[vtkusers] Molecule structure

Rasmus Hemph rasmus.hemph at chalmers.se
Thu May 19 09:42:45 EDT 2005 

I can confirm that the code is working with the current cvs (from two 
days ago). It has dramatically helped reduce rendering time for my case 
(3000-20000 particles). I would be very interested to know if/when you 
get size sorting to work!

One caveat. For some reason my computer locks up (X freezes, and I have 
to log in from another computer to kill it..) about every third time 
when I try to exit my application with the new 
OpenGlPolyDataPointSpriteMapper. I am running Debian linux 2.6 with the 
latest Nvidia display drivers. Have anybody experienced the same problem?

Rasmus Hemph


John Biddiscombe wrote:
> 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 
> <http://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 
> <mailto:julien.alizier at free.fr>>
> To: "PETROV Alexey" <alexey.petrov at opencascade.com 
> <mailto:alexey.petrov at opencascade.com>>
> Cc: <vtkusers at vtk.org <mailto: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 
> <mailto:alexey.petrov at opencascade.com>>
>  > To: "Julien Alizier (free.fr)" <julien.alizier at free.fr 
> <mailto: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 <mailto:cochrane at esscc.uq.edu.au>>
>  >>> To: "José Alonso Romero Matías" <jarommat at gmail.com 
> <mailto:jarommat at gmail.com>>
>  >>> Cc: <vtkusers at vtk.org <mailto: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 
> <mailto: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:
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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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