Re: [OctDev] convhulln options.

[Pedro T. <pt...@te...>]

El Viernes, 19 de Diciembre de 2003 06:24, a Paul Kienzle  se le ocurri=F3 =
decir=20
lo siguiente:

> >> I think the most convenient would be to return a cell-array of
> >> matrices,
> >> one for each dimension of returned facet.
> >
> > Sorry, I did not understand the above statement.  Could you give an
> > example,
> > please?
>
> A =3D { [7 4 3; 4 6 2; 6 7 5; 7 6 4], [5 7 3 1; 6 5 1 2] }
>
> This is the same information as above but you can process it with
> "for i=3D1:2" rather than "for i=3D1:6".

Be carefull... if we are returning more things from qhull the order is=20
important, unless you also return the facet ID.


> Okay.  But aren't we supposed to be avoiding QJ?  Is there a way to
> break up a non-simplicial facet which doesn't introduce errors?

That's what Qt is supposed to do, but as Rafael also noticed, this option i=
s=20
not working under octave properly.

> I can't propose a final design because I don't know how to use
> QHull effectively.  You tell me what options you want to control
> and what they mean, and I can suggest an interface.

QHull has many, many options. In fact delaunay* and voronoi* are just QHull=
=20
with parameters. I can prepare a list of the options I think are most=20
important. I'll mail them to the list as soon as I prepare it.

Regards,
Pedro