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[Myirci <>]

Thank you for the reply, I see that I need to filter out the degenerate cases. Have nice week-end.  

On Thu, Mar 28, 2013 at 8:08 PM, Panagiotis Cheilaris <> wrote:

On Thu 2013-03-28 at 19:35:35 +0100, Myirci wrote:
> Dear CGAL Users,
>
> I'm using CGAL 4.1 with Ubuntu 11.10 32-bit.  While I'm trying to calculate
> the segment delaunay graph for a simple polygon, I think I'm getting a
> wrong output. After calculating the SDG, I iterate over the finite edges
> and and check what I've got (segment, ray, parabola segment, line). For the
> output of the simple polygon two parabola segments are also coming along
> with the rays and segments. However if I draw the same polygon for the SDG
> Demo, I do not have the parabola segments. Am I doing something wrong or is
> this a bug? I attached the simple code to regenerate my output. Also I
> attached my output.
>
> Thank you very much,
>
> Murat Yirci

> Ray: 172 27 173. 27
> Ray: -323 27 -323 26.
> Segment: 172 27 138.5000000000000 60.50000000000000
> Ray: 172 27 172 26.
> Ray: -75. 60.50000000000000 -75. 59.50000000000000
> Ray: 172 94 172 95.
> Segment: 172 94 138.5000000000000 60.50000000000000
> Ray: 172 94 173. 94
> Segment: 138.5000000000000 60.50000000000000 -75 60.50000000000000
> Ray: -323 94 -324. 94
> Segment: -323 94 -289.5000000000000 60.50000000000000
> Ray: -323 94 -323 95.
> Ray: -75. 60.50000000000000 -75. 59.50000000000000
> Ray: -75 60.50000000000000 -75 61.50000000000000
> Parabola_segment: -75 60.50000000000000 -75 60.50000000000000-75 60.50000000000000 -75 60.50000000000000
> Segment: -75. 60.50000000000000 -75. 60.50000000000000
> Parabola_segment: -75 60.50000000000000 -75 60.50000000000000-75 60.50000000000000 -75 60.50000000000000
> Ray: -75 60.50000000000000 -75 61.50000000000000
> Segment: -75 60.50000000000000 -289.5000000000000 60.50000000000000
> Ray: -323 27 -324. 27
> Segment: -323 27 -289.5000000000000 60.50000000000000

I think the input has many degeneracies. You do not see all these
parabolas because they have zero length. They are on point (-75,60.5).

Best,
Panos




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Murat Yirci