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The XOR works well in klayout, is there a way to run a XNOR/NXOR operation within klayout? Basically the aim would be to keep only polygons that don't have overlap.

Thanks,

## Comments

I'm afraid, I don't understand ... that is exactly what XOR does: it leaves the parts of polygons which do not overlap.

Do you mean the inverse of XOR that is not available?

Background is that all boolean operations produce local results - they will not generate output outside the drawing area - that would create a logical dilemma as this area is not bounded.

So in the truth table, the row with A=0 and B=0 will always produce "0". Hence all available operations are these:

Apart from the trivial ZERO, "=A" and "=B", all operations are supported in DRC.

If you need "inversion" you can basically subtract ("NOT") from a huge rectangle, but technically you should avoid that as it will generate huge polygons with many holes.

Matthias

Hi @Matthias ,

I used strmxor.exe to compare to input GDS(

command: strmxor.exe input1.gds input2.gds output.gds), I got output GDS that contains what is different between them. If do we have any way to write to output what is same between them?Thank you,

dai

Never mind, @Matthias.

I found the way : A xor B = C and then ( A + B ) xor C = D. D will be contains what is same between A and B

Thank you,

dai

Hi @dai,

I think this is just a complicated way to do an AND

strmxor can't do AND right now. Maybe I should include that too. But a more general way is to run a DRC script for that purpose.

Matthias

Thank you for your suggestion , @Matthias.

I will follow that way.

dai