node_wrangler/operators.py

@@ -2359,49 +2359,57 @@ class NWAlignNodes(Operator, NWBase):
 
             # Check if nodes should be laid out horizontally or vertically
             # use dimension to get center of node, not corner
-            x_locs = [n.location.x + (n.dimensions.x / 2) for n in selection]
-            y_locs = [n.location.y - (n.dimensions.y / 2) for n in selection]
+            x_locs = [n.location.x + (0.5 * n.dimensions.x) for n in selection]
+            y_locs = [n.location.y - (0.5 * n.dimensions.y) for n in selection]
             x_range = max(x_locs) - min(x_locs)
             y_range = max(y_locs) - min(y_locs)
-            mid_x = (max(x_locs) + min(x_locs)) / 2
-            mid_y = (max(y_locs) + min(y_locs)) / 2
+            mid_x = 0.5 * (max(x_locs) + min(x_locs))
+            mid_y = 0.5 * (max(y_locs) + min(y_locs))
             horizontal = x_range > y_range
 
             # Sort selection by location of node mid-point
             if horizontal:
-                selection = sorted(selection, key=lambda n: n.location.x + (n.dimensions.x / 2))
+                selection.sort(key=lambda n: n.location.x + (n.dimensions.x / 2))
             else:
-                selection = sorted(selection, key=lambda n: n.location.y - (n.dimensions.y / 2), reverse=True)
+                selection.sort(key=lambda n: n.location.y - (n.dimensions.y / 2), reverse=True)
 
             # Alignment
             current_pos = 0
-            for node in selection:
-                current_margin = margin
-                current_margin = current_margin * 0.5 if node.hide else current_margin  # use a smaller margin for hidden nodes
-
             if horizontal:
+                for node in selection:
+                    current_margin = (0.5 * margin) if node.hide else margin
+
                     node.location.x = current_pos
+                    node.location.y = mid_y + (0.5 * node.dimensions.y)
                     current_pos += current_margin + node.dimensions.x
-                    node.location.y = mid_y + (node.dimensions.y / 2)
             else:
+                for node in selection:
+                    current_margin = (0.5 * margin) if node.hide else margin
+
                     node.location.y = current_pos
+                    node.location.x = mid_x - (0.5 * node.dimensions.x)
                     current_pos -= (current_margin * 0.3) + node.dimensions.y  # use half-margin for vertical alignment
-                    node.location.x = mid_x - (node.dimensions.x / 2)
 
             # If active node is selected, center nodes around it
             if active_loc is not None:
                 active_loc_diff = active_loc - active_node.location
                 for node in selection:
                     node.location += active_loc_diff
-            else:  # Position nodes centered around where they used to be
-                locs = ([n.location.x + (n.dimensions.x / 2) for n in selection]
-                        ) if horizontal else ([n.location.y - (n.dimensions.y / 2) for n in selection])
-                new_mid = (max(locs) + min(locs)) / 2
+
+            elif horizontal:  # Position nodes centered around where they used to be
+                new_locs = [n.location.x + (0.5 * n.dimensions.x) for n in selection]
+                new_mid = 0.5 * (max(new_locs) + min(new_locs))
+                x_diff = mid_x - new_mid
+
                 for node in selection:
-                    if horizontal:
-                        node.location.x += (mid_x - new_mid)
+                    node.location.x += x_diff
             else:
-                        node.location.y += (mid_y - new_mid)
+                new_locs = [n.location.y - (0.5 * n.dimensions.y) for n in selection]
+                new_mid = 0.5 * (max(new_locs) + min(new_locs))
+                y_diff = mid_y - new_mid
+
+                for node in selection:
+                    node.location.y += y_diff
 
         return {'FINISHED'}