Accueil / npm / three@0.152.1 / examples / jsm / loaders / USDZLoader.js
USDZLoader.js
import {
BufferAttribute,
BufferGeometry,
ClampToEdgeWrapping,
FileLoader,
Group,
Loader,
Mesh,
MeshStandardMaterial,
MirroredRepeatWrapping,
RepeatWrapping,
SRGBColorSpace,
TextureLoader,
Object3D,
} from 'three';
import * as fflate from '../libs/fflate.module.js';
class USDAParser {
parse( text ) {
const data = {};
const lines = text.split( '\n' );
const length = lines.length;
let current = 0;
let string = null;
let target = data;
const stack = [ data ];
// debugger;
function parseNextLine() {
const line = lines[ current ];
// console.log( line );
if ( line.includes( '=' ) ) {
const assignment = line.split( '=' );
const lhs = assignment[ 0 ].trim();
const rhs = assignment[ 1 ].trim();
if ( rhs.endsWith( '{' ) ) {
const group = {};
stack.push( group );
target[ lhs ] = group;
target = group;
} else {
target[ lhs ] = rhs;
}
} else if ( line.endsWith( '{' ) ) {
const group = target[ string ] || {};
stack.push( group );
target[ string ] = group;
target = group;
} else if ( line.endsWith( '}' ) ) {
stack.pop();
if ( stack.length === 0 ) return;
target = stack[ stack.length - 1 ];
} else if ( line.endsWith( '(' ) ) {
const meta = {};
stack.push( meta );
string = line.split( '(' )[ 0 ].trim() || string;
target[ string ] = meta;
target = meta;
} else if ( line.endsWith( ')' ) ) {
stack.pop();
target = stack[ stack.length - 1 ];
} else {
string = line.trim();
}
current ++;
if ( current < length ) {
parseNextLine();
}
}
parseNextLine();
return data;
}
}
class USDZLoader 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.setResponseType( 'arraybuffer' );
loader.setRequestHeader( scope.requestHeader );
loader.setWithCredentials( scope.withCredentials );
loader.load( url, function ( text ) {
try {
onLoad( scope.parse( text ) );
} catch ( e ) {
if ( onError ) {
onError( e );
} else {
console.error( e );
}
scope.manager.itemError( url );
}
}, onProgress, onError );
}
parse( buffer ) {
const parser = new USDAParser();
function parseAssets( zip ) {
const data = {};
const loader = new FileLoader();
loader.setResponseType( 'arraybuffer' );
for ( const filename in zip ) {
if ( filename.endsWith( 'png' ) ) {
const blob = new Blob( [ zip[ filename ] ], { type: { type: 'image/png' } } );
data[ filename ] = URL.createObjectURL( blob );
}
if ( filename.endsWith( 'usd' ) ) {
const text = fflate.strFromU8( zip[ filename ] );
data[ filename ] = parser.parse( text );
}
}
return data;
}
function findUSD( zip ) {
for ( const filename in zip ) {
if ( filename.endsWith( 'usda' ) ) {
return zip[ filename ];
}
}
}
const zip = fflate.unzipSync( new Uint8Array( buffer ) );
// console.log( zip );
const assets = parseAssets( zip );
// console.log( assets )
const file = findUSD( zip );
if ( file === undefined ) {
console.warn( 'THREE.USDZLoader: No usda file found.' );
return new Group();
}
// Parse file
const text = fflate.strFromU8( file );
const root = parser.parse( text );
// Build scene
function findMeshGeometry( data ) {
if ( ! data ) return undefined;
if ( 'prepend references' in data ) {
const reference = data[ 'prepend references' ];
const parts = reference.split( '@' );
const path = parts[ 1 ].replace( /^.\//, '' );
const id = parts[ 2 ].replace( /^<\//, '' ).replace( />$/, '' );
return findGeometry( assets[ path ], id );
}
return findGeometry( data );
}
function findGeometry( data, id ) {
if ( id !== undefined ) {
const def = `def "${id}"`;
if ( def in data ) {
return data[ def ];
}
}
for ( const name in data ) {
const object = data[ name ];
if ( name.startsWith( 'def Mesh' ) ) {
// Move points to Mesh
if ( 'point3f[] points' in data ) {
object[ 'point3f[] points' ] = data[ 'point3f[] points' ];
}
// Move st to Mesh
if ( 'float2[] primvars:st' in data ) {
object[ 'float2[] primvars:st' ] = data[ 'float2[] primvars:st' ];
}
// Move st indices to Mesh
if ( 'int[] primvars:st:indices' in data ) {
object[ 'int[] primvars:st:indices' ] = data[ 'int[] primvars:st:indices' ];
}
return object;
}
if ( typeof object === 'object' ) {
const geometry = findGeometry( object );
if ( geometry ) return geometry;
}
}
}
function buildGeometry( data ) {
if ( ! data ) return undefined;
let geometry = new BufferGeometry();
if ( 'int[] faceVertexIndices' in data ) {
const indices = JSON.parse( data[ 'int[] faceVertexIndices' ] );
geometry.setIndex( new BufferAttribute( new Uint16Array( indices ), 1 ) );
}
if ( 'point3f[] points' in data ) {
const positions = JSON.parse( data[ 'point3f[] points' ].replace( /[()]*/g, '' ) );
const attribute = new BufferAttribute( new Float32Array( positions ), 3 );
geometry.setAttribute( 'position', attribute );
}
if ( 'normal3f[] normals' in data ) {
const normals = JSON.parse( data[ 'normal3f[] normals' ].replace( /[()]*/g, '' ) );
const attribute = new BufferAttribute( new Float32Array( normals ), 3 );
geometry.setAttribute( 'normal', attribute );
} else {
geometry.computeVertexNormals();
}
if ( 'float2[] primvars:st' in data ) {
data[ 'texCoord2f[] primvars:st' ] = data[ 'float2[] primvars:st' ];
}
if ( 'texCoord2f[] primvars:st' in data ) {
const uvs = JSON.parse( data[ 'texCoord2f[] primvars:st' ].replace( /[()]*/g, '' ) );
const attribute = new BufferAttribute( new Float32Array( uvs ), 2 );
if ( 'int[] primvars:st:indices' in data ) {
geometry = geometry.toNonIndexed();
const indices = JSON.parse( data[ 'int[] primvars:st:indices' ] );
geometry.setAttribute( 'uv', toFlatBufferAttribute( attribute, indices ) );
} else {
geometry.setAttribute( 'uv', attribute );
}
}
return geometry;
}
function toFlatBufferAttribute( attribute, indices ) {
const array = attribute.array;
const itemSize = attribute.itemSize;
const array2 = new array.constructor( indices.length * itemSize );
let index = 0, index2 = 0;
for ( let i = 0, l = indices.length; i < l; i ++ ) {
index = indices[ i ] * itemSize;
for ( let j = 0; j < itemSize; j ++ ) {
array2[ index2 ++ ] = array[ index ++ ];
}
}
return new BufferAttribute( array2, itemSize );
}
function findMeshMaterial( data ) {
if ( ! data ) return undefined;
if ( 'rel material:binding' in data ) {
const reference = data[ 'rel material:binding' ];
const id = reference.replace( /^<\//, '' ).replace( />$/, '' );
const parts = id.split( '/' );
return findMaterial( root, ` "${ parts[ 1 ] }"` );
}
return findMaterial( data );
}
function findMaterial( data, id = '' ) {
for ( const name in data ) {
const object = data[ name ];
if ( name.startsWith( 'def Material' + id ) ) {
return object;
}
if ( typeof object === 'object' ) {
const material = findMaterial( object, id );
if ( material ) return material;
}
}
}
function buildMaterial( data ) {
const material = new MeshStandardMaterial();
if ( data !== undefined ) {
if ( 'def Shader "PreviewSurface"' in data ) {
const surface = data[ 'def Shader "PreviewSurface"' ];
if ( 'color3f inputs:diffuseColor.connect' in surface ) {
const path = surface[ 'color3f inputs:diffuseColor.connect' ];
const sampler = findTexture( root, /(\w+).output/.exec( path )[ 1 ] );
material.map = buildTexture( sampler );
material.map.colorSpace = SRGBColorSpace;
} else if ( 'color3f inputs:diffuseColor' in surface ) {
const color = surface[ 'color3f inputs:diffuseColor' ].replace( /[()]*/g, '' );
material.color.fromArray( JSON.parse( '[' + color + ']' ) );
}
if ( 'normal3f inputs:normal.connect' in surface ) {
const path = surface[ 'normal3f inputs:normal.connect' ];
const sampler = findTexture( root, /(\w+).output/.exec( path )[ 1 ] );
material.normalMap = buildTexture( sampler );
}
if ( 'float inputs:roughness' in surface ) {
material.roughness = parseFloat( surface[ 'float inputs:roughness' ] );
}
if ( 'float inputs:metallic' in surface ) {
material.metalness = parseFloat( surface[ 'float inputs:metallic' ] );
}
}
if ( 'def Shader "diffuseColor_texture"' in data ) {
const sampler = data[ 'def Shader "diffuseColor_texture"' ];
material.map = buildTexture( sampler );
material.map.colorSpace = SRGBColorSpace;
}
if ( 'def Shader "normal_texture"' in data ) {
const sampler = data[ 'def Shader "normal_texture"' ];
material.normalMap = buildTexture( sampler );
}
}
return material;
}
function findTexture( data, id ) {
for ( const name in data ) {
const object = data[ name ];
if ( name.startsWith( `def Shader "${ id }"` ) ) {
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 };