From 985bc197d3cdb3d012541525a9b5d38774403362 Mon Sep 17 00:00:00 2001 From: yma16 <17685043634@163.com> Date: Mon, 12 Oct 2020 22:59:19 +0800 Subject: [PATCH] =?UTF-8?q?=E4=B8=8A=E4=BC=A0=E6=96=B0=E6=96=87=E4=BB=B6?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- loadmodel_views/js/MTLLoader.js | 561 ++++++++++++++++++++++++++++++++ 1 file changed, 561 insertions(+) create mode 100644 loadmodel_views/js/MTLLoader.js diff --git a/loadmodel_views/js/MTLLoader.js b/loadmodel_views/js/MTLLoader.js new file mode 100644 index 0000000..c275d67 --- /dev/null +++ b/loadmodel_views/js/MTLLoader.js @@ -0,0 +1,561 @@ +/** + * Loads a Wavefront .mtl file specifying materials + * + * @author angelxuanchang + */ + +THREE.MTLLoader = function ( manager ) { + + this.manager = ( manager !== undefined ) ? manager : THREE.DefaultLoadingManager; + +}; + +THREE.MTLLoader.prototype = { + + constructor: THREE.MTLLoader, + + /** + * Loads and parses a MTL asset from a URL. + * + * @param {String} url - URL to the MTL file. + * @param {Function} [onLoad] - Callback invoked with the loaded object. + * @param {Function} [onProgress] - Callback for download progress. + * @param {Function} [onError] - Callback for download errors. + * + * @see setPath setTexturePath + * + * @note In order for relative texture references to resolve correctly + * you must call setPath and/or setTexturePath explicitly prior to load. + */ + load: function ( url, onLoad, onProgress, onError ) { + + var scope = this; + + var loader = new THREE.FileLoader( this.manager ); + loader.setPath( this.path ); + loader.load( url, function ( text ) { + + onLoad( scope.parse( text ) ); + + }, onProgress, onError ); + + }, + + /** + * Set base path for resolving references. + * If set this path will be prepended to each loaded and found reference. + * + * @see setTexturePath + * @param {String} path + * @return {THREE.MTLLoader} + * + * @example + * mtlLoader.setPath( 'assets/obj/' ); + * mtlLoader.load( 'my.mtl', ... ); + */ + setPath: function ( path ) { + + this.path = path; + return this; + + }, + + /** + * Set base path for resolving texture references. + * If set this path will be prepended found texture reference. + * If not set and setPath is, it will be used as texture base path. + * + * @see setPath + * @param {String} path + * @return {THREE.MTLLoader} + * + * @example + * mtlLoader.setPath( 'assets/obj/' ); + * mtlLoader.setTexturePath( 'assets/textures/' ); + * mtlLoader.load( 'my.mtl', ... ); + */ + setTexturePath: function ( path ) { + + this.texturePath = path; + return this; + + }, + + setBaseUrl: function ( path ) { + + console.warn( 'THREE.MTLLoader: .setBaseUrl() is deprecated. Use .setTexturePath( path ) for texture path or .setPath( path ) for general base path instead.' ); + + return this.setTexturePath( path ); + + }, + + setCrossOrigin: function ( value ) { + + this.crossOrigin = value; + return this; + + }, + + setMaterialOptions: function ( value ) { + + this.materialOptions = value; + return this; + + }, + + /** + * Parses a MTL file. + * + * @param {String} text - Content of MTL file + * @return {THREE.MTLLoader.MaterialCreator} + * + * @see setPath setTexturePath + * + * @note In order for relative texture references to resolve correctly + * you must call setPath and/or setTexturePath explicitly prior to parse. + */ + parse: function ( text ) { + // 换行作为分界点分割字符串 + var lines = text.split( '\n' ); + var info = {}; + // \s 匹配任何空白字符,包括空格、制表符、换页符等等 + var delimiter_pattern = /\s+/; + var materialsInfo = {}; + + for ( var i = 0; i < lines.length; i ++ ) { + + var line = lines[ i ]; + // .trim()：删除字符串两端的空白字符。 + line = line.trim(); + + if ( line.length === 0 || line.charAt( 0 ) === '#' ) { + + // Blank line or comment ignore + continue; + + } + // 返回空格首次出现的位置 + var pos = line.indexOf( ' ' ); + // 提取mtl文件属性 + var key = ( pos >= 0 ) ? line.substring( 0, pos ) : line; + key = key.toLowerCase(); + // 提取mtl文件属性对应值的字符串 + var value = ( pos >= 0 ) ? line.substring( pos + 1 ) : ''; + value = value.trim(); + + if ( key === 'newmtl' ) { + + // New material + + info = { name: value }; + materialsInfo[ value ] = info; + + } else if ( info ) { + + if ( key === 'ka' || key === 'kd' || key === 'ks' ) { + // 分割属性值对应的字符串 + var ss = value.split( delimiter_pattern, 3 ); + info[ key ] = [ parseFloat( ss[ 0 ] ), parseFloat( ss[ 1 ] ), parseFloat( ss[ 2 ] ) ]; + + } else { + + info[ key ] = value; + + } + + } + + } + + var materialCreator = new THREE.MTLLoader.MaterialCreator( this.texturePath || this.path, this.materialOptions ); + materialCreator.setCrossOrigin( this.crossOrigin ); + materialCreator.setManager( this.manager ); + materialCreator.setMaterials( materialsInfo ); + return materialCreator; + + } + +}; + +/** + * Create a new THREE-MTLLoader.MaterialCreator + * @param baseUrl - Url relative to which textures are loaded + * @param options - Set of options on how to construct the materials + * side: Which side to apply the material + * THREE.FrontSide (default), THREE.BackSide, THREE.DoubleSide + * wrap: What type of wrapping to apply for textures + * THREE.RepeatWrapping (default), THREE.ClampToEdgeWrapping, THREE.MirroredRepeatWrapping + * normalizeRGB: RGBs need to be normalized to 0-1 from 0-255 + * Default: false, assumed to be already normalized + * ignoreZeroRGBs: Ignore values of RGBs (Ka,Kd,Ks) that are all 0's + * Default: false + * @constructor + */ + +THREE.MTLLoader.MaterialCreator = function ( baseUrl, options ) { + + this.baseUrl = baseUrl || ''; + this.options = options; + this.materialsInfo = {}; + this.materials = {}; + this.materialsArray = []; + this.nameLookup = {}; + + this.side = ( this.options && this.options.side ) ? this.options.side : THREE.FrontSide; + this.wrap = ( this.options && this.options.wrap ) ? this.options.wrap : THREE.RepeatWrapping; + +}; + +THREE.MTLLoader.MaterialCreator.prototype = { + + constructor: THREE.MTLLoader.MaterialCreator, + + crossOrigin: 'Anonymous', + + setCrossOrigin: function ( value ) { + + this.crossOrigin = value; + + }, + + setManager: function ( value ) { + + this.manager = value; + + }, + + setMaterials: function ( materialsInfo ) { + + this.materialsInfo = this.convert( materialsInfo ); + this.materials = {}; + this.materialsArray = []; + this.nameLookup = {}; + + }, + + convert: function ( materialsInfo ) { + + if ( ! this.options ) return materialsInfo; + + var converted = {}; + + for ( var mn in materialsInfo ) { + + // Convert materials info into normalized form based on options + + var mat = materialsInfo[ mn ]; + + var covmat = {}; + + converted[ mn ] = covmat; + + for ( var prop in mat ) { + + var save = true; + var value = mat[ prop ]; + var lprop = prop.toLowerCase(); + + switch ( lprop ) { + + case 'kd': + case 'ka': + case 'ks': + + // Diffuse color (color under white light) using RGB values + + if ( this.options && this.options.normalizeRGB ) { + + value = [ value[ 0 ] / 255, value[ 1 ] / 255, value[ 2 ] / 255 ]; + + } + + if ( this.options && this.options.ignoreZeroRGBs ) { + + if ( value[ 0 ] === 0 && value[ 1 ] === 0 && value[ 2 ] === 0 ) { + + // ignore + + save = false; + + } + + } + + break; + + default: + + break; + + } + + if ( save ) { + + covmat[ lprop ] = value; + + } + + } + + } + + return converted; + + }, + + preload: function () { + + for ( var mn in this.materialsInfo ) { + + this.create( mn ); + + } + + }, + + getIndex: function ( materialName ) { + + return this.nameLookup[ materialName ]; + + }, + + getAsArray: function () { + + var index = 0; + + for ( var mn in this.materialsInfo ) { + + this.materialsArray[ index ] = this.create( mn ); + this.nameLookup[ mn ] = index; + index ++; + + } + + return this.materialsArray; + + }, + + create: function ( materialName ) { + + if ( this.materials[ materialName ] === undefined ) { + + this.createMaterial_( materialName ); + + } + + return this.materials[ materialName ]; + + }, + + createMaterial_: function ( materialName ) { + + // Create material + + var scope = this; + var mat = this.materialsInfo[ materialName ]; + var params = { + + name: materialName, + side: this.side + + }; + + function resolveURL( baseUrl, url ) { + + if ( typeof url !== 'string' || url === '' ) + return ''; + + // Absolute URL + if ( /^https?:\/\//i.test( url ) ) return url; + + return baseUrl + url; + + } + + function setMapForType( mapType, value ) { + + if ( params[ mapType ] ) return; // Keep the first encountered texture + + var texParams = scope.getTextureParams( value, params ); + var map = scope.loadTexture( resolveURL( scope.baseUrl, texParams.url ) ); + + map.repeat.copy( texParams.scale ); + map.offset.copy( texParams.offset ); + + map.wrapS = scope.wrap; + map.wrapT = scope.wrap; + + params[ mapType ] = map; + + } + + for ( var prop in mat ) { + + var value = mat[ prop ]; + var n; + + if ( value === '' ) continue; + + switch ( prop.toLowerCase() ) { + + // Ns is material specular exponent + + case 'kd': + + // Diffuse color (color under white light) using RGB values + + params.color = new THREE.Color().fromArray( value ); + + break; + + case 'ks': + + // Specular color (color when light is reflected from shiny surface) using RGB values + params.specular = new THREE.Color().fromArray( value ); + + break; + + case 'map_kd': + + // Diffuse texture map + + setMapForType( "map", value ); + + break; + + case 'map_ks': + + // Specular map + + setMapForType( "specularMap", value ); + + break; + + case 'norm': + + setMapForType( "normalMap", value ); + + break; + + case 'map_bump': + case 'bump': + + // Bump texture map + + setMapForType( "bumpMap", value ); + + break; + + case 'ns': + + // The specular exponent (defines the focus of the specular highlight) + // A high exponent results in a tight, concentrated highlight. Ns values normally range from 0 to 1000. + + params.shininess = parseFloat( value ); + + break; + + case 'd': + n = parseFloat( value ); + + if ( n < 1 ) { + + params.opacity = n; + params.transparent = true; + + } + + break; + + case 'tr': + n = parseFloat( value ); + + if ( this.options && this.options.invertTrProperty ) n = 1 - n; + + if ( n > 0 ) { + + params.opacity = 1 - n; + params.transparent = true; + + } + + break; + + default: + break; + + } + + } + + this.materials[ materialName ] = new THREE.MeshPhongMaterial( params ); + return this.materials[ materialName ]; + + }, + + getTextureParams: function ( value, matParams ) { + + var texParams = { + + scale: new THREE.Vector2( 1, 1 ), + offset: new THREE.Vector2( 0, 0 ) + + }; + + var items = value.split( /\s+/ ); + var pos; + + pos = items.indexOf( '-bm' ); + + if ( pos >= 0 ) { + + matParams.bumpScale = parseFloat( items[ pos + 1 ] ); + items.splice( pos, 2 ); + + } + + pos = items.indexOf( '-s' ); + + if ( pos >= 0 ) { + + texParams.scale.set( parseFloat( items[ pos + 1 ] ), parseFloat( items[ pos + 2 ] ) ); + items.splice( pos, 4 ); // we expect 3 parameters here! + + } + + pos = items.indexOf( '-o' ); + + if ( pos >= 0 ) { + + texParams.offset.set( parseFloat( items[ pos + 1 ] ), parseFloat( items[ pos + 2 ] ) ); + items.splice( pos, 4 ); // we expect 3 parameters here! + + } + + texParams.url = items.join( ' ' ).trim(); + return texParams; + + }, + + loadTexture: function ( url, mapping, onLoad, onProgress, onError ) { + + var texture; + var loader = THREE.Loader.Handlers.get( url ); + var manager = ( this.manager !== undefined ) ? this.manager : THREE.DefaultLoadingManager; + + if ( loader === null ) { + + loader = new THREE.TextureLoader( manager ); + + } + + if ( loader.setCrossOrigin ) loader.setCrossOrigin( this.crossOrigin ); + texture = loader.load( url, onLoad, onProgress, onError ); + + if ( mapping !== undefined ) texture.mapping = mapping; + + return texture; + + } + +}; -- GitLab