Get annotation locations from GDS

[Edgars]

Hello,

I am having trouble extracting the annotation location from a gds file I load. I currently have a device dictionary (Device_dictionary) which holds all cellnames (keys) in the gds. Then I load the cell based on cellname and can get the annotation location, however, the annotations are then in the cell coordinates. Is there a way to load all annotations in gds file and get their coordinates?

import nazca as nd
for key in Device_dictionary:
    device = nd.load_gds(filename='my_file.gds', cellname=key)
    for ii in range(len(device.annotations)):
        print(device.annotations[ii][0].x) # print x coordinate of annotation
        print(device.annotations[ii][0].y) # print x coordinate of annotation

Bests,
Edgars

[Xaveer]

Dear Edgars,

I think the following should do what you want, or, at least, point you in the right direction.

import nazca as nd
gds = nd.load_gds(filename='my_file.gds', topcellsonly=False, asdict=False)
for params in nd.cell_iter(gds, revisit=True):
  if params.cell_start:
    name = params.cell.cell_name
      for name not in Device_dictionary:
        continue
      # get cell's translation (pointer) and flip w.r.t. cell_top
      pointer, flip = params.transflip_glob
      for annot, xy in params.iters['annotation']:
        if flip:
          p = nd.Pointer(xy[0], -xy[1])
        else:
          p = nd.Pointer(*xy)
        # add pin position in the cell to the cell translation.
        print(name, pointer.copy().move_ptr(p).xya())

Xaveer

• This reply was modified 7 months, 4 weeks ago by Xaveer.
• This reply was modified 7 months, 4 weeks ago by Katarzyna.
• This reply was modified 7 months, 4 weeks ago by Katarzyna.

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