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618 lines
11 KiB
618 lines
11 KiB
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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Loader,
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Mesh,
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MeshStandardMaterial,
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MirroredRepeatWrapping,
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RepeatWrapping,
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sRGBEncoding,
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TextureLoader,
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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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const length = lines.length;
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let current = 0;
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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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function parseNextLine() {
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const line = lines[ current ];
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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 ) return;
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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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current ++;
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if ( current < length ) {
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parseNextLine();
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}
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}
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parseNextLine();
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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' ) ) {
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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 findUSD( zip ) {
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for ( const filename in zip ) {
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if ( filename.endsWith( 'usda' ) ) {
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return zip[ filename ];
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}
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}
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}
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const zip = fflate.unzipSync( new Uint8Array( buffer ) ); // eslint-disable-line no-undef
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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 ( '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 ( id !== undefined ) {
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const def = `def "%{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 ( 'float2[] primvars:st' in data ) {
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object[ 'float2[] primvars:st' ] = data[ 'float2[] 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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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( new BufferAttribute( new Uint16Array( indices ), 1 ) );
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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 ( '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 buildMaterial( data ) {
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const material = new MeshStandardMaterial();
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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.encoding = sRGBEncoding;
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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 ( '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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}
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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' in surface ) {
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material.metalness = parseFloat( surface[ 'float inputs:metallic' ] );
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}
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}
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if ( 'def Shader "diffuseColor_texture"' in data ) {
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const sampler = data[ 'def Shader "diffuseColor_texture"' ];
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material.map = buildTexture( sampler );
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material.map.encoding = sRGBEncoding;
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}
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if ( 'def Shader "normal_texture"' in data ) {
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const sampler = data[ 'def Shader "normal_texture"' ];
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material.normalMap = buildTexture( sampler );
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}
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}
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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 ) {
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const object = data[ name ];
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if ( name.startsWith( `def Shader "${ id }"` ) ) {
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return object;
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}
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if ( typeof object === 'object' ) {
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const texture = findTexture( object, id );
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if ( texture ) return texture;
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}
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}
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}
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function buildTexture( data ) {
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if ( 'asset inputs:file' in data ) {
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const path = data[ 'asset inputs:file' ].replace( /@*/g, '' );
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const loader = new TextureLoader();
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const texture = loader.load( assets[ path ] );
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const map = {
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'"clamp"': ClampToEdgeWrapping,
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'"mirror"': MirroredRepeatWrapping,
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'"repeat"': RepeatWrapping
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};
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if ( 'token inputs:wrapS' in data ) {
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texture.wrapS = map[ data[ 'token inputs:wrapS' ] ];
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}
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if ( 'token inputs:wrapT' in data ) {
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texture.wrapT = map[ data[ 'token inputs:wrapT' ] ];
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}
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return texture;
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}
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return null;
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}
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function buildMesh( data ) {
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const geometry = buildGeometry( findMeshGeometry( data ) );
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const material = buildMaterial( findMeshMaterial( data ) );
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const mesh = new Mesh( geometry, material );
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if ( 'matrix4d xformOp:transform' in data ) {
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const array = JSON.parse( '[' + data[ 'matrix4d xformOp:transform' ].replace( /[()]*/g, '' ) + ']' );
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mesh.matrix.fromArray( array );
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mesh.matrix.decompose( mesh.position, mesh.quaternion, mesh.scale );
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}
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return mesh;
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}
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// console.log( data );
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const group = new Group();
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for ( const name in root ) {
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if ( name.startsWith( 'def Xform' ) ) {
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const mesh = buildMesh( root[ name ] );
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if ( /def Xform "(\w+)"/.test( name ) ) {
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mesh.name = /def Xform "(\w+)"/.exec( name )[ 1 ];
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}
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group.add( mesh );
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}
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}
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// console.log( group );
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return group;
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}
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}
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export { USDZLoader };
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