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Creating a new layout to view after a region has been created.
I am new to the KLayout API. I am creating a region in Python by taking the XOR of two regions. Once I have the new region, I would like to export it to a new layout using layout.write() so I can see my changes.
****Note: I would like to attach a GDS file that I am using for this. But it does not seem like I have the ability to. Could someone be kind enough to help me here so this question can be answered easily. Thanks!
# Here is my current script:
import pya
import os
import sys
def get_layer_name(lyr):
layerMap = {
13: 'ex1',
15: 'ex2',
}
try:
return True, layerMap[int(lyr)]
except:
return False, ''
def get_layer_index(layout, input_name):
layer_idx = []
for layer_index in range(layout.layers()):
# Get layer info
layer_info = layout.get_info(layer_index)
layer_info_str = str(layer_info)
# Only consider layers that are on the base level
if layer_info_str[-1] != '0':
continue
# Determine the layer name
found_flag, layer_name = get_layer_name(layer_info_str[:-2])
if not found_flag:
continue
# If the layer name matches the desired name, return its index for
# layout.begin_shapes(cell,index)
if layer_name == input_name:
layer_values = [int(x) for x in layer_info_str.split("/")]
layer_idx = layout.find_layer(layer_values[0], layer_values[1])
break
return layer_idx
def main(pwd,device_name):
gds_files = filter(lambda f: f.endswith( '.gds' ), os.listdir(pwd))
layout = pya.Layout()
layout_debugger = pya.Layout()
# Loop each GDS file
for gds in gds_files:
print ( "\nfilename : ", gds )
# get main window object and load layout file
layout.read(pwd + '\\' + gds)
# Determine layer indices
ex1 = get_layer_index(layout, 'ex1')
ex2 = get_layer_index(layout, 'ex2')
# Only look at MOSFET cells
cells = layout.cells('*'+device_name+'*')
if bool(cells):
for cell in cells:
region_1 = pya.Region.new(cell.begin_shapes_rec(ex1))
region_2 = pya.Region.new(cell.begin_shapes_rec(ex2))
region = region_1 ^ region_2
# Here is where I would need to add something to layout_debugger
new_device = layout_debugger.[something_should_go_here]()
layout_debugger.write("ex.gds")
if __name__=='__main__':
pwd = r'C:\Users\smanz\Documents\KLayout Learning'
device_name = '32MOHM_MESHFET'
main(pwd,device_name)
***** I am aware that I would be overwriting progress upon each loop. I am hoping to have some sort of visual of my results at any given time along the script and I am currently not aware of any other way to do this. Thank you ahead of time!
Comments
You can attach GDS files if you pack them into a .zip container.
Are you sure XOR between two single layers is enough? If so, this is the code I'd put into the loop (disclaimer: not tested):
Matthias
@Matthias
Awesome. This is exactly what I ended up doing. Thank you very much..
As an aside but from a similar vein, let's say I have a numpy array that can be considered to be a set of coordinate pairs, is there a way to create a region for this and plot out into a gds file in the same way?
Best,
Steven
Yes, you can generate a polygon from an array of points
(I guess that also works with numpy arrays)
Note that the coordinates need to be given in integers (multiples of the layout's database unit, 1nm by default). You can feed a region with multiple polygons using "Region.insert" or directly insert the polygons into the Cell's shapes container like you do with the regions.
Matthias