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site/game/node_modules/three/src/loaders/BufferGeometryLoader.js

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+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 { Loader } from './Loader.js';
+import { InstancedBufferGeometry } from '../core/InstancedBufferGeometry.js';
+import { InstancedBufferAttribute } from '../core/InstancedBufferAttribute.js';
+import { InterleavedBufferAttribute } from '../core/InterleavedBufferAttribute.js';
+import { InterleavedBuffer } from '../core/InterleavedBuffer.js';
+import { getTypedArray } from '../utils.js';
+
+class BufferGeometryLoader extends Loader {
+
+	constructor( manager ) {
+
+		super( manager );
+
+	}
+
+	load( url, onLoad, onProgress, onError ) {
+
+		const scope = this;
+
+		const loader = new FileLoader( scope.manager );
+		loader.setPath( scope.path );
+		loader.setRequestHeader( scope.requestHeader );
+		loader.setWithCredentials( scope.withCredentials );
+		loader.load( url, function ( text ) {
+
+			try {
+
+				onLoad( scope.parse( JSON.parse( text ) ) );
+
+			} catch ( e ) {
+
+				if ( onError ) {
+
+					onError( e );
+
+				} else {
+
+					console.error( e );
+
+				}
+
+				scope.manager.itemError( url );
+
+			}
+
+		}, onProgress, onError );
+
+	}
+
+	parse( json ) {
+
+		const interleavedBufferMap = {};
+		const arrayBufferMap = {};
+
+		function getInterleavedBuffer( json, uuid ) {
+
+			if ( interleavedBufferMap[ uuid ] !== undefined ) return interleavedBufferMap[ uuid ];
+
+			const interleavedBuffers = json.interleavedBuffers;
+			const interleavedBuffer = interleavedBuffers[ uuid ];
+
+			const buffer = getArrayBuffer( json, interleavedBuffer.buffer );
+
+			const array = getTypedArray( interleavedBuffer.type, buffer );
+			const ib = new InterleavedBuffer( array, interleavedBuffer.stride );
+			ib.uuid = interleavedBuffer.uuid;
+
+			interleavedBufferMap[ uuid ] = ib;
+
+			return ib;
+
+		}
+
+		function getArrayBuffer( json, uuid ) {
+
+			if ( arrayBufferMap[ uuid ] !== undefined ) return arrayBufferMap[ uuid ];
+
+			const arrayBuffers = json.arrayBuffers;
+			const arrayBuffer = arrayBuffers[ uuid ];
+
+			const ab = new Uint32Array( arrayBuffer ).buffer;
+
+			arrayBufferMap[ uuid ] = ab;
+
+			return ab;
+
+		}
+
+		const geometry = json.isInstancedBufferGeometry ? new InstancedBufferGeometry() : new BufferGeometry();
+
+		const index = json.data.index;
+
+		if ( index !== undefined ) {
+
+			const typedArray = getTypedArray( index.type, index.array );
+			geometry.setIndex( new BufferAttribute( typedArray, 1 ) );
+
+		}
+
+		const attributes = json.data.attributes;
+
+		for ( const key in attributes ) {
+
+			const attribute = attributes[ key ];
+			let bufferAttribute;
+
+			if ( attribute.isInterleavedBufferAttribute ) {
+
+				const interleavedBuffer = getInterleavedBuffer( json.data, attribute.data );
+				bufferAttribute = new InterleavedBufferAttribute( interleavedBuffer, attribute.itemSize, attribute.offset, attribute.normalized );
+
+			} else {
+
+				const typedArray = getTypedArray( attribute.type, attribute.array );
+				const bufferAttributeConstr = attribute.isInstancedBufferAttribute ? InstancedBufferAttribute : BufferAttribute;
+				bufferAttribute = new bufferAttributeConstr( typedArray, attribute.itemSize, attribute.normalized );
+
+			}
+
+			if ( attribute.name !== undefined ) bufferAttribute.name = attribute.name;
+			if ( attribute.usage !== undefined ) bufferAttribute.setUsage( attribute.usage );
+
+			geometry.setAttribute( key, bufferAttribute );
+
+		}
+
+		const morphAttributes = json.data.morphAttributes;
+
+		if ( morphAttributes ) {
+
+			for ( const key in morphAttributes ) {
+
+				const attributeArray = morphAttributes[ key ];
+
+				const array = [];
+
+				for ( let i = 0, il = attributeArray.length; i < il; i ++ ) {
+
+					const attribute = attributeArray[ i ];
+					let bufferAttribute;
+
+					if ( attribute.isInterleavedBufferAttribute ) {
+
+						const interleavedBuffer = getInterleavedBuffer( json.data, attribute.data );
+						bufferAttribute = new InterleavedBufferAttribute( interleavedBuffer, attribute.itemSize, attribute.offset, attribute.normalized );
+
+					} else {
+
+						const typedArray = getTypedArray( attribute.type, attribute.array );
+						bufferAttribute = new BufferAttribute( typedArray, attribute.itemSize, attribute.normalized );
+
+					}
+
+					if ( attribute.name !== undefined ) bufferAttribute.name = attribute.name;
+					array.push( bufferAttribute );
+
+				}
+
+				geometry.morphAttributes[ key ] = array;
+
+			}
+
+		}
+
+		const morphTargetsRelative = json.data.morphTargetsRelative;
+
+		if ( morphTargetsRelative ) {
+
+			geometry.morphTargetsRelative = true;
+
+		}
+
+		const groups = json.data.groups || json.data.drawcalls || json.data.offsets;
+
+		if ( groups !== undefined ) {
+
+			for ( let i = 0, n = groups.length; i !== n; ++ i ) {
+
+				const group = groups[ i ];
+
+				geometry.addGroup( group.start, group.count, group.materialIndex );
+
+			}
+
+		}
+
+		const boundingSphere = json.data.boundingSphere;
+
+		if ( boundingSphere !== undefined ) {
+
+			const 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;
+
+	}
+
+}
+
+export { BufferGeometryLoader };