text: import { Sphere } from '../math/Sphere.js';
  import { Vector3 } from '../math/Vector3.js';
  import { BufferAttribute } from '../core/BufferAttribute.js';
  import { BufferGeometry } from '../core/BufferGeometry.js';
  import { FileLoader } from './FileLoader.js';
  import { DefaultLoadingManager } from './LoadingManager.js';
  import { InstancedBufferGeometry } from '../core/InstancedBufferGeometry.js';
  import { InstancedBufferAttribute } from '../core/InstancedBufferAttribute.js';
  
  /**
   * @author mrdoob / http://mrdoob.com/
   */
  
  function BufferGeometryLoader( manager ) {
  
  	this.manager = ( manager !== undefined ) ? manager : DefaultLoadingManager;
  
  }
  
  Object.assign( BufferGeometryLoader.prototype, {
  
  	load: function ( url, onLoad, onProgress, onError ) {
  
  		var scope = this;
  
  		var loader = new FileLoader( scope.manager );
  		loader.setPath( scope.path );
  		loader.load( url, function ( text ) {
  
  			onLoad( scope.parse( JSON.parse( text ) ) );
  
  		}, onProgress, onError );
  
  	},
  
  	parse: function ( json ) {
  
  		var geometry = json.isInstancedBufferGeometry ? new InstancedBufferGeometry() : new BufferGeometry();
  
  		var index = json.data.index;
  
  		if ( index !== undefined ) {
  
  			var typedArray = new TYPED_ARRAYS[ index.type ]( index.array );
  			geometry.setIndex( new BufferAttribute( typedArray, 1 ) );
  
  		}
  
  		var attributes = json.data.attributes;
  
  		for ( var key in attributes ) {
  
  			var attribute = attributes[ key ];
  			var typedArray = new TYPED_ARRAYS[ attribute.type ]( attribute.array );
  			var bufferAttributeConstr = attribute.isInstancedBufferAttribute ? InstancedBufferAttribute : BufferAttribute;
  			var bufferAttribute = new bufferAttributeConstr( typedArray, attribute.itemSize, attribute.normalized );
  			if ( attribute.name !== undefined ) bufferAttribute.name = attribute.name;
  			geometry.addAttribute( key, bufferAttribute );
  
  		}
  
  		var morphAttributes = json.data.morphAttributes;
  
  		if ( morphAttributes ) {
  
  			for ( var key in morphAttributes ) {
  
  				var attributeArray = morphAttributes[ key ];
  
  				var array = [];
  
  				for ( var i = 0, il = attributeArray.length; i < il; i ++ ) {
  
  					var attribute = attributeArray[ i ];
  					var typedArray = new TYPED_ARRAYS[ attribute.type ]( attribute.array );
  
  					var bufferAttribute = new BufferAttribute( typedArray, attribute.itemSize, attribute.normalized );
  					if ( attribute.name !== undefined ) bufferAttribute.name = attribute.name;
  					array.push( bufferAttribute );
  
  				}
  
  				geometry.morphAttributes[ key ] = array;
  
  			}
  
  		}
  
  		var groups = json.data.groups || json.data.drawcalls || json.data.offsets;
  
  		if ( groups !== undefined ) {
  
  			for ( var i = 0, n = groups.length; i !== n; ++ i ) {
  
  				var group = groups[ i ];
  
  				geometry.addGroup( group.start, group.count, group.materialIndex );
  
  			}
  
  		}
  
  		var boundingSphere = json.data.boundingSphere;
  
  		if ( boundingSphere !== undefined ) {
  
  			var center = new Vector3();
  
  			if ( boundingSphere.center !== undefined ) {
  
  				center.fromArray( boundingSphere.center );
  
  			}
  
  			geometry.boundingSphere = new Sphere( center, boundingSphere.radius );
  
  		}
  
  		if ( json.name ) geometry.name = json.name;
  		if ( json.userData ) geometry.userData = json.userData;
  
  		return geometry;
  
  	},
  
  	setPath: function ( value ) {
  
  		this.path = value;
  		return this;
  
  	}
  
  } );
  
  var TYPED_ARRAYS = {
  	Int8Array: Int8Array,
  	Uint8Array: Uint8Array,
  	// Workaround for IE11 pre KB2929437. See #11440
  	Uint8ClampedArray: typeof Uint8ClampedArray !== 'undefined' ? Uint8ClampedArray : Uint8Array,
  	Int16Array: Int16Array,
  	Uint16Array: Uint16Array,
  	Int32Array: Int32Array,
  	Uint32Array: Uint32Array,
  	Float32Array: Float32Array,
  	Float64Array: Float64Array
  };
  
  export { BufferGeometryLoader };
  