Abutment of two cells

[Rishabhgoyal07]

I am using gdstk.Reference() function to abut two cells side by side, and saving them into a cell, then adding the cell into a library, then finally saving the library as gds file, but it is not giving the abutted two cells as the output, infact it is showing nothing when viewed in klayout.

[heitzmann]

Can you share your script? Note that gdstk does not add dependencies by default when adding a cell to a library, you have to manually add all your cells or do something like:

library.add(main_cell, *main_cell.dependencies())

[Rishabhgoyal07]

import gdstk

defining a function to abut two cells

def abutment(file1,file2):

loading the gds file into a library

lib1 = gdstk.read_gds(file1)
lib2 = gdstk.read_gds(file2)

to know the information about the gds file

info1 = gdstk.gds_info(file1)
print(info1)

extracting the cells from the library

inst1 = lib1.cells[0]
inst2 = lib2.cells[0]

creating new library to hold the abutted cell

lib3 = gdstk.Library()
# lib3.add(inst1)
# lib3.add(inst2)

creating a reference of cell(instance)1

ref = gdstk.Reference(inst1)
ref1 = gdstk.Reference(inst2,(5,5))

creating a cell two hold the abutted cells

inst3 = lib3.new_cell("inst3")

adding the referecne of cell1 in cell3

inst3.add(ref)
inst3.add(ref1)

Writing the library to a gds file

lib3.write_gds("output.gds")

Calling the function to abut the cells

abutment("inverter1.gds","inverter.gds")

This is my script, it is executing successfully but in the output it is showing nothing in the klayout, while I want to see the two cells which I referenced and added to inst3.