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522 lines
10 KiB
522 lines
10 KiB
6 months ago
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import {
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BufferGeometry,
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Color,
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FileLoader,
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Float32BufferAttribute,
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Group,
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Loader,
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Mesh,
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MeshPhongMaterial
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} from 'three';
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import * as fflate from '../libs/fflate.module.js';
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/**
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* Description: Early release of an AMF Loader following the pattern of the
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* example loaders in the three.js project.
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*
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* Usage:
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* const loader = new AMFLoader();
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* loader.load('/path/to/project.amf', function(objecttree) {
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* scene.add(objecttree);
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* });
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*
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* Materials now supported, material colors supported
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* Zip support, requires fflate
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* No constellation support (yet)!
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*
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*/
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class AMFLoader 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( data ) {
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function loadDocument( data ) {
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let view = new DataView( data );
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const magic = String.fromCharCode( view.getUint8( 0 ), view.getUint8( 1 ) );
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if ( magic === 'PK' ) {
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let zip = null;
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let file = null;
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console.log( 'THREE.AMFLoader: Loading Zip' );
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try {
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zip = fflate.unzipSync( new Uint8Array( data ) );
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} catch ( e ) {
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if ( e instanceof ReferenceError ) {
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console.log( 'THREE.AMFLoader: fflate missing and file is compressed.' );
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return null;
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}
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}
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for ( file in zip ) {
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if ( file.toLowerCase().slice( - 4 ) === '.amf' ) {
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break;
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}
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}
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console.log( 'THREE.AMFLoader: Trying to load file asset: ' + file );
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view = new DataView( zip[ file ].buffer );
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}
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const fileText = new TextDecoder().decode( view );
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const xmlData = new DOMParser().parseFromString( fileText, 'application/xml' );
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if ( xmlData.documentElement.nodeName.toLowerCase() !== 'amf' ) {
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console.log( 'THREE.AMFLoader: Error loading AMF - no AMF document found.' );
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return null;
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}
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return xmlData;
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}
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function loadDocumentScale( node ) {
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let scale = 1.0;
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let unit = 'millimeter';
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if ( node.documentElement.attributes.unit !== undefined ) {
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unit = node.documentElement.attributes.unit.value.toLowerCase();
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}
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const scaleUnits = {
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millimeter: 1.0,
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inch: 25.4,
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feet: 304.8,
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meter: 1000.0,
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micron: 0.001
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};
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if ( scaleUnits[ unit ] !== undefined ) {
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scale = scaleUnits[ unit ];
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}
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console.log( 'THREE.AMFLoader: Unit scale: ' + scale );
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return scale;
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}
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function loadMaterials( node ) {
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let matName = 'AMF Material';
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const matId = node.attributes.id.textContent;
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let color = { r: 1.0, g: 1.0, b: 1.0, a: 1.0 };
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let loadedMaterial = null;
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for ( let i = 0; i < node.childNodes.length; i ++ ) {
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const matChildEl = node.childNodes[ i ];
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if ( matChildEl.nodeName === 'metadata' && matChildEl.attributes.type !== undefined ) {
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if ( matChildEl.attributes.type.value === 'name' ) {
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matName = matChildEl.textContent;
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}
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} else if ( matChildEl.nodeName === 'color' ) {
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color = loadColor( matChildEl );
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}
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}
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loadedMaterial = new MeshPhongMaterial( {
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flatShading: true,
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color: new Color( color.r, color.g, color.b ),
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name: matName
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} );
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if ( color.a !== 1.0 ) {
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loadedMaterial.transparent = true;
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loadedMaterial.opacity = color.a;
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}
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return { id: matId, material: loadedMaterial };
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}
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function loadColor( node ) {
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const color = { r: 1.0, g: 1.0, b: 1.0, a: 1.0 };
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for ( let i = 0; i < node.childNodes.length; i ++ ) {
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const matColor = node.childNodes[ i ];
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if ( matColor.nodeName === 'r' ) {
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color.r = matColor.textContent;
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} else if ( matColor.nodeName === 'g' ) {
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color.g = matColor.textContent;
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} else if ( matColor.nodeName === 'b' ) {
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color.b = matColor.textContent;
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} else if ( matColor.nodeName === 'a' ) {
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color.a = matColor.textContent;
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}
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}
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return color;
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}
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function loadMeshVolume( node ) {
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const volume = { name: '', triangles: [], materialid: null };
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let currVolumeNode = node.firstElementChild;
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if ( node.attributes.materialid !== undefined ) {
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volume.materialId = node.attributes.materialid.nodeValue;
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}
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while ( currVolumeNode ) {
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if ( currVolumeNode.nodeName === 'metadata' ) {
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if ( currVolumeNode.attributes.type !== undefined ) {
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if ( currVolumeNode.attributes.type.value === 'name' ) {
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volume.name = currVolumeNode.textContent;
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}
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}
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} else if ( currVolumeNode.nodeName === 'triangle' ) {
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const v1 = currVolumeNode.getElementsByTagName( 'v1' )[ 0 ].textContent;
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const v2 = currVolumeNode.getElementsByTagName( 'v2' )[ 0 ].textContent;
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const v3 = currVolumeNode.getElementsByTagName( 'v3' )[ 0 ].textContent;
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volume.triangles.push( v1, v2, v3 );
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}
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currVolumeNode = currVolumeNode.nextElementSibling;
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}
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return volume;
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}
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function loadMeshVertices( node ) {
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const vertArray = [];
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const normalArray = [];
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let currVerticesNode = node.firstElementChild;
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while ( currVerticesNode ) {
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if ( currVerticesNode.nodeName === 'vertex' ) {
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let vNode = currVerticesNode.firstElementChild;
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while ( vNode ) {
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if ( vNode.nodeName === 'coordinates' ) {
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const x = vNode.getElementsByTagName( 'x' )[ 0 ].textContent;
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const y = vNode.getElementsByTagName( 'y' )[ 0 ].textContent;
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const z = vNode.getElementsByTagName( 'z' )[ 0 ].textContent;
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vertArray.push( x, y, z );
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} else if ( vNode.nodeName === 'normal' ) {
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const nx = vNode.getElementsByTagName( 'nx' )[ 0 ].textContent;
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const ny = vNode.getElementsByTagName( 'ny' )[ 0 ].textContent;
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const nz = vNode.getElementsByTagName( 'nz' )[ 0 ].textContent;
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normalArray.push( nx, ny, nz );
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}
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vNode = vNode.nextElementSibling;
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}
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}
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currVerticesNode = currVerticesNode.nextElementSibling;
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}
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return { 'vertices': vertArray, 'normals': normalArray };
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}
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function loadObject( node ) {
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const objId = node.attributes.id.textContent;
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const loadedObject = { name: 'amfobject', meshes: [] };
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let currColor = null;
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let currObjNode = node.firstElementChild;
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while ( currObjNode ) {
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if ( currObjNode.nodeName === 'metadata' ) {
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if ( currObjNode.attributes.type !== undefined ) {
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if ( currObjNode.attributes.type.value === 'name' ) {
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loadedObject.name = currObjNode.textContent;
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}
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}
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} else if ( currObjNode.nodeName === 'color' ) {
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currColor = loadColor( currObjNode );
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} else if ( currObjNode.nodeName === 'mesh' ) {
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let currMeshNode = currObjNode.firstElementChild;
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const mesh = { vertices: [], normals: [], volumes: [], color: currColor };
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while ( currMeshNode ) {
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if ( currMeshNode.nodeName === 'vertices' ) {
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const loadedVertices = loadMeshVertices( currMeshNode );
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mesh.normals = mesh.normals.concat( loadedVertices.normals );
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mesh.vertices = mesh.vertices.concat( loadedVertices.vertices );
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} else if ( currMeshNode.nodeName === 'volume' ) {
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mesh.volumes.push( loadMeshVolume( currMeshNode ) );
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}
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currMeshNode = currMeshNode.nextElementSibling;
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}
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loadedObject.meshes.push( mesh );
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}
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currObjNode = currObjNode.nextElementSibling;
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}
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return { 'id': objId, 'obj': loadedObject };
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}
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const xmlData = loadDocument( data );
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let amfName = '';
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let amfAuthor = '';
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const amfScale = loadDocumentScale( xmlData );
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const amfMaterials = {};
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const amfObjects = {};
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const childNodes = xmlData.documentElement.childNodes;
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let i, j;
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for ( i = 0; i < childNodes.length; i ++ ) {
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const child = childNodes[ i ];
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if ( child.nodeName === 'metadata' ) {
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if ( child.attributes.type !== undefined ) {
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if ( child.attributes.type.value === 'name' ) {
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amfName = child.textContent;
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} else if ( child.attributes.type.value === 'author' ) {
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amfAuthor = child.textContent;
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}
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}
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} else if ( child.nodeName === 'material' ) {
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const loadedMaterial = loadMaterials( child );
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amfMaterials[ loadedMaterial.id ] = loadedMaterial.material;
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} else if ( child.nodeName === 'object' ) {
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const loadedObject = loadObject( child );
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amfObjects[ loadedObject.id ] = loadedObject.obj;
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}
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}
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const sceneObject = new Group();
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const defaultMaterial = new MeshPhongMaterial( {
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name: Loader.DEFAULT_MATERIAL_NAME,
|
||
|
|
color: 0xaaaaff,
|
||
|
|
flatShading: true
|
||
|
|
} );
|
||
|
|
|
||
|
|
sceneObject.name = amfName;
|
||
|
|
sceneObject.userData.author = amfAuthor;
|
||
|
|
sceneObject.userData.loader = 'AMF';
|
||
|
|
|
||
|
|
for ( const id in amfObjects ) {
|
||
|
|
|
||
|
|
const part = amfObjects[ id ];
|
||
|
|
const meshes = part.meshes;
|
||
|
|
const newObject = new Group();
|
||
|
|
newObject.name = part.name || '';
|
||
|
|
|
||
|
|
for ( i = 0; i < meshes.length; i ++ ) {
|
||
|
|
|
||
|
|
let objDefaultMaterial = defaultMaterial;
|
||
|
|
const mesh = meshes[ i ];
|
||
|
|
const vertices = new Float32BufferAttribute( mesh.vertices, 3 );
|
||
|
|
let normals = null;
|
||
|
|
|
||
|
|
if ( mesh.normals.length ) {
|
||
|
|
|
||
|
|
normals = new Float32BufferAttribute( mesh.normals, 3 );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
if ( mesh.color ) {
|
||
|
|
|
||
|
|
const color = mesh.color;
|
||
|
|
|
||
|
|
objDefaultMaterial = defaultMaterial.clone();
|
||
|
|
objDefaultMaterial.color = new Color( color.r, color.g, color.b );
|
||
|
|
|
||
|
|
if ( color.a !== 1.0 ) {
|
||
|
|
|
||
|
|
objDefaultMaterial.transparent = true;
|
||
|
|
objDefaultMaterial.opacity = color.a;
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
const volumes = mesh.volumes;
|
||
|
|
|
||
|
|
for ( j = 0; j < volumes.length; j ++ ) {
|
||
|
|
|
||
|
|
const volume = volumes[ j ];
|
||
|
|
const newGeometry = new BufferGeometry();
|
||
|
|
let material = objDefaultMaterial;
|
||
|
|
|
||
|
|
newGeometry.setIndex( volume.triangles );
|
||
|
|
newGeometry.setAttribute( 'position', vertices.clone() );
|
||
|
|
|
||
|
|
if ( normals ) {
|
||
|
|
|
||
|
|
newGeometry.setAttribute( 'normal', normals.clone() );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
if ( amfMaterials[ volume.materialId ] !== undefined ) {
|
||
|
|
|
||
|
|
material = amfMaterials[ volume.materialId ];
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
newGeometry.scale( amfScale, amfScale, amfScale );
|
||
|
|
newObject.add( new Mesh( newGeometry, material.clone() ) );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
sceneObject.add( newObject );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
return sceneObject;
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
export { AMFLoader };
|