OpenGL cards and multiple windows / WinNT

[Ron Inbar]

A comment regarding wireframe rendering: as far as I know, vtk doesn't use
OpenGL's GL_LINE polygon mode; instead of rendering polygons as usual and
letting OpenGL do the dirty work, it explicitly renders their contours as
lines.  I'm almost certain this causes a drop in performance.  I don't
understand exactly why this is done.  The thing to remember here is that
when you render wireframes, the driver can do very little to improve
performance.

Ron

----- Original Message -----
From: Nigel Nunn <nNunn at ausport.gov.au>
To: <vtkusers at gsao.med.ge.com>
Sent: éåí ùéùé 05 ðåáîáø 1999 09:40
Subject: OpenGL cards and multiple windows / WinNT


>
> For full-screen Vtk/OpenGL work, the cards based on Nvidia's TNT2/GeForce
> appear to offer great performance.  However, many of us work with multiple
> OpenGL windows mixed with a 2D GUI.
>
> I have not yet heard much feedback about the quality of the Nvidia cards
> when driving a number of small OpenGL windows on WinNT, switching between
> wireframe, and shaded/no textures (e.g. typical engineering usage).
>
> Those using 3DLabs' VX1 seem to be a happy bunch, especially if they have
> a second CPU to make use of the (non-beta) multi-threaded drivers.
>
> Now that the drivers for the TNT2/VX1 cards have matured, can anyone offer
> a comparison?  Will the GeForce/Quadra cards leave all else in their wake?
>
> Thanks,
> Nigel Nunn
>
>
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