444 lines
8.9 KiB
JavaScript
444 lines
8.9 KiB
JavaScript
/**
|
|
* Loads a Wavefront .mtl file specifying materials
|
|
*
|
|
* @author angelxuanchang
|
|
*/
|
|
|
|
THREE.MTLLoader = function( baseUrl, options, crossOrigin ) {
|
|
|
|
this.baseUrl = baseUrl;
|
|
this.options = options;
|
|
this.crossOrigin = crossOrigin;
|
|
|
|
};
|
|
|
|
THREE.MTLLoader.prototype = {
|
|
|
|
constructor: THREE.MTLLoader,
|
|
|
|
load: function ( url, onLoad, onProgress, onError ) {
|
|
|
|
var scope = this;
|
|
|
|
var loader = new THREE.XHRLoader();
|
|
loader.setCrossOrigin( this.crossOrigin );
|
|
loader.load( url, function ( text ) {
|
|
|
|
onLoad( scope.parse( text ) );
|
|
|
|
}, onProgress, onError );
|
|
|
|
},
|
|
|
|
/**
|
|
* Parses loaded MTL file
|
|
* @param text - Content of MTL file
|
|
* @return {THREE.MTLLoader.MaterialCreator}
|
|
*/
|
|
parse: function ( text ) {
|
|
|
|
var lines = text.split( "\n" );
|
|
var info = {};
|
|
var delimiter_pattern = /\s+/;
|
|
var materialsInfo = {};
|
|
|
|
for ( var i = 0; i < lines.length; i ++ ) {
|
|
|
|
var line = lines[ i ];
|
|
line = line.trim();
|
|
|
|
if ( line.length === 0 || line.charAt( 0 ) === '#' ) {
|
|
|
|
// Blank line or comment ignore
|
|
continue;
|
|
|
|
}
|
|
|
|
var pos = line.indexOf( ' ' );
|
|
|
|
var key = ( pos >= 0 ) ? line.substring( 0, pos ) : line;
|
|
key = key.toLowerCase();
|
|
|
|
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" ) {
|
|
|
|
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.baseUrl, this.options );
|
|
materialCreator.crossOrigin = this.crossOrigin
|
|
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
|
|
* invertTransparency: If transparency need to be inverted (inversion is needed if d = 0 is fully opaque)
|
|
* Default: false (d = 1 is fully opaque)
|
|
* @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,
|
|
|
|
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[ 1 ] === 0 ) {
|
|
|
|
// ignore
|
|
|
|
save = false;
|
|
|
|
}
|
|
}
|
|
|
|
break;
|
|
|
|
case 'd':
|
|
|
|
// According to MTL format (http://paulbourke.net/dataformats/mtl/):
|
|
// d is dissolve for current material
|
|
// factor of 1.0 is fully opaque, a factor of 0 is fully dissolved (completely transparent)
|
|
|
|
if ( this.options && this.options.invertTransparency ) {
|
|
|
|
value = 1 - value;
|
|
|
|
}
|
|
|
|
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 ) {
|
|
|
|
// console.log(materialName.indexOf(' ') === -1);
|
|
|
|
if ( this.materials[ materialName ] === undefined ) {
|
|
|
|
this.createMaterial_( materialName );
|
|
|
|
}
|
|
|
|
return this.materials[ materialName ];
|
|
|
|
},
|
|
|
|
createMaterial_: function ( materialName ) {
|
|
|
|
// Create material
|
|
|
|
var mat = this.materialsInfo[ materialName ];
|
|
var params = {
|
|
|
|
name: materialName,
|
|
side: this.side
|
|
|
|
};
|
|
|
|
for ( var prop in mat ) {
|
|
|
|
var value = mat[ prop ];
|
|
|
|
switch ( prop.toLowerCase() ) {
|
|
|
|
// Ns is material specular exponent
|
|
|
|
case 'kd':
|
|
|
|
// Diffuse color (color under white light) using RGB values
|
|
|
|
params[ 'diffuse' ] = new THREE.Color().fromArray( value );
|
|
|
|
break;
|
|
|
|
case 'ka':
|
|
|
|
// Ambient color (color under shadow) using RGB values
|
|
|
|
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
|
|
|
|
params[ 'map' ] = this.loadTexture( this.baseUrl + value );
|
|
params[ 'map' ].wrapS = this.wrap;
|
|
params[ 'map' ].wrapT = this.wrap;
|
|
|
|
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'] = value;
|
|
|
|
break;
|
|
|
|
case 'd':
|
|
|
|
// According to MTL format (http://paulbourke.net/dataformats/mtl/):
|
|
// d is dissolve for current material
|
|
// factor of 1.0 is fully opaque, a factor of 0 is fully dissolved (completely transparent)
|
|
|
|
if ( value < 1 ) {
|
|
|
|
params['transparent'] = true;
|
|
params['opacity'] = value;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case 'map_bump':
|
|
case 'bump':
|
|
|
|
// Bump texture map
|
|
|
|
if ( params[ 'bumpMap' ] ) break; // Avoid loading twice.
|
|
|
|
params[ 'bumpMap' ] = this.loadTexture( this.baseUrl + value );
|
|
params[ 'bumpMap' ].wrapS = this.wrap;
|
|
params[ 'bumpMap' ].wrapT = this.wrap;
|
|
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if ( params[ 'diffuse' ] ) {
|
|
|
|
params[ 'color' ] = params[ 'diffuse' ];
|
|
|
|
}
|
|
|
|
this.materials[ materialName ] = new THREE.MeshPhongMaterial( params );
|
|
return this.materials[ materialName ];
|
|
|
|
},
|
|
|
|
|
|
loadTexture: function ( url, mapping, onLoad, onError ) {
|
|
|
|
var texture;
|
|
var loader = THREE.Loader.Handlers.get( url );
|
|
|
|
if ( loader !== null ) {
|
|
|
|
texture = loader.load( url, onLoad );
|
|
|
|
} else {
|
|
|
|
texture = new THREE.Texture();
|
|
|
|
loader = new THREE.ImageLoader();
|
|
loader.crossOrigin = this.crossOrigin;
|
|
loader.load( url, function ( image ) {
|
|
|
|
texture.image = THREE.MTLLoader.ensurePowerOfTwo_( image );
|
|
texture.needsUpdate = true;
|
|
|
|
if ( onLoad ) onLoad( texture );
|
|
|
|
} );
|
|
|
|
}
|
|
|
|
if ( mapping !== undefined ) texture.mapping = mapping;
|
|
|
|
return texture;
|
|
|
|
}
|
|
|
|
};
|
|
|
|
THREE.MTLLoader.ensurePowerOfTwo_ = function ( image ) {
|
|
|
|
if ( ! THREE.Math.isPowerOfTwo( image.width ) || ! THREE.Math.isPowerOfTwo( image.height ) ) {
|
|
|
|
var canvas = document.createElement( "canvas" );
|
|
canvas.width = THREE.MTLLoader.nextHighestPowerOfTwo_( image.width );
|
|
canvas.height = THREE.MTLLoader.nextHighestPowerOfTwo_( image.height );
|
|
|
|
var ctx = canvas.getContext("2d");
|
|
ctx.drawImage( image, 0, 0, image.width, image.height, 0, 0, canvas.width, canvas.height );
|
|
return canvas;
|
|
|
|
}
|
|
|
|
return image;
|
|
|
|
};
|
|
|
|
THREE.MTLLoader.nextHighestPowerOfTwo_ = function( x ) {
|
|
|
|
-- x;
|
|
|
|
for ( var i = 1; i < 32; i <<= 1 ) {
|
|
|
|
x = x | x >> i;
|
|
|
|
}
|
|
|
|
return x + 1;
|
|
|
|
};
|
|
|
|
THREE.EventDispatcher.prototype.apply( THREE.MTLLoader.prototype );
|