Stats

  • Locked Locked
  • Replies 3
  • Subscribers 143
  • Views 14881
  • Members are here 0
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Creating PCells with rounded shapes

Miguel V

Hello,

I'm trying to create a PCell with rounded or curved shapes.  I know how to create rectangles and polygons using the rodCreateRect() and rodCreatePolygon() methods, but I wanted to know if there is an easier way to create a ROD object with curves, instead of using rodCreatePolygon() with a list of dozens or hundreds of points. 

Thanks,

Miguel 

  • skillUser

    Hi Miguel,

    As far as I know the ROD functionality does not extend to non-rectlinear shapes.  The following functions are probably what you need:

    dbCreateEllipse(
    d_cellView
    txl_layerPurpose
    l_bBox
    )
    => d_ellipse / nil

    Creates an ellipse.

    dbCreateArc(
    d_cellView
    txl_layerPurpose
    l_ellipse_bBox
    l_arc_bBox
    )
    => d_arc / nil

    Creates an arc.

    There are also 'donut' shapes. Outside of these I don't know of other curved shapes you can create.

    Hope this helps!

    Lawrence.

  • skillUser

    Also there are these two functions that might help, after you have created the ellipse or donut: dbConvertEllipseToPolygon( d_ellipse x_nSides ),  dbConvertDonutToPolygon( d_donut x_nSides )

  • Miguel V
    in reply to skillUser

    Hi Lawrence,

    Thanks for the response.  I actually found another way.  If I create a polygon by drawing it out, I can create it as a ROD object.  Then once I have all of the pieces I need, I can merge them together and then I have my finalized ROD object with curved features.

    Miguel

Community Guidelines

The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information. By accessing, contributing, using or downloading any materials from the site, you agree to be bound by the full Community Guidelines.