code: private void addNormal(String data)
  	{
  		String coords[] = data.split("\\s+");
  		float x = 0;
  		float y = 0;
  		float z = 0;
  		if (coords.length != 3)
  		{
  			MalisisCore.log.error(	"[ObjFileImporter] Wrong Normal coordinates number {} at line {} : {}",
  									coords.length,
  									lineNumber,
  									currentLine);
  		}
  		else
  		{
  			x = Float.parseFloat(coords[0]);
  			y = Float.parseFloat(coords[1]);
  			z = Float.parseFloat(coords[2]);
  		}
  
  		normals.add(new Vector(x, y, z));
  	}
docs: Creates a new normal {@link Vector} from data and adds it to {@link #normals}.
  
  @param data the data