reduce duplication

Author: mscroggs

symfem/functionals.py

@@ -79,16 +79,15 @@ def entity_definition(self):
             desc += ['vertex', 'edge', 'face', 'volume'][self.entity[0]]
             return desc
 
+    def dof_direction(self):
+        """Get the direction of the DOF."""
+        return None
+
     @abstractmethod
     def dof_point(self):
         """Get the location of the DOF in the cell."""
         pass
 
-    @abstractmethod
-    def dof_direction(self):
-        """Get the direction of the DOF."""
-        pass
-
     @abstractmethod
     def eval(self, fun, symbolic=True):
         """Apply to the functional to a function."""
@@ -196,10 +195,6 @@ def dof_point(self):
         """Get the location of the DOF in the cell."""
         return self.point
 
-    def dof_direction(self):
-        """Get the direction of the DOF."""
-        return None
-
     def perform_mapping(self, fs, map, inverse_map, tdim):
         """Map functions to a cell."""
         if self.mapping is not None:
@@ -316,10 +311,6 @@ def dof_point(self):
         """Get the location of the DOF in the cell."""
         return self.point
 
-    def dof_direction(self):
-        """Get the direction of the DOF."""
-        return None
-
     def get_tex(self):
         """Get a representation of the functional as TeX, and list of terms involved."""
         desc = "v\\mapsto"
@@ -446,10 +437,6 @@ def dof_point(self):
         """Get the location of the DOF in the cell."""
         return tuple(sympy.Rational(sum(i), len(i)) for i in zip(*self.integral_domain.vertices))
 
-    def dof_direction(self):
-        """Get the direction of the DOF."""
-        return None
-
     def eval(self, function, symbolic=True):
         """Apply the functional to a function."""
         point = [i for i in self.integral_domain.origin]
@@ -502,10 +489,6 @@ def dof_point(self):
         """Get the location of the DOF in the cell."""
         return tuple(sympy.Rational(sum(i), len(i)) for i in zip(*self.integral_domain.vertices))
 
-    def dof_direction(self):
-        """Get the direction of the DOF."""
-        return None
-
     def eval(self, function, symbolic=True):
         """Apply the functional to a function."""
         point = [i for i in self.integral_domain.origin]
@@ -552,10 +535,6 @@ def dof_point(self):
         """Get the location of the DOF in the cell."""
         return tuple(sympy.Rational(sum(i), len(i)) for i in zip(*self.integral_domain.vertices))
 
-    def dof_direction(self):
-        """Get the direction of the DOF."""
-        return None
-
     def eval(self, function, symbolic=True):
         """Apply the functional to a function."""
         for dir, o in zip(self.directions, self.orders):