Need a Skill code to get a list of elements under a plygonal shape.

The only way to do this is to decompose the polygon into rectangles and run dbGetTrueOverlaps on each rectangle. If your polygons are not orthogonal, then you'll have to do some approximating. Cadence has a routine called dbLayerTile that will take an input shape and decompose it into trapezoids. If the original shape is orthogonal, then the results will be rectangles. The drawback to this routine is that it will actually create the trapezoids (or rectangles) in your layout where the source shapes are located. If you need to be able to work in a read-only mode, then you would have to mess around with a scratch cell to do your layer tiling. You alternative is to write your own polygon to trapezoid routine or find one out on the web.

 -Derek

 Derek is correct, using dbLayerTile will break an orthogonal polygon into rectangles which can then be fed to dbGetTrueOverlaps. The first  argument for dbLayerTile is a cellView ID so you could open a scratch cellView using dbOpenCellViewByType in "s" mode (including IC6.1.3) and create the resulting rectangles there. dbLayerTile returns the dbId's for the rectangles so you could then process them from there. I often open a scratch cellView and keep it open just for this type of issue, sharing it among multiple programs.

Ted

Thans a lot , it solved my problem.

But now I have one more issue that is when I am using  " dbGetTrueOverlaps " command , if there is any Guardring or any multipartpath present inside that area, This command returns list of dbid of the  multipartpath along with all the individual contacts and vias and layers.

I want  dbID of the MultipartPath only.

And How to diferentiate a " Path " and a " Multipartpath " in the layout.

car(geGetSelSet()) ~>??    for both Path and Multipartpath  gives the same kind of properties.

Amit,

One way that you could check is to see if rodGetObj() returns a rod object id or nil, if a rodObj:0x... is returned, then the path is possibly a multipart path. Then you could check the subShapes attribute of the rodObject to see if the path is indeed a multi-part path, or just a named rod path with no sub-parts. (Create->Multipart Path could create a rod path with no subparts, but then it is really just a rod-named path).

I hope that this answers your question, or at least helps you.

Regards,

Lawrence.

 Thank you Lawrence, because of you only now I have a bug free code.

Really it reduced my lot of work. Now I hve one more doubt How to get the dbid of last placed object in the layout,

because I want to get the dbid of the polygon but hiCreatepolygon  does not return any dbid.

Sounds like you want to use a combination of enterPolygon and dbCreatePolygon. The enterPolygon routine will allow you to define your own polygon creation interface. When it completes, you can use dbCreatePolygon to create the actual polygon and the return value of this routine is your dbId.

Derek

Derek ,

Acually I want to get the dbID of last placed object in the layout.I intentionally used lehiCreatePolygon command (whhich does not return any dbid). 

I can not use dbcreatePolygon command because I want to create the polygon using human interface  after that I will check the points of that polygon.

and in enterPolygon command also I need to give the list of points as an argument.

Thanks & Regards,

Amit 

The points argument is not required. This simple example (similar to the one in the documentation for enterPolygon) will allow you to create a polygon interactively:

procedure(myPolygon()
    enterPolygon(
        ?prompts list("Point at the first point of the polygon:" "Point at the next point of the poygon")
        ?doneProc "myPolygonDp"
        ?cmdName "My Polygon"
    )
)

procedure(myPolygonDp(w done pts)
  let((polyId)
    if( done then
        printf("Polygon entered was %L.\n" pts)
        polyId = dbCreatePolygon( w->editCellView leGetEntryLayer() pts)
    else
        println("Polygon entry aborted.")
    )
    polyId
  )
)

 Hi Amit,

The "doneProc" automatically has three arguments supplied, the "w" is the window id, done is t/nil indicating whether the user completed the action or aborted (e.g. by pressing "Esc" during the enterFunction command), and points are the digitized points that the user supplied.

I'm not sure that it is safe to rely on the selection giving the most recently added shape first.  However, it may just always work this way. A similar thing that you might be able to rely on more soundly is the cellview shapes attribute, for example:

cv = geGetEditCellView()
;; the following should give the most recent shape
car(cv~>shapes)
;; the folowing should give the most recent polygon shape
car(setof(sh cv~>shapes sh~>objType=="polygon"))

Hope it helps.

regards,

Lawrence.