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Forums > Custom IC > Shared code - SKILL

Subject: polygon in a pcell
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mims
Posts: 6
Online: User is Offline
11/06/2007 7:19 AM  
Hi,

I need a pcell with a parameterized polygon in it.
Are there any pcell - safe functions that can be used to create an orthogonal polygon?

Thank you!

mims
adbeckett
Posts: 248
Online: User is Offline
11/06/2007 8:08 AM  
Not sure I really understand. You can use dbCreatePolygon in a pcell with no trouble - and the points can be derived from whatever parameters you define for the pcell.

Regards,

Andrew.
mims
Posts: 6
Online: User is Offline
11/07/2007 3:52 AM  
I am using rodCreatePolygon which can produce a non-orthogonal polygon, just as dbCreatePolygon.

The pcell parameter that I use to define the polygon is _coords. I add an additional point to it in case that the shape would become non-orthogonal. The drawn polygon is orthogonal. Afterwords I define stretch handles on it (with a user function which alters the corresponding x or y coordinates of the two points affected by the stretch). In the case of an additional point added the results of the stretch were unexpected. In the user stretch function I printed the properties of the instance and the value of the _coords was the original value that is supllied to the pcell before the check for orthogonality.

I don't know if this makes any sense. On draw the pcell uses the correct value of _coords and on stretch it uses the original unmodified value supplied by the user during the pcell instantiation.

I was wondering if I am missing an obvious solution.

Regards,

mims
adbeckett
Posts: 248
Online: User is Offline
11/07/2007 5:19 AM  
Perhaps you could post the code? That would make it much easier to figure out what's wrong. From what you've described, there are lots of opportunities to make a mistake...

Regards,

Andrew.
mims
Posts: 6
Online: User is Offline
11/07/2007 8:37 AM  
Here is the code... It did get messy and more complex that it is needed.. The other way that I was thinking of to implement stretching was to create the cell dynamically, but this seemed simpler.

Regards,

mims

Attachment: polygon.il
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Forums > Custom IC > Shared code - SKILL > polygon in a pcell


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