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pcell shapes filtering

RAGHU2634

Hi ,

I started with skill learning

instID~>master~>shapes~>?? gives list of all layers used in p-cell. Now I want to have access to only poly and diffusion layers to read their bBOX.  Is there a way to do this ?

Thanks,

Surya

  • Hi Surya,

    You can filter lists using arbitrary criteria with the setof function, e.g. to filter to just get the shapes on the Poly layer:

    polyList = setof(shape instID~>master~>shapes shape~>layerName=="Poly")

    Then from the returned list (could be nil if the shape doesn't exist or if you have the filter incorrectly specified) you can get the bounding box(es) of the shape(s) (i.e. polyList~>bBox). Repeat as needed for other layers etc.  As before you will need to transform the shapes to the instances' coordinate system. Also, be aware that PCells have a 'master' (submaster) for an instance and a supermaster (the PCell master) - in this case I think you want the instances master (what you have) which is a PCell submaster - a particular variant with a specific set of parameters; multiple instances with the same parameters will point to the same submaster, a new submaster is created for each new set of parameters).

    This should get you started.

    Best regards,

    Lawrence.

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