Examples: IFCLoader clean up.

Author: mrdoob

examples/jsm/loaders/IFCLoader.js

@@ -0,0 +1,176 @@
+//Example: https://github.com/tomvandig/web-ifc-three/tree/main/examples/jsm
+
+import { IfcAPI } from './ifc/web-ifc-api.js';
+import {
+	FileLoader,
+	Loader,
+	Object3D,
+	Mesh,
+	Color,
+	MeshPhongMaterial,
+	DoubleSide,
+	Matrix4,
+	BufferGeometry,
+	InterleavedBuffer,
+	InterleavedBufferAttribute,
+	BufferAttribute,
+} from '../../../../build/three.module.js';
+
+var ifcAPI = new IfcAPI();
+ifcAPI.Init();
+
+function IFCLoader( manager ) {
+
+	Loader.call( this, manager );
+
+}
+
+IFCLoader.prototype = Object.assign( Object.create( Loader.prototype ), {
+
+	constructor: IFCLoader,
+
+	load: function ( url, onLoad, onProgress, onError ) {
+
+		var scope = this;
+
+		var loader = new FileLoader( scope.manager );
+		loader.setPath( scope.path );
+		loader.setResponseType( 'arraybuffer' );
+		loader.setRequestHeader( scope.requestHeader );
+		loader.setWithCredentials( scope.withCredentials );
+		loader.load(
+			url,
+			function ( buffer ) {
+
+				try {
+
+					onLoad( scope.parse( buffer ) );
+
+				} catch ( e ) {
+
+					if ( onError ) {
+
+						onError( e );
+
+					} else {
+
+						console.error( e );
+
+					}
+
+					scope.manager.itemError( url );
+
+				}
+
+			},
+			onProgress,
+			onError
+		);
+
+	},
+
+	parse: ( function () {
+
+		return function ( buffer ) {
+
+			var data = new Uint8Array( buffer );
+			var modelID = ifcAPI.OpenModel( 'example.ifc', data );
+			return loadAllGeometry( modelID );
+
+			function loadAllGeometry( modelID ) {
+
+				var flatMeshes = getFlatMeshes( modelID );
+				var mainObject = new Object3D();
+				for ( var i = 0; i < flatMeshes.size(); i ++ ) {
+
+					var placedGeometries = flatMeshes.get( i ).geometries;
+					for ( var j = 0; j < placedGeometries.size(); j ++ )
+						mainObject.add( getPlacedGeometry( modelID, placedGeometries.get( j ) ) );
+
+				}
+
+				return mainObject;
+
+			}
+
+			function getFlatMeshes( modelID ) {
+
+				var flatMeshes = ifcAPI.LoadAllGeometry( modelID );
+				return flatMeshes;
+
+			}
+
+			function getPlacedGeometry( modelID, placedGeometry ) {
+
+				var geometry = getBufferGeometry( modelID, placedGeometry );
+				var material = getMeshMaterial( placedGeometry.color );
+				var mesh = new Mesh( geometry, material );
+				mesh.matrix = getMeshMatrix( placedGeometry.flatTransformation );
+				mesh.matrixAutoUpdate = false;
+				return mesh;
+
+			}
+
+			function getBufferGeometry( modelID, placedGeometry ) {
+
+				var geometry = ifcAPI.GetGeometry(
+					modelID,
+					placedGeometry.geometryExpressID
+				);
+				var verts = ifcAPI.GetVertexArray(
+					geometry.GetVertexData(),
+					geometry.GetVertexDataSize()
+				);
+				var indices = ifcAPI.GetIndexArray(
+					geometry.GetIndexData(),
+					geometry.GetIndexDataSize()
+				);
+				var bufferGeometry = ifcGeometryToBuffer( verts, indices );
+				return bufferGeometry;
+
+			}
+
+			function getMeshMaterial( color ) {
+
+				var col = new Color( color.x, color.y, color.z );
+				var material = new MeshPhongMaterial( { color: col, side: DoubleSide } );
+				material.transparent = color.w !== 1;
+				if ( material.transparent ) material.opacity = color.w;
+				return material;
+
+			}
+
+			function getMeshMatrix( matrix ) {
+
+				var mat = new Matrix4();
+				mat.fromArray( matrix );
+				// mat.elements[15 - 3] *= 0.001;
+				// mat.elements[15 - 2] *= 0.001;
+				// mat.elements[15 - 1] *= 0.001;
+				return mat;
+
+			}
+
+			function ifcGeometryToBuffer( vertexData, indexData ) {
+
+				var geometry = new BufferGeometry();
+				var buffer32 = new InterleavedBuffer( vertexData, 6 );
+				geometry.setAttribute(
+					'position',
+					new InterleavedBufferAttribute( buffer32, 3, 0 )
+				);
+				geometry.setAttribute(
+					'normal',
+					new InterleavedBufferAttribute( buffer32, 3, 3 )
+				);
+				geometry.setIndex( new BufferAttribute( indexData, 1 ) );
+				return geometry;
+
+			}
+
+		};
+
+	} )(),
+} );
+
+export { IFCLoader };