import os
from pathlib import Path
import numpy as np

def read_track(filename):
    track_file = os.path.join(str(Path(__file__).parent), filename)
    array=np.loadtxt(filename)
    sref=array[:,0]
    xref=array[:,1]
    yref=array[:,2]
    psiref=array[:,3]
    kapparef=array[:,4]
    return sref,xref,yref,psiref,kapparef