Create a polygon buffer from a line polygon

jaspreetjhoja

Hi,

I am trying to access edge points of a path drawn in klayout.

I can only access center points rather than the edge points. Any ideas how to do this?

I thought of achieving this by creating a buffer polygon from a line to generate polygon edge points.

Are there any modules in klayout that allow this? If not, can I access path edge points directly from a cell?

Many Thanks,

Jaspreet

Matthias

Hi Jaspreet,

if you need the outline of a path, you can convert it to a polygon using "Path#polygon". From the polygon you will be able to retrieve the outline points. I think this is what you call the "buffer polygon".

Matthias

jaspreetjhoja

Hi Matthias,

I tried but it converts the path into a polygon line which does not have any buffer.
I have a DPath object which gets converted into a DPolygon object and I do not see any option to extract buffer or outline points, neither I see the option to create a polygon offset.

If its possible to perform polygon offset, I can create a buffer/outline. How can I implement this in Klayout?

Jaspreet

Matthias

Hi Jaspreet,

you mean resolving the polygon into points?

The points of the polygon you can get through iterating over the polygon points with Polygon#each_point_hull for the hull contour and the same for the holes (a polygon created from a path won't have holes).

A polygon can be moved as a whole using Polygon#move.

You find a lot details here: http://www.klayout.de/doc/programming/geometry_api.html

Matthias