misc.py 文件源码

def spherical_to_cartesian(s,degrees=True,normalize=False):
   '''
   Takes a vector in spherical coordinates and converts it to cartesian.
   Assumes the input vector is given as [radius,colat,lon] 
   '''

   if degrees:
      s[1] = np.radians(s[1])  
      s[2] = np.radians(s[2])

   x1 = s[0]*np.sin(s[1])*np.cos(s[2])
   x2 = s[0]*np.sin(s[1])*np.sin(s[2])
   x3 = s[0]*np.cos(s[1])

   x = [x1,x2,x3]

   if normalize:
      x /= np.linalg.norm(x)
   return x