!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=18)}([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 s}));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}(),s=function(){function e(e){this._completePromises=new Array,this._forAssetContainer=!1,this._babylonLights=[],this._disableInstancedMesh=0,this._disposed=!1,this._state=null,this._extensions=new Array,this._defaultBabylonMaterialData={},this._parent=e}return e.RegisterExtension=function(t,n){e.UnregisterExtension(t)&&r.Logger.Warn("Extension with the name '"+t+"' already exists"),e._RegisteredExtensions[t]={factory:n}},e.UnregisterExtension=function(t){return!!e._RegisteredExtensions[t]&&(delete e._RegisteredExtensions[t],!0)},Object.defineProperty(e.prototype,"state",{get:function(){return this._state},enumerable:!1,configurable:!0}),Object.defineProperty(e.prototype,"gltf",{get:function(){return this._gltf},enumerable:!1,configurable:!0}),Object.defineProperty(e.prototype,"bin",{get:function(){return this._bin},enumerable:!1,configurable:!0}),Object.defineProperty(e.prototype,"parent",{get:function(){return this._parent},enumerable:!1,configurable:!0}),Object.defineProperty(e.prototype,"babylonScene",{get:function(){return this._babylonScene},enumerable:!1,configurable:!0}),Object.defineProperty(e.prototype,"rootBabylonMesh",{get:function(){return this._rootBabylonMesh},enumerable:!1,configurable:!0}),e.prototype.dispose=function(){if(!this._disposed){for(var e in this._disposed=!0,this._completePromises.length=0,this._extensions){var t=this._extensions[e];t.dispose&&t.dispose(),delete this._extensions[e]}this._gltf=null,this._babylonScene=null,this._rootBabylonMesh=null,this._parent.dispose()}},e.prototype.importMeshAsync=function(e,t,n,r,o,a,s){var i=this;return Promise.resolve().then((function(){i._babylonScene=t,i._rootUrl=o,i._fileName=s||"scene",i._forAssetContainer=n,i._loadData(r);var a=null;if(e){var l={};if(i._gltf.nodes)for(var u=0,c=i._gltf.nodes;u<c.length;u++){var d=c[u];d.name&&(l[d.name]=d.index)}a=(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(a,(function(){return{meshes:i._getMeshes(),particleSystems:[],skeletons:i._getSkeletons(),animationGroups:i._getAnimationGroups(),lights:i._babylonLights,transformNodes:i._getTransformNodes()}}))}))},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._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 s=o.GLTFLoaderState[o.GLTFLoaderState.LOADING]+" => "+o.GLTFLoaderState[o.GLTFLoaderState.READY],i=o.GLTFLoaderState[o.GLTFLoaderState.LOADING]+" => "+o.GLTFLoaderState[o.GLTFLoaderState.COMPLETE];n._parent._startPerformanceCounter(s),n._parent._startPerformanceCounter(i),n._setState(o.GLTFLoaderState.LOADING),n._extensionsOnLoading();var l=new Array,u=n._babylonScene.blockMaterialDirtyMechanism;if(n._babylonScene.blockMaterialDirtyMechanism=!0,e)l.push(n.loadSceneAsync("/nodes",{nodes:e,index:-1}));else if(null!=n._gltf.scene||n._gltf.scenes&&n._gltf.scenes[0]){var c=a.Get("/scene",n._gltf.scenes,n._gltf.scene||0);l.push(n.loadSceneAsync("/scenes/"+c.index,c))}if(n.parent.loadAllMaterials&&n._gltf.materials)for(var d=0;d<n._gltf.materials.length;++d){var f=n._gltf.materials[d],h="/materials/"+d,p=r.Material.TriangleFillMode;l.push(n._loadMaterialAsync(h,f,null,p,(function(e){})))}n._babylonScene.blockMaterialDirtyMechanism=u,n._parent.compileMaterials&&l.push(n._compileMaterialsAsync()),n._parent.compileShadowGenerators&&l.push(n._compileShadowGeneratorsAsync());var _=Promise.all(l).then((function(){return n._rootBabylonMesh&&n._rootBabylonMesh.setEnabled(!0),n._extensionsOnReady(),n._setState(o.GLTFLoaderState.READY),n._startAnimations(),t()}));return _.then((function(){n._parent._endPerformanceCounter(s),r.Tools.SetImmediate((function(){n._disposed||Promise.all(n._completePromises).then((function(){n._parent._endPerformanceCounter(i),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()}))}))})),_})).catch((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.Logger.Warn("Binary buffer length ("+n.byteLength+") from JSON does not match chunk length ("+e.bin.byteLength+")"),this._bin=e.bin}else r.Logger.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 s=this._createRootNode(),i=0,l=this._gltf.nodes;i<l.length;i++){var u,c=e[(u=l[i]).index];u.parent=void 0===c?s:this._gltf.nodes[c]}}},e.prototype._loadExtensions=function(){for(var t in e._RegisteredExtensions){var n=e._RegisteredExtensions[t].factory(this);n.name!==t&&r.Logger.Warn("The name of the glTF loader extension instance does not match the registered name: "+n.name+" !== "+t),this._extensions.push(n),this._parent.onExtensionLoadedObservable.notifyObservers(n)}this._extensions.sort((function(e,t){return(e.order||Number.MAX_VALUE)-(t.order||Number.MAX_VALUE)})),this._parent.onExtensionLoadedObservable.clear()},e.prototype._checkExtensions=function(){if(this._gltf.extensionsRequired)for(var e=function(e){if(!t._extensions.some((function(t){return t.name===e&&t.enabled})))throw new Error("Require extension "+e+" is not available")},t=this,n=0,r=this._gltf.extensionsRequired;n<r.length;n++){e(r[n])}},e.prototype._setState=function(e){this._state=e,this.log(o.GLTFLoaderState[this._state])},e.prototype._createRootNode=function(){this._babylonScene._blockEntityCollection=this._forAssetContainer,this._rootBabylonMesh=new r.Mesh("__root__",this._babylonScene),this._babylonScene._blockEntityCollection=!1,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 s=0,i=t.nodes;s<i.length;s++){var l=i[s],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,d=this._gltf.nodes;c<d.length;c++){if((u=d[c])._babylonTransformNode&&u._babylonBones)for(var f=0,h=u._babylonBones;f<h.length;f++){h[f].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._getTransformNodes=function(){var e=new Array,t=this._gltf.nodes;if(t)for(var n=0,r=t;n<r.length;n++){var o=r[n];o._babylonTransformNode&&"TransformNode"===o._babylonTransformNode.getClassName()&&e.push(o._babylonTransformNode)}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.Logger.Error("Invalid animation start mode ("+this._parent.animationStartMode+")")}},e.prototype.loadNodeAsync=function(t,n,o){var s=this;void 0===o&&(o=function(){});var i=this._extensionsLoadNodeAsync(t,n,o);if(i)return i;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 i=a.Get(t+"/camera",s._gltf.cameras,n.camera);l.push(s.loadCameraAsync("/cameras/"+i.index,i,(function(e){e.parent=r})))}if(n.children)for(var u=0,c=n.children;u<c.length;u++){var d=c[u],f=a.Get(t+"/children/"+d,s._gltf.nodes,d);l.push(s.loadNodeAsync("/nodes/"+f.index,f,(function(e){e.parent=r})))}o(r)};if(null==n.mesh){var c=n.name||"node"+n.index;this._babylonScene._blockEntityCollection=this._forAssetContainer,n._babylonTransformNode=new r.TransformNode(c,this._babylonScene),this._babylonScene._blockEntityCollection=!1,u(n._babylonTransformNode)}else{var d=a.Get(t+"/mesh",this._gltf.meshes,n.mesh);l.push(this._loadMeshAsync("/meshes/"+d.index,n,d,u))}return this.logClose(),Promise.all(l).then((function(){return s._forEachPrimitive(n,(function(e){e.geometry&&e.geometry.useBoundingInfoFromGeometry?e._updateBoundingInfo():e.refreshBoundingInfo(!0)})),n._babylonTransformNode}))},e.prototype._loadMeshAsync=function(e,t,n,o){var s=n.primitives;if(!s||!s.length)throw new Error(e+": Primitives are missing");null==s[0].index&&a.Assign(s);var i=new Array;this.logOpen(e+" "+(n.name||""));var l=t.name||"node"+t.index;if(1===s.length){var u=n.primitives[0];i.push(this._loadMeshPrimitiveAsync(e+"/primitives/"+u.index,l,t,n,u,(function(e){t._babylonTransformNode=e,t._primitiveBabylonMeshes=[e]})))}else{this._babylonScene._blockEntityCollection=this._forAssetContainer,t._babylonTransformNode=new r.TransformNode(l,this._babylonScene),this._babylonScene._blockEntityCollection=!1,t._primitiveBabylonMeshes=[];for(var c=0,d=s;c<d.length;c++){u=d[c];i.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 f=a.Get(e+"/skin",this._gltf.skins,t.skin);i.push(this._loadSkinAsync("/skins/"+f.index,t,f))}return o(t._babylonTransformNode),this.logClose(),Promise.all(i).then((function(){return t._babylonTransformNode}))},e.prototype._loadMeshPrimitiveAsync=function(t,n,o,s,i,l){var u=this,c=this._extensionsLoadMeshPrimitiveAsync(t,n,o,s,i,l);if(c)return c;this.logOpen(""+t);var d,f,h=0===this._disableInstancedMesh&&this._parent.createInstances&&null==o.skin&&!s.primitives[0].targets;if(h&&i._instanceData)d=i._instanceData.babylonSourceMesh.createInstance(n),f=i._instanceData.promise;else{var p=new Array;this._babylonScene._blockEntityCollection=this._forAssetContainer;var _=new r.Mesh(n,this._babylonScene);this._babylonScene._blockEntityCollection=!1,_.overrideMaterialSideOrientation=this._babylonScene.useRightHandedSystem?r.Material.CounterClockWiseSideOrientation:r.Material.ClockWiseSideOrientation,this._createMorphTargets(t,o,s,i,_),p.push(this._loadVertexDataAsync(t,i,_).then((function(e){return u._loadMorphTargetsAsync(t,i,_,e).then((function(){e.applyToMesh(_)}))})));var m=e._GetDrawMode(t,i.mode);if(null==i.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 b=a.Get(t+"/material",this._gltf.materials,i.material);p.push(this._loadMaterialAsync("/materials/"+b.index,b,_,m,(function(e){_.material=e})))}f=Promise.all(p),h&&(i._instanceData={babylonSourceMesh:_,promise:f}),d=_}return e.AddPointerMetadata(d,t),this._parent.onMeshLoadedObservable.notifyObservers(d),l(d),this.logClose(),f.then((function(){return d}))},e.prototype._loadVertexDataAsync=function(e,t,n){var o=this,s=this._extensionsLoadVertexDataAsync(e,t,n);if(s)return s;var i=t.attributes;if(!i)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 d=function(t,s,c){if(null!=i[t]){n._delayInfo=n._delayInfo||[],-1===n._delayInfo.indexOf(s)&&n._delayInfo.push(s);var d=a.Get(e+"/attributes/"+t,o._gltf.accessors,i[t]);l.push(o._loadVertexAccessorAsync("/accessors/"+d.index,d,s).then((function(e){if(e.getKind()===r.VertexBuffer.PositionKind&&!o.parent.alwaysComputeBoundingBox&&!n.skeleton){var t=d.min,a=d.max;if(void 0!==t&&void 0!==a){var s=r.TmpVectors.Vector3[0],i=r.TmpVectors.Vector3[1];s.copyFromFloats.apply(s,t),i.copyFromFloats.apply(i,a),u._boundingInfo=new r.BoundingInfo(s,i),u.useBoundingInfoFromGeometry=!0}}u.setVerticesBuffer(e,d.count)}))),s==r.VertexBuffer.MatricesIndicesExtraKind&&(n.numBoneInfluencers=8),c&&c(d)}};return d("POSITION",r.VertexBuffer.PositionKind),d("NORMAL",r.VertexBuffer.NormalKind),d("TANGENT",r.VertexBuffer.TangentKind),d("TEXCOORD_0",r.VertexBuffer.UVKind),d("TEXCOORD_1",r.VertexBuffer.UV2Kind),d("JOINTS_0",r.VertexBuffer.MatricesIndicesKind),d("WEIGHTS_0",r.VertexBuffer.MatricesWeightsKind),d("JOINTS_1",r.VertexBuffer.MatricesIndicesExtraKind),d("WEIGHTS_1",r.VertexBuffer.MatricesWeightsExtraKind),d("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");var s=n.extras?n.extras.targetNames:null;a.morphTargetManager=new r.MorphTargetManager(a.getScene());for(var i=0;i<o.targets.length;i++){var l=t.weights?t.weights[i]:n.weights?n.weights[i]:0,u=s?s[i]:"morphTarget"+i;a.morphTargetManager.addTarget(new r.MorphTarget(u,l,a.getScene()))}}},e.prototype._loadMorphTargetsAsync=function(e,t,n,r){if(!t.targets)return Promise.resolve();for(var o=new Array,a=n.morphTargetManager,s=0;s<a.numTargets;s++){var i=a.getTarget(s);o.push(this._loadMorphTargetVertexDataAsync(e+"/targets/"+s,r,t.targets[s],i))}return Promise.all(o).then((function(){}))},e.prototype._loadMorphTargetVertexDataAsync=function(e,t,n,o){var s=this,i=new Array,l=function(r,o,l){if(null!=n[r]){var u=t.getVertexBuffer(o);if(u){var c=a.Get(e+"/"+r,s._gltf.accessors,n[r]);i.push(s._loadFloatAccessorAsync("/accessors/"+c.index,c).then((function(e){l(u,e)})))}}};return l("POSITION",r.VertexBuffer.PositionKind,(function(e,t){var n=new Float32Array(t.length);e.forEach(t.length,(function(e,r){n[r]=t[r]+e})),o.setPositions(n)})),l("NORMAL",r.VertexBuffer.NormalKind,(function(e,t){var n=new Float32Array(t.length);e.forEach(n.length,(function(e,r){n[r]=t[r]+e})),o.setNormals(n)})),l("TANGENT",r.VertexBuffer.TangentKind,(function(e,t){var n=new Float32Array(t.length/3*4),r=0;e.forEach(t.length/3*4,(function(e,o){(o+1)%4!=0&&(n[r]=t[r]+e,r++)})),o.setTangents(n)})),Promise.all(i).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=this._extensionsLoadSkinAsync(e,t,n);if(a)return a;var s=function(e){o._forEachPrimitive(t,(function(t){t.skeleton=e}))};if(n._data)return s(n._data.babylonSkeleton),n._data.promise;var i="skeleton"+n.index;this._babylonScene._blockEntityCollection=this._forAssetContainer;var l=new r.Skeleton(n.name||i,i,this._babylonScene);this._babylonScene._blockEntityCollection=!1,l.overrideMesh=this._rootBabylonMesh,this._loadBones(e,n,l),s(l);var u=this._loadSkinInverseBindMatricesDataAsync(e,n).then((function(e){o._updateBoneMatrices(l,e)}));return n._data={babylonSkeleton:l,promise:u},u},e.prototype._loadBones=function(e,t,n){for(var r={},o=0,s=t.joints;o<s.length;o++){var i=s[o],l=a.Get(e+"/joints/"+i,this._gltf.nodes,i);this._loadBone(l,t,n,r)}},e.prototype._loadBone=function(e,t,n,o){var a=o[e.index];if(a)return a;var s=null;e.parent&&e.parent._babylonTransformNode!==this._rootBabylonMesh&&(s=this._loadBone(e.parent,t,n,o));var i=t.joints.indexOf(e.index);return a=new r.Bone(e.name||"joint"+e.index,n,s,this._getNodeMatrix(e),null,null,i),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],s=r.Matrix.Identity(),i=a._index;t&&-1!==i&&(r.Matrix.FromArrayToRef(t,16*i,s),s.invertToRef(s));var l=a.getParent();l&&s.multiplyToRef(l.getInvertedAbsoluteTransform(),s),a.setBindPose(s),a.updateMatrix(s,!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 s=new Array;this.logOpen(t+" "+(n.name||"")),this._babylonScene._blockEntityCollection=this._forAssetContainer;var i=new r.FreeCamera(n.name||"camera"+n.index,r.Vector3.Zero(),this._babylonScene,!1);switch(this._babylonScene._blockEntityCollection=!1,i.ignoreParentScaling=!0,i.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");i.fov=l.yfov,i.minZ=l.znear,i.maxZ=l.zfar||Number.MAX_VALUE;break;case"orthographic":if(!n.orthographic)throw new Error(t+": Camera orthographic properties are missing");i.mode=r.Camera.ORTHOGRAPHIC_CAMERA,i.orthoLeft=-n.orthographic.xmag,i.orthoRight=n.orthographic.xmag,i.orthoBottom=-n.orthographic.ymag,i.orthoTop=n.orthographic.ymag,i.minZ=n.orthographic.znear,i.maxZ=n.orthographic.zfar;break;default:throw new Error(t+": Invalid camera type ("+n.type+")")}return e.AddPointerMetadata(i,t),this._parent.onCameraLoadedObservable.notifyObservers(i),o(i),this.logClose(),Promise.all(s).then((function(){return i}))},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;this._babylonScene._blockEntityCollection=this._forAssetContainer;var o=new r.AnimationGroup(t.name||"animation"+t.index,this._babylonScene);this._babylonScene._blockEntityCollection=!1,t._babylonAnimationGroup=o;var s=new Array;a.Assign(t.channels),a.Assign(t.samplers);for(var i=0,l=t.channels;i<l.length;i++){var u=l[i];s.push(this._loadAnimationChannelAsync(e+"/channels/"+u.index,e,t,u,o))}return Promise.all(s).then((function(){return o.normalize(0),o}))},e.prototype._loadAnimationChannelAsync=function(e,t,n,o,s,i){var l=this;if(void 0===i&&(i=null),null==o.target.node)return Promise.resolve();var u=a.Get(e+"/target/node",this._gltf.nodes,o.target.node);if("weights"===o.target.path&&!u._numMorphTargets||"weights"!==o.target.path&&!u._babylonTransformNode)return Promise.resolve();var c=a.Get(e+"/sampler",n.samplers,o.sampler);return this._loadAnimationSamplerAsync(t+"/samplers/"+o.sampler,c).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 c,d,f=0;switch(n){case"position":c=function(){var e=r.Vector3.FromArray(t.output,f);return f+=3,e};break;case"rotationQuaternion":c=function(){var e=r.Quaternion.FromArray(t.output,f);return f+=4,e};break;case"scaling":c=function(){var e=r.Vector3.FromArray(t.output,f);return f+=3,e};break;case"influence":c=function(){for(var e=new Array(u._numMorphTargets),n=0;n<u._numMorphTargets;n++)e[n]=t.output[f++];return e}}switch(t.interpolation){case"STEP":d=function(e){return{frame:t.input[e],value:c(),interpolation:r.AnimationKeyInterpolation.STEP}};break;case"LINEAR":d=function(e){return{frame:t.input[e],value:c()}};break;case"CUBICSPLINE":d=function(e){return{frame:t.input[e],inTangent:c(),value:c(),outTangent:c()}}}for(var h=new Array(t.input.length),p=0;p<t.input.length;p++)h[p]=d(p);if("influence"===n)for(var _=function(e){var t=s.name+"_channel"+s.targetedAnimations.length,o=new r.Animation(t,n,1,a);o.setKeys(h.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}}))),l._forEachPrimitive(u,(function(t){var n=t.morphTargetManager.getTarget(e),r=o.clone();n.animations.push(r),s.addTargetedAnimation(r,n)}))},m=0;m<u._numMorphTargets;m++)_(m);else{var y=s.name+"_channel"+s.targetedAnimations.length,b=new r.Animation(y,n,1,a);b.setKeys(h),null!=i&&null!=i.animations?(i.animations.push(b),s.addTargetedAnimation(b,i)):(u._babylonTransformNode.animations.push(b),s.addTargetedAnimation(b,u._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,n,r){var o=this._extensionsLoadBufferAsync(e,t,n,r);if(o)return o;if(!t._data)if(t.uri)t._data=this.loadUriAsync(e+"/uri",t,t.uri);else{if(!this._bin)throw new Error(e+": Uri is missing or the binary glTF is missing its binary chunk");t._data=this._bin.readAsync(0,t.byteLength)}return t._data.then((function(t){try{return new Uint8Array(t.buffer,t.byteOffset+n,r)}catch(t){throw new Error(e+": "+t.message)}}))},e.prototype.loadBufferViewAsync=function(e,t){var n=this._extensionsLoadBufferViewAsync(e,t);if(n)return n;if(t._data)return t._data;var r=a.Get(e+"/buffer",this._gltf.buffers,t.buffer);return t._data=this._loadBufferAsync("/buffers/"+r.index,r,t.byteOffset||0,t.byteLength),t._data},e.prototype._loadAccessorAsync=function(t,n,o){var s=this;if(n._data)return n._data;var i=e._GetNumComponents(t,n.type),l=i*r.VertexBuffer.GetTypeByteLength(n.componentType),u=i*n.count;if(null==n.bufferView)n._data=Promise.resolve(new o(u));else{var c=a.Get(t+"/bufferView",this._gltf.bufferViews,n.bufferView);n._data=this.loadBufferViewAsync("/bufferViews/"+c.index,c).then((function(a){if(5126!==n.componentType||n.normalized||c.byteStride&&c.byteStride!==l){var s=new o(u);return r.VertexBuffer.ForEach(a,n.byteOffset||0,c.byteStride||l,i,n.componentType,s.length,n.normalized||!1,(function(e,t){s[t]=e})),s}return e._GetTypedArray(t,n.componentType,a,n.byteOffset,u)}))}if(n.sparse){var d=n.sparse;n._data=n._data.then((function(u){var c=u,f=a.Get(t+"/sparse/indices/bufferView",s._gltf.bufferViews,d.indices.bufferView),h=a.Get(t+"/sparse/values/bufferView",s._gltf.bufferViews,d.values.bufferView);return Promise.all([s.loadBufferViewAsync("/bufferViews/"+f.index,f),s.loadBufferViewAsync("/bufferViews/"+h.index,h)]).then((function(a){var s,u=a[0],f=a[1],h=e._GetTypedArray(t+"/sparse/indices",d.indices.componentType,u,d.indices.byteOffset,d.count),p=i*d.count;if(5126!==n.componentType||n.normalized){var _=e._GetTypedArray(t+"/sparse/values",n.componentType,f,d.values.byteOffset,p);s=new o(p),r.VertexBuffer.ForEach(_,0,l,i,n.componentType,s.length,n.normalized||!1,(function(e,t){s[t]=e}))}else s=e._GetTypedArray(t+"/sparse/values",n.componentType,f,d.values.byteOffset,p);for(var m=0,y=0;y<h.length;y++)for(var b=h[y]*i,v=0;v<i;v++)c[b++]=s[m++];return c}))}))}return n._data},e.prototype._loadFloatAccessorAsync=function(e,t){return this._loadAccessorAsync(e,t,Float32Array)},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;if(n.sparse){var r=e._GetTypedArrayConstructor(t+"/componentType",n.componentType);n._data=this._loadAccessorAsync(t,n,r)}else{var o=a.Get(t+"/bufferView",this._gltf.bufferViews,n.bufferView);n._data=this.loadBufferViewAsync("/bufferViews/"+o.index,o).then((function(r){return e._GetTypedArray(t,n.componentType,r,n.byteOffset,n.count)}))}return n._data},e.prototype._loadVertexBufferViewAsync=function(e,t){var n=this;return 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 s=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(s._babylonScene.getEngine(),e,o,!1)}));else if(n.byteOffset&&n.byteOffset%r.VertexBuffer.GetTypeByteLength(n.componentType)!=0)r.Logger.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(s._babylonScene.getEngine(),e,o,!1)}));else if(o===r.VertexBuffer.MatricesIndicesKind||o===r.VertexBuffer.MatricesIndicesExtraKind)n._babylonVertexBuffer=this._loadFloatAccessorAsync("/accessors/"+n.index,n).then((function(e){return new r.VertexBuffer(s._babylonScene.getEngine(),e,o,!1)}));else{var i=a.Get(t+"/bufferView",this._gltf.bufferViews,n.bufferView);n._babylonVertexBuffer=this._loadVertexBufferViewAsync(i,o).then((function(a){var l=e._GetNumComponents(t,n.type);return new r.VertexBuffer(s._babylonScene.getEngine(),a,o,!1,!1,i.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 s=this._extensionsLoadMaterialAsync(t,n,r,o,a);if(s)return s;n._data=n._data||{};var i=n._data[o];if(!i){this.logOpen(t+" "+(n.name||""));var l=this.createMaterial(t,n,o);i={babylonMaterial:l,babylonMeshes:[],promise:this.loadMaterialPropertiesAsync(t,n,l)},n._data[o]=i,e.AddPointerMetadata(l,t),this._parent.onMaterialLoadedObservable.notifyObservers(l),this.logClose()}return r&&(i.babylonMeshes.push(r),r.onDisposeObservable.addOnce((function(){var e=i.babylonMeshes.indexOf(r);-1!==e&&i.babylonMeshes.splice(e,1)}))),a(i.babylonMaterial),i.promise.then((function(){return i.babylonMaterial}))},e.prototype._createDefaultMaterial=function(e,t){this._babylonScene._blockEntityCollection=this._forAssetContainer;var n=new r.PBRMaterial(e,this._babylonScene);return this._babylonScene._blockEntityCollection=!1,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 s=this._extensionsLoadTextureInfoAsync(t,n,r);if(s)return s;if(this.logOpen(""+t),n.texCoord>=2)throw new Error(t+"/texCoord: Invalid value ("+n.texCoord+")");var i=a.Get(t+"/index",this._gltf.textures,n.index),l=this._loadTextureAsync("/textures/"+n.index,i,(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,r){void 0===r&&(r=function(){});var o=this._extensionsLoadTextureAsync(t,n,r);if(o)return o;this.logOpen(t+" "+(n.name||""));var s=null==n.sampler?e.DefaultSampler:a.Get(t+"/sampler",this._gltf.samplers,n.sampler),i=a.Get(t+"/source",this._gltf.images,n.source),l=this._createTextureAsync(t,s,i,r);return this.logClose(),l},e.prototype._createTextureAsync=function(e,t,n,o){var a=this;void 0===o&&(o=function(){});var s=this._loadSampler("/samplers/"+t.index,t),i=new Array,l=new r.Deferred;this._babylonScene._blockEntityCollection=this._forAssetContainer;var u=new r.Texture(null,this._babylonScene,s.noMipMaps,!1,s.samplingMode,(function(){a._disposed||l.resolve()}),(function(t,n){a._disposed||l.reject(new Error(e+": "+(n&&n.message?n.message:t||"Failed to load texture")))}),void 0,void 0,void 0,n.mimeType);return this._babylonScene._blockEntityCollection=!1,i.push(l.promise),i.push(this.loadImageAsync("/images/"+n.index,n).then((function(e){var t=n.uri||a._fileName+"#image"+n.index,r="data:"+a._uniqueRootUrl+t;u.updateURL(r,e)}))),u.wrapU=s.wrapU,u.wrapV=s.wrapV,o(u),Promise.all(i).then((function(){return u}))},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,o){var a=this,s=this._extensionsLoadUriAsync(t,n,o);if(s)return s;if(!e._ValidateUri(o))throw new Error(t+": '"+o+"' is invalid");if(r.Tools.IsBase64(o)){var i=new Uint8Array(r.Tools.DecodeBase64(o));return this.log("Decoded "+o.substr(0,64)+"... ("+i.length+" bytes)"),Promise.resolve(i)}return this.log("Loading "+o),this._parent.preprocessUrlAsync(this._rootUrl+o).then((function(e){return new Promise((function(n,s){a._parent._loadFile(e,a._babylonScene,(function(e){a._disposed||(a.log("Loaded "+o+" ("+e.byteLength+" bytes)"),n(new Uint8Array(e)))}),!0,(function(e){s(new r.LoadFileError(t+": Failed to load '"+o+"'"+(e?": "+e.status+" "+e.statusText:""),e))}))}))}))},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.Logger.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.Logger.Warn(e+"/minFilter: Invalid value ("+o+")"),r.Texture.LINEAR_LINEAR_MIPLINEAR}else switch(9728!==n&&r.Logger.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.Logger.Warn(e+"/minFilter: Invalid value ("+o+")"),r.Texture.NEAREST_NEAREST_MIPNEAREST}},e._GetTypedArrayConstructor=function(e,t){switch(t){case 5120:return Int8Array;case 5121:return Uint8Array;case 5122:return Int16Array;case 5123:return Uint16Array;case 5125:return Uint32Array;case 5126:return Float32Array;default:throw new Error(e+": Invalid component type "+t)}},e._GetTypedArray=function(t,n,r,o,a){var s=r.buffer;o=r.byteOffset+(o||0);var i=e._GetTypedArrayConstructor(t+"/componentType",n);try{return new i(s,o,a)}catch(e){throw new Error(t+": "+e)}},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 s=o._data[a],i=0,l=s.babylonMeshes;i<l.length;i++){var u=l[i];u.computeWorldMatrix(!0);var c=s.babylonMaterial;t.push(c.forceCompilationAsync(u)),t.push(c.forceCompilationAsync(u,{useInstances:!0})),this._parent.useClipPlane&&(t.push(c.forceCompilationAsync(u,{clipPlane:!0})),t.push(c.forceCompilationAsync(u,{clipPlane:!0,useInstances:!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(e){for(var t=0,n=this._extensions;t<n.length;t++){var r=n[t];r.enabled&&e(r)}},e.prototype._applyExtensions=function(e,t,n){for(var r=0,o=this._extensions;r<o.length;r++){var a=o[r];if(a.enabled){var s=a.name+"."+t,i=e;i._activeLoaderExtensionFunctions=i._activeLoaderExtensionFunctions||{};var l=i._activeLoaderExtensionFunctions;if(!l[s]){l[s]=!0;try{var u=n(a);if(u)return u}finally{delete l[s]}}}}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._extensionsLoadMeshPrimitiveAsync=function(e,t,n,r,o,a){return this._applyExtensions(o,"loadMeshPrimitive",(function(s){return s._loadMeshPrimitiveAsync&&s._loadMeshPrimitiveAsync(e,t,n,r,o,a)}))},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._extensionsLoadTextureAsync=function(e,t,n){return this._applyExtensions(t,"loadTexture",(function(r){return r._loadTextureAsync&&r._loadTextureAsync(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._extensionsLoadSkinAsync=function(e,t,n){return this._applyExtensions(n,"loadSkin",(function(r){return r._loadSkinAsync&&r._loadSkinAsync(e,t,n)}))},e.prototype._extensionsLoadUriAsync=function(e,t,n){return this._applyExtensions(t,"loadUri",(function(r){return r._loadUriAsync&&r._loadUriAsync(e,t,n)}))},e.prototype._extensionsLoadBufferViewAsync=function(e,t){return this._applyExtensions(t,"loadBufferView",(function(n){return n.loadBufferViewAsync&&n.loadBufferViewAsync(e,t)}))},e.prototype._extensionsLoadBufferAsync=function(e,t,n,r){return this._applyExtensions(t,"loadBuffer",(function(o){return o.loadBufferAsync&&o.loadBufferAsync(e,t,n,r)}))},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.isExtensionUsed=function(e){return!!this._gltf.extensionsUsed&&-1!==this._gltf.extensionsUsed.indexOf(e)},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._RegisteredExtensions={},e.DefaultSampler={index:-1},e}();o.GLTFFileLoader._CreateGLTF2Loader=function(e){return new s(e)}},function(e,t,n){"use strict";n.r(t),n.d(t,"GLTFLoaderCoordinateSystemMode",(function(){return r})),n.d(t,"GLTFLoaderAnimationStartMode",(function(){return o})),n.d(t,"GLTFLoaderState",(function(){return a})),n.d(t,"GLTFFileLoader",(function(){return l}));var r,o,a,s=n(0),i=n(3);!function(e){e[e.AUTO=0]="AUTO",e[e.FORCE_RIGHT_HANDED=1]="FORCE_RIGHT_HANDED"}(r||(r={})),function(e){e[e.NONE=0]="NONE",e[e.FIRST=1]="FIRST",e[e.ALL=2]="ALL"}(o||(o={})),function(e){e[e.LOADING=0]="LOADING",e[e.READY=1]="READY",e[e.COMPLETE=2]="COMPLETE"}(a||(a={}));var l=function(){function e(){this.onParsedObservable=new s.Observable,this.coordinateSystemMode=r.AUTO,this.animationStartMode=o.FIRST,this.compileMaterials=!1,this.useClipPlane=!1,this.compileShadowGenerators=!1,this.transparencyAsCoverage=!1,this.useRangeRequests=!1,this.createInstances=!0,this.alwaysComputeBoundingBox=!1,this.loadAllMaterials=!1,this.preprocessUrlAsync=function(e){return Promise.resolve(e)},this.onMeshLoadedObservable=new s.Observable,this.onTextureLoadedObservable=new s.Observable,this.onMaterialLoadedObservable=new s.Observable,this.onCameraLoadedObservable=new s.Observable,this.onCompleteObservable=new s.Observable,this.onErrorObservable=new s.Observable,this.onDisposeObservable=new s.Observable,this.onExtensionLoadedObservable=new s.Observable,this.validate=!1,this.onValidatedObservable=new s.Observable,this._loader=null,this._requests=new Array,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:!1,configurable:!0}),Object.defineProperty(e.prototype,"onMeshLoaded",{set:function(e){this._onMeshLoadedObserver&&this.onMeshLoadedObservable.remove(this._onMeshLoadedObserver),this._onMeshLoadedObserver=this.onMeshLoadedObservable.add(e)},enumerable:!1,configurable:!0}),Object.defineProperty(e.prototype,"onTextureLoaded",{set:function(e){this._onTextureLoadedObserver&&this.onTextureLoadedObservable.remove(this._onTextureLoadedObserver),this._onTextureLoadedObserver=this.onTextureLoadedObservable.add(e)},enumerable:!1,configurable:!0}),Object.defineProperty(e.prototype,"onMaterialLoaded",{set:function(e){this._onMaterialLoadedObserver&&this.onMaterialLoadedObservable.remove(this._onMaterialLoadedObserver),this._onMaterialLoadedObserver=this.onMaterialLoadedObservable.add(e)},enumerable:!1,configurable:!0}),Object.defineProperty(e.prototype,"onCameraLoaded",{set:function(e){this._onCameraLoadedObserver&&this.onCameraLoadedObservable.remove(this._onCameraLoadedObserver),this._onCameraLoadedObserver=this.onCameraLoadedObservable.add(e)},enumerable:!1,configurable:!0}),Object.defineProperty(e.prototype,"onComplete",{set:function(e){this._onCompleteObserver&&this.onCompleteObservable.remove(this._onCompleteObserver),this._onCompleteObserver=this.onCompleteObservable.add(e)},enumerable:!1,configurable:!0}),Object.defineProperty(e.prototype,"onError",{set:function(e){this._onErrorObserver&&this.onErrorObservable.remove(this._onErrorObserver),this._onErrorObserver=this.onErrorObservable.add(e)},enumerable:!1,configurable:!0}),Object.defineProperty(e.prototype,"onDispose",{set:function(e){this._onDisposeObserver&&this.onDisposeObservable.remove(this._onDisposeObserver),this._onDisposeObserver=this.onDisposeObservable.add(e)},enumerable:!1,configurable:!0}),Object.defineProperty(e.prototype,"onExtensionLoaded",{set:function(e){this._onExtensionLoadedObserver&&this.onExtensionLoadedObservable.remove(this._onExtensionLoadedObserver),this._onExtensionLoadedObserver=this.onExtensionLoadedObservable.add(e)},enumerable:!1,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:!1,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:!1,configurable:!0}),Object.defineProperty(e.prototype,"onValidated",{set:function(e){this._onValidatedObserver&&this.onValidatedObservable.remove(this._onValidatedObserver),this._onValidatedObserver=this.onValidatedObservable.add(e)},enumerable:!1,configurable:!0}),e.prototype.dispose=function(){this._loader&&(this._loader.dispose(),this._loader=null);for(var e=0,t=this._requests;e<t.length;e++){t[e].abort()}this._requests.length=0,delete this._progressCallback,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(),this.onDisposeObservable.notifyObservers(void 0),this.onDisposeObservable.clear()},e.prototype.requestFile=function(e,t,n,r,o,a){var i=this;if(this._progressCallback=r,o){if(this.useRangeRequests){this.validate&&s.Logger.Warn("glTF validation is not supported when range requests are enabled");var l={abort:function(){},onCompleteObservable:new s.Observable},u={readAsync:function(n,r){return new Promise((function(o,a){i._requestFile(t,e,(function(e){o(new Uint8Array(e))}),!0,(function(e){a(e)}),(function(e){e.setRequestHeader("Range","bytes="+n+"-"+(n+r-1))}))}))},byteLength:0};return this._unpackBinaryAsync(new s.DataReader(u)).then((function(e){l.onCompleteObservable.notifyObservers(l),n(e)}),a),l}return this._requestFile(t,e,(function(e,t){var r=e;i._unpackBinaryAsync(new s.DataReader({readAsync:function(e,t){return Promise.resolve(new Uint8Array(r,e,t))},byteLength:r.byteLength})).then((function(e){n(e,t)}),a)}),!0,a)}return this._requestFile(t,e,(function(r,o){i._validate(e,r,s.Tools.GetFolderPath(t),s.Tools.GetFilename(t)),n({json:i._parseJson(r)},o)}),o,a)},e.prototype.readFile=function(e,t,n,r,o,a){var i=this;return e._readFile(t,(function(r){if(i._validate(e,r,"file:",t.name),o){var l=r;i._unpackBinaryAsync(new s.DataReader({readAsync:function(e,t){return Promise.resolve(new Uint8Array(l,e,t))},byteLength:l.byteLength})).then(n,a)}else n({json:i._parseJson(r)})}),r,o,a)},e.prototype.importMeshAsync=function(e,t,n,r,o,a){var s=this;return Promise.resolve().then((function(){return s.onParsedObservable.notifyObservers(n),s.onParsedObservable.clear(),s._log("Loading "+(a||"")),s._loader=s._getLoader(n),s._loader.importMeshAsync(e,t,!1,n,r,o,a)}))},e.prototype.loadAsync=function(e,t,n,r,o){var a=this;return Promise.resolve().then((function(){return a.onParsedObservable.notifyObservers(t),a.onParsedObservable.clear(),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 Promise.resolve().then((function(){a.onParsedObservable.notifyObservers(t),a.onParsedObservable.clear(),a._log("Loading "+(o||"")),a._loader=a._getLoader(t);var i=new s.AssetContainer(e),l=[];a.onMaterialLoadedObservable.add((function(e){l.push(e),e.onDisposeObservable.addOnce((function(){var t=i.materials.indexOf(e);t>-1&&i.materials.splice(t,1),(t=l.indexOf(e))>-1&&l.splice(t,1)}))}));var u=[];a.onTextureLoadedObservable.add((function(e){u.push(e),e.onDisposeObservable.addOnce((function(){var t=i.textures.indexOf(e);t>-1&&i.textures.splice(t,1),(t=u.indexOf(e))>-1&&u.splice(t,1)}))}));var c=[];return a.onCameraLoadedObservable.add((function(e){c.push(e)})),a._loader.importMeshAsync(null,e,!0,t,n,r,o).then((function(e){return Array.prototype.push.apply(i.meshes,e.meshes),Array.prototype.push.apply(i.particleSystems,e.particleSystems),Array.prototype.push.apply(i.skeletons,e.skeletons),Array.prototype.push.apply(i.animationGroups,e.animationGroups),Array.prototype.push.apply(i.materials,l),Array.prototype.push.apply(i.textures,u),Array.prototype.push.apply(i.lights,e.lights),Array.prototype.push.apply(i.transformNodes,e.transformNodes),Array.prototype.push.apply(i.cameras,c),i}))}))},e.prototype.canDirectLoad=function(t){return-1!==t.indexOf("asset")&&-1!==t.indexOf("version")||s.StringTools.StartsWith(t,"data:base64,"+e.magicBase64Encoded)||s.StringTools.StartsWith(t,"data:application/octet-stream;base64,"+e.magicBase64Encoded)||s.StringTools.StartsWith(t,"data:model/gltf-binary;base64,"+e.magicBase64Encoded)},e.prototype.directLoad=function(t,n){if(s.StringTools.StartsWith(n,"base64,"+e.magicBase64Encoded)||s.StringTools.StartsWith(n,"application/octet-stream;base64,"+e.magicBase64Encoded)||s.StringTools.StartsWith(n,"model/gltf-binary;base64,"+e.magicBase64Encoded)){var r=s.Tools.DecodeBase64(n);return this._validate(t,r),this._unpackBinaryAsync(new s.DataReader({readAsync:function(e,t){return Promise.resolve(new Uint8Array(r,e,t))},byteLength:r.byteLength}))}return this._validate(t,n),Promise.resolve({json:this._parseJson(n)})},e.prototype.createPlugin=function(){return new e},Object.defineProperty(e.prototype,"loaderState",{get:function(){return this._loader?this._loader.state:null},enumerable:!1,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._loadFile=function(e,t,n,r,o){var a=this,s=t._loadFile(e,n,(function(e){a._onProgress(e,s)}),void 0,r,o);return s.onCompleteObservable.add((function(e){a._requests.splice(a._requests.indexOf(e),1)})),this._requests.push(s),s},e.prototype._requestFile=function(e,t,n,r,o,a){var s=this,i=t._requestFile(e,n,(function(e){s._onProgress(e,i)}),void 0,r,o,a);return i.onCompleteObservable.add((function(e){s._requests.splice(s._requests.indexOf(e),1)})),this._requests.push(i),i},e.prototype._onProgress=function(e,t){if(this._progressCallback){t._lengthComputable=e.lengthComputable,t._loaded=e.loaded,t._total=e.total;for(var n=!0,r=0,o=0,a=0,s=this._requests;a<s.length;a++){var i=s[a];if(void 0===i._lengthComputable||void 0===i._loaded||void 0===i._total)return;n=n&&i._lengthComputable,r+=i._loaded,o+=i._total}this._progressCallback({lengthComputable:n,loaded:r,total:n?o:0})}},e.prototype._validate=function(e,t,n,r){var o=this;void 0===n&&(n=""),void 0===r&&(r=""),this.validate&&(this._startPerformanceCounter("Validate JSON"),i.GLTFValidation.ValidateAsync(t,n,r,(function(t){return o.preprocessUrlAsync(n+t).then((function(t){return e._loadFileAsync(t,void 0,!0,!0)}))})).then((function(e){o._endPerformanceCounter("Validate JSON"),o.onValidatedObservable.notifyObservers(e),o.onValidatedObservable.clear()}),(function(e){o._endPerformanceCounter("Validate JSON"),s.Tools.Warn("Failed to validate: "+e.message),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._parseJson=function(e){this._startPerformanceCounter("Parse JSON"),this._log("JSON length: "+e.length);var t=JSON.parse(e);return this._endPerformanceCounter("Parse JSON"),t},e.prototype._unpackBinaryAsync=function(e){var t=this;return this._startPerformanceCounter("Unpack Binary"),e.loadAsync(20).then((function(){var n=e.readUint32();if(1179937895!==n)throw new Error("Unexpected magic: "+n);var r=e.readUint32();t.loggingEnabled&&t._log("Binary version: "+r);var o,a=e.readUint32();if(0!==e.buffer.byteLength&&a!==e.buffer.byteLength)throw new Error("Length in header does not match actual data length: "+a+" != "+e.buffer.byteLength);switch(r){case 1:o=t._unpackBinaryV1Async(e,a);break;case 2:o=t._unpackBinaryV2Async(e,a);break;default:throw new Error("Unsupported version: "+r)}return t._endPerformanceCounter("Unpack Binary"),o}))},e.prototype._unpackBinaryV1Async=function(e,t){var n=e.readUint32(),r=e.readUint32();if(0!==r)throw new Error("Unexpected content format: "+r);var o=t-e.byteOffset,a={json:this._parseJson(e.readString(n)),bin:null};if(0!==o){var s=e.byteOffset;a.bin={readAsync:function(t,n){return e.buffer.readAsync(s+t,n)},byteLength:o}}return Promise.resolve(a)},e.prototype._unpackBinaryV2Async=function(e,t){var n=this,r=1313821514,o=5130562,a=e.readUint32();if(e.readUint32()!==r)throw new Error("First chunk format is not JSON");return e.byteOffset+a===t?e.loadAsync(a).then((function(){return{json:n._parseJson(e.readString(a)),bin:null}})):e.loadAsync(a+8).then((function(){var s={json:n._parseJson(e.readString(a)),bin:null},i=function(){var n=e.readUint32();switch(e.readUint32()){case r:throw new Error("Unexpected JSON chunk");case o:var a=e.byteOffset;s.bin={readAsync:function(t,n){return e.buffer.readAsync(a+t,n)},byteLength:n},e.skipBytes(n);break;default:e.skipBytes(n)}return e.byteOffset!==t?e.loadAsync(8).then(i):Promise.resolve(s)};return i()}))},e._parseVersion=function(e){if("1.0"===e||"1.0.1"===e)return{major:1,minor:0};var t=(e+"").match(/^(\d+)\.(\d+)/);return 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/*! *****************************************************************************
Copyright (c) Microsoft Corporation.

Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted.

THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
PERFORMANCE OF THIS SOFTWARE.
***************************************************************************** */
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)Object.prototype.hasOwnProperty.call(t,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=function(){return(a=Object.assign||function(e){for(var t,n=1,r=arguments.length;n<r;n++)for(var o in t=arguments[n])Object.prototype.hasOwnProperty.call(t,o)&&(e[o]=t[o]);return e}).apply(this,arguments)};Object.create;Object.create},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)},function(e,t,n){"use strict";n.r(t),n.d(t,"EXT_lights_image_based",(function(){return s})),n.d(t,"EXT_mesh_gpu_instancing",(function(){return i})),n.d(t,"EXT_texture_webp",(function(){return 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r=n(0),o=n(1),a="EXT_lights_image_based",s=function(){function e(e){this.name=a,this._loader=e,this.enabled=this._loader.isExtensionUsed(a)}return e.prototype.dispose=function(){this._loader=null,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 s=new Array;s.push(n._loader.loadSceneAsync(e,t)),n._loader.logOpen(""+r);var i=o.a.Get(r+"/light",n._lights,a.light);return s.push(n._loadLightAsync("/extensions/"+n.name+"/lights/"+a.light,i).then((function(e){n._loader.babylonScene.environmentTexture=e}))),n._loader.logClose(),Promise.all(s).then((function(){}))}))},e.prototype._loadLightAsync=function(e,t){var n=this;if(!t._loaded){var a=new Array;this._loader.logOpen(""+e);for(var s=new Array(t.specularImages.length),i=function(n){var r=t.specularImages[n];s[n]=new 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e.updateRGBDAsync(s,i,l)}))}return t._loaded.then((function(){return t._babylonTexture}))},e}();o.b.RegisterExtension(a,(function(e){return new s(e)}));var i=function(){function e(e){this.name="EXT_mesh_gpu_instancing",this._loader=e,this.enabled=this._loader.isExtensionUsed("EXT_mesh_gpu_instancing")}return e.prototype.dispose=function(){this._loader=null},e.prototype.loadNodeAsync=function(e,t,n){var a=this;return o.b.LoadExtensionAsync(e,t,this.name,(function(e,s){a._loader._disableInstancedMesh++;var i=a._loader.loadNodeAsync("/nodes/"+t.index,t,n);if(a._loader._disableInstancedMesh--,!t._primitiveBabylonMeshes)return i;var l=new Array,u=0,c=function(t){if(null!=s.attributes[t]){var n=o.a.Get(e+"/attributes/"+t,a._loader.gltf.accessors,s.attributes[t]);if(l.push(a._loader._loadFloatAccessorAsync("/accessors/"+n.bufferView,n)),0===u)u=n.count;else if(u!==n.count)throw new Error(e+"/attributes: Instance buffer accessors do not have the same count.")}else 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e(e){this.name="EXT_texture_webp",this._loader=e,this.enabled=e.isExtensionUsed("EXT_texture_webp")}return e.prototype.dispose=function(){this._loader=null},e.prototype._loadTextureAsync=function(e,t,n){var r=this;return o.b.LoadExtensionAsync(e,t,this.name,(function(a,s){var i=null==t.sampler?o.b.DefaultSampler:o.a.Get(e+"/sampler",r._loader.gltf.samplers,t.sampler),l=o.a.Get(a+"/source",r._loader.gltf.images,s.source);return r._loader._createTextureAsync(e,i,l,(function(e){n(e)}))}))},e}();o.b.RegisterExtension("EXT_texture_webp",(function(e){return new l(e)}));var u=function(){function e(e){this.name="KHR_draco_mesh_compression",this._loader=e,this.enabled=r.DracoCompression.DecoderAvailable&&this._loader.isExtensionUsed("KHR_draco_mesh_compression")}return e.prototype.dispose=function(){delete this.dracoCompression,this._loader=null},e.prototype._loadVertexDataAsync=function(e,t,n){var a=this;return o.b.LoadExtensionAsync(e,t,this.name,(function(s,i){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=i.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(s,a._loader.gltf.bufferViews,i.bufferView);return c._dracoBabylonGeometry||(c._dracoBabylonGeometry=a._loader.loadBufferViewAsync("/bufferViews/"+c.index,c).then((function(t){return(a.dracoCompression||r.DracoCompression.Default).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("KHR_draco_mesh_compression",(function(e){return new u(e)}));var c=function(){function e(e){this.name="KHR_lights_punctual",this._loader=e,this.enabled=this._loader.isExtensionUsed("KHR_lights_punctual")}return e.prototype.dispose=function(){this._loader=null,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(s,i){return a._loader.loadNodeAsync(e,t,(function(e){var t,l=o.a.Get(s,a._lights,i.light),u=l.name||e.name;switch(a._loader.babylonScene._blockEntityCollection=a._loader._forAssetContainer,l.type){case"directional":t=new r.DirectionalLight(u,r.Vector3.Backward(),a._loader.babylonScene);break;case"point":t=new r.PointLight(u,r.Vector3.Zero(),a._loader.babylonScene);break;case"spot":var c=new r.SpotLight(u,r.Vector3.Zero(),r.Vector3.Backward(),0,1,a._loader.babylonScene);c.angle=2*(l.spot&&l.spot.outerConeAngle||Math.PI/4),c.innerAngle=2*(l.spot&&l.spot.innerConeAngle||0),t=c;break;default:throw a._loader.babylonScene._blockEntityCollection=!1,new Error(s+": Invalid light type ("+l.type+")")}a._loader.babylonScene._blockEntityCollection=!1,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,a._loader._babylonLights.push(t),o.b.AddPointerMetadata(t,s),n(e)}))}))},e}();o.b.RegisterExtension("KHR_lights_punctual",(function(e){return new c(e)}));var d=function(){function e(e){this.name="KHR_materials_pbrSpecularGlossiness",this.order=200,this._loader=e,this.enabled=this._loader.isExtensionUsed("KHR_materials_pbrSpecularGlossiness")}return e.prototype.dispose=function(){this._loader=null},e.prototype.loadMaterialPropertiesAsync=function(e,t,n){var r=this;return o.b.LoadExtensionAsync(e,t,this.name,(function(o,a){var s=new Array;return s.push(r._loader.loadMaterialBasePropertiesAsync(e,t,n)),s.push(r._loadSpecularGlossinessPropertiesAsync(o,t,a,n)),r._loader.loadMaterialAlphaProperties(e,t,n),Promise.all(s).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("KHR_materials_pbrSpecularGlossiness",(function(e){return new d(e)}));var f=function(){function e(e){this.name="KHR_materials_unlit",this.order=210,this._loader=e,this.enabled=this._loader.isExtensionUsed("KHR_materials_unlit")}return e.prototype.dispose=function(){this._loader=null},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("KHR_materials_unlit",(function(e){return new f(e)}));var h=function(){function e(e){this.name="KHR_materials_clearcoat",this.order=190,this._loader=e,this.enabled=this._loader.isExtensionUsed("KHR_materials_clearcoat")}return e.prototype.dispose=function(){this._loader=null},e.prototype.loadMaterialPropertiesAsync=function(e,t,n){var r=this;return o.b.LoadExtensionAsync(e,t,this.name,(function(o,a){var s=new Array;return s.push(r._loader.loadMaterialPropertiesAsync(e,t,n)),s.push(r._loadClearCoatPropertiesAsync(o,a,n)),Promise.all(s).then((function(){}))}))},e.prototype._loadClearCoatPropertiesAsync=function(e,t,n){if(!(n instanceof r.PBRMaterial))throw new Error(e+": Material type not supported");var o=new Array;return n.clearCoat.isEnabled=!0,n.clearCoat.useRoughnessFromMainTexture=!1,n.clearCoat.remapF0OnInterfaceChange=!1,null!=t.clearcoatFactor?n.clearCoat.intensity=t.clearcoatFactor:n.clearCoat.intensity=0,t.clearcoatTexture&&o.push(this._loader.loadTextureInfoAsync(e+"/clearcoatTexture",t.clearcoatTexture,(function(e){e.name=n.name+" (ClearCoat Intensity)",n.clearCoat.texture=e}))),null!=t.clearcoatRoughnessFactor?n.clearCoat.roughness=t.clearcoatRoughnessFactor:n.clearCoat.roughness=0,t.clearcoatRoughnessTexture&&o.push(this._loader.loadTextureInfoAsync(e+"/clearcoatRoughnessTexture",t.clearcoatRoughnessTexture,(function(e){e.name=n.name+" (ClearCoat Roughness)",n.clearCoat.textureRoughness=e}))),t.clearcoatNormalTexture&&(o.push(this._loader.loadTextureInfoAsync(e+"/clearcoatNormalTexture",t.clearcoatNormalTexture,(function(e){e.name=n.name+" (ClearCoat Normal)",n.clearCoat.bumpTexture=e}))),n.invertNormalMapX=!n.getScene().useRightHandedSystem,n.invertNormalMapY=n.getScene().useRightHandedSystem,null!=t.clearcoatNormalTexture.scale&&(n.clearCoat.bumpTexture.level=t.clearcoatNormalTexture.scale)),Promise.all(o).then((function(){}))},e}();o.b.RegisterExtension("KHR_materials_clearcoat",(function(e){return new h(e)}));var p=function(){function e(e){this.name="KHR_materials_sheen",this.order=190,this._loader=e,this.enabled=this._loader.isExtensionUsed("KHR_materials_sheen")}return e.prototype.dispose=function(){this._loader=null},e.prototype.loadMaterialPropertiesAsync=function(e,t,n){var r=this;return o.b.LoadExtensionAsync(e,t,this.name,(function(o,a){var s=new Array;return s.push(r._loader.loadMaterialPropertiesAsync(e,t,n)),s.push(r._loadSheenPropertiesAsync(o,a,n)),Promise.all(s).then((function(){}))}))},e.prototype._loadSheenPropertiesAsync=function(e,t,n){if(!(n instanceof r.PBRMaterial))throw new Error(e+": Material type not supported");var o=new Array;return n.sheen.isEnabled=!0,n.sheen.intensity=1,null!=t.sheenColorFactor?n.sheen.color=r.Color3.FromArray(t.sheenColorFactor):n.sheen.color=r.Color3.Black(),t.sheenColorTexture&&o.push(this._loader.loadTextureInfoAsync(e+"/sheenColorTexture",t.sheenColorTexture,(function(e){e.name=n.name+" (Sheen Color)",n.sheen.texture=e}))),void 0!==t.sheenRoughnessFactor?n.sheen.roughness=t.sheenRoughnessFactor:n.sheen.roughness=0,t.sheenRoughnessTexture&&o.push(this._loader.loadTextureInfoAsync(e+"/sheenRoughnessTexture",t.sheenRoughnessTexture,(function(e){e.name=n.name+" (Sheen Roughness)",n.sheen.textureRoughness=e}))),n.sheen.albedoScaling=!0,n.sheen.useRoughnessFromMainTexture=!1,Promise.all(o).then((function(){}))},e}();o.b.RegisterExtension("KHR_materials_sheen",(function(e){return new p(e)}));var _=function(){function e(e){this.name="KHR_materials_specular",this.order=190,this._loader=e,this.enabled=this._loader.isExtensionUsed("KHR_materials_specular")}return e.prototype.dispose=function(){this._loader=null},e.prototype.loadMaterialPropertiesAsync=function(e,t,n){var r=this;return o.b.LoadExtensionAsync(e,t,this.name,(function(o,a){var s=new Array;return s.push(r._loader.loadMaterialPropertiesAsync(e,t,n)),s.push(r._loadSpecularPropertiesAsync(o,a,n)),Promise.all(s).then((function(){}))}))},e.prototype._loadSpecularPropertiesAsync=function(e,t,n){if(!(n instanceof r.PBRMaterial))throw new Error(e+": Material type not supported");var o=new Array;return void 0!==t.specularFactor&&(n.metallicF0Factor=t.specularFactor),void 0!==t.specularColorFactor&&(n.metallicReflectanceColor=r.Color3.FromArray(t.specularColorFactor)),t.specularTexture&&o.push(this._loader.loadTextureInfoAsync(e+"/specularTexture",t.specularTexture,(function(e){e.name=n.name+" (Specular F0 Color)",n.metallicReflectanceTexture=e}))),Promise.all(o).then((function(){}))},e}();o.b.RegisterExtension("KHR_materials_specular",(function(e){return new _(e)}));var m=function(){function e(e){this.name="KHR_materials_ior",this.order=180,this._loader=e,this.enabled=this._loader.isExtensionUsed("KHR_materials_ior")}return e.prototype.dispose=function(){this._loader=null},e.prototype.loadMaterialPropertiesAsync=function(e,t,n){var r=this;return o.b.LoadExtensionAsync(e,t,this.name,(function(o,a){var s=new Array;return s.push(r._loader.loadMaterialPropertiesAsync(e,t,n)),s.push(r._loadIorPropertiesAsync(o,a,n)),Promise.all(s).then((function(){}))}))},e.prototype._loadIorPropertiesAsync=function(t,n,o){if(!(o instanceof r.PBRMaterial))throw new Error(t+": Material type not supported");return void 0!==n.ior?o.indexOfRefraction=n.ior:o.indexOfRefraction=e._DEFAULT_IOR,Promise.resolve()},e._DEFAULT_IOR=1.5,e}();o.b.RegisterExtension("KHR_materials_ior",(function(e){return new m(e)}));var y=function(){function e(e){this.name="KHR_materials_variants",this._loader=e,this.enabled=this._loader.isExtensionUsed("KHR_materials_variants")}return e.prototype.dispose=function(){this._loader=null},e.GetAvailableVariants=function(e){var t=this._GetExtensionMetadata(e);return t?Object.keys(t.variants):[]},e.prototype.getAvailableVariants=function(t){return e.GetAvailableVariants(t)},e.SelectVariant=function(e,t){var n=this._GetExtensionMetadata(e);if(!n)throw new Error("Cannot select variant on a glTF mesh that does not have the KHR_materials_variants extension");var r=function(e){var t=n.variants[e];if(t)for(var r=0,o=t;r<o.length;r++){var a=o[r];a.mesh.material=a.material}};if(t instanceof Array)for(var o=0,a=t;o<a.length;o++){r(a[o])}else r(t);n.lastSelected=t},e.prototype.selectVariant=function(t,n){return e.SelectVariant(t,n)},e.Reset=function(e){var t=this._GetExtensionMetadata(e);if(!t)throw new Error("Cannot reset on a glTF mesh that does not have the KHR_materials_variants extension");for(var n=0,r=t.original;n<r.length;n++){var o=r[n];o.mesh.material=o.material}t.lastSelected=null},e.prototype.reset=function(t){return e.Reset(t)},e.GetLastSelectedVariant=function(e){var t=this._GetExtensionMetadata(e);if(!t)throw new Error("Cannot get the last selected variant on a glTF mesh that does not have the KHR_materials_variants extension");return t.lastSelected},e.prototype.getLastSelectedVariant=function(t){return e.GetLastSelectedVariant(t)},e._GetExtensionMetadata=function(e){var t,n;return(null===(n=null===(t=null==e?void 0:e.metadata)||void 0===t?void 0:t.gltf)||void 0===n?void 0:n.KHR_materials_variants)||null},e.prototype.onLoading=function(){var e=this._loader.gltf.extensions;if(e&&e[this.name]){var t=e[this.name];this._variants=t.variants}},e.prototype._loadMeshPrimitiveAsync=function(e,t,n,a,s,i){var l=this;return o.b.LoadExtensionAsync(e,s,this.name,(function(u,c){var d=new Array;return d.push(l._loader._loadMeshPrimitiveAsync(e,t,n,a,s,(function(t){if(i(t),t instanceof r.Mesh){var n=o.b._GetDrawMode(e,s.mode),a=l._loader.rootBabylonMesh,f=a.metadata=a.metadata||{},h=f.gltf=f.gltf||{},p=h.KHR_materials_variants=h.KHR_materials_variants||{lastSelected:null,original:[],variants:{}};p.original.push({mesh:t,material:t.material});for(var _=p.variants,m=0,y=c.mappings;m<y.length;m++)for(var b=y[m],v=function(e){var r=o.a.Get(u+"/mapping/"+e,l._variants,e),a=o.a.Get("#/materials/",l._loader.gltf.materials,b.material);d.push(l._loader._loadMaterialAsync("#/materials/"+b.material,a,t,n,(function(e){_[r.name]=_[r.name]||[],_[r.name].push({mesh:t,material:e})})))},g=0,A=b.variants;g<A.length;g++){v(A[g])}}}))),Promise.all(d).then((function(e){return e[0]}))}))},e}();o.b.RegisterExtension("KHR_materials_variants",(function(e){return new y(e)}));var b=n(4),v=function(){function e(t,n){var o=this;this._opaqueRenderTarget=null,this._opaqueMeshesCache=[],this._transparentMeshesCache=[],this._options=Object(b.a)(Object(b.a)({},e._getDefaultOptions()),t),this._scene=n,this._scene._transmissionHelper=this,this.onErrorObservable=new r.Observable,this._scene.onDisposeObservable.addOnce((function(e){o.dispose()})),this._parseScene(),this._setupRenderTargets()}return e._getDefaultOptions=function(){return{renderSize:512}},e.prototype.updateOptions=function(e){var t=this;if(Object.keys(e).filter((function(n){return t._options[n]!==e[n]})).length){var n=Object(b.a)(Object(b.a)({},this._options),e),r=this._options;this._options=n,n.renderSize!==r.renderSize&&this._setupRenderTargets()}},e.prototype.getOpaqueTarget=function(){return this._opaqueRenderTarget},e.prototype.shouldRenderAsTransmission=function(e){return!!e&&!!(e instanceof r.PBRMaterial&&e.subSurface.isRefractionEnabled)},e.prototype._addMesh=function(e){e instanceof r.Mesh&&(e.onMaterialChangedObservable.add(this.onMeshMaterialChanged.bind(this)),this.shouldRenderAsTransmission(e.material)?this._transparentMeshesCache.push(e):this._opaqueMeshesCache.push(e))},e.prototype._removeMesh=function(e){if(e instanceof r.Mesh){e.onMaterialChangedObservable.remove(this.onMeshMaterialChanged.bind(this));var t=this._transparentMeshesCache.indexOf(e);-1!==t&&this._transparentMeshesCache.splice(t,1),-1!==(t=this._opaqueMeshesCache.indexOf(e))&&this._opaqueMeshesCache.splice(t,1)}},e.prototype._parseScene=function(){this._scene.meshes.forEach(this._addMesh.bind(this)),this._scene.onNewMeshAddedObservable.add(this._addMesh.bind(this)),this._scene.onMeshRemovedObservable.add(this._removeMesh.bind(this))},e.prototype.onMeshMaterialChanged=function(e){if(e instanceof r.Mesh){var t=this._transparentMeshesCache.indexOf(e),n=this._opaqueMeshesCache.indexOf(e);this.shouldRenderAsTransmission(e.material)?(e.material instanceof r.PBRMaterial&&(e.material.subSurface.refractionTexture=this._opaqueRenderTarget),-1!==n?(this._opaqueMeshesCache.splice(n,1),this._transparentMeshesCache.push(e)):-1===t&&this._transparentMeshesCache.push(e)):-1!==t?(this._transparentMeshesCache.splice(t,1),this._opaqueMeshesCache.push(e)):-1===n&&this._opaqueMeshesCache.push(e)}},e.prototype._setupRenderTargets=function(){var e=this,t=-1;if(this._scene.layers&&this._opaqueRenderTarget)for(var n=0,o=this._scene.layers;n<o.length;n++){var a=(l=o[n]).renderTargetTextures.indexOf(this._opaqueRenderTarget);a>=0&&l.renderTargetTextures.splice(a,1)}if(this._opaqueRenderTarget&&(t=this._scene.customRenderTargets.indexOf(this._opaqueRenderTarget),this._opaqueRenderTarget.dispose()),this._opaqueRenderTarget=new r.RenderTargetTexture("opaqueSceneTexture",this._options.renderSize,this._scene,!0),this._opaqueRenderTarget.renderList=this._opaqueMeshesCache,this._opaqueRenderTarget.gammaSpace=!0,this._opaqueRenderTarget.lodGenerationScale=1,this._opaqueRenderTarget.lodGenerationOffset=-4,t>=0?this._scene.customRenderTargets.splice(t,0,this._opaqueRenderTarget):(t=this._scene.customRenderTargets.length,this._scene.customRenderTargets.push(this._opaqueRenderTarget)),this._scene.layers&&this._opaqueRenderTarget)for(var s=0,i=this._scene.layers;s<i.length;s++){var l;(l=i[s]).renderTargetTextures.push(this._opaqueRenderTarget)}this._transparentMeshesCache.forEach((function(t){e.shouldRenderAsTransmission(t.material)&&t.material instanceof r.PBRMaterial&&(t.material.refractionTexture=e._opaqueRenderTarget)}))},e.prototype.dispose=function(){this._scene._transmissionHelper=void 0,this._opaqueRenderTarget&&(this._opaqueRenderTarget.dispose(),this._opaqueRenderTarget=null),this._transparentMeshesCache=[],this._opaqueMeshesCache=[]},e}(),g=function(){function e(e){this.name="KHR_materials_transmission",this.order=175,this._loader=e,this.enabled=this._loader.isExtensionUsed("KHR_materials_transmission"),this.enabled&&(e._parent.transparencyAsCoverage=!0)}return e.prototype.dispose=function(){this._loader=null},e.prototype.loadMaterialPropertiesAsync=function(e,t,n){var r=this;return o.b.LoadExtensionAsync(e,t,this.name,(function(o,a){var s=new Array;return s.push(r._loader.loadMaterialBasePropertiesAsync(e,t,n)),s.push(r._loader.loadMaterialPropertiesAsync(e,t,n)),s.push(r._loadTransparentPropertiesAsync(o,t,n,a)),Promise.all(s).then((function(){}))}))},e.prototype._loadTransparentPropertiesAsync=function(e,t,n,o){if(!(n instanceof r.PBRMaterial))throw new Error(e+": Material type not supported");var a=n;if(a.subSurface.isRefractionEnabled=!0,a.subSurface.volumeIndexOfRefraction=1,a.subSurface.useAlbedoToTintRefraction=!0,void 0===o.transmissionFactor)return a.subSurface.refractionIntensity=0,a.subSurface.isRefractionEnabled=!1,Promise.resolve();a.subSurface.refractionIntensity=o.transmissionFactor;var s=a.getScene();return a.subSurface.refractionIntensity&&!s._transmissionHelper&&new v({},a.getScene()),o.transmissionTexture?this._loader.loadTextureInfoAsync(e+"/transmissionTexture",o.transmissionTexture).then((function(e){a.subSurface.thicknessTexture=e,a.subSurface.useMaskFromThicknessTexture=!0})):Promise.resolve()},e}();o.b.RegisterExtension("KHR_materials_transmission",(function(e){return new g(e)}));var A=function(){function e(e){this.name="KHR_mesh_quantization",this.enabled=e.isExtensionUsed("KHR_mesh_quantization")}return e.prototype.dispose=function(){},e}();o.b.RegisterExtension("KHR_mesh_quantization",(function(e){return new A(e)}));var x=function(){function e(e){this.name="KHR_texture_basisu",this._loader=e,this.enabled=e.isExtensionUsed("KHR_texture_basisu")}return e.prototype.dispose=function(){this._loader=null},e.prototype._loadTextureAsync=function(e,t,n){var r=this;return o.b.LoadExtensionAsync(e,t,this.name,(function(a,s){var i=null==t.sampler?o.b.DefaultSampler:o.a.Get(e+"/sampler",r._loader.gltf.samplers,t.sampler),l=o.a.Get(a+"/source",r._loader.gltf.images,s.source);return r._loader._createTextureAsync(e,i,l,(function(e){n(e)}))}))},e}();o.b.RegisterExtension("KHR_texture_basisu",(function(e){return new x(e)}));var T=function(){function e(e){this.name="KHR_texture_transform",this._loader=e,this.enabled=this._loader.isExtensionUsed("KHR_texture_transform")}return e.prototype.dispose=function(){this._loader=null},e.prototype.loadTextureInfoAsync=function(e,t,n){var a=this;return o.b.LoadExtensionAsync(e,t,this.name,(function(o,s){return a._loader.loadTextureInfoAsync(e,t,(function(e){if(!(e instanceof r.Texture))throw new Error(o+": Texture type not supported");s.offset&&(e.uOffset=s.offset[0],e.vOffset=s.offset[1]),e.uRotationCenter=0,e.vRotationCenter=0,s.rotation&&(e.wAng=-s.rotation),s.scale&&(e.uScale=s.scale[0],e.vScale=s.scale[1]),null!=s.texCoord&&(e.coordinatesIndex=s.texCoord),n(e)}))}))},e}();o.b.RegisterExtension("KHR_texture_transform",(function(e){return new T(e)}));var L=function(){function e(e){this.name="KHR_xmp",this.order=100,this._loader=e,this.enabled=this._loader.isExtensionUsed("KHR_xmp")}return e.prototype.dispose=function(){this._loader=null},e.prototype.onLoading=function(){var e,t,n,r=null===(e=this._loader.gltf.extensions)||void 0===e?void 0:e.KHR_xmp,o=null===(n=null===(t=this._loader.gltf.asset)||void 0===t?void 0:t.extensions)||void 0===n?void 0:n.KHR_xmp;if(r&&o){var a=+o.packet;r.packets&&a<r.packets.length&&(this._loader.rootBabylonMesh.metadata=this._loader.rootBabylonMesh.metadata||{},this._loader.rootBabylonMesh.metadata.xmp=r.packets[a])}},e}();o.b.RegisterExtension("KHR_xmp",(function(e){return new L(e)}));var M=function(){function e(e){this.name="MSFT_audio_emitter",this._loader=e,this.enabled=this._loader.isExtensionUsed("MSFT_audio_emitter")}return e.prototype.dispose=function(){this._loader=null,this._clips=null,this._emitters=null},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 s=new Array;s.push(n._loader.loadSceneAsync(e,t));for(var i=0,l=a.emitters;i<l.length;i++){var u=l[i],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");s.push(n._loadEmitterAsync(r+"/emitters/"+c.index,c))}return Promise.all(s).then((function(){}))}))},e.prototype.loadNodeAsync=function(e,t,n){var a=this;return o.b.LoadExtensionAsync(e,t,this.name,(function(e,s){var i=new Array;return a._loader.loadNodeAsync(e,t,(function(t){for(var l=function(n){var s=o.a.Get(e+"/emitters",a._emitters,n);i.push(a._loadEmitterAsync(e+"/emitters/"+s.index,s).then((function(){for(var e=0,n=s._babylonSounds;e<n.length;e++){var o=n[e];o.attachToMesh(t),null==s.innerAngle&&null==s.outerAngle||(o.setLocalDirectionToMesh(r.Vector3.Forward()),o.setDirectionalCone(2*r.Tools.ToDegrees(null==s.innerAngle?Math.PI:s.innerAngle),2*r.Tools.ToDegrees(null==s.outerAngle?Math.PI:s.outerAngle),0))}})))},u=0,c=s.emitters;u<c.length;u++){l(c[u])}n(t)})).then((function(e){return Promise.all(i).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(s){var i=new Array;o.a.Assign(a.events);for(var l=0,u=a.events;l<u.length;l++){var c=u[l];i.push(n._loadAnimationEventAsync(r+"/events/"+c.index,e,t,c,s))}return Promise.all(i).then((function(){return s}))}))}))},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,s=t.name||"emitter"+t.index,i={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(s,o,n._loader.babylonScene,null,i);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 d=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:d}}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,s){var i=this;if(0==s.targetedAnimations.length)return Promise.resolve();var l=s.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,i._getEventAction(e,t,a.action,a.time,a.startOffset));l.animation.addEvent(n),s.onAnimationGroupEndObservable.add((function(){t.stop()})),s.onAnimationGroupPauseObservable.add((function(){t.pause()}))}}))},e}();o.b.RegisterExtension("MSFT_audio_emitter",(function(e){return new M(e)}));var E=function(){function e(e){this.name="MSFT_lod",this.order=100,this.maxLODsToLoad=10,this.onNodeLODsLoadedObservable=new r.Observable,this.onMaterialLODsLoadedObservable=new r.Observable,this._bufferLODs=new Array,this._nodeIndexLOD=null,this._nodeSignalLODs=new Array,this._nodePromiseLODs=new Array,this._nodeBufferLODs=new Array,this._materialIndexLOD=null,this._materialSignalLODs=new Array,this._materialPromiseLODs=new Array,this._materialBufferLODs=new Array,this._loader=e,this.enabled=this._loader.isExtensionUsed("MSFT_lod")}return e.prototype.dispose=function(){this._loader=null,this._nodeIndexLOD=null,this._nodeSignalLODs.length=0,this._nodePromiseLODs.length=0,this._nodeBufferLODs.length=0,this._materialIndexLOD=null,this._materialSignalLODs.length=0,this._materialPromiseLODs.length=0,this._materialBufferLODs.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._loadBufferLOD(e._nodeBufferLODs,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._loadBufferLOD(e._materialBufferLODs,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.loadSceneAsync=function(e,t){var n=this._loader.loadSceneAsync(e,t);return this._loadBufferLOD(this._bufferLODs,0),n},e.prototype.loadNodeAsync=function(e,t,n){var a=this;return o.b.LoadExtensionAsync(e,t,this.name,(function(e,n){var o,s=a._getLODs(e,t,a._loader.gltf.nodes,n.ids);a._loader.logOpen(""+e);for(var i=function(e){var t=s[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=s[e-1];n._babylonTransformNode&&(a._disposeTransformNode(n._babylonTransformNode),delete n._babylonTransformNode)}return t.setEnabled(!0),t}));a._nodePromiseLODs[e]=a._nodePromiseLODs[e]||[],0===e?o=n:(a._nodeIndexLOD=null,a._nodePromiseLODs[e].push(n))},l=0;l<s.length;l++)i(l);return a._loader.logClose(),o}))},e.prototype._loadMaterialAsync=function(e,t,n,r,a){var s=this;return this._nodeIndexLOD?null:o.b.LoadExtensionAsync(e,t,this.name,(function(e,o){var i,l=s._getLODs(e,t,s._loader.gltf.materials,o.ids);s._loader.logOpen(""+e);for(var u=function(e){var t=l[e];0!==e&&(s._materialIndexLOD=e);var o=s._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]&&(s._disposeMaterials([n[r].babylonMaterial]),delete n[r])}return t}));s._materialPromiseLODs[e]=s._materialPromiseLODs[e]||[],0===e?i=o:(s._materialIndexLOD=null,s._materialPromiseLODs[e].push(o))},c=0;c<l.length;c++)u(c);return s._loader.logClose(),i}))},e.prototype._loadUriAsync=function(e,t,n){var o=this;if(null!==this._nodeIndexLOD){this._loader.log("deferred");var 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)}))}if(null!==this._materialIndexLOD){this._loader.log("deferred");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)}))}return null},e.prototype.loadBufferAsync=function(e,t,n,o){if(this._loader.parent.useRangeRequests&&!t.uri){if(!this._loader.bin)throw new Error(e+": Uri is missing or the binary glTF is missing its binary chunk");var a=function(e,t){var a=n,s=a+o-1,i=e[t];return i?(i.start=Math.min(i.start,a),i.end=Math.max(i.end,s)):(i={start:a,end:s,loaded:new r.Deferred},e[t]=i),i.loaded.promise.then((function(e){return new Uint8Array(e.buffer,e.byteOffset+n-i.start,o)}))};return this._loader.log("deferred"),null!==this._nodeIndexLOD?a(this._nodeBufferLODs,this._nodeIndexLOD):null!==this._materialIndexLOD?a(this._materialBufferLODs,this._materialIndexLOD):a(this._bufferLODs,0)}return null},e.prototype._loadBufferLOD=function(e,t){var n=e[t];n&&(this._loader.log("Loading buffer range ["+n.start+"-"+n.end+"]"),this._loader.bin.readAsync(n.start,n.end-n.start+1).then((function(e){n.loaded.resolve(e)}),(function(e){n.loaded.reject(e)})))},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,s=r.length-1;s>=0;s--)if(a.push(o.a.Get(e+"/ids/"+r[s],n,r[s])),a.length===this.maxLODsToLoad)return a;return a.push(t),a},e.prototype._disposeTransformNode=function(e){var t=this,n=new Array,r=e.material;r&&n.push(r);for(var o=0,a=e.getChildMeshes();o<a.length;o++){var s=a[o];s.material&&n.push(s.material)}e.dispose();var i=n.filter((function(e){return t._loader.babylonScene.meshes.every((function(t){return t.material!=e}))}));this._disposeMaterials(i)},e.prototype._disposeMaterials=function(e){for(var t={},n=0,r=e;n<r.length;n++){for(var o=0,a=(c=r[n]).getActiveTextures();o<a.length;o++){var s=a[o];t[s.uniqueId]=s}c.dispose()}for(var i in t)for(var l=0,u=this._loader.babylonScene.materials;l<u.length;l++){var c;(c=u[l]).hasTexture(t[i])&&delete t[i]}for(var i in t)t[i].dispose()},e}();o.b.RegisterExtension("MSFT_lod",(function(e){return new E(e)}));var O=function(){function e(e){this.name="MSFT_minecraftMesh",this._loader=e,this.enabled=this._loader.isExtensionUsed("MSFT_minecraftMesh")}return e.prototype.dispose=function(){this._loader=null},e.prototype.loadMaterialPropertiesAsync=function(e,t,n){var a=this;return o.b.LoadExtraAsync(e,t,this.name,(function(o,s){if(s){if(!(n instanceof r.PBRMaterial))throw new Error(o+": Material type not supported");var i=a._loader.loadMaterialPropertiesAsync(e,t,n);return n.needAlphaBlending()&&(n.forceDepthWrite=!0,n.separateCullingPass=!0),n.backFaceCulling=n.forceDepthWrite,n.twoSidedLighting=!0,i}return null}))},e}();o.b.RegisterExtension("MSFT_minecraftMesh",(function(e){return new O(e)}));var w=function(){function e(e){this.name="MSFT_sRGBFactors",this._loader=e,this.enabled=this._loader.isExtensionUsed("MSFT_sRGBFactors")}return e.prototype.dispose=function(){this._loader=null},e.prototype.loadMaterialPropertiesAsync=function(e,t,n){var a=this;return o.b.LoadExtraAsync(e,t,this.name,(function(o,s){if(s){if(!(n instanceof r.PBRMaterial))throw new Error(o+": Material type not supported");var i=a._loader.loadMaterialPropertiesAsync(e,t,n);return n.albedoTexture||n.albedoColor.toLinearSpaceToRef(n.albedoColor),n.reflectivityTexture||n.reflectivityColor.toLinearSpaceToRef(n.reflectivityColor),i}return null}))},e}();o.b.RegisterExtension("MSFT_sRGBFactors",(function(e){return new w(e)}));var R=function(){function e(e){this.name="ExtrasAsMetadata",this.enabled=!0,this._loader=e}return e.prototype._assignExtras=function(e,t){if(t.extras&&Object.keys(t.extras).length>0){var n=e.metadata=e.metadata||{};(n.gltf=n.gltf||{}).extras=t.extras}},e.prototype.dispose=function(){this._loader=null},e.prototype.loadNodeAsync=function(e,t,n){var r=this;return this._loader.loadNodeAsync(e,t,(function(e){r._assignExtras(e,t),n(e)}))},e.prototype.loadCameraAsync=function(e,t,n){var r=this;return this._loader.loadCameraAsync(e,t,(function(e){r._assignExtras(e,t),n(e)}))},e.prototype.createMaterial=function(e,t,n){var r=this._loader.createMaterial(e,t,n);return 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