CGAL users discussion list

Quoting "Martin Baroš" 
<>:

> > I think so. As far as I know, there is not graphics view item for
> > arrangement.
> > You'll need to draw each curve of the arrangement one by one.
> I'm just not sure how could I draw it in correct way.
> In case, that I would have in arrangement just line segments it would be
> easy, but if I have curved lines I can get source and target of the curve
> easily, but how to draw curved line between start and end points correctly?
> I still can't find any suitable Qt object for this drawing.

If you cannot draw the curve as is, then you need to approximate it  
with a polyline and draw the linear segments that comprise the  
polyline. Some of the traits classes in the arrangement package  
contain an operation that does the approximation.

> Thank you for your answers, I really appreciate that.
>
> Martin
>
>
> On Thu, Aug 27, 2009 at 10:26 AM, Laurent Rineau (GeometryFactory) <
> >
>  wrote:
>
> > On Wednesday 26 August 2009 16:10:54 Martin Baroš wrote:
> > > Hi,
> > > thank you for your answer.
> > > I'm using Qt Graphics View framework and I can draw geometric objects
> > > without problems.
> > > But I'm still not sure how to draw content of arrangement - should it be
> > > done by fetching X_monotone_curve one by one from arrangement and then
> > > drawing in Qt scene?
> >
> > I think so. As far as I know, there is not graphics view item for
> > arrangement.
> > You'll need to draw each curve of the arrangement one by one.
> >
> > --
> > Laurent Rineau, PhD
> > Release Manager of the CGAL Project
> > http://www.cgal.org/
> > R&D <http://www.cgal.org/%0AR&D> Engineer at GeometryFactory
> > http://www.geometryfactory.com/
> > --
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