DRC: Remove identical polygons

Comments

• Matthias

  August 2019

  Hi Xaveer,

  but delivering the overlap between two shapes even if they are identical is a part of the feature. So suppressing overlap just in that case seems like an arbitrary restriction to me.

  If you look for "layout normalization": removing duplicate shapes is a side effect of OASIS saving (with compression). Maybe this helps.

  Regards,

  Matthias
• Xaveer

  August 2019

  Hi Matthias,

  Indeed, I understand that this will limit the function of the overlap check, but for now that would still be preferred.
  How to specify compression on the OASIS saving? I now use target() in the DRC runset, but it is not clear to me how to pass any options.

  Thanks,
  Xaveer
• Xaveer

  August 2019

  Hi Matthias,

  Compression is the default, so it works without other options.

  Thanks a lot!
  Xaveer
• Matthias

  August 2019

  Yes exactly, compression is the default :-)

  You can switch it off by setting the compression level to 0. But unless there is a specific reason you wouldn't do that.

  Matthias
• Xaveer

  August 2019

  Although not needed now, how should I set the compression level?

  Thanks,
  Xaveer
• Matthias

  August 2019

  It's set in the "Writer Options" and is called "compaction level" there (sorry, naming consistency isn't my strength …). 0 is "no compression", 1 … enable compression with a increasingly deeper search for repetitions. On level 1 upwards, redundant shapes are removed as they comprise a kind of "null repetition".

  Matthias