parse opacity of material

some model is transparent, so it should parse MAT_TRANSPARENCY, and convert MAT_TRANSPARENCY to material.oapcity

examples/js/loaders/TDSLoader.js

@@ -272,6 +272,12 @@ THREE.TDSLoader.prototype = Object.assign( Object.create( THREE.Loader.prototype
 				material.shininess = shininess;
 				this.debugMessage( '   Shininess : ' + shininess );
 
+			} else if ( next === MAT_TRANSPARENCY ) {
+
+				var opacity = this.readWord( data );
+				material.opacity = opacity*0.01;
+				this.debugMessage( '  Opacity : ' + opacity );
+                		material.transparent = opacity<100 ? true : false;
 			} else if ( next === MAT_TEXMAP ) {
 
 				this.debugMessage( '   ColorMap' );