Re: Release candidate for Qhull 2012.1

[Robinson, Melvin D]

On 1/29/12 10:34 PM, "Dmitri A. Sergatskov" <address@hidden> wrote:

>On Sun, Jan 29, 2012 at 10:28 PM, Ben Abbott <address@hidden> wrote:
>> What doesn't make sense to me is that Octave sets it's on defaults, and
>>in this instance the default is "Qt". With qhull < 2011 I get the Fedora
>>result.
>>
>> Can someone on Fedora (specifically qhull-2003) try ...
>>
>>         cube = [0 0 0;1 0 0;1 1 0;0 1 0;0 0 1;1 0 1;1 1 1;0 1 1];
>>        [h, v] = convhulln (cube, {"Qt", "FO"})
>>
>> ... and tell us what the result is ?
>>
>> Ben
>>
>>
>>
>
>octave:1>  cube = [0 0 0;1 0 0;1 1 0;0 1 0;0 0 1;1 0 1;1 1 1;0 1 1];
>octave:2> [h, v] = convhulln (cube, {"Qt", "FO"})
>Options selected for Qhull 2003.1 2003/12/30:
>  Qtriangulate  _pre-merge  _zero-centrum  _max-width  1
>  Error-roundoff 1.4e-15  _one-merge 9.7e-15  _near-inside 4.9e-14
>  Visible-distance 2.8e-15  U-coplanar-distance 2.8e-15  Width-outside
>5.5e-15
>  _wide-facet 1.7e-14
>h =
>
>   4   1   2   3
>   5   6   2   1
>   8   5   1   4
>   6   7   3   2
>   7   8   4   3
>   8   7   6   5
>
>v =  1
>

I'm sorry that I misreported, but the same make check failure for
convhulln did occur on Fedora as well:
ctave:1> test convhulln.cc verbose
>>>>> 
>>>>>/home/melrobin/octave/current_octave/octave/src/DLD-FUNCTIONS/convhull
>>>>>n.cc
  ***** testif HAVE_QHULL
 cube = [0 0 0;1 0 0;1 1 0;0 1 0;0 0 1;1 0 1;1 1 1;0 1 1];
 [h, v] = convhulln (cube);
 assert (size (h), [6 4]);
 h = sortrows (sort (h, 2), [1:4]);
 assert (h, [1 2 3 4; 1 2 5 6; 1 4 5 8; 2 3 6 7; 3 4 7 8; 5 6 7 8]);
 assert (v, 1, 10*eps);
!!!!! test failed
assert (size (h),[6, 4]) expected
   6   4
but got
   12    3
values do not match
octave:2> 

I must not have checked this very closely.


Does this fact help make a little more sense of things?
>