[vtkusers] Re: VTK or OpenGL directly? (Julian Holt)

[Mathieu Malaterre]

Julian,

	What kind of fem are you doing ? Only linear elements ? I am a bit 
surprised you choose to go the OGL way whereas VTK was meant especially 
for people like you: so that you save time in developping (using 
python/tcl for testing). And VTK gives you a higher layer of abstraction 
on top of OpenGL. VTK is also working and robust on a great variety of 
plateforms (thanks to cmake). And it has been prooven to be quite fast:

National Laboratories and US Army Leverage NVIDIA Quadro® Graphics and 
ParaView Software to Visualize Large Scientific Data at an Astounding 
1.5 Billion Triangles/Second
http://www.nvidia.com/object/IO_19962.html

I will be extremly interested if you could further details your choice 
(you can send me a personal email if you prefer).

Thanks for your time
Mathieu

Julian Holt wrote:
> Many thanks for your help.
> 
> I have been "playing" with OpenGL directly and have been able to pull
> together code to render my FE models + dynamically rotate them. A bit crude
> at the moment but performance is great.
> 
> Sooooo, it looks like I may go down the direct OGL route.
> 
> Many thanks for all the help
> 
> Julian
> 
> -----Original Message-----
> From: vtkusers-bounces at vtk.org [mailto:vtkusers-bounces at vtk.org]On
> Behalf Of Prashanth Dumpuri
> Sent: 22 March 2005 17:30
> To: vtkusers at vtk.org
> Subject: [vtkusers] Re: VTK or OpenGL directly? (Julian Holt)
> 
> 
> Julian,
> This might not answer your question of VTK or OpenGL..but you might not
> have to write codes. Have you looked into Mayavi ?
> (http://mayavi.sourceforge.net/). It's built using VTK and has a GUI
> interface.
> good luck,
> prashanth
> 
> 
>>----------------------------------------------------------------------
>>
>>Message: 1
>>Date: Tue, 22 Mar 2005 10:41:08 -0000
>>From: "Julian Holt" <jholt at cadfem.com>
>>Subject: [vtkusers] VTK or OpenGL directly?
>>To: <vtkusers at vtk.org>
>>Message-ID: <FHEJKOOFDJOEHMCAMBGDMEIGEGAA.jholt at cadfem.com>
>>Content-Type: text/plain;	charset="iso-8859-1"
>>
>>Guys
>>
>>This might be a strange question but hey.....
>>
>>I am writing a FE viewer and I am looking at VTK and various other "OGL
>>wrappers"
>>
>>But......
>>
>>I am wondering if infact VTK is NOT the way to go?
>>
>>Basically all I need to do is render 3 and 4 sided polygons with scalar
>>values at vertex points and then provide 3D rotation + interrogation.
>>
>>Now VTK does all this (and more) but as a newbie it seems to me that if I
> 
> am
> 
>>going to dive off and learn yet another API then why not just learn the
>>OpenGL API?
>>
>>I.E code OGL directly and forget wrapper apps.
>>
>>VTK obviously does a lot of other cool stuff (grid generation etc) but I
>>don't need to do that because my meshes are built in external FE codes. I
> 
> am
> 
>>only interested in display/viewing stuff.
>>
>>Having taken an OGL book home last night to read whilst watching tv (sad I
>>know), the OGL API doesn't look too bad and OGL is probably a more
> 
> portable
> 
>>skill - there is even a version that runs on mobile phones!!!!
>>
>>Thoughts?
>>
>>Is OGL a nightmare to code when you get into it?
>>
>>Thanks
>>
>>
>>Julian
>>
> 
> 
> 
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