Alternatively, you could use VTK. It's a huge library that does all 
kinds of data-vis stuff, but it does know about voxels (it started off 
as a package for viewing MRI data I think). There are already python 
bindings available, and Kitware actually understand open-source ;-)

   Arthur

Sébastien Ramage wrote:
> Hi Thomas,
> 
> Voxel_VisDrawer.cxx and Voxel_VisDrawer.h are missing from OpenCascade, 
> just because (in my opinion) they don't include them so Voxel 
> visualization is not possible.
> I've asked OpenCascade to send me the files and they answered that the 
> files are available in the maintenance version 6.3.1 which is "delivered 
> exclusively to our custom development, support or product clients, or 
> via a separate yearly subscription."...
> So I think there is no way to display voxel directly... we must do it by 
> ourself, what a pity !
> 
> Below, the complete answer :
> 
> Dear Mr. Ramage,
> 
> Thank you for your request and your interest in Open CASCADE Technology 
> software.
> The files that you mention are available in Open CASCADE Technology 
> maintenance version 6.3.1 as files VoxelClient_VisDrawer.cxx and 
> VoxelClient_VisDrawer.h (they were renamed).
> 
> As you may learn from our web site at 
> http://www.opencascade.org/support/alacarte/maintrel/, Open CASCADE 
> Technology (OCCT) maintenance releases (such as 6.3.1) are delivered 
> exclusively to our custom development, support or product clients, or 
> via a separate yearly subscription. For your reference here below I list 
> several commercial options to get access to OCCT maintenance releases :
> 
> *a) Yearly subscription to maintenance releases*
> 
> As I already mentioned above, the maintenance releases are also 
> available to other parties which are not yet customers of OPEN CASCADE 
> SA. Such availability becomes possible via yearly subscription to 
> maintenance releases. This subscription grants you a right to receive 
> (download) all sequential maintenance releases issued in the period of 1 
> year. The price of such subscription is 1,990 Euro.
> 
> *b) Subscription to A la Carte support packages*
> 
> As you may see from above we do not offer purchasing a single 
> maintenance release but only a yearly pack. You may either choose this 
> alternative or you may consider a possibility to purchase one of our 
> A-la Carte support packages which grant you the same access and, in 
> addition, allowing to use our various support services.
> 
> As you might already learn from our web site 
> <http://www.opencascade.org/>, for a wide range of companies, to cover 
> all stages of software development process we offer support services 
> including :
> 
>     * E-Learning and Training
>       <http://www.opencascade.org/support/training/> to get acquainted
>       with the Open CASCADE capabilities,
>     * Help Desk <http://www.opencascade.org/support/alacarte/helpdesk/>
>       for instant answers to your technical questions (via email or phone),
>     * Technical Support
>       <http://www.opencascade.org/support/alacarte/techsupport/> and
>       Expert Consulting
>       <http://www.opencascade.org/support/alacarte/expconsult/> for the
>       best choice of functionality,
>     * Patch Requests
>       <http://www.opencascade.org/support/alacarte/patch/> to solve
>       quickly the blocking problems,
>     * Access to Advanced Samples
>       <http://www.opencascade.org/support/products/advsamples/>,
>     * *Access to maintenance releases
>       <http://www.opencascade.org/support/alacarte/maintrel/> (included
>       free of charge)*
> 
> To take advantages of any and each of Open CASCADE support services, the 
> best choice is to become a subscriber of one of our A la Carte support 
> packages. In A la Carte package, you have a fixed number of "units" you 
> can spend for any kind of support services according to the fixed rates 
> detailed at A la Carte Support page. Three A la Carte options are at 
> your disposal differing in the amount of available units :
> 
>     * Advantage = 42 units per quarter + 20 bonus units per year. This
>       package costs 5,000 Euro per quarter.
>     * Premium = 84 units per quarter + 44 bonus units per year. This
>       package costs 10,000 Euro per quarter.
>     * Excellence = 125 units per quarter + 72 bonus units per year. This
>       package costs 15,000 Euro per quarter.
> 
> Please take a minute to study our A la Carte programs at 
> http://www.opencascade.org/support/alacarte/.
> 
> *c) Subscription to E-learning*
> 
> The latest maintenance release of Open CASCADE Technology is available 
> not only to our A la Carte clients but also to those customers who 
> purchases our e-learning course 
> <http://www.opencascade.org/support/training/elearning/> (1,920 Euro).
> 
> Should you need any further information please do not hesitate to 
> contact me at your earliest convenience.
> Yours sincerely,
> Sergey
> 
> 
> 
> Le 18/03/2010 00:07, Thomas Paviot a écrit :
>> Hi Sébastien,
>>
>> Well, let's add these files to Display3d. But what should we put 
>> *inside* this files? Do you have any example of a voxel demo? I 
>> couldn't find one from the OCC forum.
>>
>> Thomas 
>>


-- 

Arthur Magill, PhD
RF Engineer

Centre d'Imagerie BioMédicale (CIBM)
Laboratory for Functional and Metabolic Imaging (LIFMET)
Ecole Polytechnique Fédérale de Lausanne (EPFL)

Postal address:

LIFMET-IPSB-SB
EPFL, Station 6
CH-1015 Lausanne
Switzerland

   tel: +41 21 693 0569
   fax: +41 21 693 7960
email: arthur.mag...@epfl.ch

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