Suggestion for new format for the desc data.

Author: fbeutel

gdshelpers/geometry/chip.py

@@ -202,9 +202,29 @@ def get_dlw_data(self):
         return dlw_data
 
     def get_desc(self):
-        desc = self.desc.copy()
-        desc['cells'] = {cell['cell'].name: dict(offset=tuple(cell['origin']), angle=cell['angle'] or 0,
-                                                 **cell['cell'].get_desc()) for cell in self.cells}
+        """
+        Creates and returns a dictionary containing all the 'desc' data of this cell and all children.
+        The returned dictionary contains two keys:
+
+        * `root`: The name of the root cell (the cell from which `get_desc` was called)
+        * `cells`: Dictionary mapping cell names to the desc data of each cell as well as cell references to other cells
+                   (with origin and angle).
+
+        :return: Dictionary containing the `desc` data for this cell and all cells referenced by this cell
+        """
+        def walk_cells(cell, out_dict):
+            if cell.name not in out_dict:
+                out_dict[cell.name] = {
+                    'cells': {child['cell'].name: dict(offset=tuple(child['origin']),
+                                                       angle=child['angle'] or 0) for child in cell.cells},
+                    **cell.desc
+                }
+
+                for child in cell.cells:
+                    walk_cells(child['cell'], out_dict)
+
+        desc = dict(root=self.name, cells=dict())
+        walk_cells(self, desc['cells'])
         return desc
 
     def get_fractured_layer_dict(self, max_points=4000, max_line_points=4000):