From 0fdefa5e78e52734ebce9ae2e4a2851ffe8c084e Mon Sep 17 00:00:00 2001
From: Martin Diehl <mail@martin-diehl.net>
Date: Thu, 3 Dec 2020 23:00:49 +0100
Subject: [PATCH] renames:

after the rename of "grid" to "cell", the name cell should not be used
for the coordinates of the cell centers. In agreement with the names
x_p/u_p for point positions/displacements, now the "point" is used to
refer to the materialpoints (i.e. cell centers)

Additionally, "_node"/"_point" are now suffixes to
"coordinates"/"displacements".

Finally, "coords" is renamed to "coordinates"
---
 processing/post/DADF5_postResults.py        |   8 +-
 processing/post/addCompatibilityMismatch.py |   6 +-
 processing/post/addCurl.py                  |   2 +-
 processing/post/addDisplacement.py          |  12 +-
 processing/post/addDivergence.py            |   2 +-
 processing/post/addEuclideanDistance.py     |   2 +-
 processing/post/addGradient.py              |   2 +-
 python/damask/_geom.py                      |  12 +-
 python/damask/_result.py                    |  10 +-
 python/damask/_rotation.py                  |   2 +-
 python/damask/grid_filters.py               | 160 ++++++++++----------
 python/damask/seeds.py                      |   4 +-
 python/tests/test_Geom.py                   |   4 +-
 python/tests/test_Result.py                 |   8 +-
 python/tests/test_Rotation.py               |   4 +-
 python/tests/test_VTK.py                    |   4 +-
 python/tests/test_grid_filters.py           |  76 +++++-----
 python/tests/test_seeds.py                  |   2 +-
 18 files changed, 161 insertions(+), 159 deletions(-)

diff --git a/processing/post/DADF5_postResults.py b/processing/post/DADF5_postResults.py
index be4f78569..a1b162e3d 100755
--- a/processing/post/DADF5_postResults.py
+++ b/processing/post/DADF5_postResults.py
@@ -33,12 +33,12 @@ for filename in options.filenames:
     results = damask.Result(filename)
 
     if not results.structured: continue
-    coords = damask.grid_filters.cell_coord0(results.grid,results.size,results.origin).reshape(-1,3,order='F')
+    coords = damask.grid_filters.coordinates0_point(results.cells,results.size,results.origin).reshape(-1,3,order='F')
 
     N_digits = int(np.floor(np.log10(int(results.increments[-1][3:]))))+1
     N_digits = 5 # hack to keep test intact
     for inc in damask.util.show_progress(results.iterate('increments'),len(results.increments)):
-        table = damask.Table(np.ones(np.product(results.grid),dtype=int)*int(inc[3:]),{'inc':(1,)})\
+        table = damask.Table(np.ones(np.product(results.cells),dtype=int)*int(inc[3:]),{'inc':(1,)})\
                       .add('pos',coords.reshape(-1,3))
 
         results.pick('homogenizations',False)
@@ -46,14 +46,14 @@ for filename in options.filenames:
         for label in options.con:
             x = results.get_dataset_location(label)
             if len(x) != 0:
-                table = table.add(label,results.read_dataset(x,0,plain=True).reshape(results.grid.prod(),-1))
+                table = table.add(label,results.read_dataset(x,0,plain=True).reshape(results.cells.prod(),-1))
 
         results.pick('phases',False)
         results.pick('homogenizations',True)
         for label in options.mat:
             x = results.get_dataset_location(label)
             if len(x) != 0:
-                table = table.add(label,results.read_dataset(x,0,plain=True).reshape(results.grid.prod(),-1))
+                table = table.add(label,results.read_dataset(x,0,plain=True).reshape(results.cells.prod(),-1))
 
         dirname  = os.path.abspath(os.path.join(os.path.dirname(filename),options.dir))
         if not os.path.isdir(dirname):
diff --git a/processing/post/addCompatibilityMismatch.py b/processing/post/addCompatibilityMismatch.py
index 1b4425e06..e3219d839 100755
--- a/processing/post/addCompatibilityMismatch.py
+++ b/processing/post/addCompatibilityMismatch.py
@@ -71,13 +71,13 @@ for name in filenames:
   damask.util.report(scriptName,name)
 
   table = damask.Table.load(StringIO(''.join(sys.stdin.read())) if name is None else name)
-  grid,size,origin = damask.grid_filters.cell_coord0_gridSizeOrigin(table.get(options.pos))
+  grid,size,origin = damask.grid_filters.cellSizeOrigin_coordinates0_point(table.get(options.pos))
 
   F = table.get(options.defgrad).reshape(tuple(grid)+(-1,),order='F').reshape(tuple(grid)+(3,3))
-  nodes = damask.grid_filters.node_coord(size,F)
+  nodes = damask.grid_filters.coordinates_node(size,F)
 
   if options.shape:
-    centers = damask.grid_filters.cell_coord(size,F)
+    centers = damask.grid_filters.coordinates_point(size,F)
     shapeMismatch = shapeMismatch(size,F,nodes,centers)
     table = table.add('shapeMismatch(({}))'.format(options.defgrad),
                       shapeMismatch.reshape(-1,1,order='F'),
diff --git a/processing/post/addCurl.py b/processing/post/addCurl.py
index d91c2be92..a6de51445 100755
--- a/processing/post/addCurl.py
+++ b/processing/post/addCurl.py
@@ -44,7 +44,7 @@ for name in filenames:
     damask.util.report(scriptName,name)
 
     table = damask.Table.load(StringIO(''.join(sys.stdin.read())) if name is None else name)
-    grid,size,origin = damask.grid_filters.cell_coord0_gridSizeOrigin(table.get(options.pos))
+    grid,size,origin = damask.grid_filters.cellSizeOrigin_coordinates0_point(table.get(options.pos))
 
     for label in options.labels:
         field = table.get(label)
diff --git a/processing/post/addDisplacement.py b/processing/post/addDisplacement.py
index c3ba4a8af..3d24d6f0c 100755
--- a/processing/post/addDisplacement.py
+++ b/processing/post/addDisplacement.py
@@ -48,24 +48,24 @@ for name in filenames:
     damask.util.report(scriptName,name)
 
     table = damask.Table.load(StringIO(''.join(sys.stdin.read())) if name is None else name)
-    grid,size,origin = damask.grid_filters.cell_coord0_gridSizeOrigin(table.get(options.pos))
+    grid,size,origin = damask.grid_filters.cellSizeOrigin_coordinates0_point(table.get(options.pos))
 
     F = table.get(options.f).reshape(tuple(grid)+(-1,),order='F').reshape(tuple(grid)+(3,3))
     if options.nodal:
-        damask.Table(damask.grid_filters.node_coord0(grid,size).reshape(-1,3,order='F'),
+        damask.Table(damask.grid_filters.coordinates0_node(grid,size).reshape(-1,3,order='F'),
                      {'pos':(3,)})\
               .add('avg({}).{}'.format(options.f,options.pos),
-                   damask.grid_filters.node_displacement_avg(size,F).reshape(-1,3,order='F'),
+                   damask.grid_filters.displacement_avg_node(size,F).reshape(-1,3,order='F'),
                    scriptID+' '+' '.join(sys.argv[1:]))\
               .add('fluct({}).{}'.format(options.f,options.pos),
-                   damask.grid_filters.node_displacement_fluct(size,F).reshape(-1,3,order='F'),
+                   damask.grid_filters.displacement_fluct_node(size,F).reshape(-1,3,order='F'),
                     scriptID+' '+' '.join(sys.argv[1:]))\
                .save((sys.stdout if name is None else os.path.splitext(name)[0]+'_nodal.txt'))
     else:
         table.add('avg({}).{}'.format(options.f,options.pos),
-                  damask.grid_filters.cell_displacement_avg(size,F).reshape(-1,3,order='F'),
+                  damask.grid_filters.displacement_avg_point(size,F).reshape(-1,3,order='F'),
                   scriptID+' '+' '.join(sys.argv[1:]))\
              .add('fluct({}).{}'.format(options.f,options.pos),
-                  damask.grid_filters.cell_displacement_fluct(size,F).reshape(-1,3,order='F'),
+                  damask.grid_filters.displacement_fluct_point(size,F).reshape(-1,3,order='F'),
                   scriptID+' '+' '.join(sys.argv[1:]))\
              .save((sys.stdout if name is None else name))
diff --git a/processing/post/addDivergence.py b/processing/post/addDivergence.py
index 6e5629285..e6bf1caa0 100755
--- a/processing/post/addDivergence.py
+++ b/processing/post/addDivergence.py
@@ -44,7 +44,7 @@ for name in filenames:
     damask.util.report(scriptName,name)
 
     table = damask.Table.load(StringIO(''.join(sys.stdin.read())) if name is None else name)
-    grid,size,origin = damask.grid_filters.cell_coord0_gridSizeOrigin(table.get(options.pos))
+    grid,size,origin = damask.grid_filters.cellSizeOrigin_coordinates0_point(table.get(options.pos))
 
     for label in options.labels:
         field = table.get(label)
diff --git a/processing/post/addEuclideanDistance.py b/processing/post/addEuclideanDistance.py
index 0c18bdccc..f35f5285a 100755
--- a/processing/post/addEuclideanDistance.py
+++ b/processing/post/addEuclideanDistance.py
@@ -143,7 +143,7 @@ for name in filenames:
     damask.util.report(scriptName,name)
 
     table = damask.Table.load(StringIO(''.join(sys.stdin.read())) if name is None else name)
-    grid,size,origin = damask.grid_filters.cell_coord0_gridSizeOrigin(table.get(options.pos))
+    grid,size,origin = damask.grid_filters.cellSizeOrigin_coordinates0_point(table.get(options.pos))
 
     neighborhood = neighborhoods[options.neighborhood]
     diffToNeighbor = np.empty(list(grid+2)+[len(neighborhood)],'i')
diff --git a/processing/post/addGradient.py b/processing/post/addGradient.py
index 147773734..66b122082 100755
--- a/processing/post/addGradient.py
+++ b/processing/post/addGradient.py
@@ -44,7 +44,7 @@ for name in filenames:
     damask.util.report(scriptName,name)
 
     table = damask.Table.load(StringIO(''.join(sys.stdin.read())) if name is None else name)
-    grid,size,origin = damask.grid_filters.cell_coord0_gridSizeOrigin(table.get(options.pos))
+    grid,size,origin = damask.grid_filters.cellSizeOrigin_coordinates0_point(table.get(options.pos))
 
     for label in options.labels:
         field = table.get(label)
diff --git a/python/damask/_geom.py b/python/damask/_geom.py
index 495ed05ac..8ccde0843 100644
--- a/python/damask/_geom.py
+++ b/python/damask/_geom.py
@@ -302,7 +302,7 @@ class Geom:
             Each unique combintation of values results in one material ID.
 
         """
-        cells,size,origin = grid_filters.cell_coord0_gridSizeOrigin(table.get(coordinates))
+        cells,size,origin = grid_filters.cellSizeOrigin_coordinates0_point(table.get(coordinates))
 
         labels_ = [labels] if isinstance(labels,str) else labels
         unique,unique_inverse = np.unique(np.hstack([table.get(l) for l in labels_]),return_inverse=True,axis=0)
@@ -344,11 +344,11 @@ class Geom:
             seeds_p = np.vstack((seeds  -np.array([size[0],0.,0.]),seeds,  seeds  +np.array([size[0],0.,0.])))
             seeds_p = np.vstack((seeds_p-np.array([0.,size[1],0.]),seeds_p,seeds_p+np.array([0.,size[1],0.])))
             seeds_p = np.vstack((seeds_p-np.array([0.,0.,size[2]]),seeds_p,seeds_p+np.array([0.,0.,size[2]])))
-            coords  = grid_filters.cell_coord0(cells*3,size*3,-size).reshape(-1,3)
+            coords  = grid_filters.coordinates0_point(cells*3,size*3,-size).reshape(-1,3)
         else:
             weights_p = weights
             seeds_p   = seeds
-            coords    = grid_filters.cell_coord0(cells,size).reshape(-1,3)
+            coords    = grid_filters.coordinates0_point(cells,size).reshape(-1,3)
 
         pool = mp.Pool(processes = int(environment.options['DAMASK_NUM_THREADS']))
         result = pool.map_async(partial(Geom._find_closest_seed,seeds_p,weights_p), [coord for coord in coords])
@@ -388,7 +388,7 @@ class Geom:
             Perform a periodic tessellation. Defaults to True.
 
         """
-        coords = grid_filters.cell_coord0(cells,size).reshape(-1,3)
+        coords = grid_filters.coordinates0_point(cells,size).reshape(-1,3)
         KDTree = spatial.cKDTree(seeds,boxsize=size) if periodic else spatial.cKDTree(seeds)
         devNull,material_ = KDTree.query(coords)
 
@@ -592,7 +592,7 @@ class Geom:
         c = (np.array(center) + .5)*self.size/self.cells if np.array(center).dtype    in np.sctypes['int'] else \
             (np.array(center) - self.origin)
 
-        coords = grid_filters.cell_coord0(self.cells,self.size,
+        coords = grid_filters.coordinates0_point(self.cells,self.size,
                                           -(0.5*(self.size + (self.size/self.cells
                                                               if np.array(center).dtype in np.sctypes['int'] else
                                                               0)) if periodic else c))
@@ -932,5 +932,5 @@ class Geom:
             base_nodes = np.argwhere(mask.flatten(order='F')).reshape(-1,1)
             connectivity.append(np.block([base_nodes + o[i][k] for k in range(4)]))
 
-        coords = grid_filters.node_coord0(self.cells,self.size,self.origin).reshape(-1,3,order='F')
+        coords = grid_filters.coordinates0_node(self.cells,self.size,self.origin).reshape(-1,3,order='F')
         return VTK.from_unstructured_grid(coords,np.vstack(connectivity),'QUAD')
diff --git a/python/damask/_result.py b/python/damask/_result.py
index 38b18d5ec..afeea568f 100644
--- a/python/damask/_result.py
+++ b/python/damask/_result.py
@@ -562,19 +562,19 @@ class Result:
             return dataset
 
     @property
-    def cell_coordinates(self):
+    def coordinates0_point(self):
         """Return initial coordinates of the cell centers."""
         if self.structured:
-            return grid_filters.cell_coord0(self.cells,self.size,self.origin).reshape(-1,3,order='F')
+            return grid_filters.coordinates0_point(self.cells,self.size,self.origin).reshape(-1,3,order='F')
         else:
             with h5py.File(self.fname,'r') as f:
                 return f['geometry/x_c'][()]
 
     @property
-    def node_coordinates(self):
+    def coordinates0_node(self):
         """Return initial coordinates of the cell centers."""
         if self.structured:
-            return grid_filters.node_coord0(self.cells,self.size,self.origin).reshape(-1,3,order='F')
+            return grid_filters.coordinates0_node(self.cells,self.size,self.origin).reshape(-1,3,order='F')
         else:
             with h5py.File(self.fname,'r') as f:
                 return f['geometry/x_n'][()]
@@ -1303,7 +1303,7 @@ class Result:
                                                    f['/geometry/T_c'].attrs['VTK_TYPE'] if h5py3 else \
                                                    f['/geometry/T_c'].attrs['VTK_TYPE'].decode())
         elif mode.lower()=='point':
-            v = VTK.from_poly_data(self.cell_coordinates)
+            v = VTK.from_poly_data(self.coordinates0_point)
 
         N_digits = int(np.floor(np.log10(max(1,int(self.increments[-1][3:])))))+1
 
diff --git a/python/damask/_rotation.py b/python/damask/_rotation.py
index 5fb8109c3..e7bf50bd1 100644
--- a/python/damask/_rotation.py
+++ b/python/damask/_rotation.py
@@ -763,7 +763,7 @@ class Rotation:
         def _dg(eu,deg):
             """Return infinitesimal Euler space volume of bin(s)."""
             phi_sorted = eu[np.lexsort((eu[:,0],eu[:,1],eu[:,2]))]
-            steps,size,_ = grid_filters.cell_coord0_gridSizeOrigin(phi_sorted)
+            steps,size,_ = grid_filters.cellSizeOrigin_coordinates0_point(phi_sorted)
             delta = np.radians(size/steps) if deg else size/steps
             return delta[0]*2.0*np.sin(delta[1]/2.0)*delta[2] / 8.0 / np.pi**2 * np.sin(np.radians(eu[:,1]) if deg else eu[:,1])
 
diff --git a/python/damask/grid_filters.py b/python/damask/grid_filters.py
index 7496a0d52..8e930d69d 100644
--- a/python/damask/grid_filters.py
+++ b/python/damask/grid_filters.py
@@ -22,11 +22,11 @@ def _ks(size,cells,first_order=False):
     Parameters
     ----------
     size : numpy.ndarray of shape (3)
-        physical size of the periodic field.
+        Physical size of the periodic field.
     cells : numpy.ndarray of shape (3)
-        number of cells.
+        Number of cells.
     first_order : bool, optional
-        correction for first order derivatives, defaults to False.
+        Correction for first order derivatives, defaults to False.
 
     """
     k_sk = _np.where(_np.arange(cells[0])>cells[0]//2,_np.arange(cells[0])-cells[0],_np.arange(cells[0]))/size[0]
@@ -47,9 +47,9 @@ def curl(size,field):
     Parameters
     ----------
     size : numpy.ndarray of shape (3)
-        physical size of the periodic field.
+        Physical size of the periodic field.
     field : numpy.ndarray of shape (:,:,:,3) or (:,:,:,3,3)
-        periodic field of which the curl is calculated.
+        Periodic field of which the curl is calculated.
 
     """
     n = _np.prod(field.shape[3:])
@@ -73,9 +73,9 @@ def divergence(size,field):
     Parameters
     ----------
     size : numpy.ndarray of shape (3)
-        physical size of the periodic field.
+        Physical size of the periodic field.
     field : numpy.ndarray of shape (:,:,:,3) or (:,:,:,3,3)
-        periodic field of which the divergence is calculated.
+        Periodic field of which the divergence is calculated.
 
     """
     n = _np.prod(field.shape[3:])
@@ -95,9 +95,9 @@ def gradient(size,field):
     Parameters
     ----------
     size : numpy.ndarray of shape (3)
-        physical size of the periodic field.
+        Physical size of the periodic field.
     field : numpy.ndarray of shape (:,:,:,1) or (:,:,:,3)
-        periodic field of which the gradient is calculated.
+        Periodic field of which the gradient is calculated.
 
     """
     n = _np.prod(field.shape[3:])
@@ -110,18 +110,18 @@ def gradient(size,field):
     return _np.fft.irfftn(grad_,axes=(0,1,2),s=field.shape[:3])
 
 
-def cell_coord0(cells,size,origin=_np.zeros(3)):
+def coordinates0_point(cells,size,origin=_np.zeros(3)):
     """
     Cell center positions (undeformed).
 
     Parameters
     ----------
     cells : numpy.ndarray of shape (3)
-        number of cells.
+        Number of cells.
     size : numpy.ndarray of shape (3)
-        physical size of the periodic field.
+        Physical size of the periodic field.
     origin : numpy.ndarray, optional
-        physical origin of the periodic field. Defaults to [0.0,0.0,0.0].
+        Physical origin of the periodic field. Defaults to [0.0,0.0,0.0].
 
     """
     start = origin        + size/cells*.5
@@ -133,16 +133,16 @@ def cell_coord0(cells,size,origin=_np.zeros(3)):
                      axis = -1)
 
 
-def cell_displacement_fluct(size,F):
+def displacement_fluct_point(size,F):
     """
     Cell center displacement field from fluctuation part of the deformation gradient field.
 
     Parameters
     ----------
     size : numpy.ndarray of shape (3)
-        physical size of the periodic field.
+        Physical size of the periodic field.
     F : numpy.ndarray
-        deformation gradient field.
+        Deformation gradient field.
 
     """
     integrator = 0.5j*size/_np.pi
@@ -160,67 +160,67 @@ def cell_displacement_fluct(size,F):
     return _np.fft.irfftn(displacement,axes=(0,1,2),s=F.shape[:3])
 
 
-def cell_displacement_avg(size,F):
+def displacement_avg_point(size,F):
     """
     Cell center displacement field from average part of the deformation gradient field.
 
     Parameters
     ----------
     size : numpy.ndarray of shape (3)
-        physical size of the periodic field.
+        Physical size of the periodic field.
     F : numpy.ndarray
-        deformation gradient field.
+        Deformation gradient field.
 
     """
     F_avg = _np.average(F,axis=(0,1,2))
-    return _np.einsum('ml,ijkl->ijkm',F_avg - _np.eye(3),cell_coord0(F.shape[:3],size))
+    return _np.einsum('ml,ijkl->ijkm',F_avg - _np.eye(3),coordinates0_point(F.shape[:3],size))
 
 
-def cell_displacement(size,F):
+def displacement_point(size,F):
     """
     Cell center displacement field from deformation gradient field.
 
     Parameters
     ----------
     size : numpy.ndarray of shape (3)
-        physical size of the periodic field.
+        Physical size of the periodic field.
     F : numpy.ndarray
-        deformation gradient field.
+        Deformation gradient field.
 
     """
-    return cell_displacement_avg(size,F) + cell_displacement_fluct(size,F)
+    return displacement_avg_point(size,F) + displacement_fluct_point(size,F)
 
 
-def cell_coord(size,F,origin=_np.zeros(3)):
+def coordinates_point(size,F,origin=_np.zeros(3)):
     """
     Cell center positions.
 
     Parameters
     ----------
     size : numpy.ndarray of shape (3)
-        physical size of the periodic field.
+        Physical size of the periodic field.
     F : numpy.ndarray
-        deformation gradient field.
+        Deformation gradient field.
     origin : numpy.ndarray of shape (3), optional
-        physical origin of the periodic field. Defaults to [0.0,0.0,0.0].
+        Physical origin of the periodic field. Defaults to [0.0,0.0,0.0].
 
     """
-    return cell_coord0(F.shape[:3],size,origin) + cell_displacement(size,F)
+    return coordinates0_point(F.shape[:3],size,origin) + displacement_point(size,F)
 
 
-def cell_coord0_gridSizeOrigin(coord0,ordered=True):
+def cellSizeOrigin_coordinates0_point(coordinates0,ordered=True):
     """
-    Return grid 'DNA', i.e. cells, size, and origin from 1D array of cell positions.
+    Return grid 'DNA', i.e. cells, size, and origin from 1D array of point positions.
 
     Parameters
     ----------
-    coord0 : numpy.ndarray of shape (:,3)
-        undeformed cell coordinates.
+    coordinates0 : numpy.ndarray of shape (:,3)
+        Undeformed cell coordinates.
     ordered : bool, optional
-        expect coord0 data to be ordered (x fast, z slow).
+        Expect coordinates0 data to be ordered (x fast, z slow).
 
     """
-    coords    = [_np.unique(coord0[:,i]) for i in range(3)]
+    coords    = [_np.unique(coordinates0[:,i]) for i in range(3)]
     mincorner = _np.array(list(map(min,coords)))
     maxcorner = _np.array(list(map(max,coords)))
     cells     = _np.array(list(map(len,coords)),'i')
@@ -232,8 +232,8 @@ def cell_coord0_gridSizeOrigin(coord0,ordered=True):
     size  [_np.where(cells==1)] = origin[_np.where(cells==1)]*2.
     origin[_np.where(cells==1)] = 0.0
 
-    if cells.prod() != len(coord0):
-        raise ValueError('Data count {len(coord0)} does not match cells {cells}.')
+    if cells.prod() != len(coordinates0):
+        raise ValueError('Data count {len(coordinates0)} does not match cells {cells}.')
 
     start = origin + delta*.5
     end   = origin - delta*.5 + size
@@ -244,37 +244,38 @@ def cell_coord0_gridSizeOrigin(coord0,ordered=True):
             _np.allclose(coords[2],_np.linspace(start[2],end[2],cells[2]),atol=atol)):
         raise ValueError('Regular cells spacing violated.')
 
-    if ordered and not _np.allclose(coord0.reshape(tuple(cells)+(3,),order='F'),cell_coord0(cells,size,origin),atol=atol):
+    if ordered and not _np.allclose(coordinates0.reshape(tuple(cells)+(3,),order='F'),
+                                    coordinates0_point(cells,size,origin),atol=atol):
         raise ValueError('Input data is not ordered (x fast, z slow).')
 
     return (cells,size,origin)
 
 
-def coord0_check(coord0):
+def coordinates0_check(coordinates0):
     """
     Check whether coordinates lie on a regular grid.
 
     Parameters
     ----------
-    coord0 : numpy.ndarray
-        array of undeformed cell coordinates.
+    coordinates0 : numpy.ndarray
+        Array of undeformed cell coordinates.
 
     """
-    cell_coord0_gridSizeOrigin(coord0,ordered=True)
+    cellSizeOrigin_coordinates0_point(coordinates0,ordered=True)
 
 
-def node_coord0(cells,size,origin=_np.zeros(3)):
+def coordinates0_node(cells,size,origin=_np.zeros(3)):
     """
     Nodal positions (undeformed).
 
     Parameters
     ----------
     cells : numpy.ndarray of shape (3)
-        number of cells.
+        Number of cells.
     size : numpy.ndarray of shape (3)
-        physical size of the periodic field.
+        Physical size of the periodic field.
     origin : numpy.ndarray of shape (3), optional
-        physical origin of the periodic field. Defaults to [0.0,0.0,0.0].
+        Physical origin of the periodic field. Defaults to [0.0,0.0,0.0].
 
     """
     return _np.stack(_np.meshgrid(_np.linspace(origin[0],size[0]+origin[0],cells[0]+1),
@@ -283,71 +284,71 @@ def node_coord0(cells,size,origin=_np.zeros(3)):
                      axis = -1)
 
 
-def node_displacement_fluct(size,F):
+def displacement_fluct_node(size,F):
     """
     Nodal displacement field from fluctuation part of the deformation gradient field.
 
     Parameters
     ----------
     size : numpy.ndarray of shape (3)
-        physical size of the periodic field.
+        Physical size of the periodic field.
     F : numpy.ndarray
-        deformation gradient field.
+        Deformation gradient field.
 
     """
-    return cell_2_node(cell_displacement_fluct(size,F))
+    return point_2_node(displacement_fluct_point(size,F))
 
 
-def node_displacement_avg(size,F):
+def displacement_avg_node(size,F):
     """
     Nodal displacement field from average part of the deformation gradient field.
 
     Parameters
     ----------
     size : numpy.ndarray of shape (3)
-        physical size of the periodic field.
+        Physical size of the periodic field.
     F : numpy.ndarray
-        deformation gradient field.
+        Deformation gradient field.
 
     """
     F_avg = _np.average(F,axis=(0,1,2))
-    return _np.einsum('ml,ijkl->ijkm',F_avg - _np.eye(3),node_coord0(F.shape[:3],size))
+    return _np.einsum('ml,ijkl->ijkm',F_avg - _np.eye(3),coordinates0_node(F.shape[:3],size))
 
 
-def node_displacement(size,F):
+def displacement_node(size,F):
     """
     Nodal displacement field from deformation gradient field.
 
     Parameters
     ----------
     size : numpy.ndarray of shape (3)
-        physical size of the periodic field.
+        Physical size of the periodic field.
     F : numpy.ndarray
-        deformation gradient field.
+        Deformation gradient field.
 
     """
-    return node_displacement_avg(size,F) + node_displacement_fluct(size,F)
+    return displacement_avg_node(size,F) + displacement_fluct_node(size,F)
 
 
-def node_coord(size,F,origin=_np.zeros(3)):
+def coordinates_node(size,F,origin=_np.zeros(3)):
     """
     Nodal positions.
 
     Parameters
     ----------
     size : numpy.ndarray of shape (3)
-        physical size of the periodic field.
+        Physical size of the periodic field.
     F : numpy.ndarray
-        deformation gradient field.
+        Deformation gradient field.
     origin : numpy.ndarray of shape (3), optional
-        physical origin of the periodic field. Defaults to [0.0,0.0,0.0].
+        Physical origin of the periodic field. Defaults to [0.0,0.0,0.0].
 
     """
-    return node_coord0(F.shape[:3],size,origin) + node_displacement(size,F)
+    return coordinates0_node(F.shape[:3],size,origin) + displacement_node(size,F)
 
 
-def cell_2_node(cell_data):
-    """Interpolate periodic cell data to nodal data."""
+def point_2_node(cell_data):
+    """Interpolate periodic point data to nodal data."""
     n = (  cell_data + _np.roll(cell_data,1,(0,1,2))
          + _np.roll(cell_data,1,(0,))  + _np.roll(cell_data,1,(1,))  + _np.roll(cell_data,1,(2,))
          + _np.roll(cell_data,1,(0,1)) + _np.roll(cell_data,1,(1,2)) + _np.roll(cell_data,1,(2,0)))*0.125
@@ -355,8 +356,8 @@ def cell_2_node(cell_data):
     return _np.pad(n,((0,1),(0,1),(0,1))+((0,0),)*len(cell_data.shape[3:]),mode='wrap')
 
 
-def node_2_cell(node_data):
-    """Interpolate periodic nodal data to cell data."""
+def node_2_point(node_data):
+    """Interpolate periodic nodal data to point data."""
     c = (  node_data + _np.roll(node_data,1,(0,1,2))
          + _np.roll(node_data,1,(0,))  + _np.roll(node_data,1,(1,))  + _np.roll(node_data,1,(2,))
          + _np.roll(node_data,1,(0,1)) + _np.roll(node_data,1,(1,2)) + _np.roll(node_data,1,(2,0)))*0.125
@@ -364,27 +365,27 @@ def node_2_cell(node_data):
     return c[1:,1:,1:]
 
 
-def node_coord0_gridSizeOrigin(coord0,ordered=True):
+def cellSizeOrigin_coordinates0_node(coordinates0,ordered=True):
     """
     Return grid 'DNA', i.e. cells, size, and origin from 1D array of nodal positions.
 
     Parameters
     ----------
-    coord0 : numpy.ndarray of shape (:,3)
-        undeformed nodal coordinates.
+    coordinates0 : numpy.ndarray of shape (:,3)
+        Undeformed nodal coordinates.
     ordered : bool, optional
-        expect coord0 data to be ordered (x fast, z slow).
+        Expect coordinates0 data to be ordered (x fast, z slow).
 
     """
-    coords    = [_np.unique(coord0[:,i]) for i in range(3)]
+    coords    = [_np.unique(coordinates0[:,i]) for i in range(3)]
     mincorner = _np.array(list(map(min,coords)))
     maxcorner = _np.array(list(map(max,coords)))
     cells     = _np.array(list(map(len,coords)),'i') - 1
     size      = maxcorner-mincorner
     origin    = mincorner
 
-    if (cells+1).prod() != len(coord0):
-        raise ValueError('Data count {len(coord0)} does not match cells {cells}.')
+    if (cells+1).prod() != len(coordinates0):
+        raise ValueError('Data count {len(coordinates0)} does not match cells {cells}.')
 
     atol = _np.max(size)*5e-2
     if not (_np.allclose(coords[0],_np.linspace(mincorner[0],maxcorner[0],cells[0]+1),atol=atol) and \
@@ -392,7 +393,8 @@ def node_coord0_gridSizeOrigin(coord0,ordered=True):
             _np.allclose(coords[2],_np.linspace(mincorner[2],maxcorner[2],cells[2]+1),atol=atol)):
         raise ValueError('Regular cells spacing violated.')
 
-    if ordered and not _np.allclose(coord0.reshape(tuple(cells+1)+(3,),order='F'),node_coord0(cells,size,origin),atol=atol):
+    if ordered and not _np.allclose(coordinates0.reshape(tuple(cells+1)+(3,),order='F'),
+                                    coordinates0_node(cells,size,origin),atol=atol):
         raise ValueError('Input data is not ordered (x fast, z slow).')
 
     return (cells,size,origin)
@@ -412,9 +414,9 @@ def regrid(size,F,cells_new):
         New cells for undeformed coordinates.
 
     """
-    c = cell_coord0(F.shape[:3],size) \
-      + cell_displacement_avg(size,F) \
-      + cell_displacement_fluct(size,F)
+    c = coordinates0_point(F.shape[:3],size) \
+      + displacement_avg_point(size,F) \
+      + displacement_fluct_point(size,F)
 
     outer = _np.dot(_np.average(F,axis=(0,1,2)),size)
     for d in range(3):
@@ -422,4 +424,4 @@ def regrid(size,F,cells_new):
         c[_np.where(c[:,:,:,d]>outer[d])] -= outer[d]
 
     tree = _spatial.cKDTree(c.reshape(-1,3),boxsize=outer)
-    return tree.query(cell_coord0(cells_new,outer))[1].flatten()
+    return tree.query(coordinates0_point(cells_new,outer))[1].flatten()
diff --git a/python/damask/seeds.py b/python/damask/seeds.py
index 90c1f58cc..d65cffd7f 100644
--- a/python/damask/seeds.py
+++ b/python/damask/seeds.py
@@ -29,7 +29,7 @@ def from_random(size,N_seeds,cells=None,rng_seed=None):
     if cells is None:
         coords = rng.random((N_seeds,3)) * size
     else:
-        grid_coords = grid_filters.cell_coord0(cells,size).reshape(-1,3,order='F')
+        grid_coords = grid_filters.coordinates0_point(cells,size).reshape(-1,3,order='F')
         coords = grid_coords[rng.choice(_np.prod(cells),N_seeds, replace=False)] \
                + _np.broadcast_to(size/cells,(N_seeds,3))*(rng.random((N_seeds,3))*.5-.25)          # wobble without leaving cells
 
@@ -98,7 +98,7 @@ def from_geom(geom,selection=None,invert=False,average=False,periodic=True):
     material = geom.material.reshape((-1,1),order='F')
     mask = _np.full(geom.cells.prod(),True,dtype=bool) if selection is None else \
            _np.isin(material,selection,invert=invert).flatten()
-    coords = grid_filters.cell_coord0(geom.cells,geom.size).reshape(-1,3,order='F')
+    coords = grid_filters.coordinates0_point(geom.cells,geom.size).reshape(-1,3,order='F')
 
     if not average:
         return (coords[mask],material[mask])
diff --git a/python/tests/test_Geom.py b/python/tests/test_Geom.py
index 891cd3937..670e1caf8 100644
--- a/python/tests/test_Geom.py
+++ b/python/tests/test_Geom.py
@@ -394,7 +394,7 @@ class TestGeom:
     def test_from_table(self):
         cells = np.random.randint(60,100,3)
         size = np.ones(3)+np.random.rand(3)
-        coords = grid_filters.cell_coord0(cells,size).reshape(-1,3,order='F')
+        coords = grid_filters.coordinates0_point(cells,size).reshape(-1,3,order='F')
         z=np.ones(cells.prod())
         z[cells[:2].prod()*int(cells[2]/2):]=0
         t = Table(np.column_stack((coords,z)),{'coords':3,'z':1})
@@ -407,7 +407,7 @@ class TestGeom:
         size = np.ones(3)+np.random.rand(3)
         s = seeds.from_random(size,np.random.randint(60,100))
         geom = Geom.from_Voronoi_tessellation(cells,size,s)
-        coords = grid_filters.cell_coord0(cells,size)
+        coords = grid_filters.coordinates0_point(cells,size)
         t = Table(np.column_stack((coords.reshape(-1,3,order='F'),geom.material.flatten(order='F'))),{'c':3,'m':1})
         assert geom_equal(geom.sort().renumber(),Geom.from_table(t,'c',['m']))
 
diff --git a/python/tests/test_Result.py b/python/tests/test_Result.py
index 8ebeff80a..417066fdf 100644
--- a/python/tests/test_Result.py
+++ b/python/tests/test_Result.py
@@ -356,11 +356,11 @@ class TestResult:
     @pytest.mark.parametrize('mode',['cell','node'])
     def test_coordinates(self,default,mode):
          if   mode == 'cell':
-             a = grid_filters.cell_coord0(default.cells,default.size,default.origin)
-             b = default.cell_coordinates.reshape(tuple(default.cells)+(3,),order='F')
+             a = grid_filters.coordinates0_point(default.cells,default.size,default.origin)
+             b = default.coordinates0_point.reshape(tuple(default.cells)+(3,),order='F')
          elif mode == 'node':
-             a = grid_filters.node_coord0(default.cells,default.size,default.origin)
-             b = default.node_coordinates.reshape(tuple(default.cells+1)+(3,),order='F')
+             a = grid_filters.coordinates0_node(default.cells,default.size,default.origin)
+             b = default.coordinates0_node.reshape(tuple(default.cells+1)+(3,),order='F')
          assert np.allclose(a,b)
 
     @pytest.mark.parametrize('output',['F',[],['F','P']])
diff --git a/python/tests/test_Rotation.py b/python/tests/test_Rotation.py
index a827b7a70..c60029046 100644
--- a/python/tests/test_Rotation.py
+++ b/python/tests/test_Rotation.py
@@ -1022,7 +1022,7 @@ class TestRotation:
         rng = tuple(zip(np.zeros(3),limits))
 
         weights = Table.load(ref_path/'ODF_experimental_cell.txt').get('intensity').flatten()
-        Eulers = grid_filters.cell_coord0(steps,limits)
+        Eulers = grid_filters.coordinates0_point(steps,limits)
         Eulers = np.radians(Eulers) if not degrees else Eulers
 
         Eulers_r = Rotation.from_ODF(weights,Eulers.reshape(-1,3,order='F'),N,degrees,fractions).as_Euler_angles(True)
@@ -1040,7 +1040,7 @@ class TestRotation:
         weights = Table.load(ref_path/'ODF_experimental.txt').get('intensity')
         weights = weights.reshape(steps+1,order='F')[:-1,:-1,:-1].reshape(-1,order='F')
 
-        Eulers = grid_filters.node_coord0(steps,limits)[:-1,:-1,:-1]
+        Eulers = grid_filters.coordinates0_node(steps,limits)[:-1,:-1,:-1]
         Eulers = np.radians(Eulers) if not degrees else Eulers
 
         Eulers_r = Rotation.from_ODF(weights,Eulers.reshape(-1,3,order='F'),N,degrees).as_Euler_angles(True)
diff --git a/python/tests/test_VTK.py b/python/tests/test_VTK.py
index 39dec373c..a3cba354f 100644
--- a/python/tests/test_VTK.py
+++ b/python/tests/test_VTK.py
@@ -155,8 +155,8 @@ class TestVTK:
         cells = np.array([5,6,7],int)
         size  = np.array([.6,1.,.5])
         rectilinearGrid = VTK.from_rectilinear_grid(cells,size)
-        c = grid_filters.cell_coord0(cells,size).reshape(-1,3,order='F')
-        n = grid_filters.node_coord0(cells,size).reshape(-1,3,order='F')
+        c = grid_filters.coordinates0_point(cells,size).reshape(-1,3,order='F')
+        n = grid_filters.coordinates0_node(cells,size).reshape(-1,3,order='F')
         rectilinearGrid.add(c,'cell')
         rectilinearGrid.add(n,'node')
         if update:
diff --git a/python/tests/test_grid_filters.py b/python/tests/test_grid_filters.py
index fa2bf2bb7..c48ab39d0 100644
--- a/python/tests/test_grid_filters.py
+++ b/python/tests/test_grid_filters.py
@@ -5,33 +5,33 @@ from damask import grid_filters
 
 class TestGridFilters:
 
-    def test_cell_coord0(self):
+    def test_coordinates0_point(self):
          size = np.random.random(3)
          cells = np.random.randint(8,32,(3))
-         coord = grid_filters.cell_coord0(cells,size)
+         coord = grid_filters.coordinates0_point(cells,size)
          assert np.allclose(coord[0,0,0],size/cells*.5) and coord.shape == tuple(cells) + (3,)
 
-    def test_node_coord0(self):
+    def test_coordinates0_node(self):
          size = np.random.random(3)
          cells = np.random.randint(8,32,(3))
-         coord = grid_filters.node_coord0(cells,size)
+         coord = grid_filters.coordinates0_node(cells,size)
          assert np.allclose(coord[-1,-1,-1],size) and coord.shape == tuple(cells+1) + (3,)
 
     def test_coord0(self):
          size = np.random.random(3)
          cells = np.random.randint(8,32,(3))
-         c = grid_filters.cell_coord0(cells+1,size+size/cells)
-         n = grid_filters.node_coord0(cells,size) + size/cells*.5
+         c = grid_filters.coordinates0_point(cells+1,size+size/cells)
+         n = grid_filters.coordinates0_node(cells,size) + size/cells*.5
          assert np.allclose(c,n)
 
-    @pytest.mark.parametrize('mode',['cell','node'])
+    @pytest.mark.parametrize('mode',['point','node'])
     def test_grid_DNA(self,mode):
-         """Ensure that xx_coord0_gridSizeOrigin is the inverse of xx_coord0."""
+         """Ensure that cellSizeOrigin_coordinates0_xx is the inverse of coordinates0_xx."""
          cells   = np.random.randint(8,32,(3))
          size   = np.random.random(3)
          origin = np.random.random(3)
-         coord0 = eval(f'grid_filters.{mode}_coord0(cells,size,origin)')                     # noqa
-         _cells,_size,_origin = eval(f'grid_filters.{mode}_coord0_gridSizeOrigin(coord0.reshape(-1,3,order="F"))')
+         coord0 = eval(f'grid_filters.coordinates0_{mode}(cells,size,origin)')                     # noqa
+         _cells,_size,_origin = eval(f'grid_filters.cellSizeOrigin_coordinates0_{mode}(coord0.reshape(-1,3,order="F"))')
          assert np.allclose(cells,_cells) and np.allclose(size,_size) and np.allclose(origin,_origin)
 
     def test_displacement_fluct_equivalence(self):
@@ -39,43 +39,43 @@ class TestGridFilters:
          size = np.random.random(3)
          cells = np.random.randint(8,32,(3))
          F    = np.random.random(tuple(cells)+(3,3))
-         assert np.allclose(grid_filters.node_displacement_fluct(size,F),
-                            grid_filters.cell_2_node(grid_filters.cell_displacement_fluct(size,F)))
+         assert np.allclose(grid_filters.displacement_fluct_node(size,F),
+                            grid_filters.point_2_node(grid_filters.displacement_fluct_point(size,F)))
 
     def test_interpolation_to_node(self):
          size = np.random.random(3)
          cells = np.random.randint(8,32,(3))
          F    = np.random.random(tuple(cells)+(3,3))
-         assert np.allclose(grid_filters.node_coord(size,F) [1:-1,1:-1,1:-1],
-                            grid_filters.cell_2_node(grid_filters.cell_coord(size,F))[1:-1,1:-1,1:-1])
+         assert np.allclose(grid_filters.coordinates_node(size,F) [1:-1,1:-1,1:-1],
+                            grid_filters.point_2_node(grid_filters.coordinates_point(size,F))[1:-1,1:-1,1:-1])
 
     def test_interpolation_to_cell(self):
          cells = np.random.randint(1,30,(3))
 
-         node_coord_x = np.linspace(0,np.pi*2,num=cells[0]+1)
-         node_field_x = np.cos(node_coord_x)
+         coordinates_node_x = np.linspace(0,np.pi*2,num=cells[0]+1)
+         node_field_x = np.cos(coordinates_node_x)
          node_field   = np.broadcast_to(node_field_x.reshape(-1,1,1),cells+1)
 
-         cell_coord_x = node_coord_x[:-1]+node_coord_x[1]*.5
-         cell_field_x = np.interp(cell_coord_x,node_coord_x,node_field_x,period=np.pi*2.)
+         coordinates0_point_x = coordinates_node_x[:-1]+coordinates_node_x[1]*.5
+         cell_field_x = np.interp(coordinates0_point_x,coordinates_node_x,node_field_x,period=np.pi*2.)
          cell_field   = np.broadcast_to(cell_field_x.reshape(-1,1,1),cells)
 
-         assert np.allclose(cell_field,grid_filters.node_2_cell(node_field))
+         assert np.allclose(cell_field,grid_filters.node_2_point(node_field))
 
-    @pytest.mark.parametrize('mode',['cell','node'])
-    def test_coord0_origin(self,mode):
+    @pytest.mark.parametrize('mode',['point','node'])
+    def test_coordinates0_origin(self,mode):
          origin= np.random.random(3)
          size  = np.random.random(3)                                                                # noqa
          cells  = np.random.randint(8,32,(3))
-         shifted   = eval(f'grid_filters.{mode}_coord0(cells,size,origin)')
-         unshifted = eval(f'grid_filters.{mode}_coord0(cells,size)')
+         shifted   = eval(f'grid_filters.coordinates0_{mode}(cells,size,origin)')
+         unshifted = eval(f'grid_filters.coordinates0_{mode}(cells,size)')
          if   mode == 'cell':
             assert  np.allclose(shifted,unshifted+np.broadcast_to(origin,tuple(cells)  +(3,)))
          elif mode == 'node':
             assert  np.allclose(shifted,unshifted+np.broadcast_to(origin,tuple(cells+1)+(3,)))
 
-    @pytest.mark.parametrize('function',[grid_filters.cell_displacement_avg,
-                                         grid_filters.node_displacement_avg])
+    @pytest.mark.parametrize('function',[grid_filters.displacement_avg_point,
+                                         grid_filters.displacement_avg_node])
     def test_displacement_avg_vanishes(self,function):
          """Ensure that random fluctuations in F do not result in average displacement."""
          size = np.random.random(3)
@@ -84,8 +84,8 @@ class TestGridFilters:
          F   += np.eye(3) - np.average(F,axis=(0,1,2))
          assert np.allclose(function(size,F),0.0)
 
-    @pytest.mark.parametrize('function',[grid_filters.cell_displacement_fluct,
-                                         grid_filters.node_displacement_fluct])
+    @pytest.mark.parametrize('function',[grid_filters.displacement_fluct_point,
+                                         grid_filters.displacement_fluct_node])
     def test_displacement_fluct_vanishes(self,function):
          """Ensure that constant F does not result in fluctuating displacement."""
          size = np.random.random(3)
@@ -93,16 +93,16 @@ class TestGridFilters:
          F    = np.broadcast_to(np.random.random((3,3)), tuple(cells)+(3,3))
          assert np.allclose(function(size,F),0.0)
 
-    @pytest.mark.parametrize('function',[grid_filters.coord0_check,
-                                         grid_filters.node_coord0_gridSizeOrigin,
-                                         grid_filters.cell_coord0_gridSizeOrigin])
+    @pytest.mark.parametrize('function',[grid_filters.coordinates0_check,
+                                         grid_filters.cellSizeOrigin_coordinates0_node,
+                                         grid_filters.cellSizeOrigin_coordinates0_point])
     def test_invalid_coordinates(self,function):
         invalid_coordinates = np.random.random((np.random.randint(12,52),3))
         with pytest.raises(ValueError):
             function(invalid_coordinates)
 
-    @pytest.mark.parametrize('function',[grid_filters.node_coord0_gridSizeOrigin,
-                                         grid_filters.cell_coord0_gridSizeOrigin])
+    @pytest.mark.parametrize('function',[grid_filters.cellSizeOrigin_coordinates0_node,
+                                         grid_filters.cellSizeOrigin_coordinates0_point])
     def test_uneven_spaced_coordinates(self,function):
         start = np.random.random(3)
         end   = np.random.random(3)*10. + start
@@ -116,13 +116,13 @@ class TestGridFilters:
 
 
     @pytest.mark.parametrize('mode',[True,False])
-    @pytest.mark.parametrize('function',[grid_filters.node_coord0_gridSizeOrigin,
-                                         grid_filters.cell_coord0_gridSizeOrigin])
+    @pytest.mark.parametrize('function',[grid_filters.cellSizeOrigin_coordinates0_node,
+                                         grid_filters.cellSizeOrigin_coordinates0_point])
     def test_unordered_coordinates(self,function,mode):
         origin = np.random.random(3)
         size   = np.random.random(3)*10.+origin
         cells  = np.random.randint(8,32,(3))
-        unordered = grid_filters.node_coord0(cells,size,origin).reshape(-1,3)
+        unordered = grid_filters.coordinates0_node(cells,size,origin).reshape(-1,3)
         if mode:
             with pytest.raises(ValueError):
                 function(unordered,mode)
@@ -192,7 +192,7 @@ class TestGridFilters:
         size = np.random.random(3)+1.0
         cells = np.random.randint(8,32,(3))
 
-        nodes = grid_filters.cell_coord0(cells,size)
+        nodes = grid_filters.coordinates0_point(cells,size)
         my_locals = locals()                                                                        # needed for list comprehension
 
         field = np.stack([np.broadcast_to(eval(f,globals(),my_locals),cells) for f in field_def],axis=-1)
@@ -252,7 +252,7 @@ class TestGridFilters:
         size = np.random.random(3)+1.0
         cells = np.random.randint(8,32,(3))
 
-        nodes = grid_filters.cell_coord0(cells,size)
+        nodes = grid_filters.coordinates0_point(cells,size)
         my_locals = locals()                                                                        # needed for list comprehension
 
         field = np.stack([np.broadcast_to(eval(f,globals(),my_locals),cells) for f in field_def],axis=-1)
@@ -305,7 +305,7 @@ class TestGridFilters:
         size = np.random.random(3)+1.0
         cells = np.random.randint(8,32,(3))
 
-        nodes = grid_filters.cell_coord0(cells,size)
+        nodes = grid_filters.coordinates0_point(cells,size)
         my_locals = locals()                                                                        # needed for list comprehension
 
         field = np.stack([np.broadcast_to(eval(f,globals(),my_locals),cells) for f in field_def],axis=-1)
diff --git a/python/tests/test_seeds.py b/python/tests/test_seeds.py
index f7c46e889..65624b51f 100644
--- a/python/tests/test_seeds.py
+++ b/python/tests/test_seeds.py
@@ -41,7 +41,7 @@ class TestSeeds:
     def test_from_geom_grid(self,periodic,average):
         cells = np.random.randint(10,20,3)
         size  = np.ones(3) + np.random.random(3)
-        coords = grid_filters.cell_coord0(cells,size).reshape(-1,3)
+        coords = grid_filters.coordinates0_point(cells,size).reshape(-1,3)
         np.random.shuffle(coords)
         geom_1 = Geom.from_Voronoi_tessellation(cells,size,coords)
         coords,material = seeds.from_geom(geom_1,average=average,periodic=periodic)