slow 3D preview - Re: [Gtkradiant] [Bug 279] linux 1.2.* setups

Michael Schlueter
02 Feb 2002 12:18:25 +0100

Hi TTimo,

Am Mit, 2002-01-30 um 01.02 schrieb Timothee Besset:
> heh :-)

hmm :)

> Fortunately it got all sorted out. Now we need a nightly setup for linux 
> though. A nightly patch for the win32 version is going out tonight.

Looks like it is working now for win32 and linux.

> At 00:50 30/01/2002 +0100, you wrote:
> > > ------- Additional Comments From  2002-01-25 11:09 
> > -------
> > > holy fuck, what's that mess
> > > how many of the patches among the pile actually need to be applied now
> >
> >I'm sorry. I thought all patches were already included. Next time I'll
> >take a longer look on bugzilla.
> >
> >Next week I'll take a look why the 3D preview is so slow on my system (I
> >think software redering is used) or has somebody any solution for that?

I did a closer look on that yesterday. Testing radiant with different
graphic cards on nearly the same system showed that Matrox G400 and
Voodoo3 switches to software rendering and a NVidia GeForce2 not.
Searching the web for a solution I found following text on the Xfree86
Webside ( for Matrox G200 and

10.3.3. Performance and Features 

Software rendering will be used under any of the following conditions: 
     Using glDrawBuffer(GL_FRONT_AND_BACK). 
     Using point, line, or triangle smoothing. 
     Using glLogicOp. 
     Using glPolygonStipple or glLineStipple. 
     Using 1D or 3D textures. 
     Using texture borders. 
     Using glDepthFunc(GL_NEVER). 
     Using the accumulation buffer.

Is anything of that done in radiant?

Bye, Michael