Merge Layouts
This example demonstrates how to copy cell trees from one layout to another. It takes three layouts - each with a single top cell - and arranges their top cells vertically from bottom to top.
It employs the copy_tree method of the Cell class. See the Original documentation
for details.
Note: this example uses _destroy to free resources once they are no longer
required.
Code:
import klayout.db as db
import math
ly = db.Layout()
top_cell = ly.create_cell("TOP")
spacing = 1.0
y = 0.0
for file in [ "A.gds", "B.gds", "C.gds" ]:
ly_import = db.Layout()
ly_import.read(file)
imported_top_cell = ly_import.top_cell()
target_cell = ly.create_cell(imported_top_cell.name)
target_cell.copy_tree(imported_top_cell)
# frees the resources of the imported layout
ly_import._destroy()
inst = db.DCellInstArray(target_cell.cell_index(), db.DTrans(db.DVector(0, y)))
top_cell.insert(inst)
y += target_cell.dbbox().height() + spacing
ly.write("layout_merge.gds")
Inputs (A.gds, B.gds and C.gds):
Result:
Result (top level hierarchy only):
