How to access Bottom level Bbox of an object according to top level

Ganesh,

Not sure how you retrieved the lower level object - if you got it via (say) dbGetOveraps or dbShapeQuery, then you can use dbGetHierPathTransform to transform it to the top level coordinate system. The alternative is that you'd need to know the ~>transform of each instance down through the hierarchy to the instance you have the object within, and call dbConcatTransform to concatenate these together (in the right order) to give you the overall transformation. Once you've got that overall transformation, you then call dbTransformBBox.

Note that in this forum (when replying to this post) I see a lot of relevant "Related Topics" on the right side of the page which are on a similar topic. For example, this one: How can I get an exact BBox from lower level to top?

Andrew.

Hi Andrew,

I will tell you what I want to do now because the objective is changed.

I want a pcell to be flattened in every cell in a given library.

I want to write a SKILL script where I will get a form where the inputs will be library and the pcell that I want to flatten.

After that It should flatten that pcell in every cellview where it is used.

Any ideas are also welcome.

Please help me.

Thank you

Ganesh Doddipatla.

Hi Andrew,

Sorry for being rude in the last response.Then I was in a hurry to complete the task.

Now I tried with the help of my colleagues and cadence forums previous requests.I am able to come only this far.

I am able to do the tasks individually but when I combine the script its not working.

My colleague gave me a suggestion to load this script in SKILL IDE writing.

It is showing an error But I am not able to find out the error. Please let me know where I can be wrong.

This is the error I am getting in virtuoso invalid libId (0x(nil)).

Thank You

Ganesh Doddipatla.

lib_name=hiCreateStringField(
?name 'libname
?prompt "Library Name"
?defValue ""
?editable t
)
pcell_name=hiCreateStringField(
?name 'pcell_name
?prompt "Pcell Name"
?defValue ""
?editable t
)
vncapflatten=hiCreateAppForm(
?formTitle "LVTNFET FLATTEN"
?name 'vncap_form
?callback 'getinfo
?fields list(
list(lib_name 5:5 375:30 85)
list(pcell_name 450:5 200:30 75)
))

hiDisplayForm(vncapflatten)

procedure(getinfo(fromvncapform)
info=hiGetCurrentForm()
lib=info~>lib_name~>value
libName=ddGetObj(lib)
pcellName=info~>pcell_name~>value
foreach( cell libName~>cells
if( setof( the_view cell~>views the_view~>name == "layout") then

cv = dbOpenCellViewByType(libName cell~>name "layout")))
foreach(inst cv~>instances
instName=inst~>cellName
if((instName== pcellName) then
dbFlattenInst( inst 10 t )
else
print("There is no lvtnfet_b")
))
)
)

There are numerous errors in the code. The field is called libname not lib_name and so that will result in lib ending up being nil; there are too many close parentheses on the cv=... line, and so that's wrong. Try this:

procedure(getinfo(fromvncapform)
  let((info lib libName pcellName cv instName)
    info=fromvncapform
    lib=info~>libname~>value ; field was misspelt as lib_name
    libName=ddGetObj(lib)
    pcellName=info~>pcell_name~>value
    foreach( cell libName~>cells
      if( setof( the_view cell~>views the_view~>name == "layout") then
        cv = dbOpenCellViewByType(libName cell~>name "layout")
        foreach(inst cv~>instances
          instName=inst~>cellName ; confusing var name (it's not the instance name)
          if(instName==pcellName then 
            dbFlattenInst( inst 10 t )
          else
            printf("There is no %s\n" pcellName)
          )
        )
      )
    )
  )
)

Thank you Andrew It is working.

The lib_name error is due to an confusion with my colleague and the other error is probably because I copied it from other program.

during that time i may have not copied properly.

Next time I will try to avoid these mistakes.

Thanks once again

Ganesh Doddipatla.