Turning a path into a wireframe

[Salvar]

Hi.

I'm currently trying to turn a set of coordinates that form a curved line into a wireframe of a road where these coordinates define the middle of the street.

The simplest I've come up with is using the coordinates to draw a very thick line (via viz.LINE_STRIP and viz.linewidth) and setting the polygon mode to POLY_WIRE, but it comes out as a filled line with very jaggy edges.

Any ideas? I'm probably missing something obvious here.

Thanks.