823 lines
17 KiB
JavaScript
823 lines
17 KiB
JavaScript
import {
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BufferAttribute,
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BufferGeometry,
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ClampToEdgeWrapping,
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FileLoader,
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Group,
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NoColorSpace,
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Loader,
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Mesh,
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MeshPhysicalMaterial,
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MirroredRepeatWrapping,
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RepeatWrapping,
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SRGBColorSpace,
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TextureLoader,
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Object3D,
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Vector2
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} from 'three';
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import * as fflate from '../libs/fflate.module.js';
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class USDAParser {
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parse( text ) {
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const data = {};
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const lines = text.split( '\n' );
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let string = null;
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let target = data;
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const stack = [ data ];
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// debugger;
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for ( const line of lines ) {
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// console.log( line );
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if ( line.includes( '=' ) ) {
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const assignment = line.split( '=' );
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const lhs = assignment[ 0 ].trim();
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const rhs = assignment[ 1 ].trim();
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if ( rhs.endsWith( '{' ) ) {
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const group = {};
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stack.push( group );
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target[ lhs ] = group;
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target = group;
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} else {
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target[ lhs ] = rhs;
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}
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} else if ( line.endsWith( '{' ) ) {
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const group = target[ string ] || {};
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stack.push( group );
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target[ string ] = group;
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target = group;
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} else if ( line.endsWith( '}' ) ) {
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stack.pop();
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if ( stack.length === 0 ) continue;
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target = stack[ stack.length - 1 ];
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} else if ( line.endsWith( '(' ) ) {
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const meta = {};
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stack.push( meta );
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string = line.split( '(' )[ 0 ].trim() || string;
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target[ string ] = meta;
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target = meta;
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} else if ( line.endsWith( ')' ) ) {
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stack.pop();
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target = stack[ stack.length - 1 ];
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} else {
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string = line.trim();
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}
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}
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return data;
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}
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}
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class USDZLoader extends Loader {
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constructor( manager ) {
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super( manager );
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}
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load( url, onLoad, onProgress, onError ) {
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const scope = this;
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const loader = new FileLoader( scope.manager );
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loader.setPath( scope.path );
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loader.setResponseType( 'arraybuffer' );
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loader.setRequestHeader( scope.requestHeader );
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loader.setWithCredentials( scope.withCredentials );
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loader.load( url, function ( text ) {
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try {
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onLoad( scope.parse( text ) );
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} catch ( e ) {
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if ( onError ) {
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onError( e );
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} else {
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console.error( e );
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}
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scope.manager.itemError( url );
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}
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}, onProgress, onError );
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}
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parse( buffer ) {
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const parser = new USDAParser();
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function parseAssets( zip ) {
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const data = {};
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const loader = new FileLoader();
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loader.setResponseType( 'arraybuffer' );
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for ( const filename in zip ) {
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if ( filename.endsWith( 'png' ) ) {
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const blob = new Blob( [ zip[ filename ] ], { type: { type: 'image/png' } } );
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data[ filename ] = URL.createObjectURL( blob );
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}
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if ( filename.endsWith( 'usd' ) || filename.endsWith( 'usda' ) ) {
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if ( isCrateFile( zip[ filename ] ) ) {
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console.warn( 'THREE.USDZLoader: Crate files (.usdc or binary .usd) are not supported.' );
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continue;
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}
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const text = fflate.strFromU8( zip[ filename ] );
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data[ filename ] = parser.parse( text );
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}
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}
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return data;
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}
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function isCrateFile( buffer ) {
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// Check if this a crate file. First 7 bytes of a crate file are "PXR-USDC".
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const fileHeader = buffer.slice( 0, 7 );
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const crateHeader = new Uint8Array( [ 0x50, 0x58, 0x52, 0x2D, 0x55, 0x53, 0x44, 0x43 ] );
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// If this is not a crate file, we assume it is a plain USDA file.
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return fileHeader.every( ( value, index ) => value === crateHeader[ index ] );
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}
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function findUSD( zip ) {
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if ( zip.length < 1 ) return undefined;
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const firstFileName = Object.keys( zip )[ 0 ];
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let isCrate = false;
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// As per the USD specification, the first entry in the zip archive is used as the main file ("UsdStage").
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// ASCII files can end in either .usda or .usd.
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// See https://openusd.org/release/spec_usdz.html#layout
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if ( firstFileName.endsWith( 'usda' ) ) return zip[ firstFileName ];
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if ( firstFileName.endsWith( 'usdc' ) ) {
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isCrate = true;
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} else if ( firstFileName.endsWith( 'usd' ) ) {
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// If this is not a crate file, we assume it is a plain USDA file.
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if ( ! isCrateFile( zip[ firstFileName ] ) ) {
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return zip[ firstFileName ];
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} else {
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isCrate = true;
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}
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}
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if ( isCrate ) {
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console.warn( 'THREE.USDZLoader: Crate files (.usdc or binary .usd) are not supported.' );
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}
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return undefined;
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}
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const zip = fflate.unzipSync( new Uint8Array( buffer ) );
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// console.log( zip );
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const assets = parseAssets( zip );
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// console.log( assets )
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const file = findUSD( zip );
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if ( file === undefined ) {
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console.warn( 'THREE.USDZLoader: No usda file found.' );
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return new Group();
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}
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// Parse file
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const text = fflate.strFromU8( file );
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const root = parser.parse( text );
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// Build scene
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function findMeshGeometry( data ) {
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if ( ! data ) return undefined;
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if ( 'prepend references' in data ) {
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const reference = data[ 'prepend references' ];
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const parts = reference.split( '@' );
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const path = parts[ 1 ].replace( /^.\//, '' );
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const id = parts[ 2 ].replace( /^<\//, '' ).replace( />$/, '' );
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return findGeometry( assets[ path ], id );
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}
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return findGeometry( data );
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}
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function findGeometry( data, id ) {
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if ( ! data ) return undefined;
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if ( id !== undefined ) {
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const def = `def Mesh "${id}"`;
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if ( def in data ) {
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return data[ def ];
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}
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}
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for ( const name in data ) {
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const object = data[ name ];
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if ( name.startsWith( 'def Mesh' ) ) {
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// Move points to Mesh
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if ( 'point3f[] points' in data ) {
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object[ 'point3f[] points' ] = data[ 'point3f[] points' ];
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}
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// Move st to Mesh
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if ( 'texCoord2f[] primvars:st' in data ) {
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object[ 'texCoord2f[] primvars:st' ] = data[ 'texCoord2f[] primvars:st' ];
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}
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// Move st indices to Mesh
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if ( 'int[] primvars:st:indices' in data ) {
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object[ 'int[] primvars:st:indices' ] = data[ 'int[] primvars:st:indices' ];
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}
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return object;
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}
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if ( typeof object === 'object' ) {
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const geometry = findGeometry( object );
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if ( geometry ) return geometry;
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}
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}
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}
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function buildGeometry( data ) {
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if ( ! data ) return undefined;
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let geometry = new BufferGeometry();
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if ( 'int[] faceVertexIndices' in data ) {
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const indices = JSON.parse( data[ 'int[] faceVertexIndices' ] );
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geometry.setIndex( indices );
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}
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if ( 'point3f[] points' in data ) {
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const positions = JSON.parse( data[ 'point3f[] points' ].replace( /[()]*/g, '' ) );
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const attribute = new BufferAttribute( new Float32Array( positions ), 3 );
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geometry.setAttribute( 'position', attribute );
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}
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if ( 'normal3f[] normals' in data ) {
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const normals = JSON.parse( data[ 'normal3f[] normals' ].replace( /[()]*/g, '' ) );
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const attribute = new BufferAttribute( new Float32Array( normals ), 3 );
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geometry.setAttribute( 'normal', attribute );
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} else {
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geometry.computeVertexNormals();
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}
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if ( 'float2[] primvars:st' in data ) {
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data[ 'texCoord2f[] primvars:st' ] = data[ 'float2[] primvars:st' ];
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}
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if ( 'texCoord2f[] primvars:st' in data ) {
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const uvs = JSON.parse( data[ 'texCoord2f[] primvars:st' ].replace( /[()]*/g, '' ) );
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const attribute = new BufferAttribute( new Float32Array( uvs ), 2 );
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if ( 'int[] primvars:st:indices' in data ) {
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geometry = geometry.toNonIndexed();
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const indices = JSON.parse( data[ 'int[] primvars:st:indices' ] );
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geometry.setAttribute( 'uv', toFlatBufferAttribute( attribute, indices ) );
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} else {
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geometry.setAttribute( 'uv', attribute );
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}
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}
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return geometry;
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}
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function toFlatBufferAttribute( attribute, indices ) {
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const array = attribute.array;
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const itemSize = attribute.itemSize;
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const array2 = new array.constructor( indices.length * itemSize );
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let index = 0, index2 = 0;
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for ( let i = 0, l = indices.length; i < l; i ++ ) {
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index = indices[ i ] * itemSize;
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for ( let j = 0; j < itemSize; j ++ ) {
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array2[ index2 ++ ] = array[ index ++ ];
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}
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}
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return new BufferAttribute( array2, itemSize );
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}
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function findMeshMaterial( data ) {
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if ( ! data ) return undefined;
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if ( 'rel material:binding' in data ) {
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const reference = data[ 'rel material:binding' ];
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const id = reference.replace( /^<\//, '' ).replace( />$/, '' );
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const parts = id.split( '/' );
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return findMaterial( root, ` "${ parts[ 1 ] }"` );
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}
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return findMaterial( data );
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}
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function findMaterial( data, id = '' ) {
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for ( const name in data ) {
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const object = data[ name ];
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if ( name.startsWith( 'def Material' + id ) ) {
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return object;
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}
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if ( typeof object === 'object' ) {
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const material = findMaterial( object, id );
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if ( material ) return material;
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}
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}
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}
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function setTextureParams( map, data_value ) {
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// rotation, scale and translation
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if ( data_value[ 'float inputs:rotation' ] ) {
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map.rotation = parseFloat( data_value[ 'float inputs:rotation' ] );
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}
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if ( data_value[ 'float2 inputs:scale' ] ) {
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map.repeat = new Vector2().fromArray( JSON.parse( '[' + data_value[ 'float2 inputs:scale' ].replace( /[()]*/g, '' ) + ']' ) );
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}
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if ( data_value[ 'float2 inputs:translation' ] ) {
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map.offset = new Vector2().fromArray( JSON.parse( '[' + data_value[ 'float2 inputs:translation' ].replace( /[()]*/g, '' ) + ']' ) );
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}
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}
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function buildMaterial( data ) {
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const material = new MeshPhysicalMaterial();
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if ( data !== undefined ) {
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if ( 'def Shader "PreviewSurface"' in data ) {
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const surface = data[ 'def Shader "PreviewSurface"' ];
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if ( 'color3f inputs:diffuseColor.connect' in surface ) {
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const path = surface[ 'color3f inputs:diffuseColor.connect' ];
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const sampler = findTexture( root, /(\w+).output/.exec( path )[ 1 ] );
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material.map = buildTexture( sampler );
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material.map.colorSpace = SRGBColorSpace;
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if ( 'def Shader "Transform2d_diffuse"' in data ) {
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setTextureParams( material.map, data[ 'def Shader "Transform2d_diffuse"' ] );
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}
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} else if ( 'color3f inputs:diffuseColor' in surface ) {
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const color = surface[ 'color3f inputs:diffuseColor' ].replace( /[()]*/g, '' );
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material.color.fromArray( JSON.parse( '[' + color + ']' ) );
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}
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if ( 'color3f inputs:emissiveColor.connect' in surface ) {
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const path = surface[ 'color3f inputs:emissiveColor.connect' ];
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const sampler = findTexture( root, /(\w+).output/.exec( path )[ 1 ] );
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material.emissiveMap = buildTexture( sampler );
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material.emissiveMap.colorSpace = SRGBColorSpace;
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material.emissive.set( 0xffffff );
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if ( 'def Shader "Transform2d_emissive"' in data ) {
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setTextureParams( material.emissiveMap, data[ 'def Shader "Transform2d_emissive"' ] );
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}
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} else if ( 'color3f inputs:emissiveColor' in surface ) {
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const color = surface[ 'color3f inputs:emissiveColor' ].replace( /[()]*/g, '' );
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material.emissive.fromArray( JSON.parse( '[' + color + ']' ) );
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}
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if ( 'normal3f inputs:normal.connect' in surface ) {
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const path = surface[ 'normal3f inputs:normal.connect' ];
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const sampler = findTexture( root, /(\w+).output/.exec( path )[ 1 ] );
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material.normalMap = buildTexture( sampler );
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material.normalMap.colorSpace = NoColorSpace;
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if ( 'def Shader "Transform2d_normal"' in data ) {
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setTextureParams( material.normalMap, data[ 'def Shader "Transform2d_normal"' ] );
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}
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}
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if ( 'float inputs:roughness.connect' in surface ) {
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const path = surface[ 'float inputs:roughness.connect' ];
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const sampler = findTexture( root, /(\w+).output/.exec( path )[ 1 ] );
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material.roughness = 1.0;
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material.roughnessMap = buildTexture( sampler );
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material.roughnessMap.colorSpace = NoColorSpace;
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if ( 'def Shader "Transform2d_roughness"' in data ) {
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setTextureParams( material.roughnessMap, data[ 'def Shader "Transform2d_roughness"' ] );
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}
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} else if ( 'float inputs:roughness' in surface ) {
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material.roughness = parseFloat( surface[ 'float inputs:roughness' ] );
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}
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if ( 'float inputs:metallic.connect' in surface ) {
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const path = surface[ 'float inputs:metallic.connect' ];
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const sampler = findTexture( root, /(\w+).output/.exec( path )[ 1 ] );
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material.metalness = 1.0;
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material.metalnessMap = buildTexture( sampler );
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material.metalnessMap.colorSpace = NoColorSpace;
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if ( 'def Shader "Transform2d_metallic"' in data ) {
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setTextureParams( material.metalnessMap, data[ 'def Shader "Transform2d_metallic"' ] );
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}
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} else if ( 'float inputs:metallic' in surface ) {
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material.metalness = parseFloat( surface[ 'float inputs:metallic' ] );
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}
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if ( 'float inputs:clearcoat.connect' in surface ) {
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const path = surface[ 'float inputs:clearcoat.connect' ];
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const sampler = findTexture( root, /(\w+).output/.exec( path )[ 1 ] );
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material.clearcoat = 1.0;
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material.clearcoatMap = buildTexture( sampler );
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material.clearcoatMap.colorSpace = NoColorSpace;
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if ( 'def Shader "Transform2d_clearcoat"' in data ) {
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setTextureParams( material.clearcoatMap, data[ 'def Shader "Transform2d_clearcoat"' ] );
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}
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} else if ( 'float inputs:clearcoat' in surface ) {
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material.clearcoat = parseFloat( surface[ 'float inputs:clearcoat' ] );
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}
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if ( 'float inputs:clearcoatRoughness.connect' in surface ) {
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const path = surface[ 'float inputs:clearcoatRoughness.connect' ];
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const sampler = findTexture( root, /(\w+).output/.exec( path )[ 1 ] );
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material.clearcoatRoughness = 1.0;
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material.clearcoatRoughnessMap = buildTexture( sampler );
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material.clearcoatRoughnessMap.colorSpace = NoColorSpace;
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if ( 'def Shader "Transform2d_clearcoatRoughness"' in data ) {
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setTextureParams( material.clearcoatRoughnessMap, data[ 'def Shader "Transform2d_clearcoatRoughness"' ] );
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}
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} else if ( 'float inputs:clearcoatRoughness' in surface ) {
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material.clearcoatRoughness = parseFloat( surface[ 'float inputs:clearcoatRoughness' ] );
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}
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if ( 'float inputs:ior' in surface ) {
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material.ior = parseFloat( surface[ 'float inputs:ior' ] );
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}
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if ( 'float inputs:occlusion.connect' in surface ) {
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const path = surface[ 'float inputs:occlusion.connect' ];
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const sampler = findTexture( root, /(\w+).output/.exec( path )[ 1 ] );
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material.aoMap = buildTexture( sampler );
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material.aoMap.colorSpace = NoColorSpace;
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if ( 'def Shader "Transform2d_occlusion"' in data ) {
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setTextureParams( material.aoMap, data[ 'def Shader "Transform2d_occlusion"' ] );
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}
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}
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|
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}
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|
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if ( 'def Shader "diffuseColor_texture"' in data ) {
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|
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const sampler = data[ 'def Shader "diffuseColor_texture"' ];
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|
|
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material.map = buildTexture( sampler );
|
|
material.map.colorSpace = SRGBColorSpace;
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|
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}
|
|
|
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if ( 'def Shader "normal_texture"' in data ) {
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|
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const sampler = data[ 'def Shader "normal_texture"' ];
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|
|
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material.normalMap = buildTexture( sampler );
|
|
material.normalMap.colorSpace = NoColorSpace;
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|
|
|
}
|
|
|
|
}
|
|
|
|
return material;
|
|
|
|
}
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|
|
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function findTexture( data, id ) {
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|
|
|
for ( const name in data ) {
|
|
|
|
const object = data[ name ];
|
|
|
|
if ( name.startsWith( `def Shader "${ id }"` ) ) {
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|
|
|
return object;
|
|
|
|
}
|
|
|
|
if ( typeof object === 'object' ) {
|
|
|
|
const texture = findTexture( object, id );
|
|
|
|
if ( texture ) return texture;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
function buildTexture( data ) {
|
|
|
|
if ( 'asset inputs:file' in data ) {
|
|
|
|
const path = data[ 'asset inputs:file' ].replace( /@*/g, '' );
|
|
|
|
const loader = new TextureLoader();
|
|
|
|
const texture = loader.load( assets[ path ] );
|
|
|
|
const map = {
|
|
'"clamp"': ClampToEdgeWrapping,
|
|
'"mirror"': MirroredRepeatWrapping,
|
|
'"repeat"': RepeatWrapping
|
|
};
|
|
|
|
if ( 'token inputs:wrapS' in data ) {
|
|
|
|
texture.wrapS = map[ data[ 'token inputs:wrapS' ] ];
|
|
|
|
}
|
|
|
|
if ( 'token inputs:wrapT' in data ) {
|
|
|
|
texture.wrapT = map[ data[ 'token inputs:wrapT' ] ];
|
|
|
|
}
|
|
|
|
return texture;
|
|
|
|
}
|
|
|
|
return null;
|
|
|
|
}
|
|
|
|
function buildObject( data ) {
|
|
|
|
const geometry = buildGeometry( findMeshGeometry( data ) );
|
|
const material = buildMaterial( findMeshMaterial( data ) );
|
|
|
|
const mesh = geometry ? new Mesh( geometry, material ) : new Object3D();
|
|
|
|
if ( 'matrix4d xformOp:transform' in data ) {
|
|
|
|
const array = JSON.parse( '[' + data[ 'matrix4d xformOp:transform' ].replace( /[()]*/g, '' ) + ']' );
|
|
|
|
mesh.matrix.fromArray( array );
|
|
mesh.matrix.decompose( mesh.position, mesh.quaternion, mesh.scale );
|
|
|
|
}
|
|
|
|
return mesh;
|
|
|
|
}
|
|
|
|
function buildHierarchy( data, group ) {
|
|
|
|
for ( const name in data ) {
|
|
|
|
if ( name.startsWith( 'def Scope' ) ) {
|
|
|
|
buildHierarchy( data[ name ], group );
|
|
|
|
} else if ( name.startsWith( 'def Xform' ) ) {
|
|
|
|
const mesh = buildObject( data[ name ] );
|
|
|
|
if ( /def Xform "(\w+)"/.test( name ) ) {
|
|
|
|
mesh.name = /def Xform "(\w+)"/.exec( name )[ 1 ];
|
|
|
|
}
|
|
|
|
group.add( mesh );
|
|
|
|
buildHierarchy( data[ name ], mesh );
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
const group = new Group();
|
|
|
|
buildHierarchy( root, group );
|
|
|
|
return group;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
export { USDZLoader };
|