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extract connectivity using skill

posh

Hi all,

I am a new Skill User, iam trying to write a code for extracting a net from one cellview and put it into a different cellview (only the extracted net). i have read some previous threads but most of them were pointed to VXL. i do not have a VXL licence. so can anyone hint me how to extract a net using skill in VLE.

 

thanks

Harish Poshala 

 

Parents

  •  Hi Harish,

    I will add to what Derek and Andrew have said by providing an outline of how I would approach this in SKILL code:

    1. Get a starting point (xy provided perhaps by enterPoint() or
      enterPoints()) or starting shape from the user
    2. Obtain the object at the starting point (use gePointToFig()
      or dbGetOverlaps() with a depth of 0 for this)
    3. Check that the object is on a routing layer
    4. Add this object to the list of connected shapes
    5. Use dbGetTrueOverlaps() to find objects overlapping this
      shapes' bounding box (decide the hierarchy depth you wish to
      use)
    6. Filter the objects to remove non-adjacent connectivity layers
      compared to the current object, also filter any shape that is
      already on the list of connected shapes
    7. Add these objects to the list of connected shapes
    8. Repeat from Step 5. (recursive?) to follow connected shapes

    The above is just an outline for finding the "connected" shapes in a similar fashion to the Mark Net feature. You may wish to add highlights to show what is being processed. The decision of whether something is connected will depend on the layers used, you may wish to use information from the Technology File (IC5141) or the viaDefs (IC61x) similar to how Mark Net works.

    I hope that this information is helpful to you.

    Best regards,

    Lawrence.

Reply

  •  Hi Harish,

    I will add to what Derek and Andrew have said by providing an outline of how I would approach this in SKILL code:

    1. Get a starting point (xy provided perhaps by enterPoint() or
      enterPoints()) or starting shape from the user
    2. Obtain the object at the starting point (use gePointToFig()
      or dbGetOverlaps() with a depth of 0 for this)
    3. Check that the object is on a routing layer
    4. Add this object to the list of connected shapes
    5. Use dbGetTrueOverlaps() to find objects overlapping this
      shapes' bounding box (decide the hierarchy depth you wish to
      use)
    6. Filter the objects to remove non-adjacent connectivity layers
      compared to the current object, also filter any shape that is
      already on the list of connected shapes
    7. Add these objects to the list of connected shapes
    8. Repeat from Step 5. (recursive?) to follow connected shapes

    The above is just an outline for finding the "connected" shapes in a similar fashion to the Mark Net feature. You may wish to add highlights to show what is being processed. The decision of whether something is connected will depend on the layers used, you may wish to use information from the Technology File (IC5141) or the viaDefs (IC61x) similar to how Mark Net works.

    I hope that this information is helpful to you.

    Best regards,

    Lawrence.

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