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Rec.Autos.Simulators Archive

Force Feedback & Framerates

4 posts by 3 people · 25 Nov 1998 - 12 Jan 1999

Pat Dotson 25 Nov 1998#436489
Quoted text (7 lines)> I have a quick question about the Force RS and framerates in games. I am > running a P2 300 with 64 megs of ram and voodoo2 SLI. In Cart Precision > Racing I usually get 85 - 100 frames per second. When I enable Force > feedback, however, the frame rate drops to 17-30 frames per second. Why such > a dramatic drop? > Does Force feedback require that much of the cpu's power, > or is it just the way that particular game handles forcfeedback commands?
That is a huge drop, and it shouldn't happen in properly coded software. I believe the RS wheel should require less cpu resources than, say, the MS or Saitek FF wheel. The Force RS, and any other I-Force based FF wheel, has an on-board FF effects processor that controls the wheel. This processor should free the cpu from most of the overhead associated with force feedback. If I was more conspiritorially-minded, I might theorize the the slowdown was intentionally produced for Immersion products in CPR :) Can someone with an MS or Saitek FF wheel comment as to any slowdown it produces in CPR? I don't notice a slowdown in the Viper demo, but haven't done a comparison with and without FF enabled. The Viper FF effects are very well done. -- Pat Dotson IMPACT Motorsports http://www.impactmotorsports.com/pd.html
Cory Aver 25 Nov 1998#436490
I have a quick question about the Force RS and framerates in games. I am running a P2 300 with 64 megs of ram and voodoo2 SLI. In Cart Precision Racing I usually get 85 - 100 frames per second. When I enable Force feedback, however, the frame rate drops to 17-30 frames per second. Why such a dramatic drop? Does Force feedback require that much of the cpu's power, or is it just the way that particular game handles forcfeedback commands? Will I see a drop like tat in all Force enabled games? Any reply would be appreciated! Cory
Larry 12 Jan 1999#444891
The MSFFW also has an on-board processor to handle this. -Larry
Quoted text (7 lines)> The Force RS, and any other I-Force based FF wheel, > has an on-board FF effects processor that controls > the wheel. This processor should free the cpu from > most of the overhead associated with force feedback. > If I was more conspiritorially-minded, I might > theorize the the slowdown was intentionally produced > for Immersion products in CPR :)
Larry 12 Jan 1999#444892
I think that's the key in this case. That's some pretty bad software, and it probably doesn't have the best FF effects routines on the block. -Larry > That is a huge drop, and it shouldn't happen in > properly coded software.

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