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find all cells with external power source (through heirarchy)

iDoLayout

Ultimately, I would like to draw a highlight around the prBoundary of each cell connected to...let's say vdd & vddr.

I have a way to do so if the cell is at the current level using transform and if(R0,MX, etc) using transform trickery.  

However, diving down to the next level is something different.  What I have in mind is to keep using transform as I dive down, but that gets hairy.  Is there a better way?

  • It's not that complicated - and I don't think it needs conditional statements to handle the transformations (the "transform trickery"). Most likely you just need to use dbTransformPoint or dbTransformBBox and use the ~>transform on the instances to find that information. Then traverse the hierarchy and concatenate the transforms using dbConcatTransform as you do so. Here's an example in an earlier post which shows doing this kind of recursive traversal and transformation concatenation.

    Andrew 

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