--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/js/STLLoader.js Thu Apr 06 15:03:40 2017 +0200
@@ -0,0 +1,280 @@
+/**
+ * @author aleeper / http://adamleeper.com/
+ * @author mrdoob / http://mrdoob.com/
+ * @author gero3 / https://github.com/gero3
+ * @author Mugen87 / https://github.com/Mugen87
+ *
+ * Description: A THREE loader for STL ASCII files, as created by Solidworks and other CAD programs.
+ *
+ * Supports both binary and ASCII encoded files, with automatic detection of type.
+ *
+ * The loader returns a non-indexed buffer geometry.
+ *
+ * Limitations:
+ * Binary decoding supports "Magics" color format (http://en.wikipedia.org/wiki/STL_(file_format)#Color_in_binary_STL).
+ * There is perhaps some question as to how valid it is to always assume little-endian-ness.
+ * ASCII decoding assumes file is UTF-8.
+ *
+ * Usage:
+ * var loader = new THREE.STLLoader();
+ * loader.load( './models/stl/slotted_disk.stl', function ( geometry ) {
+ * scene.add( new THREE.Mesh( geometry ) );
+ * });
+ *
+ * For binary STLs geometry might contain colors for vertices. To use it:
+ * // use the same code to load STL as above
+ * if (geometry.hasColors) {
+ * material = new THREE.MeshPhongMaterial({ opacity: geometry.alpha, vertexColors: THREE.VertexColors });
+ * } else { .... }
+ * var mesh = new THREE.Mesh( geometry, material );
+ */
+
+
+THREE.STLLoader = function ( manager ) {
+
+ this.manager = ( manager !== undefined ) ? manager : THREE.DefaultLoadingManager;
+
+};
+
+THREE.STLLoader.prototype = {
+
+ constructor: THREE.STLLoader,
+
+ load: function ( url, onLoad, onProgress, onError ) {
+
+ var scope = this;
+
+ var loader = new THREE.FileLoader( scope.manager );
+ loader.setResponseType( 'arraybuffer' );
+ loader.load( url, function ( text ) {
+
+ onLoad( scope.parse( text ) );
+
+ }, onProgress, onError );
+
+ },
+
+ parse: function ( data ) {
+
+ var isBinary = function () {
+
+ var expect, face_size, n_faces, reader;
+ reader = new DataView( binData );
+ face_size = ( 32 / 8 * 3 ) + ( ( 32 / 8 * 3 ) * 3 ) + ( 16 / 8 );
+ n_faces = reader.getUint32( 80, true );
+ expect = 80 + ( 32 / 8 ) + ( n_faces * face_size );
+
+ if ( expect === reader.byteLength ) {
+
+ return true;
+
+ }
+
+ // some binary files will have different size from expected,
+ // checking characters higher than ASCII to confirm is binary
+ var fileLength = reader.byteLength;
+ for ( var index = 0; index < fileLength; index ++ ) {
+
+ if ( reader.getUint8( index, false ) > 127 ) {
+
+ return true;
+
+ }
+
+ }
+
+ return false;
+
+ };
+
+ var binData = this.ensureBinary( data );
+
+ return isBinary() ? this.parseBinary( binData ) : this.parseASCII( this.ensureString( data ) );
+
+ },
+
+ parseBinary: function ( data ) {
+
+ var reader = new DataView( data );
+ var faces = reader.getUint32( 80, true );
+
+ var r, g, b, hasColors = false, colors;
+ var defaultR, defaultG, defaultB, alpha;
+
+ // process STL header
+ // check for default color in header ("COLOR=rgba" sequence).
+
+ for ( var index = 0; index < 80 - 10; index ++ ) {
+
+ if ( ( reader.getUint32( index, false ) == 0x434F4C4F /*COLO*/ ) &&
+ ( reader.getUint8( index + 4 ) == 0x52 /*'R'*/ ) &&
+ ( reader.getUint8( index + 5 ) == 0x3D /*'='*/ ) ) {
+
+ hasColors = true;
+ colors = [];
+
+ defaultR = reader.getUint8( index + 6 ) / 255;
+ defaultG = reader.getUint8( index + 7 ) / 255;
+ defaultB = reader.getUint8( index + 8 ) / 255;
+ alpha = reader.getUint8( index + 9 ) / 255;
+
+ }
+
+ }
+
+ var dataOffset = 84;
+ var faceLength = 12 * 4 + 2;
+
+ var geometry = new THREE.BufferGeometry();
+
+ var vertices = [];
+ var normals = [];
+
+ for ( var face = 0; face < faces; face ++ ) {
+
+ var start = dataOffset + face * faceLength;
+ var normalX = reader.getFloat32( start, true );
+ var normalY = reader.getFloat32( start + 4, true );
+ var normalZ = reader.getFloat32( start + 8, true );
+
+ if ( hasColors ) {
+
+ var packedColor = reader.getUint16( start + 48, true );
+
+ if ( ( packedColor & 0x8000 ) === 0 ) {
+
+ // facet has its own unique color
+
+ r = ( packedColor & 0x1F ) / 31;
+ g = ( ( packedColor >> 5 ) & 0x1F ) / 31;
+ b = ( ( packedColor >> 10 ) & 0x1F ) / 31;
+
+ } else {
+
+ r = defaultR;
+ g = defaultG;
+ b = defaultB;
+
+ }
+
+ }
+
+ for ( var i = 1; i <= 3; i ++ ) {
+
+ var vertexstart = start + i * 12;
+
+ vertices.push( reader.getFloat32( vertexstart, true ) );
+ vertices.push( reader.getFloat32( vertexstart + 4, true ) );
+ vertices.push( reader.getFloat32( vertexstart + 8, true ) );
+
+ normals.push( normalX, normalY, normalZ );
+
+ if ( hasColors ) {
+
+ colors.push( r, g, b );
+
+ }
+
+ }
+
+ }
+
+ geometry.addAttribute( 'position', new THREE.BufferAttribute( new Float32Array( vertices ), 3 ) );
+ geometry.addAttribute( 'normal', new THREE.BufferAttribute( new Float32Array( normals ), 3 ) );
+
+ if ( hasColors ) {
+
+ geometry.addAttribute( 'color', new THREE.BufferAttribute( new Float32Array( colors ), 3 ) );
+ geometry.hasColors = true;
+ geometry.alpha = alpha;
+
+ }
+
+ return geometry;
+
+ },
+
+ parseASCII: function ( data ) {
+
+ var geometry, length, patternFace, patternNormal, patternVertex, result, text;
+ geometry = new THREE.BufferGeometry();
+ patternFace = /facet([\s\S]*?)endfacet/g;
+
+ var vertices = [];
+ var normals = [];
+
+ var normal = new THREE.Vector3();
+
+ while ( ( result = patternFace.exec( data ) ) !== null ) {
+
+ text = result[ 0 ];
+ patternNormal = /normal[\s]+([\-+]?[0-9]+\.?[0-9]*([eE][\-+]?[0-9]+)?)+[\s]+([\-+]?[0-9]*\.?[0-9]+([eE][\-+]?[0-9]+)?)+[\s]+([\-+]?[0-9]*\.?[0-9]+([eE][\-+]?[0-9]+)?)+/g;
+
+ while ( ( result = patternNormal.exec( text ) ) !== null ) {
+
+ normal.x = parseFloat( result[ 1 ] );
+ normal.y = parseFloat( result[ 3 ] );
+ normal.z = parseFloat( result[ 5 ] );
+
+ }
+
+ patternVertex = /vertex[\s]+([\-+]?[0-9]+\.?[0-9]*([eE][\-+]?[0-9]+)?)+[\s]+([\-+]?[0-9]*\.?[0-9]+([eE][\-+]?[0-9]+)?)+[\s]+([\-+]?[0-9]*\.?[0-9]+([eE][\-+]?[0-9]+)?)+/g;
+
+ while ( ( result = patternVertex.exec( text ) ) !== null ) {
+
+ vertices.push( parseFloat( result[ 1 ] ), parseFloat( result[ 3 ] ), parseFloat( result[ 5 ] ) );
+ normals.push( normal.x, normal.y, normal.z );
+
+ }
+
+ }
+
+ geometry.addAttribute( 'position', new THREE.BufferAttribute( new Float32Array( vertices ), 3 ) );
+ geometry.addAttribute( 'normal', new THREE.BufferAttribute( new Float32Array( normals ), 3 ) );
+
+ return geometry;
+
+ },
+
+ ensureString: function ( buf ) {
+
+ if ( typeof buf !== "string" ) {
+
+ var array_buffer = new Uint8Array( buf );
+ var strArray = [];
+ for ( var i = 0; i < buf.byteLength; i ++ ) {
+
+ strArray.push(String.fromCharCode( array_buffer[ i ] )); // implicitly assumes little-endian
+
+ }
+ return strArray.join('');
+
+ } else {
+
+ return buf;
+
+ }
+
+ },
+
+ ensureBinary: function ( buf ) {
+
+ if ( typeof buf === "string" ) {
+
+ var array_buffer = new Uint8Array( buf.length );
+ for ( var i = 0; i < buf.length; i ++ ) {
+
+ array_buffer[ i ] = buf.charCodeAt( i ) & 0xff; // implicitly assumes little-endian
+
+ }
+ return array_buffer.buffer || array_buffer;
+
+ } else {
+
+ return buf;
+
+ }
+
+ }
+
+};