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Is there a version of CCShiHierLayerOps.il that does not require a scratch cell

Michael L

I have a skill program called "CCShiHierLayerOps.il", that permits hierarchical layer generation.  The skill code I have creates a scratch cell copy of the layout, flattens all sub cells, do the layer generation, then copies the result back to the original cell. 

My question is, is there a different version of this program that doesn't use the scratch cell?  Using this program oh higher levels of hierarchy, the flattening takes quite a while...

  • I don't know the code but usually when I use hierarchical layer operations, I find the shapes of concern using dbGetTrueOverlaps and then copy them into a scratch cell transforming them into the top level. This is much faster than flattening the cells. I don't have to carry all the other shapes that do not matter.

    You could also use the point array functions but they are limited and you have manage a large number of lists of points.

    The db layer operations create new shapes so you either have to create them in a scratch cell or clean up the stuff you don't want in your cell.

    Ted

  • There are also the rteGeom functions (e.g. rteGeomAnd, rteGeomAndNot etc) which work hierarchically. These do require a Virtuoso Layout Suite GXL license to use them though.

    I've also used a similar approach to Ted - see as an example of this.

    Regards,

    Andrew.

  • When did the rte geometry commands come in? I missed that. Of course, I can't use them in pcells because of the license issue.

    Ted

  • Ted,

    They're been there for many years now - they come from the VSR integration, so they've been there as long as that's been there (maybe IC611, I can't quite remember). Certainly IC612, because I filed a CCR on one of them back in 2008.

    As you say, they're not suitable for use in pcells though, not only for license reasons, but because they're not guaranteed to be available in ITK DB applications or in the stream interface.

    Regards,

    Andrew.

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