extract connectivity using skill

Harish,

Seeing your code would probably have helped, but my guess is that you're not understanding the output of dbGetTrueOverlaps. If it's a top level (level 0) shape, you get it directly, but if down in the hierarchy (e.g. inside a via or an instance of some sort), you'll get a set of instance (or via) dbobjects prior to the actual object, which are giving  you the hierarchical path down to that shape. You can't pass this directly to dbCopyFig - instead you need to compute the appropriate transform and then copy the figure itself. I've usually used functions like this:

/*****************************************************************
*                                                                *
*                (abGetOverlapTransform overlap)                 *
*                                                                *
* Get the transform needed to transform the shape in the overlap *
*           into the current cell's coordinate system            *
*                                                                *
*****************************************************************/

(procedure (abGetOverlapTransform overlap)
  (let (transform)
       (if (listp overlap)
	   (setq transform (dbConcatTransform 
			    (abGetOverlapTransform (cadr overlap))
			    (or
			      (dbGetq (car overlap) transform)
			      (list (dbGetq (car overlap) origin)
				    (dbGetq (car overlap) orient)
				    1.0)
			      )
			    ))
	   (setq transform (list 0:0 "R0" 1.0)))
       transform
       ))

/***************************************************************
*                                                              *
*                 (abGetOverlapShape overlap)                  *
*                                                              *
*         get hold of the actual shape in the overlap          *
*                                                              *
***************************************************************/

(procedure (abGetOverlapShape overlap)
  (if (listp overlap)
      (abGetOverlapShape (cadr overlap))
      overlap))

to compute the transform and find the shape, and then call:

(dbCopyFig (abGetOverlapShape overlap) cellView (abGetOverlapTransform overlap))

But you could also use geGetInstTransform() to find the transform from the overlap. In these examples, overlap is one of the items in the list of results from dbGetTrueOverlaps().

Essentially at step 5 in your list, you are calling your function again - tracing the shapes from that. You need to keep track of shapes you've already seen, to avoid visiting them over and over again...

Sorry, don't have time to go into more details.

Regards,

Andrew.

Harish,

Seeing your code would probably have helped, but my guess is that you're not understanding the output of dbGetTrueOverlaps. If it's a top level (level 0) shape, you get it directly, but if down in the hierarchy (e.g. inside a via or an instance of some sort), you'll get a set of instance (or via) dbobjects prior to the actual object, which are giving  you the hierarchical path down to that shape. You can't pass this directly to dbCopyFig - instead you need to compute the appropriate transform and then copy the figure itself. I've usually used functions like this:

/*****************************************************************
*                                                                *
*                (abGetOverlapTransform overlap)                 *
*                                                                *
* Get the transform needed to transform the shape in the overlap *
*           into the current cell's coordinate system            *
*                                                                *
*****************************************************************/

(procedure (abGetOverlapTransform overlap)
  (let (transform)
       (if (listp overlap)
	   (setq transform (dbConcatTransform 
			    (abGetOverlapTransform (cadr overlap))
			    (or
			      (dbGetq (car overlap) transform)
			      (list (dbGetq (car overlap) origin)
				    (dbGetq (car overlap) orient)
				    1.0)
			      )
			    ))
	   (setq transform (list 0:0 "R0" 1.0)))
       transform
       ))

/***************************************************************
*                                                              *
*                 (abGetOverlapShape overlap)                  *
*                                                              *
*         get hold of the actual shape in the overlap          *
*                                                              *
***************************************************************/

(procedure (abGetOverlapShape overlap)
  (if (listp overlap)
      (abGetOverlapShape (cadr overlap))
      overlap))

to compute the transform and find the shape, and then call:

(dbCopyFig (abGetOverlapShape overlap) cellView (abGetOverlapTransform overlap))

But you could also use geGetInstTransform() to find the transform from the overlap. In these examples, overlap is one of the items in the list of results from dbGetTrueOverlaps().

Essentially at step 5 in your list, you are calling your function again - tracing the shapes from that. You need to keep track of shapes you've already seen, to avoid visiting them over and over again...

Sorry, don't have time to go into more details.

Regards,

Andrew.