how to get the bounding box of an instance excluding the labels inside that instance?

 Hi Ashley,

There is a function, dbComputeBBoxNoNLP(), that will calculate a cellviews' bounding box excluding any NLP labels that it contains, or its sub-cells.  Here is an example of how it might be used:

Now, I don't know if you are working in a layout (I will guess "yes") or a schematic, but there will likely be labels that are not NLP labels if you are working in a layout, so the above may not help too much.  If this is the case, then it may be necessary to write something like the dbComputeBBoxNoNLP() function yourself, excluding labels from the calculated bounding box. Let us know - someone may have already written such code that they wouldn't mind sharing.

I hope that the above is at least a good starting point, if not the actual answer that you are looking for.

Regards,

Lawrence.

Hi Lawrence,

Yes, I'm working in a layout.  The dbComputeBBoxNoNLP() function still includes the labels, maybe because the labels in my layout are not NLP labels.  I think I need to write the code myself. 

Can anyone give me an idea how to do it?  I have something in my mind but I'm not sure if it is the right way to do it.  I'm thinking of opening each of the instances' master and its sub-cells, select all objects excluding the labels and calculate the bbox of the group, and then close the opened cells once the bbox is determined.  I know it is not a good idea specially if an instance has sub-cells.  Is there a better way to do it?

Thanks for your help.

regards,

ashley

This is untested but I'm sure you can use it:

 procedure( getBoundingBox(cell @optional (transform list((0:0) "R0" 1.0)))
    let( (left bottom right top inst via mosaic lpp shape temp)
        
        foreach(lpp cell->lpps
            foreach(shape lpp->shapes
                if(shape->objType != "label" && shape->objType != "textDisplay" then
                    temp = geTransformUserBBox(shape->bBox transform)
                    left    = caar(temp)
                    bottom    = cadar(temp)
                    right    = caadr(temp)
                    top        = cadadr(temp)
                )
            )
        )
        
        foreach(inst cell->instances ; loop through instances
            if(inst->objType == "inst" then
                if(dbobjectp(inst->master) then
                    temp = getBoundingBox(inst->master dbConcatTransform(inst->transform transform))
                    if(!floatp(left) || caar(temp) < left then
                        left = caar(temp)
                    )
                    if(!floatp(bottom) || cadar(temp) < bottom then
                        bottom = cadar(temp)
                    )
                    if(!floatp(right) || caadr(temp) > right then
                        right = caadr(temp)
                    )
                    if(!floatp(top) || cadadr(temp) > top then
                        top = cadadr(temp)
                    )
                else
                    getWarn() ; the cell couldn't be opened so get the warning before its printed
                )
            )
        )
        
        foreach(via cell->vias ; loop through vias
            if(dbobjectp(via->viaHeader->master) then
                temp = getBoundingBox(via->viaHeader->master dbConcatTransform(list(via->origin via->orient 1.0) transform))
                if(!floatp(left) || caar(temp) < left then
                    left = caar(temp)
                )
                if(!floatp(bottom) || cadar(temp) < bottom then
                    bottom = cadar(temp)
                )
                if(!floatp(right) || caadr(temp) > right then
                    right = caadr(temp)
                )
                if(!floatp(top) || cadadr(temp) > top then
                    top = cadadr(temp)
                )
            else
                getWarn() ; the cell couldn't be opened so get the warning before its printed
            )
        )
        
        foreach(mosaic cell->mosaics ; loop through mosaics
            if(mosaic->mosaicType == "simple" then
                let((orient xy isOA newTransform mosaicTransform)
                    isOA = (isCallable('dbGetDatabaseType) && dbGetDatabaseType() == "OpenAccess")
                    orient = car(mosaic->tileArray)
                    when(isOA
                        mosaicTransform = dbConcatTransform(dbConcatTransform(list(mapcar('minus mosaic->xy) "R0" 1.0) list(list(0 0) orient 1.0)) list(mosaic->xy "R0" 1.0))
                    )
                    for(row 0 sub1(mosaic->rows)
                        for(col 0 sub1(mosaic->columns)
                            xy = list((xCoord(mosaic->xy) + (col * mosaic->uX)) (yCoord(mosaic->xy) + (row * mosaic->uY)))
                            newTransform = if(isOA dbConcatTransform(dbConcatTransform(list(xy "R0" 1.0) mosaicTransform) transform) dbConcatTransform(list(xy orient 1.0) transform))
                            if(dbobjectp(car(mosaic->instanceList)->master) then
                                temp = getBoundingBox(car(mosaic->instanceList)->master newTransform)
                                if(!floatp(left) || caar(temp) < left then
                                    left = caar(temp)
                                )
                                if(!floatp(bottom) || cadar(temp) < bottom then
                                    bottom = cadar(temp)
                                )
                                if(!floatp(right) || caadr(temp) > right then
                                    right = caadr(temp)
                                )
                                if(!floatp(top) || cadadr(temp) > top then
                                    top = cadadr(temp)
                                )
                            else
                                getWarn()
                            )
                        )
                    )
                )
            )
        )
        
        list(left:bottom right:top)
    )
)

inst = car(geGetSelectedSet())
println(getBoundingBox(inst))