ColladaParser constructor
Implementation
ColladaParser(this.manager, this.text, String? path, String crossOrigin){
final xml = XmlDocument.parse(text);
collada = xml.getElement('COLLADA')!;
asset = parseAsset( collada.getElement('asset')!);//getElementsByTagName( collada, 'asset' )[ 0 ]
textureLoader = TextureLoader(manager: manager, flipY: true);
textureLoader.setPath(path ?? '').setCrossOrigin(crossOrigin );
tgaLoader = TGALoader( manager );
tgaLoader.setPath(path ?? '' );
}