Speed - was Re: [Mesa3d-users] Mesa Botteneck?

[John S. <joh...@cr...>]

Brian;

I manage the FreeWRL VRML Browser for unixen; and was in the midst of
trying to speed it up. If you remember, I made some obtuse comment about
not getting more than 70fps out of FreeWRL, no matter how simple the
application.

My goal was to get a VRML world with ONLY background textures running
at about 60fps on a 750mhz pentium, Voodoo-3. If I could not achieve
this, I was going to start porting my application over to our idle
Onyx II. :-)


Here are my results:
Pre-0.27 release. freewrl tests/26.wrl -best (geom 300x300)

Fps: 41.6666650109822
Fps: 39.0625008731149
Fps: 40.9836055962702
Fps: 40.3225803350435
Fps: 39.0625008731149

Now, using texture objects:

Fps: 69.4444416849703
Fps: 73.529404546151
Fps: 75.7575659055696
Fps: 69.4444646805952
Fps: 75.7575659055696

Then, set up some environment variables...

setenv SST_SCREENREFRESH=75
setenv FX_GLIDE_SWAPINTERVAL 0
setenv SST_SWAP_EN_WAIT_ON_VIDSYNC 0

Fps: 208.333325054911
Fps: 227.272697716709
Fps: 227.272697716709
Fps: 178.57144681775
Fps: 208.333325054911
Fps: 208.333325054911

WOW!!! I guess that I should have RTFM'd the 3DFX doc in the docs
subdirectory...

> The FX_GLIDE_SWAPINTERVAL controls whether Glide syncs SwapBuffers
> to the refresh rate.  See Mesa/docs/README.3DFX

-- 
John Stewart
joh...@cr...      http://www.crc.ca/FreeWRL/

If windows is the answer, it must have been a stupid question.