[vtkusers] Molecule structure

Fri Apr 29 06:13:51 EDT 2005

re : OpenGlPolyDataPointSpriteMapper 
There have been lots of changes in cvs over the last month or so and the tarball may not compile with the current head (but it should). The GLEW code which handles open gl extensions can now be replaced by the opengl extension manager stuff that has gone in. This'll make the code easier to maintain. I'm waiting for a publically accessible cvs server to be set up here and then I'll keep the code sync'ed with the vtk cvs head.

you should be able to update vtk from cvs, go to www.vtk.org and follow instructions, then the vtkopengl.h file ought to be there. I'm up to my ears preparing for our Open day on May 7th. If you can wait until after then I'll sort out a new tarball and get everything synchronized with cvs again.

It should work though. One caveat. For Molecule visualization, I need to add a new array for size sorting of spheres. you can't do a glPointsize inside a glBegin/glEnd block so I need to sort spheres by size and then loop over them. However, I have a better plan to create a new Mapper using programmable GPU stuff anyway which'll make this sort of thing much easier.

ttfn

JB

-- 
John Biddiscombe,                            email:biddisco @ cscs.ch
http://www.cscs.ch/about/BJohn.php
CSCS, Swiss National Supercomputing Centre  | Tel:  +41 (91) 610.82.07
Via Cantonale, 6928 Manno, Switzerland      | Fax:  +41 (91) 610.82.82

----- Original Message ----- 
From: "Julien Alizier (free.fr)" <julien.alizier at free.fr>
To: "PETROV Alexey" <alexey.petrov at opencascade.com>
Cc: <vtkusers at vtk.org>
Sent: Thursday, April 28, 2005 1:29 PM
Subject: Re: [vtkusers] Molecule structure

> replying to myself...
> 
> Just googled and I saw the file vtkOpenGL.h is present in viewcvs :
> http://vtk.org/cgi-bin/viewcvs.cgi/Rendering/
> 
> but I can't access the server.
> 
> -- Julien
> 
> 
> ----- Original Message ----- 
> From: "PETROV Alexey" <alexey.petrov at opencascade.com>
> To: "Julien Alizier (free.fr)" <julien.alizier at free.fr>
> Sent: Thursday, April 28, 2005 12:42 PM
> Subject: Re: [vtkusers] Molecule structure
> 
> 
>> Hello Julien,
>>
>> Julien Alizier (free.fr) wrote:
>>
>>> Hi José,
>>>
>>> You may improve rendering speed using tricks in OpenGL.
>>> The extensions GL_ARB_POINT_SPRITE and GL_NV_POINT_SPRITE may be very 
>>> efficient.
>>>
>>> See this previous post :
>>> http://public.kitware.com/pipermail/vtkusers/2005-March/079009.html
>>
>> Your proposition is wonderful.
>> However I can not check it.
>> There is follow compiler error:
>>
>> Compiling...
>> vtkOpenGLPolyDataPointSpriteMapper.cpp
>> D:\apo\CSCS\CSCSCommon\vtkCSCSBase\vtkOpenGLPolyDataPointSpriteMapper.h(28) 
>> : fatal error C1083: Cannot open include file: 'vtkOpenGL.h': No such file 
>> or directory
>> Error executing cl.exe.
>>
>> Could you check the problem?
>>
>>>
>>> and this document :
>>> http://www.irisa.fr/orap/Forums/Forum17/Jean.Favre.ORAP.pdf
>>>
>>>
>>> HTH
>>> -- Julien
>>>
>>>
>>>
>>> ----- Original Message ----- From: "Paul Cochrane" 
>>> <cochrane at esscc.uq.edu.au>
>>> To: "José Alonso Romero Matías" <jarommat at gmail.com>
>>> Cc: <vtkusers at vtk.org>
>>> Sent: Thursday, April 28, 2005 6:30 AM
>>> Subject: Re: [vtkusers] Molecule structure
>>>
>>>
>>>> Jose,
>>>>
>>>> I've had similar problems with viewing 300,000 spheres in space.  The
>>>> solution to the speed of the rendering was to use a vtkStripper filter 
>>>> just
>>>> before the vtkPolyDataMapper.
>>>>
>>>> Assuming you're generating a grid with spheres at the node points, the
>>>> process is something like this:
>>>>
>>>> SphereSource -> Glyph3D -> Stripper -> PolyDataMapper -> Actor -> Render
>>>>
>>>> Hope that helps!
>>>>
>>>> Paul
>>>>
>>>> * José Alonso Romero Matías (jarommat at gmail.com) [050428 02:41]:
>>>>
>>>>> Hello,
>>>>>
>>>>> I am newby in VTK and Visualization, and I am searching tips for make a
>>>>> molecule structure...
>>>>>
>>>>> I have a array of actors, one by an atom in my molecule...
>>>>>
>>>>> It functions well, but when the molecule has more than 100,000 atoms, 
>>>>> the
>>>>> renderization is very slow.
>>>>>
>>>>> Can you help me?
>>>>>
>>>>> Thanks
>>>>>
>>>>> -- 
>>>>>
>>>>> José Alonso Romero Matías
>>>>> Prik Tehuacán
>>>>
>>>>
>>>>> _______________________________________________
>>>>> This is the private VTK discussion list.
>>>>> Please keep messages on-topic. Check the FAQ at: 
>>>>> http://www.vtk.org/Wiki/VTK_FAQ
>>>>> Follow this link to subscribe/unsubscribe:
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>>>>
>>>>
>>>>
>>>> -- 
>>>> Paul Cochrane
>>>> Computational Scientist/Software Developer
>>>> Earth Systems Science Computational Centre
>>>> Rm 703, SMI Building
>>>> University of Queensland
>>>> Brisbane
>>>> Queensland 4072
>>>> Australia
>>>>
>>>> _______________________________________________
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>>>
>>>
>>>
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>>
>> 
> 
> 
> 
> _______________________________________________
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