Re: Release candidate for Qhull 2012.1

[Ben Abbott]

On Jan 29, 2012, at 8:27 PM, Rik wrote:

> So the default case for the 3D cube input is to pass the option "Qt".  The 
> question still remains why this input with this option works perfectly fine 
> on Fedora, but not on Lion.  If it is an option passing problem you could try 
> passing "Qt" directly on the command line.  This will replace the default 
> option string.
> 
> 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");
> assert (size (h), [6 4]); 
> 
> I still expect that to fail in Lion, but it is worth testing.
> 
> --Rik

Rik,

On Matlab ...

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);

h =

     3     4     2
     2     4     1
     6     2     1
     5     6     1
     4     8     1
     8     5     1
     7     3     2
     6     7     2
     7     4     3
     7     8     4
     7     6     5
     8     7     5


v =

     1

[h, v] = convhulln (cube, {'Qt'})

h =

     3     4     2
     2     4     1
     6     2     1
     5     6     1
     4     8     1
     8     5     1
     7     3     2
     6     7     2
     7     4     3
     7     8     4
     7     6     5
     8     7     5

v =

     1

I get the same with Octave (tip below) on MacOSX 10.7.2 (Lion).

$ hg tip
changeset:   14282:b4d7de953066
tag:         tip
user:        Michael Goffioul <address@hidden>
date:        Sun Jan 29 12:53:05 2012 +0000
summary:     Export more required symbols [Win32].

Does Fedora really return a 6x4 matrix for the first test?

Ben