How to get coordinates in one meta layer's polygon ??

[ethanVodka]

Hi !

I'm analyzing gds2 in my school, Try to get one meta layer data, but I alway get all hole cell's data.

I hope you give me advice or sample code.

Best regards

import gdspy import tripy import pandas as pd from plotnine import ggplot, aes, geom_polygon, geom_segment, geom_point

lib = gdspy.GdsLibrary(infile='test.gds')

###########################################################3 def convert_all(d2_array): ret_array = [] for i in range(0, len(d2_array)): for j in range(0, len(d2_array[i])): ret_array.append(tuple(d2_array[i][j]))

return ret_array

def convert_devide(d2_array): ret_array = [] for i in range(0, len(d2_array)): ret_array2 = [] for j in range(0, len(d2_array[i])): ret_array2.append(tuple(d2_array[i][j]))

    ret_array.append(ret_array2)

return ret_array

def make_frame_from_triangles(triangles): x_start = [] x_end = [] y_start = [] y_end = [] for triangle in triangles: for i, pt in enumerate(triangle): next_index = (i + 1) % 3 x_start.append(pt[0]) x_end.append(triangle[next_index][0]) y_start.append(pt[1]) y_end.append(triangle[next_index][1]) df = pd.DataFrame({'x': x_start, 'y': y_start, 'xend': x_end, 'yend': y_end}) return df ########################################################################################

cells_polygons = [] cells_polygons.append(convert_devide(lib.cells['FlexPath1'].get_polygons()))

triangles = [] for j in range(0, len(cells_polygons)): for i in range(0, len(cells_polygons[j])): triangles.append(tripy.earclip(cells_polygons[j][i]))

all_tri = [] all_tri = convert_all(triangles)

df = make_frame_from_triangles(all_tri) print((ggplot(df, aes(x='x', y='y')) + geom_segment(aes(x='x', y='y', xend='xend', yend='yend'))))

[heitzmann]

@etha-gh You should be able to get the polygons in a single layer/datatype with Cell.get_polygons, for example:

layer = 3
datatype = 4
polygon_list = cell.get_polygons((layer, datatype))

[ethanVodka]

Thank you so much! I try to do it.

[ethanVodka]

Thank you reply! I try to run sample you give me, but it says nothing.

if there are wrong? I'm so sorry take your time for me.

import gdspy

lib = gdspy.GdsLibrary(infile='test.gds') cell = gdspy.Cell('test.gds')

layer = 3 datatype = 4 polygon_list = cell.get_polygons((layer, datatype))

print(polygon_list)

[heitzmann]

You have to load a cell from your library. This line:

cell = gdspy.Cell('test.gds')

creates an empty cell with the name 'test.gds'

[ethanVodka]

So sorry, I'm new come. just started few weeks ago.

I'm really really sorry.

`import gdspy

lib = gdspy.GdsLibrary(infile='test.gds')

layer = 12 datatype = 4 polygon_list = cell.get_polygons((layer, datatype))

print(polygon_list)`

It says 'cell' is not defined, how do I can defined cell?

[heitzmann]

@etha-gh I looks to me that you should be first going through a few Python tutorials to learn the language, if it is new to you. Then, you have to read through gdspy's documentation, because you seem to be guessing what to do.

Meanwhile, you probably need to do something like this ('cell_name' is the name of the cell you want to extract from the GDSII file):

import gdspy

lib = gdspy.GdsLibrary(infile='test.gds')

cell = lib.cells['cell_name']

layer = 12
datatype = 4
polygon_list = cell.get_polygons((layer, datatype))

print(polygon_list)

# Coordinates from first polygon in the list
print(polygon_list[0])

[ethanVodka]

test_gds.py.zip

Thanks for your advice. I'm study about GDSII files. and make one meta layer's graphic. here is my all code I sent to you in zip file.

If you find something wrong, I hope you tell me.

So thank you give me advice and lecture. I will read your Document and keep to study.

Best Regards