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Find the center of a polygon segment

psill000

Methodology of how to find the center of a segment on a polygon.

I want to center objects, vias or labels, on a particular part of a polygon; for example, a "C", "H" or "Z" shaped polygon.

1) Should I chopped the object to find the polygons segments or is there a better method?

2) How or where to chop the polygon, should I do the edits in the cellview or a scratch view.

Paul

Parents

  • Paul,

    A couple of ways you could do this. One is to use dbLayerTile - although that will generate the tiled objects as shapes in the cellView. Another is to use the new "abe" functions in IC617 - I'd suggest you use something more recent than (say) IC617 ISR4 as there were a few challenges with the API in early ISRs. Something like this would do the job:

    cv=geGetEditCellView()
    shapesToTile=setof(fig geGetSelSet() fig~>isShape)
    abeInit(cv)
    abeShapes=abeLayerFromShapes(shapesToTile)
    iter=abeTileIterator(abeShapes)
    while(tile=iter->next
       dbCreateLabel(cv "text" centerBox(tile->bbox) "X" "centerCenter" "R0" "stick" 0.1)
    )

    This places a small "X" at the centre of each tile from the selected objects. The abe functions can even read hierarchical shapes - they're quite powerful. Note the "abe" means Advanced Boolean Engine - nothing to do with my name ;-)

    Regards,

    Andrew.

Reply

  • Paul,

    A couple of ways you could do this. One is to use dbLayerTile - although that will generate the tiled objects as shapes in the cellView. Another is to use the new "abe" functions in IC617 - I'd suggest you use something more recent than (say) IC617 ISR4 as there were a few challenges with the API in early ISRs. Something like this would do the job:

    cv=geGetEditCellView()
    shapesToTile=setof(fig geGetSelSet() fig~>isShape)
    abeInit(cv)
    abeShapes=abeLayerFromShapes(shapesToTile)
    iter=abeTileIterator(abeShapes)
    while(tile=iter->next
       dbCreateLabel(cv "text" centerBox(tile->bbox) "X" "centerCenter" "R0" "stick" 0.1)
    )

    This places a small "X" at the centre of each tile from the selected objects. The abe functions can even read hierarchical shapes - they're quite powerful. Note the "abe" means Advanced Boolean Engine - nothing to do with my name ;-)

    Regards,

    Andrew.

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