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Re: gEDA-user: pcjc2 tessellation



On Sun, 2011-05-29 at 11:37 +1000, Russell Shaw wrote:

> > Hi,
> > In _borast_bentley_ottmann_tessellate_bo_edges() which is from
> > _cairo_bentley_ottmann_tessellate_bo_edges(), i see you deleted
> >
> > case CAIRO_BO_EVENT_TYPE_INTERSECTION:
> >
> > What effect does this have on the types of polygons that can
> > be rasterized?
> 
> Think i know now. Polygons can't have edges that cross other edges.

You got it.. PCB doesn't allow self intersecting polygons, so I removed
support for rendering them in an attempt to manage the complexity (and
hopefully improve speed of) the tessellator.

-- 
Peter Clifton

Electrical Engineering Division,
Engineering Department,
University of Cambridge,
9, JJ Thomson Avenue,
Cambridge
CB3 0FA

Tel: +44 (0)7729 980173 - (No signal in the lab!)
Tel: +44 (0)1223 748328 - (Shared lab phone, ask for me)

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