)return e;if(4&t&&"object"==typeof e&&e&&e.__esModule)return e;var r=Object.create(null);if(n.r(r),Object.defineProperty(r,"default",{enumerable:!0,value:e}),2&t&&"string"!=typeof e)for(var o in e)n.d(r,o,function(t){return e[t]}.bind(null,o));return r},n.n=function(e){var t=e&&e.__esModule?function(){return e.default}:function(){return e};return n.d(t,"a",t),t},n.o=function(e,t){return Object.prototype.hasOwnProperty.call(e,t)},n.p="",n(n.s=17)}([function(t,n){t.exports=e},function(e,t,n){"use strict";n.d(t,"a",function(){return a}),n.d(t,"b",function(){return i});var r=n(0),o=n(2),a=function(){function e(){}return e.Get=function(e,t,n){if(!t||null==n||!t[n])throw new Error(e+": Failed to find index ("+n+")");return t[n]},e.Assign=function(e){if(e)for(var t=0;t<e.length;t++)e[t].index=t},e}(),i=function(){function e(e){this._completePromises=new Array,this._disposed=!1,this._state=null,this._extensions={},this._defaultBabylonMaterialData={},this._requests=new Array,this._parent=e}return e.RegisterExtension=function(t,n){e.UnregisterExtension(t)&&r.Tools.Warn("Extension with the name '"+t+"' already exists"),e._ExtensionFactories[t]=n,e._ExtensionNames.push(t)},e.UnregisterExtension=function(t){if(!e._ExtensionFactories[t])return!1;delete e._ExtensionFactories[t];var n=e._ExtensionNames.indexOf(t);return-1!==n&&e._ExtensionNames.splice(n,1),!0},Object.defineProperty(e.prototype,"state",{get:function(){return this._state},enumerable:!0,configurable:!0}),Object.defineProperty(e.prototype,"gltf",{get:function(){return this._gltf},enumerable:!0,configurable:!0}),Object.defineProperty(e.prototype,"babylonScene",{get:function(){return this._babylonScene},enumerable:!0,configurable:!0}),Object.defineProperty(e.prototype,"rootBabylonMesh",{get:function(){return this._rootBabylonMesh},enumerable:!0,configurable:!0}),e.prototype.dispose=function(){if(!this._disposed){this._disposed=!0;for(var e=0,t=this._requests;e<t.length;e++){t[e].abort()}for(var n in this._requests.length=0,this._completePromises.length=0,this._extensions){this._extensions[n].dispose&&this._extensions[n].dispose()}this._extensions={},delete this._gltf,delete this._babylonScene,delete this._rootBabylonMesh,delete this._progressCallback,this._parent._clear()}},e.prototype.importMeshAsync=function(e,t,n,r,o,a){var i=this;return Promise.resolve().then(function(){i._babylonScene=t,i._rootUrl=r,i._fileName=a||"scene",i._progressCallback=o,i._loadData(n);var s=null;if(e){var l={};if(i._gltf.nodes)for(var u=0,c=i._gltf.nodes;u<c.length;u++){var f=c[u];f.name&&(l[f.name]=f.index)}s=(e instanceof Array?e:[e]).map(function(e){var t=l[e];if(void 0===t)throw new Error("Failed to find node '"+e+"'");return t})}return i._loadAsync(s,function(){return{meshes:i._getMeshes(),particleSystems:[],skeletons:i._getSkeletons(),animationGroups:i._getAnimationGroups()}})})},e.prototype.loadAsync=function(e,t,n,r,o){var a=this;return Promise.resolve().then(function(){return a._babylonScene=e,a._rootUrl=n,a._fileName=o||"scene",a._progressCallback=r,a._loadData(t),a._loadAsync(null,function(){})})},e.prototype._loadAsync=function(e,t){var n=this;return Promise.resolve().then(function(){n._uniqueRootUrl=-1===n._rootUrl.indexOf("file:")&&n._fileName?n._rootUrl:""+n._rootUrl+Date.now()+"/",n._loadExtensions(),n._checkExtensions();var i=o.GLTFLoaderState[o.GLTFLoaderState.LOADING]+" => "+o.GLTFLoaderState[o.GLTFLoaderState.READY],s=o.GLTFLoaderState[o.GLTFLoaderState.LOADING]+" => "+o.GLTFLoaderState[o.GLTFLoaderState.COMPLETE];n._parent._startPerformanceCounter(i),n._parent._startPerformanceCounter(s),n._setState(o.GLTFLoaderState.LOADING),n._extensionsOnLoading();var l=new Array;if(e)l.push(n.loadSceneAsync("/nodes",{nodes:e,index:-1}));else if(null!=n._gltf.scene||n._gltf.scenes&&n._gltf.scenes[0]){var u=a.Get("/scene",n._gltf.scenes,n._gltf.scene||0);l.push(n.loadSceneAsync("/scenes/"+u.index,u))}n._parent.compileMaterials&&l.push(n._compileMaterialsAsync()),n._parent.compileShadowGenerators&&l.push(n._compileShadowGeneratorsAsync());var c=Promise.all(l).then(function(){return n._rootBabylonMesh&&n._rootBabylonMesh.setEnabled(!0),n._setState(o.GLTFLoaderState.READY),n._extensionsOnReady(),n._startAnimations(),t()});return c.then(function(){n._parent._endPerformanceCounter(i),r.Tools.SetImmediate(function(){n._disposed||Promise.all(n._completePromises).then(function(){n._parent._endPerformanceCounter(s),n._setState(o.GLTFLoaderState.COMPLETE),n._parent.onCompleteObservable.notifyObservers(void 0),n._parent.onCompleteObservable.clear(),n.dispose()},function(e){n._parent.onErrorObservable.notifyObservers(e),n._parent.onErrorObservable.clear(),n.dispose()})})}),c},function(e){throw n._disposed||(n._parent.onErrorObservable.notifyObservers(e),n._parent.onErrorObservable.clear(),n.dispose()),e})},e.prototype._loadData=function(e){if(this._gltf=e.json,this._setupData(),e.bin){var t=this._gltf.buffers;if(t&&t[0]&&!t[0].uri){var n=t[0];(n.byteLength<e.bin.byteLength-3||n.byteLength>e.bin.byteLength)&&r.Tools.Warn("Binary buffer length ("+n.byteLength+") from JSON does not match chunk length ("+e.bin.byteLength+")"),n._data=Promise.resolve(e.bin)}else r.Tools.Warn("Unexpected BIN chunk")}},e.prototype._setupData=function(){if(a.Assign(this._gltf.accessors),a.Assign(this._gltf.animations),a.Assign(this._gltf.buffers),a.Assign(this._gltf.bufferViews),a.Assign(this._gltf.cameras),a.Assign(this._gltf.images),a.Assign(this._gltf.materials),a.Assign(this._gltf.meshes),a.Assign(this._gltf.nodes),a.Assign(this._gltf.samplers),a.Assign(this._gltf.scenes),a.Assign(this._gltf.skins),a.Assign(this._gltf.textures),this._gltf.nodes){for(var e={},t=0,n=this._gltf.nodes;t<n.length;t++){if((u=n[t]).children)for(var r=0,o=u.children;r<o.length;r++){e[o[r]]=u.index}}for(var i=this._createRootNode(),s=0,l=this._gltf.nodes;s<l.length;s++){var u,c=e[(u=l[s]).index];u.parent=void 0===c?i:this._gltf.nodes[c]}}},e.prototype._loadExtensions=function(){for(var t=0,n=e._ExtensionNames;t<n.length;t++){var r=n[t],o=e._ExtensionFactories[r](this);this._extensions[r]=o,this._parent.onExtensionLoadedObservable.notifyObservers(o)}this._parent.onExtensionLoadedObservable.clear()},e.prototype._checkExtensions=function(){if(this._gltf.extensionsRequired)for(var e=0,t=this._gltf.extensionsRequired;e<t.length;e++){var n=t[e],r=this._extensions[n];if(!r||!r.enabled)throw new Error("Require extension "+n+" is not available")}},e.prototype._setState=function(e){this._state=e,this.log(o.GLTFLoaderState[this._state])},e.prototype._createRootNode=function(){this._rootBabylonMesh=new r.Mesh("__root__",this._babylonScene),this._rootBabylonMesh.setEnabled(!1);var t={_babylonTransformNode:this._rootBabylonMesh,index:-1};switch(this._parent.coordinateSystemMode){case o.GLTFLoaderCoordinateSystemMode.AUTO:this._babylonScene.useRightHandedSystem||(t.rotation=[0,1,0,0],t.scale=[1,1,-1],e._LoadTransform(t,this._rootBabylonMesh));break;case o.GLTFLoaderCoordinateSystemMode.FORCE_RIGHT_HANDED:this._babylonScene.useRightHandedSystem=!0;break;default:throw new Error("Invalid coordinate system mode ("+this._parent.coordinateSystemMode+")")}return this._parent.onMeshLoadedObservable.notifyObservers(this._rootBabylonMesh),t},e.prototype.loadSceneAsync=function(e,t){var n=this,r=this._extensionsLoadSceneAsync(e,t);if(r)return r;var o=new Array;if(this.logOpen(e+" "+(t.name||"")),t.nodes)for(var i=0,s=t.nodes;i<s.length;i++){var l=s[i],u=a.Get(e+"/nodes/"+l,this._gltf.nodes,l);o.push(this.loadNodeAsync("/nodes/"+u.index,u,function(e){e.parent=n._rootBabylonMesh}))}if(this._gltf.nodes)for(var c=0,f=this._gltf.nodes;c<f.length;c++){if((u=f[c])._babylonTransformNode&&u._babylonBones)for(var d=0,h=u._babylonBones;d<h.length;d++){h[d].linkTransformNode(u._babylonTransformNode)}}return o.push(this._loadAnimationsAsync()),this.logClose(),Promise.all(o).then(function(){})},e.prototype._forEachPrimitive=function(e,t){if(e._primitiveBabylonMeshes)for(var n=0,r=e._primitiveBabylonMeshes;n<r.length;n++){t(r[n])}},e.prototype._getMeshes=function(){var e=new Array;e.push(this._rootBabylonMesh);var t=this._gltf.nodes;if(t)for(var n=0,r=t;n<r.length;n++){var o=r[n];this._forEachPrimitive(o,function(t){e.push(t)})}return e},e.prototype._getSkeletons=function(){var e=new Array,t=this._gltf.skins;if(t)for(var n=0,r=t;n<r.length;n++){var o=r[n];o._data&&e.push(o._data.babylonSkeleton)}return e},e.prototype._getAnimationGroups=function(){var e=new Array,t=this._gltf.animations;if(t)for(var n=0,r=t;n<r.length;n++){var o=r[n];o._babylonAnimationGroup&&e.push(o._babylonAnimationGroup)}return e},e.prototype._startAnimations=function(){switch(this._parent.animationStartMode){case o.GLTFLoaderAnimationStartMode.NONE:break;case o.GLTFLoaderAnimationStartMode.FIRST:0!==(e=this._getAnimationGroups()).length&&e[0].start(!0);break;case o.GLTFLoaderAnimationStartMode.ALL:for(var e,t=0,n=e=this._getAnimationGroups();t<n.length;t++){n[t].start(!0)}break;default:return void r.Tools.Error("Invalid animation start mode ("+this._parent.animationStartMode+")")}},e.prototype.loadNodeAsync=function(t,n,o){var i=this;void 0===o&&(o=function(){});var s=this._extensionsLoadNodeAsync(t,n,o);if(s)return s;if(n._babylonTransformNode)throw new Error(t+": Invalid recursive node hierarchy");var l=new Array;this.logOpen(t+" "+(n.name||""));var u=function(r){if(e.AddPointerMetadata(r,t),e._LoadTransform(n,r),null!=n.camera){var s=a.Get(t+"/camera",i._gltf.cameras,n.camera);l.push(i.loadCameraAsync("/cameras/"+s.index,s,function(e){e.parent=r}))}if(n.children)for(var u=0,c=n.children;u<c.length;u++){var f=c[u],d=a.Get(t+"/children/"+f,i._gltf.nodes,f);l.push(i.loadNodeAsync("/nodes/"+d.index,d,function(e){e.parent=r}))}o(r)};if(null==n.mesh){var c=n.name||"node"+n.index;n._babylonTransformNode=new r.TransformNode(c,this._babylonScene),u(n._babylonTransformNode)}else{var f=a.Get(t+"/mesh",this._gltf.meshes,n.mesh);l.push(this._loadMeshAsync("/meshes/"+f.index,n,f,u))}return this.logClose(),Promise.all(l).then(function(){return i._forEachPrimitive(n,function(e){e.refreshBoundingInfo(!0)}),n._babylonTransformNode})},e.prototype._loadMeshAsync=function(e,t,n,o){var i=n.primitives;if(!i||!i.length)throw new Error(e+": Primitives are missing");null==i[0].index&&a.Assign(i);var s=new Array;this.logOpen(e+" "+(n.name||""));var l=t.name||"node"+t.index;if(1===i.length){var u=n.primitives[0];s.push(this._loadMeshPrimitiveAsync(e+"/primitives/"+u.index,l,t,n,u,function(e){t._babylonTransformNode=e,t._primitiveBabylonMeshes=[e]}))}else{t._babylonTransformNode=new r.TransformNode(l,this._babylonScene),t._primitiveBabylonMeshes=[];for(var c=0,f=i;c<f.length;c++){u=f[c];s.push(this._loadMeshPrimitiveAsync(e+"/primitives/"+u.index,l+"_primitive"+u.index,t,n,u,function(e){e.parent=t._babylonTransformNode,t._primitiveBabylonMeshes.push(e)}))}}if(null!=t.skin){var d=a.Get(e+"/skin",this._gltf.skins,t.skin);s.push(this._loadSkinAsync("/skins/"+d.index,t,d))}return o(t._babylonTransformNode),this.logClose(),Promise.all(s).then(function(){return t._babylonTransformNode})},e.prototype._loadMeshPrimitiveAsync=function(t,n,o,i,s,l){var u=this;this.logOpen(""+t);var c,f,d=null==o.skin&&!i.primitives[0].targets,h=s._instanceData;if(d&&h)c=h.babylonSourceMesh.createInstance(n),f=h.promise;else{var p=new Array,_=new r.Mesh(n,this._babylonScene);this._createMorphTargets(t,o,i,s,_),p.push(this._loadVertexDataAsync(t,s,_).then(function(e){return u._loadMorphTargetsAsync(t,s,_,e).then(function(){e.applyToMesh(_)})}));var m=e._GetDrawMode(t,s.mode);if(null==s.material){var y=this._defaultBabylonMaterialData[m];y||(y=this._createDefaultMaterial("__GLTFLoader._default",m),this._parent.onMaterialLoadedObservable.notifyObservers(y),this._defaultBabylonMaterialData[m]=y),_.material=y}else{var A=a.Get(t+"/material",this._gltf.materials,s.material);p.push(this._loadMaterialAsync("/materials/"+A.index,A,_,m,function(e){_.material=e}))}f=Promise.all(p),d&&(s._instanceData={babylonSourceMesh:_,promise:f}),c=_}return e.AddPointerMetadata(c,t),this._parent.onMeshLoadedObservable.notifyObservers(c),l(c),this.logClose(),f.then(function(){return c})},e.prototype._loadVertexDataAsync=function(e,t,n){var o=this,i=this._extensionsLoadVertexDataAsync(e,t,n);if(i)return i;var s=t.attributes;if(!s)throw new Error(e+": Attributes are missing");var l=new Array,u=new r.Geometry(n.name,this._babylonScene);if(null==t.indices)n.isUnIndexed=!0;else{var c=a.Get(e+"/indices",this._gltf.accessors,t.indices);l.push(this._loadIndicesAccessorAsync("/accessors/"+c.index,c).then(function(e){u.setIndices(e)}))}var f=function(t,r,i){if(null!=s[t]){n._delayInfo=n._delayInfo||[],-1===n._delayInfo.indexOf(r)&&n._delayInfo.push(r);var c=a.Get(e+"/attributes/"+t,o._gltf.accessors,s[t]);l.push(o._loadVertexAccessorAsync("/accessors/"+c.index,c,r).then(function(e){u.setVerticesBuffer(e,c.count)})),i&&i(c)}};return f("POSITION",r.VertexBuffer.PositionKind),f("NORMAL",r.VertexBuffer.NormalKind),f("TANGENT",r.VertexBuffer.TangentKind),f("TEXCOORD_0",r.VertexBuffer.UVKind),f("TEXCOORD_1",r.VertexBuffer.UV2Kind),f("JOINTS_0",r.VertexBuffer.MatricesIndicesKind),f("WEIGHTS_0",r.VertexBuffer.MatricesWeightsKind),f("COLOR_0",r.VertexBuffer.ColorKind,function(e){"VEC4"===e.type&&(n.hasVertexAlpha=!0)}),Promise.all(l).then(function(){return u})},e.prototype._createMorphTargets=function(e,t,n,o,a){if(o.targets){if(null==t._numMorphTargets)t._numMorphTargets=o.targets.length;else if(o.targets.length!==t._numMorphTargets)throw new Error(e+": Primitives do not have the same number of targets");a.morphTargetManager=new r.MorphTargetManager;for(var i=0;i<o.targets.length;i++){var s=t.weights?t.weights[i]:n.weights?n.weights[i]:0;a.morphTargetManager.addTarget(new r.MorphTarget("morphTarget"+i,s))}}},e.prototype._loadMorphTargetsAsync=function(e,t,n,r){if(!t.targets)return Promise.resolve();for(var o=new Array,a=n.morphTargetManager,i=0;i<a.numTargets;i++){var s=a.getTarget(i);o.push(this._loadMorphTargetVertexDataAsync(e+"/targets/"+i,r,t.targets[i],s))}return Promise.all(o).then(function(){})},e.prototype._loadMorphTargetVertexDataAsync=function(e,t,n,o){var i=this,s=new Array,l=function(r,o,l){if(null!=n[r]){var u=t.getVertexBuffer(o);if(u){var c=a.Get(e+"/"+r,i._gltf.accessors,n[r]);s.push(i._loadFloatAccessorAsync("/accessors/"+c.index,c).then(function(e){l(u,e)}))}}};return l("POSITION",r.VertexBuffer.PositionKind,function(e,t){e.forEach(t.length,function(e,n){t[n]+=e}),o.setPositions(t)}),l("NORMAL",r.VertexBuffer.NormalKind,function(e,t){e.forEach(t.length,function(e,n){t[n]+=e}),o.setNormals(t)}),l("TANGENT",r.VertexBuffer.TangentKind,function(e,t){var n=0;e.forEach(t.length/3*4,function(e,r){(r+1)%4!=0&&(t[n++]+=e)}),o.setTangents(t)}),Promise.all(s).then(function(){})},e._LoadTransform=function(e,t){if(null==e.skin){var n=r.Vector3.Zero(),o=r.Quaternion.Identity(),a=r.Vector3.One();if(e.matrix)r.Matrix.FromArray(e.matrix).decompose(a,o,n);else e.translation&&(n=r.Vector3.FromArray(e.translation)),e.rotation&&(o=r.Quaternion.FromArray(e.rotation)),e.scale&&(a=r.Vector3.FromArray(e.scale));t.position=n,t.rotationQuaternion=o,t.scaling=a}},e.prototype._loadSkinAsync=function(e,t,n){var o=this,a=function(e){o._forEachPrimitive(t,function(t){t.skeleton=e})};if(n._data)return a(n._data.babylonSkeleton),n._data.promise;var i="skeleton"+n.index,s=new r.Skeleton(n.name||i,i,this._babylonScene);s.overrideMesh=this._rootBabylonMesh,this._loadBones(e,n,s),a(s);var l=this._loadSkinInverseBindMatricesDataAsync(e,n).then(function(e){o._updateBoneMatrices(s,e)});return n._data={babylonSkeleton:s,promise:l},l},e.prototype._loadBones=function(e,t,n){for(var r={},o=0,i=t.joints;o<i.length;o++){var s=i[o],l=a.Get(e+"/joints/"+s,this._gltf.nodes,s);this._loadBone(l,t,n,r)}},e.prototype._loadBone=function(e,t,n,o){var a=o[e.index];if(a)return a;var i=null;e.parent&&e.parent._babylonTransformNode!==this._rootBabylonMesh&&(i=this._loadBone(e.parent,t,n,o));var s=t.joints.indexOf(e.index);return a=new r.Bone(e.name||"joint"+e.index,n,i,this._getNodeMatrix(e),null,null,s),o[e.index]=a,e._babylonBones=e._babylonBones||[],e._babylonBones.push(a),a},e.prototype._loadSkinInverseBindMatricesDataAsync=function(e,t){if(null==t.inverseBindMatrices)return Promise.resolve(null);var n=a.Get(e+"/inverseBindMatrices",this._gltf.accessors,t.inverseBindMatrices);return this._loadFloatAccessorAsync("/accessors/"+n.index,n)},e.prototype._updateBoneMatrices=function(e,t){for(var n=0,o=e.bones;n<o.length;n++){var a=o[n],i=r.Matrix.Identity(),s=a._index;t&&-1!==s&&(r.Matrix.FromArrayToRef(t,16*s,i),i.invertToRef(i));var l=a.getParent();l&&i.multiplyToRef(l.getInvertedAbsoluteTransform(),i),a.updateMatrix(i,!1,!1),a._updateDifferenceMatrix(void 0,!1)}},e.prototype._getNodeMatrix=function(e){return e.matrix?r.Matrix.FromArray(e.matrix):r.Matrix.Compose(e.scale?r.Vector3.FromArray(e.scale):r.Vector3.One(),e.rotation?r.Quaternion.FromArray(e.rotation):r.Quaternion.Identity(),e.translation?r.Vector3.FromArray(e.translation):r.Vector3.Zero())},e.prototype.loadCameraAsync=function(t,n,o){void 0===o&&(o=function(){});var a=this._extensionsLoadCameraAsync(t,n,o);if(a)return a;var i=new Array;this.logOpen(t+" "+(n.name||""));var s=new r.FreeCamera(n.name||"camera"+n.index,r.Vector3.Zero(),this._babylonScene,!1);switch(s.rotation=new r.Vector3(0,Math.PI,0),n.type){case"perspective":var l=n.perspective;if(!l)throw new Error(t+": Camera perspective properties are missing");s.fov=l.yfov,s.minZ=l.znear,s.maxZ=l.zfar||Number.MAX_VALUE;break;case"orthographic":if(!n.orthographic)throw new Error(t+": Camera orthographic properties are missing");s.mode=r.Camera.ORTHOGRAPHIC_CAMERA,s.orthoLeft=-n.orthographic.xmag,s.orthoRight=n.orthographic.xmag,s.orthoBottom=-n.orthographic.ymag,s.orthoTop=n.orthographic.ymag,s.minZ=n.orthographic.znear,s.maxZ=n.orthographic.zfar;break;default:throw new Error(t+": Invalid camera type ("+n.type+")")}return e.AddPointerMetadata(s,t),this._parent.onCameraLoadedObservable.notifyObservers(s),o(s),Promise.all(i).then(function(){return s})},e.prototype._loadAnimationsAsync=function(){var e=this._gltf.animations;if(!e)return Promise.resolve();for(var t=new Array,n=0;n<e.length;n++){var r=e[n];t.push(this.loadAnimationAsync("/animations/"+r.index,r))}return Promise.all(t).then(function(){})},e.prototype.loadAnimationAsync=function(e,t){var n=this._extensionsLoadAnimationAsync(e,t);if(n)return n;var o=new r.AnimationGroup(t.name||"animation"+t.index,this._babylonScene);t._babylonAnimationGroup=o;var i=new Array;a.Assign(t.channels),a.Assign(t.samplers);for(var s=0,l=t.channels;s<l.length;s++){var u=l[s];i.push(this._loadAnimationChannelAsync(e+"/channels/"+u.index,e,t,u,o))}return Promise.all(i).then(function(){return o.normalize(0),o})},e.prototype._loadAnimationChannelAsync=function(e,t,n,o,i){var s=this;if(null==o.target.node)return Promise.resolve();var l=a.Get(e+"/target/node",this._gltf.nodes,o.target.node);if("weights"===o.target.path&&!l._numMorphTargets||"weights"!==o.target.path&&!l._babylonTransformNode)return Promise.resolve();var u=a.Get(e+"/sampler",n.samplers,o.sampler);return this._loadAnimationSamplerAsync(t+"/samplers/"+o.sampler,u).then(function(t){var n,a;switch(o.target.path){case"translation":n="position",a=r.Animation.ANIMATIONTYPE_VECTOR3;break;case"rotation":n="rotationQuaternion",a=r.Animation.ANIMATIONTYPE_QUATERNION;break;case"scale":n="scaling",a=r.Animation.ANIMATIONTYPE_VECTOR3;break;case"weights":n="influence",a=r.Animation.ANIMATIONTYPE_FLOAT;break;default:throw new Error(e+"/target/path: Invalid value ("+o.target.path+")")}var u,c,f=0;switch(n){case"position":u=function(){var e=r.Vector3.FromArray(t.output,f);return f+=3,e};break;case"rotationQuaternion":u=function(){var e=r.Quaternion.FromArray(t.output,f);return f+=4,e};break;case"scaling":u=function(){var e=r.Vector3.FromArray(t.output,f);return f+=3,e};break;case"influence":u=function(){for(var e=new Array(l._numMorphTargets),n=0;n<l._numMorphTargets;n++)e[n]=t.output[f++];return e}}switch(t.interpolation){case"STEP":c=function(e){return{frame:t.input[e],value:u(),interpolation:r.AnimationKeyInterpolation.STEP}};break;case"LINEAR":c=function(e){return{frame:t.input[e],value:u()}};break;case"CUBICSPLINE":c=function(e){return{frame:t.input[e],inTangent:u(),value:u(),outTangent:u()}}}for(var d=new Array(t.input.length),h=0;h<t.input.length;h++)d[h]=c(h);if("influence"===n)for(var p=function(e){var t=i.name+"_channel"+i.targetedAnimations.length,o=new r.Animation(t,n,1,a);o.setKeys(d.map(function(t){return{frame:t.frame,inTangent:t.inTangent?t.inTangent[e]:void 0,value:t.value[e],outTangent:t.outTangent?t.outTangent[e]:void 0}})),s._forEachPrimitive(l,function(t){var n=t.morphTargetManager.getTarget(e),r=o.clone();n.animations.push(r),i.addTargetedAnimation(r,n)})},_=0;_<l._numMorphTargets;_++)p(_);else{var m=i.name+"_channel"+i.targetedAnimations.length,y=new r.Animation(m,n,1,a);y.setKeys(d),l._babylonTransformNode.animations.push(y),i.addTargetedAnimation(y,l._babylonTransformNode)}})},e.prototype._loadAnimationSamplerAsync=function(e,t){if(t._data)return t._data;var n=t.interpolation||"LINEAR";switch(n){case"STEP":case"LINEAR":case"CUBICSPLINE":break;default:throw new Error(e+"/interpolation: Invalid value ("+t.interpolation+")")}var r=a.Get(e+"/input",this._gltf.accessors,t.input),o=a.Get(e+"/output",this._gltf.accessors,t.output);return t._data=Promise.all([this._loadFloatAccessorAsync("/accessors/"+r.index,r),this._loadFloatAccessorAsync("/accessors/"+o.index,o)]).then(function(e){var t=e[0],r=e[1];return{input:t,interpolation:n,output:r}}),t._data},e.prototype._loadBufferAsync=function(e,t){if(t._data)return t._data;if(!t.uri)throw new Error(e+"/uri: Value is missing");return t._data=this.loadUriAsync(e+"/uri",t,t.uri),t._data},e.prototype.loadBufferViewAsync=function(e,t){if(t._data)return t._data;var n=a.Get(e+"/buffer",this._gltf.buffers,t.buffer);return t._data=this._loadBufferAsync("/buffers/"+n.index,n).then(function(n){try{return new Uint8Array(n.buffer,n.byteOffset+(t.byteOffset||0),t.byteLength)}catch(t){throw new Error(e+": "+t.message)}}),t._data},e.prototype._loadIndicesAccessorAsync=function(t,n){if("SCALAR"!==n.type)throw new Error(t+"/type: Invalid value "+n.type);if(5121!==n.componentType&&5123!==n.componentType&&5125!==n.componentType)throw new Error(t+"/componentType: Invalid value "+n.componentType);if(n._data)return n._data;var r=a.Get(t+"/bufferView",this._gltf.bufferViews,n.bufferView);return n._data=this.loadBufferViewAsync("/bufferViews/"+r.index,r).then(function(r){return e._GetTypedArray(t,n.componentType,r,n.byteOffset,n.count)}),n._data},e.prototype._loadFloatAccessorAsync=function(t,n){var r=this;if(5126!==n.componentType)throw new Error("Invalid component type "+n.componentType);if(n._data)return n._data;var o=e._GetNumComponents(t,n.type),i=o*n.count;if(null==n.bufferView)n._data=Promise.resolve(new Float32Array(i));else{var s=a.Get(t+"/bufferView",this._gltf.bufferViews,n.bufferView);n._data=this.loadBufferViewAsync("/bufferViews/"+s.index,s).then(function(r){return e._GetTypedArray(t,n.componentType,r,n.byteOffset,i)})}if(n.sparse){var l=n.sparse;n._data=n._data.then(function(i){var s=i,u=a.Get(t+"/sparse/indices/bufferView",r._gltf.bufferViews,l.indices.bufferView),c=a.Get(t+"/sparse/values/bufferView",r._gltf.bufferViews,l.values.bufferView);return Promise.all([r.loadBufferViewAsync("/bufferViews/"+u.index,u),r.loadBufferViewAsync("/bufferViews/"+c.index,c)]).then(function(r){for(var a=r[0],i=r[1],u=e._GetTypedArray(t+"/sparse/indices",l.indices.componentType,a,l.indices.byteOffset,l.count),c=e._GetTypedArray(t+"/sparse/values",n.componentType,i,l.values.byteOffset,o*l.count),f=0,d=0;d<u.length;d++)for(var h=u[d]*o,p=0;p<o;p++)s[h++]=c[f++];return s})})}return n._data},e.prototype._loadVertexBufferViewAsync=function(e,t){var n=this;return e._babylonBuffer?e._babylonBuffer:(e._babylonBuffer=this.loadBufferViewAsync("/bufferViews/"+e.index,e).then(function(e){return new r.Buffer(n._babylonScene.getEngine(),e,!1)}),e._babylonBuffer)},e.prototype._loadVertexAccessorAsync=function(t,n,o){var i=this;if(n._babylonVertexBuffer)return n._babylonVertexBuffer;if(n.sparse)n._babylonVertexBuffer=this._loadFloatAccessorAsync("/accessors/"+n.index,n).then(function(e){return new r.VertexBuffer(i._babylonScene.getEngine(),e,o,!1)});else if(n.byteOffset&&n.byteOffset%r.VertexBuffer.GetTypeByteLength(n.componentType)!=0)r.Tools.Warn("Accessor byte offset is not a multiple of component type byte length"),n._babylonVertexBuffer=this._loadFloatAccessorAsync("/accessors/"+n.index,n).then(function(e){return new r.VertexBuffer(i._babylonScene.getEngine(),e,o,!1)});else{var s=a.Get(t+"/bufferView",this._gltf.bufferViews,n.bufferView);n._babylonVertexBuffer=this._loadVertexBufferViewAsync(s,o).then(function(a){var l=e._GetNumComponents(t,n.type);return new r.VertexBuffer(i._babylonScene.getEngine(),a,o,!1,!1,s.byteStride,!1,n.byteOffset,l,n.componentType,n.normalized,!0)})}return n._babylonVertexBuffer},e.prototype._loadMaterialMetallicRoughnessPropertiesAsync=function(e,t,n){if(!(n instanceof r.PBRMaterial))throw new Error(e+": Material type not supported");var o=new Array;return t&&(t.baseColorFactor?(n.albedoColor=r.Color3.FromArray(t.baseColorFactor),n.alpha=t.baseColorFactor[3]):n.albedoColor=r.Color3.White(),n.metallic=null==t.metallicFactor?1:t.metallicFactor,n.roughness=null==t.roughnessFactor?1:t.roughnessFactor,t.baseColorTexture&&o.push(this.loadTextureInfoAsync(e+"/baseColorTexture",t.baseColorTexture,function(e){e.name=n.name+" (Base Color)",n.albedoTexture=e})),t.metallicRoughnessTexture&&(o.push(this.loadTextureInfoAsync(e+"/metallicRoughnessTexture",t.metallicRoughnessTexture,function(e){e.name=n.name+" (Metallic Roughness)",n.metallicTexture=e})),n.useMetallnessFromMetallicTextureBlue=!0,n.useRoughnessFromMetallicTextureGreen=!0,n.useRoughnessFromMetallicTextureAlpha=!1)),Promise.all(o).then(function(){})},e.prototype._loadMaterialAsync=function(t,n,r,o,a){void 0===a&&(a=function(){});var i=this._extensionsLoadMaterialAsync(t,n,r,o,a);if(i)return i;n._data=n._data||{};var s=n._data[o];if(!s){this.logOpen(t+" "+(n.name||""));var l=this.createMaterial(t,n,o);s={babylonMaterial:l,babylonMeshes:[],promise:this.loadMaterialPropertiesAsync(t,n,l)},n._data[o]=s,e.AddPointerMetadata(l,t),this._parent.onMaterialLoadedObservable.notifyObservers(l),this.logClose()}return s.babylonMeshes.push(r),r.onDisposeObservable.addOnce(function(){var e=s.babylonMeshes.indexOf(r);-1!==e&&s.babylonMeshes.splice(e,1)}),a(s.babylonMaterial),s.promise.then(function(){return s.babylonMaterial})},e.prototype._createDefaultMaterial=function(e,t){var n=new r.PBRMaterial(e,this._babylonScene);return n.sideOrientation=this._babylonScene.useRightHandedSystem?r.Material.CounterClockWiseSideOrientation:r.Material.ClockWiseSideOrientation,n.fillMode=t,n.enableSpecularAntiAliasing=!0,n.useRadianceOverAlpha=!this._parent.transparencyAsCoverage,n.useSpecularOverAlpha=!this._parent.transparencyAsCoverage,n.transparencyMode=r.PBRMaterial.PBRMATERIAL_OPAQUE,n.metallic=1,n.roughness=1,n},e.prototype.createMaterial=function(e,t,n){var r=this._extensionsCreateMaterial(e,t,n);if(r)return r;var o=t.name||"material"+t.index;return this._createDefaultMaterial(o,n)},e.prototype.loadMaterialPropertiesAsync=function(e,t,n){var r=this._extensionsLoadMaterialPropertiesAsync(e,t,n);if(r)return r;var o=new Array;return o.push(this.loadMaterialBasePropertiesAsync(e,t,n)),t.pbrMetallicRoughness&&o.push(this._loadMaterialMetallicRoughnessPropertiesAsync(e+"/pbrMetallicRoughness",t.pbrMetallicRoughness,n)),this.loadMaterialAlphaProperties(e,t,n),Promise.all(o).then(function(){})},e.prototype.loadMaterialBasePropertiesAsync=function(e,t,n){if(!(n instanceof r.PBRMaterial))throw new Error(e+": Material type not supported");var o=new Array;return n.emissiveColor=t.emissiveFactor?r.Color3.FromArray(t.emissiveFactor):new r.Color3(0,0,0),t.doubleSided&&(n.backFaceCulling=!1,n.twoSidedLighting=!0),t.normalTexture&&(o.push(this.loadTextureInfoAsync(e+"/normalTexture",t.normalTexture,function(e){e.name=n.name+" (Normal)",n.bumpTexture=e})),n.invertNormalMapX=!this._babylonScene.useRightHandedSystem,n.invertNormalMapY=this._babylonScene.useRightHandedSystem,null!=t.normalTexture.scale&&(n.bumpTexture.level=t.normalTexture.scale),n.forceIrradianceInFragment=!0),t.occlusionTexture&&(o.push(this.loadTextureInfoAsync(e+"/occlusionTexture",t.occlusionTexture,function(e){e.name=n.name+" (Occlusion)",n.ambientTexture=e})),n.useAmbientInGrayScale=!0,null!=t.occlusionTexture.strength&&(n.ambientTextureStrength=t.occlusionTexture.strength)),t.emissiveTexture&&o.push(this.loadTextureInfoAsync(e+"/emissiveTexture",t.emissiveTexture,function(e){e.name=n.name+" (Emissive)",n.emissiveTexture=e})),Promise.all(o).then(function(){})},e.prototype.loadMaterialAlphaProperties=function(e,t,n){if(!(n instanceof r.PBRMaterial))throw new Error(e+": Material type not supported");switch(t.alphaMode||"OPAQUE"){case"OPAQUE":n.transparencyMode=r.PBRMaterial.PBRMATERIAL_OPAQUE;break;case"MASK":n.transparencyMode=r.PBRMaterial.PBRMATERIAL_ALPHATEST,n.alphaCutOff=null==t.alphaCutoff?.5:t.alphaCutoff,n.albedoTexture&&(n.albedoTexture.hasAlpha=!0);break;case"BLEND":n.transparencyMode=r.PBRMaterial.PBRMATERIAL_ALPHABLEND,n.albedoTexture&&(n.albedoTexture.hasAlpha=!0,n.useAlphaFromAlbedoTexture=!0);break;default:throw new Error(e+"/alphaMode: Invalid value ("+t.alphaMode+")")}},e.prototype.loadTextureInfoAsync=function(t,n,r){var o=this;void 0===r&&(r=function(){});var i=this._extensionsLoadTextureInfoAsync(t,n,r);if(i)return i;this.logOpen(""+t);var s=a.Get(t+"/index",this._gltf.textures,n.index),l=this._loadTextureAsync("/textures/"+n.index,s,function(a){a.coordinatesIndex=n.texCoord||0,e.AddPointerMetadata(a,t),o._parent.onTextureLoadedObservable.notifyObservers(a),r(a)});return this.logClose(),l},e.prototype._loadTextureAsync=function(t,n,o){var i=this;void 0===o&&(o=function(){});var s=new Array;this.logOpen(t+" "+(n.name||""));var l=null==n.sampler?e._DefaultSampler:a.Get(t+"/sampler",this._gltf.samplers,n.sampler),u=this._loadSampler("/samplers/"+l.index,l),c=a.Get(t+"/source",this._gltf.images,n.source),f=null;c.uri&&(r.Tools.IsBase64(c.uri)?f=c.uri:this._babylonScene.getEngine().textureFormatInUse&&(f=this._rootUrl+c.uri));var d=new r.Deferred,h=new r.Texture(f,this._babylonScene,u.noMipMaps,!1,u.samplingMode,function(){i._disposed||d.resolve()},function(e,n){i._disposed||d.reject(new Error(t+": "+(n&&n.message?n.message:e||"Failed to load texture")))});return s.push(d.promise),f||s.push(this.loadImageAsync("/images/"+c.index,c).then(function(e){var t=c.uri||i._fileName+"#image"+c.index,n="data:"+i._uniqueRootUrl+t;h.updateURL(n,new Blob([e],{type:c.mimeType}))})),h.wrapU=u.wrapU,h.wrapV=u.wrapV,o(h),this.logClose(),Promise.all(s).then(function(){return h})},e.prototype._loadSampler=function(t,n){return n._data||(n._data={noMipMaps:9728===n.minFilter||9729===n.minFilter,samplingMode:e._GetTextureSamplingMode(t,n),wrapU:e._GetTextureWrapMode(t+"/wrapS",n.wrapS),wrapV:e._GetTextureWrapMode(t+"/wrapT",n.wrapT)}),n._data},e.prototype.loadImageAsync=function(e,t){if(!t._data){if(this.logOpen(e+" "+(t.name||"")),t.uri)t._data=this.loadUriAsync(e+"/uri",t,t.uri);else{var n=a.Get(e+"/bufferView",this._gltf.bufferViews,t.bufferView);t._data=this.loadBufferViewAsync("/bufferViews/"+n.index,n)}this.logClose()}return t._data},e.prototype.loadUriAsync=function(t,n,a){var i=this,s=this._extensionsLoadUriAsync(t,n,a);if(s)return s;if(!e._ValidateUri(a))throw new Error(t+": '"+a+"' is invalid");if(r.Tools.IsBase64(a)){var l=new Uint8Array(r.Tools.DecodeBase64(a));return this.log("Decoded "+a.substr(0,64)+"... ("+l.length+" bytes)"),Promise.resolve(l)}return this.log("Loading "+a),this._parent.preprocessUrlAsync(this._rootUrl+a).then(function(e){return new Promise(function(n,s){if(!i._disposed){var l=r.Tools.LoadFile(e,function(e){if(!i._disposed){var t=new Uint8Array(e);i.log("Loaded "+a+" ("+t.length+" bytes)"),n(t)}},function(e){if(!i._disposed&&(l&&(l._lengthComputable=e.lengthComputable,l._loaded=e.loaded,l._total=e.total),i._state===o.GLTFLoaderState.LOADING))try{i._onProgress()}catch(e){s(e)}},i._babylonScene.offlineProvider,!0,function(e,n){i._disposed||s(new r.LoadFileError(t+": Failed to load '"+a+"'"+(e?": "+e.status+" "+e.statusText:""),e))});i._requests.push(l)}})})},e.prototype._onProgress=function(){if(this._progressCallback){for(var e=!0,t=0,n=0,o=0,a=this._requests;o<a.length;o++){var i=a[o];if(void 0===i._lengthComputable||void 0===i._loaded||void 0===i._total)return;e=e&&i._lengthComputable,t+=i._loaded,n+=i._total}this._progressCallback(new r.SceneLoaderProgressEvent(e,t,e?n:0))}},e.AddPointerMetadata=function(e,t){var n=e.metadata=e.metadata||{},r=n.gltf=n.gltf||{};(r.pointers=r.pointers||[]).push(t)},e._GetTextureWrapMode=function(e,t){switch(t=null==t?10497:t){case 33071:return r.Texture.CLAMP_ADDRESSMODE;case 33648:return r.Texture.MIRROR_ADDRESSMODE;case 10497:return r.Texture.WRAP_ADDRESSMODE;default:return r.Tools.Warn(e+": Invalid value ("+t+")"),r.Texture.WRAP_ADDRESSMODE}},e._GetTextureSamplingMode=function(e,t){var n=null==t.magFilter?9729:t.magFilter,o=null==t.minFilter?9987:t.minFilter;if(9729===n)switch(o){case 9728:return r.Texture.LINEAR_NEAREST;case 9729:return r.Texture.LINEAR_LINEAR;case 9984:return r.Texture.LINEAR_NEAREST_MIPNEAREST;case 9985:return r.Texture.LINEAR_LINEAR_MIPNEAREST;case 9986:return r.Texture.LINEAR_NEAREST_MIPLINEAR;case 9987:return r.Texture.LINEAR_LINEAR_MIPLINEAR;default:return r.Tools.Warn(e+"/minFilter: Invalid value ("+o+")"),r.Texture.LINEAR_LINEAR_MIPLINEAR}else switch(9728!==n&&r.Tools.Warn(e+"/magFilter: Invalid value ("+n+")"),o){case 9728:return r.Texture.NEAREST_NEAREST;case 9729:return r.Texture.NEAREST_LINEAR;case 9984:return r.Texture.NEAREST_NEAREST_MIPNEAREST;case 9985:return r.Texture.NEAREST_LINEAR_MIPNEAREST;case 9986:return r.Texture.NEAREST_NEAREST_MIPLINEAR;case 9987:return r.Texture.NEAREST_LINEAR_MIPLINEAR;default:return r.Tools.Warn(e+"/minFilter: Invalid value ("+o+")"),r.Texture.NEAREST_NEAREST_MIPNEAREST}},e._GetTypedArray=function(e,t,n,r,o){var a=n.buffer;r=n.byteOffset+(r||0);try{switch(t){case 5120:return new Int8Array(a,r,o);case 5121:return new Uint8Array(a,r,o);case 5122:return new Int16Array(a,r,o);case 5123:return new Uint16Array(a,r,o);case 5125:return new Uint32Array(a,r,o);case 5126:return new Float32Array(a,r,o);default:throw new Error("Invalid component type "+t)}}catch(t){throw new Error(e+": "+t)}},e._GetNumComponents=function(e,t){switch(t){case"SCALAR":return 1;case"VEC2":return 2;case"VEC3":return 3;case"VEC4":case"MAT2":return 4;case"MAT3":return 9;case"MAT4":return 16}throw new Error(e+": Invalid type ("+t+")")},e._ValidateUri=function(e){return r.Tools.IsBase64(e)||-1===e.indexOf("..")},e._GetDrawMode=function(e,t){switch(null==t&&(t=4),t){case 0:return r.Material.PointListDrawMode;case 1:return r.Material.LineListDrawMode;case 2:return r.Material.LineLoopDrawMode;case 3:return r.Material.LineStripDrawMode;case 4:return r.Material.TriangleFillMode;case 5:return r.Material.TriangleStripDrawMode;case 6:return r.Material.TriangleFanDrawMode}throw new Error(e+": Invalid mesh primitive mode ("+t+")")},e.prototype._compileMaterialsAsync=function(){var e=this;this._parent._startPerformanceCounter("Compile materials");var t=new Array;if(this._gltf.materials)for(var n=0,r=this._gltf.materials;n<r.length;n++){var o=r[n];if(o._data)for(var a in o._data)for(var i=o._data[a],s=0,l=i.babylonMeshes;s<l.length;s++){var u=l[s];u.computeWorldMatrix(!0);var c=i.babylonMaterial;t.push(c.forceCompilationAsync(u)),this._parent.useClipPlane&&t.push(c.forceCompilationAsync(u,{clipPlane:!0}))}}return Promise.all(t).then(function(){e._parent._endPerformanceCounter("Compile materials")})},e.prototype._compileShadowGeneratorsAsync=function(){var e=this;this._parent._startPerformanceCounter("Compile shadow generators");for(var t=new Array,n=0,r=this._babylonScene.lights;n<r.length;n++){var o=r[n].getShadowGenerator();o&&t.push(o.forceCompilationAsync())}return Promise.all(t).then(function(){e._parent._endPerformanceCounter("Compile shadow generators")})},e.prototype._forEachExtensions=function(t){for(var n=0,r=e._ExtensionNames;n<r.length;n++){var o=r[n],a=this._extensions[o];a.enabled&&t(a)}},e.prototype._applyExtensions=function(t,n,r){for(var o=0,a=e._ExtensionNames;o<a.length;o++){var i=a[o],s=this._extensions[i];if(s.enabled){var l=i+"."+n,u=t;u._activeLoaderExtensionFunctions=u._activeLoaderExtensionFunctions||{};var c=u._activeLoaderExtensionFunctions;if(!c[l]){c[l]=!0;try{var f=r(s);if(f)return f}finally{delete c[l]}}}}return null},e.prototype._extensionsOnLoading=function(){this._forEachExtensions(function(e){return e.onLoading&&e.onLoading()})},e.prototype._extensionsOnReady=function(){this._forEachExtensions(function(e){return e.onReady&&e.onReady()})},e.prototype._extensionsLoadSceneAsync=function(e,t){return this._applyExtensions(t,"loadScene",function(n){return n.loadSceneAsync&&n.loadSceneAsync(e,t)})},e.prototype._extensionsLoadNodeAsync=function(e,t,n){return this._applyExtensions(t,"loadNode",function(r){return r.loadNodeAsync&&r.loadNodeAsync(e,t,n)})},e.prototype._extensionsLoadCameraAsync=function(e,t,n){return this._applyExtensions(t,"loadCamera",function(r){return r.loadCameraAsync&&r.loadCameraAsync(e,t,n)})},e.prototype._extensionsLoadVertexDataAsync=function(e,t,n){return this._applyExtensions(t,"loadVertexData",function(r){return r._loadVertexDataAsync&&r._loadVertexDataAsync(e,t,n)})},e.prototype._extensionsLoadMaterialAsync=function(e,t,n,r,o){return this._applyExtensions(t,"loadMaterial",function(a){return a._loadMaterialAsync&&a._loadMaterialAsync(e,t,n,r,o)})},e.prototype._extensionsCreateMaterial=function(e,t,n){return this._applyExtensions(t,"createMaterial",function(r){return r.createMaterial&&r.createMaterial(e,t,n)})},e.prototype._extensionsLoadMaterialPropertiesAsync=function(e,t,n){return this._applyExtensions(t,"loadMaterialProperties",function(r){return r.loadMaterialPropertiesAsync&&r.loadMaterialPropertiesAsync(e,t,n)})},e.prototype._extensionsLoadTextureInfoAsync=function(e,t,n){return this._applyExtensions(t,"loadTextureInfo",function(r){return r.loadTextureInfoAsync&&r.loadTextureInfoAsync(e,t,n)})},e.prototype._extensionsLoadAnimationAsync=function(e,t){return this._applyExtensions(t,"loadAnimation",function(n){return n.loadAnimationAsync&&n.loadAnimationAsync(e,t)})},e.prototype._extensionsLoadUriAsync=function(e,t,n){return this._applyExtensions(t,"loadUri",function(r){return r._loadUriAsync&&r._loadUriAsync(e,t,n)})},e.LoadExtensionAsync=function(e,t,n,r){if(!t.extensions)return null;var o=t.extensions[n];return o?r(e+"/extensions/"+n,o):null},e.LoadExtraAsync=function(e,t,n,r){if(!t.extras)return null;var o=t.extras[n];return o?r(e+"/extras/"+n,o):null},e.prototype.logOpen=function(e){this._parent._logOpen(e)},e.prototype.logClose=function(){this._parent._logClose()},e.prototype.log=function(e){this._parent._log(e)},e.prototype.startPerformanceCounter=function(e){this._parent._startPerformanceCounter(e)},e.prototype.endPerformanceCounter=function(e){this._parent._endPerformanceCounter(e)},e._DefaultSampler={index:-1},e._ExtensionNames=new Array,e._ExtensionFactories={},e}();o.GLTFFileLoader._CreateGLTF2Loader=function(e){return new i(e)}},function(e,t,n){"use 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i.Observable,this.onCompleteObservable=new i.Observable,this.onErrorObservable=new i.Observable,this.onDisposeObservable=new i.Observable,this.onExtensionLoadedObservable=new i.Observable,this.validate=!1,this.onValidatedObservable=new i.Observable,this._loader=null,this.name="gltf",this.extensions={".gltf":{isBinary:!1},".glb":{isBinary:!0}},this._logIndentLevel=0,this._loggingEnabled=!1,this._log=this._logDisabled,this._capturePerformanceCounters=!1,this._startPerformanceCounter=this._startPerformanceCounterDisabled,this._endPerformanceCounter=this._endPerformanceCounterDisabled}return Object.defineProperty(e.prototype,"onParsed",{set:function(e){this._onParsedObserver&&this.onParsedObservable.remove(this._onParsedObserver),this._onParsedObserver=this.onParsedObservable.add(e)},enumerable:!0,configurable:!0}),Object.defineProperty(e.prototype,"onMeshLoaded",{set:function(e){this._onMeshLoadedObserver&&this.onMeshLoadedObservable.remove(this._onMeshLoadedObserver),this._onMeshLoadedObserver=this.onMeshLoadedObservable.add(e)},enumerable:!0,configurable:!0}),Object.defineProperty(e.prototype,"onTextureLoaded",{set:function(e){this._onTextureLoadedObserver&&this.onTextureLoadedObservable.remove(this._onTextureLoadedObserver),this._onTextureLoadedObserver=this.onTextureLoadedObservable.add(e)},enumerable:!0,configurable:!0}),Object.defineProperty(e.prototype,"onMaterialLoaded",{set:function(e){this._onMaterialLoadedObserver&&this.onMaterialLoadedObservable.remove(this._onMaterialLoadedObserver),this._onMaterialLoadedObserver=this.onMaterialLoadedObservable.add(e)},enumerable:!0,configurable:!0}),Object.defineProperty(e.prototype,"onCameraLoaded",{set:function(e){this._onCameraLoadedObserver&&this.onCameraLoadedObservable.remove(this._onCameraLoadedObserver),this._onCameraLoadedObserver=this.onCameraLoadedObservable.add(e)},enumerable:!0,configurable:!0}),Object.defineProperty(e.prototype,"onComplete",{set:function(e){this._onCompleteObserver&&this.onCompleteObservable.remove(this._onCompleteObserver),this._onCompleteObserver=this.onCompleteObservable.add(e)},enumerable:!0,configurable:!0}),Object.defineProperty(e.prototype,"onError",{set:function(e){this._onErrorObserver&&this.onErrorObservable.remove(this._onErrorObserver),this._onErrorObserver=this.onErrorObservable.add(e)},enumerable:!0,configurable:!0}),Object.defineProperty(e.prototype,"onDispose",{set:function(e){this._onDisposeObserver&&this.onDisposeObservable.remove(this._onDisposeObserver),this._onDisposeObserver=this.onDisposeObservable.add(e)},enumerable:!0,configurable:!0}),Object.defineProperty(e.prototype,"onExtensionLoaded",{set:function(e){this._onExtensionLoadedObserver&&this.onExtensionLoadedObservable.remove(this._onExtensionLoadedObserver),this._onExtensionLoadedObserver=this.onExtensionLoadedObservable.add(e)},enumerable:!0,configurable:!0}),Object.defineProperty(e.prototype,"loggingEnabled",{get:function(){return this._loggingEnabled},set:function(e){this._loggingEnabled!==e&&(this._loggingEnabled=e,this._loggingEnabled?this._log=this._logEnabled:this._log=this._logDisabled)},enumerable:!0,configurable:!0}),Object.defineProperty(e.prototype,"capturePerformanceCounters",{get:function(){return this._capturePerformanceCounters},set:function(e){this._capturePerformanceCounters!==e&&(this._capturePerformanceCounters=e,this._capturePerformanceCounters?(this._startPerformanceCounter=this._startPerformanceCounterEnabled,this._endPerformanceCounter=this._endPerformanceCounterEnabled):(this._startPerformanceCounter=this._startPerformanceCounterDisabled,this._endPerformanceCounter=this._endPerformanceCounterDisabled))},enumerable:!0,configurable:!0}),Object.defineProperty(e.prototype,"onValidated",{set:function(e){this._onValidatedObserver&&this.onValidatedObservable.remove(this._onValidatedObserver),this._onValidatedObserver=this.onValidatedObservable.add(e)},enumerable:!0,configurable:!0}),e.prototype.dispose=function(){this._loader&&(this._loader.dispose(),this._loader=null),this._clear(),this.onDisposeObservable.notifyObservers(void 0),this.onDisposeObservable.clear()},e.prototype._clear=function(){this.preprocessUrlAsync=function(e){return Promise.resolve(e)},this.onMeshLoadedObservable.clear(),this.onTextureLoadedObservable.clear(),this.onMaterialLoadedObservable.clear(),this.onCameraLoadedObservable.clear(),this.onCompleteObservable.clear(),this.onExtensionLoadedObservable.clear()},e.prototype.importMeshAsync=function(e,t,n,r,o,a){var i=this;return this._parseAsync(t,n,r,a).then(function(n){return i._log("Loading "+(a||"")),i._loader=i._getLoader(n),i._loader.importMeshAsync(e,t,n,r,o,a)})},e.prototype.loadAsync=function(e,t,n,r,o){var a=this;return this._parseAsync(e,t,n,o).then(function(t){return a._log("Loading "+(o||"")),a._loader=a._getLoader(t),a._loader.loadAsync(e,t,n,r,o)})},e.prototype.loadAssetContainerAsync=function(e,t,n,r,o){var a=this;return this._parseAsync(e,t,n,o).then(function(t){return a._log("Loading "+(o||"")),a._loader=a._getLoader(t),a._loader.importMeshAsync(null,e,t,n,r,o).then(function(t){var n=new i.AssetContainer(e);return Array.prototype.push.apply(n.meshes,t.meshes),Array.prototype.push.apply(n.particleSystems,t.particleSystems),Array.prototype.push.apply(n.skeletons,t.skeletons),Array.prototype.push.apply(n.animationGroups,t.animationGroups),n.removeAllFromScene(),n})})},e.prototype.canDirectLoad=function(e){return-1!==e.indexOf("scene")&&-1!==e.indexOf("node")},e.prototype.createPlugin=function(){return new e},Object.defineProperty(e.prototype,"loaderState",{get:function(){return this._loader?this._loader.state:null},enumerable:!0,configurable:!0}),e.prototype.whenCompleteAsync=function(){var e=this;return new Promise(function(t,n){e.onCompleteObservable.addOnce(function(){t()}),e.onErrorObservable.addOnce(function(e){n(e)})})},e.prototype._parseAsync=function(e,t,n,r){var o=this;return Promise.resolve().then(function(){var a=t instanceof ArrayBuffer?o._unpackBinary(t):{json:t,bin:null};return o._validateAsync(e,a.json,n,r).then(function(){o._startPerformanceCounter("Parse JSON"),o._log("JSON length: "+a.json.length);var e={json:JSON.parse(a.json),bin:a.bin};return o._endPerformanceCounter("Parse JSON"),o.onParsedObservable.notifyObservers(e),o.onParsedObservable.clear(),e})})},e.prototype._validateAsync=function(e,t,n,r){var o=this;if(!this.validate||"undefined"==typeof GLTFValidator)return Promise.resolve();this._startPerformanceCounter("Validate JSON");var a={externalResourceFunction:function(t){return o.preprocessUrlAsync(n+t).then(function(t){return e._loadFileAsync(t,!0,!0)}).then(function(e){return new Uint8Array(e)})}};return r&&"data:"!==r.substr(0,5)&&(a.uri="file:"===n?r:""+n+r),GLTFValidator.validateString(t,a).then(function(e){o._endPerformanceCounter("Validate JSON"),o.onValidatedObservable.notifyObservers(e),o.onValidatedObservable.clear()},function(e){o._endPerformanceCounter("Validate JSON"),i.Tools.Warn("Failed to validate: "+e),o.onValidatedObservable.clear()})},e.prototype._getLoader=function(t){var n=t.json.asset||{};this._log("Asset version: "+n.version),n.minVersion&&this._log("Asset minimum version: "+n.minVersion),n.generator&&this._log("Asset generator: "+n.generator);var r=e._parseVersion(n.version);if(!r)throw new Error("Invalid version: "+n.version);if(void 0!==n.minVersion){var o=e._parseVersion(n.minVersion);if(!o)throw new Error("Invalid minimum version: "+n.minVersion);if(e._compareVersion(o,{major:2,minor:0})>0)throw new Error("Incompatible minimum version: "+n.minVersion)}var a={1:e._CreateGLTF1Loader,2:e._CreateGLTF2Loader}[r.major];if(!a)throw new Error("Unsupported version: "+n.version);return a(this)},e.prototype._unpackBinary=function(e){this._startPerformanceCounter("Unpack binary"),this._log("Binary length: "+e.byteLength);var t=new l(e),n=t.readUint32();if(1179937895!==n)throw new Error("Unexpected magic: "+n);var r,o=t.readUint32();switch(this.loggingEnabled&&this._log("Binary version: "+o),o){case 1:r=this._unpackBinaryV1(t);break;case 2:r=this._unpackBinaryV2(t);break;default:throw new Error("Unsupported version: "+o)}return this._endPerformanceCounter("Unpack binary"),r},e.prototype._unpackBinaryV1=function(t){var n=t.readUint32();if(n!=t.getLength())throw new Error("Length in header does not match actual data length: "+n+" != "+t.getLength());var r,o=t.readUint32(),a=t.readUint32();switch(a){case 0:r=e._decodeBufferToText(t.readUint8Array(o));break;default:throw new Error("Unexpected content format: "+a)}var i=t.getLength()-t.getPosition();return{json:r,bin:t.readUint8Array(i)}},e.prototype._unpackBinaryV2=function(t){var n=1313821514,r=5130562,o=t.readUint32();if(o!==t.getLength())throw new Error("Length in header does not match actual data length: "+o+" != "+t.getLength());var a=t.readUint32();if(t.readUint32()!==n)throw new Error("First chunk format is not JSON");for(var i=e._decodeBufferToText(t.readUint8Array(a)),s=null;t.getPosition()<t.getLength();){var l=t.readUint32();switch(t.readUint32()){case n:throw new Error("Unexpected JSON chunk");case r:s=t.readUint8Array(l);break;default:t.skipBytes(l)}}return{json:i,bin:s}},e._parseVersion=function(e){if("1.0"===e||"1.0.1"===e)return{major:1,minor:0};var t=(e+"").match(/^(\d+)\.(\d+)/);return t?{major:parseInt(t[1]),minor:parseInt(t[2])}:null},e._compareVersion=function(e,t){return e.major>t.major?1:e.major<t.major?-1:e.minor>t.minor?1:e.minor<t.minor?-1:0},e._decodeBufferToText=function(e){if("undefined"!=typeof TextDecoder)return(new TextDecoder).decode(e);for(var t="",n=e.byteLength,r=0;r<n;r++)t+=String.fromCharCode(e[r]);return t},e.prototype._logOpen=function(e){this._log(e),this._logIndentLevel++},e.prototype._logClose=function(){--this._logIndentLevel},e.prototype._logEnabled=function(t){var n=e._logSpaces.substr(0,2*this._logIndentLevel);i.Tools.Log(""+n+t)},e.prototype._logDisabled=function(e){},e.prototype._startPerformanceCounterEnabled=function(e){i.Tools.StartPerformanceCounter(e)},e.prototype._startPerformanceCounterDisabled=function(e){},e.prototype._endPerformanceCounterEnabled=function(e){i.Tools.EndPerformanceCounter(e)},e.prototype._endPerformanceCounterDisabled=function(e){},e.IncrementalLoading=!0,e.HomogeneousCoordinates=!1,e._logSpaces="                                ",e}(),l=function(){function e(e){this._arrayBuffer=e,this._dataView=new DataView(e),this._byteOffset=0}return e.prototype.getPosition=function(){return this._byteOffset},e.prototype.getLength=function(){return this._arrayBuffer.byteLength},e.prototype.readUint32=function(){var e=this._dataView.getUint32(this._byteOffset,!0);return this._byteOffset+=4,e},e.prototype.readUint8Array=function(e){var t=new Uint8Array(this._arrayBuffer,this._byteOffset,e);return this._byteOffset+=e,t},e.prototype.skipBytes=function(e){this._byteOffset+=e},e}();i.SceneLoader&&i.SceneLoader.RegisterPlugin(new s)},function(e,t){var n;n=function(){return this}();try{n=n||new Function("return this")()}catch(e){"object"==typeof window&&(n=window)}e.exports=n},function(e,t,n){"use strict";n.r(t);var r=n(0),o=n(1),a="EXT_lights_image_based",i=function(){function e(e){this.name=a,this.enabled=!0,this._loader=e}return e.prototype.dispose=function(){delete this._loader,delete this._lights},e.prototype.onLoading=function(){var e=this._loader.gltf.extensions;if(e&&e[this.name]){var t=e[this.name];this._lights=t.lights}},e.prototype.loadSceneAsync=function(e,t){var n=this;return o.b.LoadExtensionAsync(e,t,this.name,function(r,a){var i=new Array;i.push(n._loader.loadSceneAsync(e,t)),n._loader.logOpen(""+r);var s=o.a.Get(r+"/light",n._lights,a.light);return i.push(n._loadLightAsync("#/extensions/"+n.name+"/lights/"+a.light,s).then(function(e){n._loader.babylonScene.environmentTexture=e})),n._loader.logClose(),Promise.all(i).then(function(){})})},e.prototype._loadLightAsync=function(e,t){var n=this;if(!t._loaded){var a=new Array;this._loader.logOpen(""+e);for(var i=new Array(t.specularImages.length),s=function(n){var r=t.specularImages[n];i[n]=new Array(r.length);for(var s=function(t){var s=e+"/specularImages/"+n+"/"+t;l._loader.logOpen(""+s);var u=r[t],c=o.a.Get(s,l._loader.gltf.images,u);a.push(l._loader.loadImageAsync("#/images/"+u,c).then(function(e){i[n][t]=e})),l._loader.logClose()},u=0;u<r.length;u++)s(u)},l=this,u=0;u<t.specularImages.length;u++)s(u);this._loader.logClose(),t._loaded=Promise.all(a).then(function(){var e=new r.RawCubeTexture(n._loader.babylonScene,null,t.specularImageSize);if(t._babylonTexture=e,null!=t.intensity&&(e.level=t.intensity),t.rotation){var o=r.Quaternion.FromArray(t.rotation);n._loader.babylonScene.useRightHandedSystem||(o=r.Quaternion.Inverse(o)),r.Matrix.FromQuaternionToRef(o,e.getReflectionTextureMatrix())}var a=r.SphericalHarmonics.FromArray(t.irradianceCoefficients);a.scale(t.intensity),a.convertIrradianceToLambertianRadiance();var s=r.SphericalPolynomial.FromHarmonics(a),l=(i.length-1)/r.Scalar.Log2(t.specularImageSize);return e.updateRGBDAsync(i,s,l)})}return t._loaded.then(function(){return t._babylonTexture})},e}();o.b.RegisterExtension(a,function(e){return new i(e)});var s="KHR_draco_mesh_compression",l=function(){function e(e){this.name=s,this.enabled=r.DracoCompression.DecoderAvailable,this._loader=e}return e.prototype.dispose=function(){this._dracoCompression&&(this._dracoCompression.dispose(),delete this._dracoCompression),delete this._loader},e.prototype._loadVertexDataAsync=function(e,t,n){var a=this;return o.b.LoadExtensionAsync(e,t,this.name,function(i,s){if(null!=t.mode){if(5!==t.mode&&4!==t.mode)throw new Error(e+": Unsupported mode "+t.mode);if(5===t.mode)throw new Error(e+": Mode "+t.mode+" is not currently supported")}var l={},u=function(e,t){var r=s.attributes[e];null!=r&&(n._delayInfo=n._delayInfo||[],-1===n._delayInfo.indexOf(t)&&n._delayInfo.push(t),l[t]=r)};u("POSITION",r.VertexBuffer.PositionKind),u("NORMAL",r.VertexBuffer.NormalKind),u("TANGENT",r.VertexBuffer.TangentKind),u("TEXCOORD_0",r.VertexBuffer.UVKind),u("TEXCOORD_1",r.VertexBuffer.UV2Kind),u("JOINTS_0",r.VertexBuffer.MatricesIndicesKind),u("WEIGHTS_0",r.VertexBuffer.MatricesWeightsKind),u("COLOR_0",r.VertexBuffer.ColorKind);var c=o.a.Get(i,a._loader.gltf.bufferViews,s.bufferView);return c._dracoBabylonGeometry||(c._dracoBabylonGeometry=a._loader.loadBufferViewAsync("#/bufferViews/"+c.index,c).then(function(t){return a._dracoCompression||(a._dracoCompression=new r.DracoCompression),a._dracoCompression.decodeMeshAsync(t,l).then(function(e){var t=new r.Geometry(n.name,a._loader.babylonScene);return e.applyToGeometry(t),t}).catch(function(t){throw new Error(e+": "+t.message)})})),c._dracoBabylonGeometry})},e}();o.b.RegisterExtension(s,function(e){return new l(e)});var u,c="KHR_lights_punctual";!function(e){e.DIRECTIONAL="directional",e.POINT="point",e.SPOT="spot"}(u||(u={}));var f=function(){function e(e){this.name=c,this.enabled=!0,this._loader=e}return e.prototype.dispose=function(){delete this._loader,delete this._lights},e.prototype.onLoading=function(){var e=this._loader.gltf.extensions;if(e&&e[this.name]){var t=e[this.name];this._lights=t.lights}},e.prototype.loadNodeAsync=function(e,t,n){var a=this;return o.b.LoadExtensionAsync(e,t,this.name,function(i,s){return a._loader.loadNodeAsync(e,t,function(e){var t,l=o.a.Get(i,a._lights,s.light),c=l.name||e.name;switch(l.type){case u.DIRECTIONAL:t=new r.DirectionalLight(c,r.Vector3.Backward(),a._loader.babylonScene);break;case u.POINT:t=new r.PointLight(c,r.Vector3.Zero(),a._loader.babylonScene);break;case u.SPOT:var f=new r.SpotLight(c,r.Vector3.Zero(),r.Vector3.Backward(),0,1,a._loader.babylonScene);f.angle=2*(l.spot&&l.spot.outerConeAngle||Math.PI/4),f.innerAngle=2*(l.spot&&l.spot.innerConeAngle||0),t=f;break;default:throw new Error(i+": Invalid light type ("+l.type+")")}t.falloffType=r.Light.FALLOFF_GLTF,t.diffuse=l.color?r.Color3.FromArray(l.color):r.Color3.White(),t.intensity=null==l.intensity?1:l.intensity,t.range=null==l.range?Number.MAX_VALUE:l.range,t.parent=e,o.b.AddPointerMetadata(t,i),n(e)})})},e}();o.b.RegisterExtension(c,function(e){return new f(e)});var d="KHR_materials_pbrSpecularGlossiness",h=function(){function e(e){this.name=d,this.enabled=!0,this._loader=e}return e.prototype.dispose=function(){delete this._loader},e.prototype.loadMaterialPropertiesAsync=function(e,t,n){var r=this;return o.b.LoadExtensionAsync(e,t,this.name,function(o,a){var i=new Array;return i.push(r._loader.loadMaterialBasePropertiesAsync(e,t,n)),i.push(r._loadSpecularGlossinessPropertiesAsync(o,t,a,n)),r._loader.loadMaterialAlphaProperties(e,t,n),Promise.all(i).then(function(){})})},e.prototype._loadSpecularGlossinessPropertiesAsync=function(e,t,n,o){if(!(o instanceof r.PBRMaterial))throw new Error(e+": Material type not supported");var a=new Array;return o.metallic=null,o.roughness=null,n.diffuseFactor?(o.albedoColor=r.Color3.FromArray(n.diffuseFactor),o.alpha=n.diffuseFactor[3]):o.albedoColor=r.Color3.White(),o.reflectivityColor=n.specularFactor?r.Color3.FromArray(n.specularFactor):r.Color3.White(),o.microSurface=null==n.glossinessFactor?1:n.glossinessFactor,n.diffuseTexture&&a.push(this._loader.loadTextureInfoAsync(e+"/diffuseTexture",n.diffuseTexture,function(e){e.name=o.name+" (Diffuse)",o.albedoTexture=e})),n.specularGlossinessTexture&&(a.push(this._loader.loadTextureInfoAsync(e+"/specularGlossinessTexture",n.specularGlossinessTexture,function(e){e.name=o.name+" (Specular Glossiness)",o.reflectivityTexture=e})),o.reflectivityTexture.hasAlpha=!0,o.useMicroSurfaceFromReflectivityMapAlpha=!0),Promise.all(a).then(function(){})},e}();o.b.RegisterExtension(d,function(e){return new h(e)});var p="KHR_materials_unlit",_=function(){function e(e){this.name=p,this.enabled=!0,this._loader=e}return e.prototype.dispose=function(){delete this._loader},e.prototype.loadMaterialPropertiesAsync=function(e,t,n){var r=this;return o.b.LoadExtensionAsync(e,t,this.name,function(){return r._loadUnlitPropertiesAsync(e,t,n)})},e.prototype._loadUnlitPropertiesAsync=function(e,t,n){if(!(n instanceof r.PBRMaterial))throw new Error(e+": Material type not supported");var o=new Array;n.unlit=!0;var a=t.pbrMetallicRoughness;return a&&(a.baseColorFactor?(n.albedoColor=r.Color3.FromArray(a.baseColorFactor),n.alpha=a.baseColorFactor[3]):n.albedoColor=r.Color3.White(),a.baseColorTexture&&o.push(this._loader.loadTextureInfoAsync(e+"/baseColorTexture",a.baseColorTexture,function(e){e.name=n.name+" (Base Color)",n.albedoTexture=e}))),t.doubleSided&&(n.backFaceCulling=!1,n.twoSidedLighting=!0),this._loader.loadMaterialAlphaProperties(e,t,n),Promise.all(o).then(function(){})},e}();o.b.RegisterExtension(p,function(e){return new _(e)});var m="KHR_texture_transform",y=function(){function e(e){this.name=m,this.enabled=!0,this._loader=e}return e.prototype.dispose=function(){delete this._loader},e.prototype.loadTextureInfoAsync=function(e,t,n){var a=this;return o.b.LoadExtensionAsync(e,t,this.name,function(o,i){return a._loader.loadTextureInfoAsync(e,t,function(e){if(!(e instanceof r.Texture))throw new Error(o+": Texture type not supported");i.offset&&(e.uOffset=i.offset[0],e.vOffset=i.offset[1]),e.uRotationCenter=0,e.vRotationCenter=0,i.rotation&&(e.wAng=-i.rotation),i.scale&&(e.uScale=i.scale[0],e.vScale=i.scale[1]),null!=i.texCoord&&(e.coordinatesIndex=i.texCoord),n(e)})})},e}();o.b.RegisterExtension(m,function(e){return new y(e)});var A="MSFT_audio_emitter",b=function(){function e(e){this.name=A,this.enabled=!0,this._loader=e}return e.prototype.dispose=function(){delete this._loader,delete this._clips,delete this._emitters},e.prototype.onLoading=function(){var e=this._loader.gltf.extensions;if(e&&e[this.name]){var t=e[this.name];this._clips=t.clips,this._emitters=t.emitters,o.a.Assign(this._clips),o.a.Assign(this._emitters)}},e.prototype.loadSceneAsync=function(e,t){var n=this;return o.b.LoadExtensionAsync(e,t,this.name,function(r,a){var i=new Array;i.push(n._loader.loadSceneAsync(e,t));for(var s=0,l=a.emitters;s<l.length;s++){var u=l[s],c=o.a.Get(r+"/emitters",n._emitters,u);if(null!=c.refDistance||null!=c.maxDistance||null!=c.rolloffFactor||null!=c.distanceModel||null!=c.innerAngle||null!=c.outerAngle)throw new Error(r+": Direction or Distance properties are not allowed on emitters attached to a scene");i.push(n._loadEmitterAsync(r+"/emitters/"+c.index,c))}return Promise.all(i).then(function(){})})},e.prototype.loadNodeAsync=function(e,t,n){var a=this;return o.b.LoadExtensionAsync(e,t,this.name,function(e,i){var s=new Array;return a._loader.loadNodeAsync(e,t,function(t){for(var l=function(n){var i=o.a.Get(e+"/emitters",a._emitters,n);s.push(a._loadEmitterAsync(e+"/emitters/"+i.index,i).then(function(){for(var e=0,n=i._babylonSounds;e<n.length;e++){var o=n[e];o.attachToMesh(t),null==i.innerAngle&&null==i.outerAngle||(o.setLocalDirectionToMesh(r.Vector3.Forward()),o.setDirectionalCone(2*r.Tools.ToDegrees(null==i.innerAngle?Math.PI:i.innerAngle),2*r.Tools.ToDegrees(null==i.outerAngle?Math.PI:i.outerAngle),0))}}))},u=0,c=i.emitters;u<c.length;u++){l(c[u])}n(t)}).then(function(e){return Promise.all(s).then(function(){return e})})})},e.prototype.loadAnimationAsync=function(e,t){var n=this;return o.b.LoadExtensionAsync(e,t,this.name,function(r,a){return n._loader.loadAnimationAsync(e,t).then(function(i){var s=new Array;o.a.Assign(a.events);for(var l=0,u=a.events;l<u.length;l++){var c=u[l];s.push(n._loadAnimationEventAsync(r+"/events/"+c.index,e,t,c,i))}return Promise.all(s).then(function(){return i})})})},e.prototype._loadClipAsync=function(e,t){if(t._objectURL)return t._objectURL;var n;if(t.uri)n=this._loader.loadUriAsync(e,t,t.uri);else{var r=o.a.Get(e+"/bufferView",this._loader.gltf.bufferViews,t.bufferView);n=this._loader.loadBufferViewAsync("#/bufferViews/"+r.index,r)}return t._objectURL=n.then(function(e){return URL.createObjectURL(new Blob([e],{type:t.mimeType}))}),t._objectURL},e.prototype._loadEmitterAsync=function(e,t){var n=this;if(t._babylonSounds=t._babylonSounds||[],!t._babylonData){for(var a=new Array,i=t.name||"emitter"+t.index,s={loop:!1,autoplay:!1,volume:null==t.volume?1:t.volume},l=function(e){var l="#/extensions/"+u.name+"/clips",c=o.a.Get(l,u._clips,t.clips[e].clip);a.push(u._loadClipAsync(l+"/"+t.clips[e].clip,c).then(function(o){var a=t._babylonSounds[e]=new r.Sound(i,o,n._loader.babylonScene,null,s);a.refDistance=t.refDistance||1,a.maxDistance=t.maxDistance||256,a.rolloffFactor=t.rolloffFactor||1,a.distanceModel=t.distanceModel||"exponential",a._positionInEmitterSpace=!0}))},u=this,c=0;c<t.clips.length;c++)l(c);var f=Promise.all(a).then(function(){var e=t.clips.map(function(e){return e.weight||1}),n=new r.WeightedSound(t.loop||!1,t._babylonSounds,e);t.innerAngle&&(n.directionalConeInnerAngle=2*r.Tools.ToDegrees(t.innerAngle)),t.outerAngle&&(n.directionalConeOuterAngle=2*r.Tools.ToDegrees(t.outerAngle)),t.volume&&(n.volume=t.volume),t._babylonData.sound=n});t._babylonData={loaded:f}}return t._babylonData.loaded},e.prototype._getEventAction=function(e,t,n,r,o){switch(n){case"play":return function(e){var n=(o||0)+(e-r);t.play(n)};case"stop":return function(e){t.stop()};case"pause":return function(e){t.pause()};default:throw new Error(e+": Unsupported action "+n)}},e.prototype._loadAnimationEventAsync=function(e,t,n,a,i){var s=this;if(0==i.targetedAnimations.length)return Promise.resolve();var l=i.targetedAnimations[0],u=a.emitter,c=o.a.Get("#/extensions/"+this.name+"/emitters",this._emitters,u);return this._loadEmitterAsync(e,c).then(function(){var t=c._babylonData.sound;if(t){var n=new r.AnimationEvent(a.time,s._getEventAction(e,t,a.action,a.time,a.startOffset));l.animation.addEvent(n),i.onAnimationGroupEndObservable.add(function(){t.stop()}),i.onAnimationGroupPauseObservable.add(function(){t.pause()})}})},e}();o.b.RegisterExtension(A,function(e){return new b(e)});var v="MSFT_lod",g=function(){function e(e){this.name=v,this.enabled=!0,this.maxLODsToLoad=Number.MAX_VALUE,this.onNodeLODsLoadedObservable=new r.Observable,this.onMaterialLODsLoadedObservable=new r.Observable,this._nodeIndexLOD=null,this._nodeSignalLODs=new Array,this._nodePromiseLODs=new Array,this._materialIndexLOD=null,this._materialSignalLODs=new Array,this._materialPromiseLODs=new Array,this._loader=e}return e.prototype.dispose=function(){delete this._loader,this._nodeIndexLOD=null,this._nodeSignalLODs.length=0,this._nodePromiseLODs.length=0,this._materialIndexLOD=null,this._materialSignalLODs.length=0,this._materialPromiseLODs.length=0,this.onMaterialLODsLoadedObservable.clear(),this.onNodeLODsLoadedObservable.clear()},e.prototype.onReady=function(){for(var e=this,t=function(t){var r=Promise.all(n._nodePromiseLODs[t]).then(function(){0!==t&&e._loader.endPerformanceCounter("Node LOD "+t),e._loader.log("Loaded node LOD "+t),e.onNodeLODsLoadedObservable.notifyObservers(t),t!==e._nodePromiseLODs.length-1&&(e._loader.startPerformanceCounter("Node LOD "+(t+1)),e._nodeSignalLODs[t]&&e._nodeSignalLODs[t].resolve())});n._loader._completePromises.push(r)},n=this,r=0;r<this._nodePromiseLODs.length;r++)t(r);var o=function(t){var n=Promise.all(a._materialPromiseLODs[t]).then(function(){0!==t&&e._loader.endPerformanceCounter("Material LOD "+t),e._loader.log("Loaded material LOD "+t),e.onMaterialLODsLoadedObservable.notifyObservers(t),t!==e._materialPromiseLODs.length-1&&(e._loader.startPerformanceCounter("Material LOD "+(t+1)),e._materialSignalLODs[t]&&e._materialSignalLODs[t].resolve())});a._loader._completePromises.push(n)},a=this;for(r=0;r<this._materialPromiseLODs.length;r++)o(r)},e.prototype.loadNodeAsync=function(e,t,n){var a=this;return o.b.LoadExtensionAsync(e,t,this.name,function(e,n){var o,i=a._getLODs(e,t,a._loader.gltf.nodes,n.ids);a._loader.logOpen(""+e);for(var s=function(e){var t=i[e];0!==e&&(a._nodeIndexLOD=e,a._nodeSignalLODs[e]=a._nodeSignalLODs[e]||new r.Deferred);var n=a._loader.loadNodeAsync("#/nodes/"+t.index,t,function(e){e.setEnabled(!1)}).then(function(t){if(0!==e){var n=i[e-1];n._babylonTransformNode&&(n._babylonTransformNode.dispose(),delete n._babylonTransformNode,a._disposeUnusedMaterials())}return t.setEnabled(!0),t});0===e?o=n:a._nodeIndexLOD=null,a._nodePromiseLODs[e]=a._nodePromiseLODs[e]||[],a._nodePromiseLODs[e].push(n)},l=0;l<i.length;l++)s(l);return a._loader.logClose(),o})},e.prototype._loadMaterialAsync=function(e,t,n,r,a){var i=this;return this._nodeIndexLOD?null:o.b.LoadExtensionAsync(e,t,this.name,function(e,o){var s,l=i._getLODs(e,t,i._loader.gltf.materials,o.ids);i._loader.logOpen(""+e);for(var u=function(e){var t=l[e];0!==e&&(i._materialIndexLOD=e);var o=i._loader._loadMaterialAsync("#/materials/"+t.index,t,n,r,function(t){0===e&&a(t)}).then(function(t){if(0!==e){a(t);var n=l[e-1]._data;n[r]&&(n[r].babylonMaterial.dispose(),delete n[r])}return t});0===e?s=o:i._materialIndexLOD=null,i._materialPromiseLODs[e]=i._materialPromiseLODs[e]||[],i._materialPromiseLODs[e].push(o)},c=0;c<l.length;c++)u(c);return i._loader.logClose(),s})},e.prototype._loadUriAsync=function(e,t,n){var o=this;if(null!==this._materialIndexLOD){this._loader.log("deferred");var a=this._materialIndexLOD-1;return this._materialSignalLODs[a]=this._materialSignalLODs[a]||new r.Deferred,this._materialSignalLODs[a].promise.then(function(){return o._loader.loadUriAsync(e,t,n)})}if(null!==this._nodeIndexLOD){this._loader.log("deferred");a=this._nodeIndexLOD-1;return this._nodeSignalLODs[a]=this._nodeSignalLODs[a]||new r.Deferred,this._nodeSignalLODs[this._nodeIndexLOD-1].promise.then(function(){return o._loader.loadUriAsync(e,t,n)})}return null},e.prototype._getLODs=function(e,t,n,r){if(this.maxLODsToLoad<=0)throw new Error("maxLODsToLoad must be greater than zero");for(var a=new Array,i=r.length-1;i>=0;i--)if(a.push(o.a.Get(e+"/ids/"+r[i],n,r[i])),a.length===this.maxLODsToLoad)return a;return a.push(t),a},e.prototype._disposeUnusedMaterials=function(){var e=this._loader.gltf.materials;if(e)for(var t=0,n=e;t<n.length;t++){var r=n[t];if(r._data)for(var o in r._data){var a=r._data[o];0===a.babylonMeshes.length&&(a.babylonMaterial.dispose(!1,!0),delete r._data[o])}}},e}();o.b.RegisterExtension(v,function(e){return new g(e)});var T="MSFT_minecraftMesh",E=function(){function e(e){this.name=T,this.enabled=!0,this._loader=e}return e.prototype.dispose=function(){delete this._loader},e.prototype.loadMaterialPropertiesAsync=function(e,t,n){var a=this;return o.b.LoadExtraAsync(e,t,this.name,function(o,i){if(i){if(!(n instanceof r.PBRMaterial))throw new Error(o+": Material type not supported");var s=a._loader.loadMaterialPropertiesAsync(e,t,n);return n.needAlphaBlending()&&(n.forceDepthWrite=!0,n.separateCullingPass=!0),n.backFaceCulling=n.forceDepthWrite,n.twoSidedLighting=!0,s}return null})},e}();o.b.RegisterExtension(T,function(e){return new E(e)});var L="MSFT_sRGBFactors",O=function(){function e(e){this.name=L,this.enabled=!0,this._loader=e}return e.prototype.dispose=function(){delete this._loader},e.prototype.loadMaterialPropertiesAsync=function(e,t,n){var a=this;return o.b.LoadExtraAsync(e,t,this.name,function(o,i){if(i){if(!(n instanceof r.PBRMaterial))throw new Error(o+": Material type not supported");var s=a._loader.loadMaterialPropertiesAsync(e,t,n);return n.albedoTexture||n.albedoColor.toLinearSpaceToRef(n.albedoColor),n.reflectivityTexture||n.reflectivityColor.toLinearSpaceToRef(n.reflectivityColor),s}return null})},e}();o.b.RegisterExtension(L,function(e){return new O(e)}),n.d(t,"EXT_lights_image_based",function(){return i}),n.d(t,"KHR_draco_mesh_compression",function(){return l}),n.d(t,"KHR_lights",function(){return f}),n.d(t,"KHR_materials_pbrSpecularGlossiness",function(){return h}),n.d(t,"KHR_materials_unlit",function(){return _}),n.d(t,"KHR_texture_transform",function(){return y}),n.d(t,"MSFT_audio_emitter",function(){return b}),n.d(t,"MSFT_lod",function(){return g}),n.d(t,"MSFT_minecraftMesh",function(){return E}),n.d(t,"MSFT_sRGBFactors",function(){return O})},function(e,t,n){"use strict";n.r(t);var r=n(1);n.d(t,"ArrayItem",function(){return r.a}),n.d(t,"GLTFLoader",function(){return r.b});var o=n(4);n.d(t,"EXT_lights_image_based",function(){return o.EXT_lights_image_based}),n.d(t,"KHR_draco_mesh_compression",function(){return o.KHR_draco_mesh_compression}),n.d(t,"KHR_lights",function(){return o.KHR_lights}),n.d(t,"KHR_materials_pbrSpecularGlossiness",function(){return o.KHR_materials_pbrSpecularGlossiness}),n.d(t,"KHR_materials_unlit",function(){return o.KHR_materials_unlit}),n.d(t,"KHR_texture_transform",function(){return o.KHR_texture_transform}),n.d(t,"MSFT_audio_emitter",function(){return o.MSFT_audio_emitter}),n.d(t,"MSFT_lod",function(){return o.MSFT_lod}),n.d(t,"MSFT_minecraftMesh",function(){return o.MSFT_minecraftMesh}),n.d(t,"MSFT_sRGBFactors",function(){return o.MSFT_sRGBFactors})},function(e,t,n){"use strict";n.r(t);
/*! *****************************************************************************
Copyright (c) Microsoft Corporation. All rights reserved.
Licensed under the Apache License, Version 2.0 (the "License"); you may not use
this file except in compliance with the License. You may obtain a copy of the
License at http://www.apache.org/licenses/LICENSE-2.0

THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
MERCHANTABLITY OR NON-INFRINGEMENT.

See the Apache Version 2.0 License for specific language governing permissions
and limitations under the License.
***************************************************************************** */
var r=function(e,t){return(r=Object.setPrototypeOf||{__proto__:[]}instanceof Array&&function(e,t){e.__proto__=t}||function(e,t){for(var n in t)t.hasOwnProperty(n)&&(e[n]=t[n])})(e,t)};function o(e,t){function n(){this.constructor=e}r(e,t),e.prototype=null===t?Object.create(t):(n.prototype=t.prototype,new n)}var a,i,s,l,u,c,f,d;!function(e){e[e.BYTE=5120]="BYTE",e[e.UNSIGNED_BYTE=5121]="UNSIGNED_BYTE",e[e.SHORT=5122]="SHORT",e[e.UNSIGNED_SHORT=5123]="UNSIGNED_SHORT",e[e.FLOAT=5126]="FLOAT"}(a||(a={})),function(e){e[e.FRAGMENT=35632]="FRAGMENT",e[e.VERTEX=35633]="VERTEX"}(i||(i={})),function(e){e[e.BYTE=5120]="BYTE",e[e.UNSIGNED_BYTE=5121]="UNSIGNED_BYTE",e[e.SHORT=5122]="SHORT",e[e.UNSIGNED_SHORT=5123]="UNSIGNED_SHORT",e[e.INT=5124]="INT",e[e.UNSIGNED_INT=5125]="UNSIGNED_INT",e[e.FLOAT=5126]="FLOAT",e[e.FLOAT_VEC2=35664]="FLOAT_VEC2",e[e.FLOAT_VEC3=35665]="FLOAT_VEC3",e[e.FLOAT_VEC4=35666]="FLOAT_VEC4",e[e.INT_VEC2=35667]="INT_VEC2",e[e.INT_VEC3=35668]="INT_VEC3",e[e.INT_VEC4=35669]="INT_VEC4",e[e.BOOL=35670]="BOOL",e[e.BOOL_VEC2=35671]="BOOL_VEC2",e[e.BOOL_VEC3=35672]="BOOL_VEC3",e[e.BOOL_VEC4=35673]="BOOL_VEC4",e[e.FLOAT_MAT2=35674]="FLOAT_MAT2",e[e.FLOAT_MAT3=35675]="FLOAT_MAT3",e[e.FLOAT_MAT4=35676]="FLOAT_MAT4",e[e.SAMPLER_2D=35678]="SAMPLER_2D"}(s||(s={})),function(e){e[e.CLAMP_TO_EDGE=33071]="CLAMP_TO_EDGE",e[e.MIRRORED_REPEAT=33648]="MIRRORED_REPEAT",e[e.REPEAT=10497]="REPEAT"}(l||(l={})),function(e){e[e.NEAREST=9728]="NEAREST",e[e.LINEAR=9728]="LINEAR",e[e.NEAREST_MIPMAP_NEAREST=9984]="NEAREST_MIPMAP_NEAREST",e[e.LINEAR_MIPMAP_NEAREST=9985]="LINEAR_MIPMAP_NEAREST",e[e.NEAREST_MIPMAP_LINEAR=9986]="NEAREST_MIPMAP_LINEAR",e[e.LINEAR_MIPMAP_LINEAR=9987]="LINEAR_MIPMAP_LINEAR"}(u||(u={})),function(e){e[e.ALPHA=6406]="ALPHA",e[e.RGB=6407]="RGB",e[e.RGBA=6408]="RGBA",e[e.LUMINANCE=6409]="LUMINANCE",e[e.LUMINANCE_ALPHA=6410]="LUMINANCE_ALPHA"}(c||(c={})),function(e){e[e.FRONT=1028]="FRONT",e[e.BACK=1029]="BACK",e[e.FRONT_AND_BACK=1032]="FRONT_AND_BACK"}(f||(f={})),function(e){e[e.ZERO=0]="ZERO",e[e.ONE=1]="ONE",e[e.SRC_COLOR=768]="SRC_COLOR",e[e.ONE_MINUS_SRC_COLOR=769]="ONE_MINUS_SRC_COLOR",e[e.DST_COLOR=774]="DST_COLOR",e[e.ONE_MINUS_DST_COLOR=775]="ONE_MINUS_DST_COLOR",e[e.SRC_ALPHA=770]="SRC_ALPHA",e[e.ONE_MINUS_SRC_ALPHA=771]="ONE_MINUS_SRC_ALPHA",e[e.DST_ALPHA=772]="DST_ALPHA",e[e.ONE_MINUS_DST_ALPHA=773]="ONE_MINUS_DST_ALPHA",e[e.CONSTANT_COLOR=32769]="CONSTANT_COLOR",e[e.ONE_MINUS_CONSTANT_COLOR=32770]="ONE_MINUS_CONSTANT_COLOR",e[e.CONSTANT_ALPHA=32771]="CONSTANT_ALPHA",e[e.ONE_MINUS_CONSTANT_ALPHA=32772]="ONE_MINUS_CONSTANT_ALPHA",e[e.SRC_ALPHA_SATURATE=776]="SRC_ALPHA_SATURATE"}(d||(d={}));var h,p=n(0),_=function(){function e(){}return e.SetMatrix=function(e,t,n,r,o){var a=null;if("MODEL"===n.semantic?a=t.getWorldMatrix():"PROJECTION"===n.semantic?a=e.getProjectionMatrix():"VIEW"===n.semantic?a=e.getViewMatrix():"MODELVIEWINVERSETRANSPOSE"===n.semantic?a=p.Matrix.Transpose(t.getWorldMatrix().multiply(e.getViewMatrix()).invert()):"MODELVIEW"===n.semantic?a=t.getWorldMatrix().multiply(e.getViewMatrix()):"MODELVIEWPROJECTION"===n.semantic?a=t.getWorldMatrix().multiply(e.getTransformMatrix()):"MODELINVERSE"===n.semantic?a=t.getWorldMatrix().invert():"VIEWINVERSE"===n.semantic?a=e.getViewMatrix().invert():"PROJECTIONINVERSE"===n.semantic?a=e.getProjectionMatrix().invert():"MODELVIEWINVERSE"===n.semantic?a=t.getWorldMatrix().multiply(e.getViewMatrix()).invert():"MODELVIEWPROJECTIONINVERSE"===n.semantic?a=t.getWorldMatrix().multiply(e.getTransformMatrix()).invert():"MODELINVERSETRANSPOSE"===n.semantic&&(a=p.Matrix.Transpose(t.getWorldMatrix().invert())),a)switch(n.type){case 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f=e.lights[t.light];if(f)if("ambient"===f.type){var d=f[f.type],h=new p.HemisphericLight(t.light,p.Vector3.Zero(),e.scene);h.name=t.name||"",d.color&&(h.diffuse=p.Color3.FromArray(d.color)),o=h}else if("directional"===f.type){var _=f[f.type],m=new p.DirectionalLight(t.light,p.Vector3.Zero(),e.scene);m.name=t.name||"",_.color&&(m.diffuse=p.Color3.FromArray(_.color)),o=m}else if("point"===f.type){var y=f[f.type],A=new p.PointLight(t.light,p.Vector3.Zero(),e.scene);A.name=t.name||"",y.color&&(A.diffuse=p.Color3.FromArray(y.color)),o=A}else if("spot"===f.type){var b=f[f.type],v=new p.SpotLight(t.light,p.Vector3.Zero(),p.Vector3.Zero(),0,0,e.scene);v.name=t.name||"",b.color&&(v.diffuse=p.Color3.FromArray(b.color)),b.fallOfAngle&&(v.angle=b.fallOfAngle),b.fallOffExponent&&(v.exponent=b.fallOffExponent),o=v}}if(!t.jointName){if(t.babylonNode)return t.babylonNode;if(null===o){var g=new p.Mesh(t.name||"",e.scene);t.babylonNode=g,o=g}}if(null!==o){if(t.matrix&&o instanceof 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