more cleanup of no longer used code

gradunwarp/core/utils.py

@@ -18,42 +18,6 @@
 # cv = CoordsVector(x=x, y=y, z=z)
 CoordsVector = namedtuple('CoordsVector', 'x, y, z')
 
-
-# this method is deprecated because it's slow and my suspicion that
-# the matrix expressions create unnecessary temp matrices which
-# are costly for huge matrices
-def transform_coordinates_old(A, M):
-    ''' 4x4 matrix M operates on orthogonal coordinates arrays
-    A1, A2, A3 to give B1, B2, B3
-    '''
-    A1 = A.x
-    A2 = A.y
-    A3 = A.z
-    B1 = A1 * M[0, 0] + A2 * M[0, 1] + A3 * M[0, 2] + M[0, 3]
-    B2 = A1 * M[1, 0] + A2 * M[1, 1] + A3 * M[1, 2] + M[1, 3]
-    B3 = A1 * M[2, 0] + A2 * M[2, 1] + A3 * M[2, 2] + M[2, 3]
-    return CoordsVector(B1, B2, B3)
-
-def transform_coordinates_old2(A, M):
-    ''' 4x4 matrix M operates on orthogonal coordinates arrays
-    A1, A2, A3 to give B1, B2, B3
-    '''
-    A1 = A.x
-    A2 = A.y
-    A3 = A.z
-    A1 = A1.astype(np.float32)
-    A2 = A2.astype(np.float32)
-    A3 = A3.astype(np.float32)
-    M = M.astype(np.float32)
-    try:
-        from .transform_coordinates_ext import _transform_coordinates
-    except ImportError:
-        raise ImportError('The transform_coordinates C extension module is missing.' \
-                           ' Fallback code not yet implemented.')
-
-    B1, B2, B3 = _transform_coordinates(A1, A2, A3, M)
-    return CoordsVector(B1, B2, B3)
-
 from nibabel.affines import apply_affine
 
 def transform_coordinates(A, M):
@@ -70,16 +34,4 @@ def get_vol_affine(infile):
     nibimage = nib.load(infile)
     return np.asanyarray(nibimage.dataobj), nibimage.affine
 
-
-# memoized factorial
-class Memoize:
-    def __init__(self, f):
-        self.f = f
-        self.memo = {}
-
-    def __call__(self, *args):
-        if not args in self.memo:
-            self.memo[args] = self.f(*args)
-        return self.memo[args]
-
 factorial = math.factorial