Merge branch '387-rotation-clash-when-last-dimension-is-three' into 'development'

prevent rightmost dimension of object from blending with rotation array

Closes #387

See merge request damask/DAMASK!915

Author: MarDiehl

python/damask/_rotation.py

@@ -442,7 +442,7 @@ def __matmul__(self,
 
         """
         if isinstance(other, np.ndarray):
-            obs = util.shapeblender(self.shape,other.shape)[len(self.shape):]
+            obs = (util.shapeblender(self.shape,other.shape[:-1])+other.shape[-1:])[len(self.shape):]
             for l in [4,2,1]:
                 if obs[-l:] == l*(3,):
                     bs = util.shapeblender(self.shape,other.shape[:-l],False)

python/tests/test_Rotation.py

@@ -990,6 +990,7 @@ def test_broadcastcomposition(self,shape):
                                                  (Rotation.from_axis_angle,        np.array([1,0,0,4])),
                                                  (Rotation.from_axis_angle,        np.array([1,1,0,1])),
                                                  (Rotation.from_matrix,            np.random.rand(3,3)),
+                                                 (Rotation.from_matrix,            np.array([[2,0,0],[0,2,0],[0,1,0]])),
                                                  (Rotation.from_matrix,            np.array([[1,1,0],[1,2,0],[0,0,1]])),
                                                  (Rotation.from_Rodrigues_vector,  np.array([1,0,0,-1])),
                                                  (Rotation.from_Rodrigues_vector,  np.array([1,1,0,1])),
@@ -1128,10 +1129,13 @@ def test_invariant(self):
         R = Rotation.from_random()
         assert (R/R).isclose(R*R**(-1)) and (R/R).isclose(Rotation())
 
-    @pytest.mark.parametrize('item',[np.ones(3),np.ones((3,3)), np.ones((3,3,3,3))])
-    def test_apply(self,item):
-        r = Rotation.from_random()
-        assert (r.apply(item) == r@item).all()
+    @pytest.mark.parametrize('shape',[None,2,(2,3),(2,2),(2,3,3,3)])
+    @pytest.mark.parametrize('item',[np.random.rand(3),np.random.rand(3,3), np.random.rand(3,3,3,3)])
+    def test_apply(self,item,shape):
+        r = Rotation.from_random(shape)
+        i = r*~r
+        applied = i.apply(item)
+        assert np.allclose(np.broadcast_to(item,applied.shape),applied)
 
     @pytest.mark.parametrize('angle',[10,20,30,40,50,60,70,80,90,100,120])
     def test_average(self,angle):