| # Non-rectilinear core area |
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| Tool: Initialize Floorplan |
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| Subcategory: Floorplan customization |
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| ## Conversation |
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| ### Blebowski |
| Hello,
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| is it possible to somehow specify core-area that is non-rectilinear (e.g. as a group of polygons surrounding concave shape) ?
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| I understand that if doing "digital on top" FP where all the analog is a digital macro, this does not make sense. However, it may be usefull in case where "analog-on-top" is done, and digital may have some weird shape and is eventually placed as hard GDSII macro into analog-on-top design.
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| ### maliberty |
| The simplest would be to make a rectangular block and add placement and routing blockages for the disallowed area |
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| ### Blebowski |
| Thanks. Can I then do the `add_pdn_ring` around just the cut area (e.g. L-shape pdn-ring) ? Or is there some other trick how
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| to achieve this ? |
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