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Enable N-Patch (Truform) for Geforce Cards?

P

Pyro

Limp Gawd
Joined
Mar 10, 2000
Messages
130
Is there anyway to enable N-patches (aka Truform for ati cards) on Geforce cards? Nvidia in the past previewed the technology but has not implement the feature in their driver sets. Is there a hack of some way to enable it?
 
Truform is an ATi term for N patches (tesselation). NVIDIA disabled HOS in drivers around the time of the GF3 Ti cards because games that enabled Truform by default made the GF3 run it in software mode since it didn't support N patches in hardware.

I haven't heard of that since and I'm not sure if you can enable it in games individually (I don't have any games with a Truform option that I can think of). You can force it always on with ATI cards, but there's no option in NVIDIA drivers for doing the same.
 
UT2K3 and Serious Sam games support Trueform... pics have been posted, and the occasional glitch has been posted as well.

Serious Sam engine blows the guns up if Trueform is maxed out if I remember correctly... people/monsters look better, but the shotgun looks more like the damn cannon...
 
UseNPatches=True for UT2003/UT2004(demo) does nothing on NVIDIA cards.
 
Originally posted by pxc
UseNPatches=True for UT2003/UT2004(demo) does nothing on NVIDIA cards.
Click to expand...
Never said it did, just the game supports Trueform. If you want pics, PM me I'll email them to you. They were posted on this forum sometime last year.
 
Originally posted by 0ldman
Never said it did, just the game supports Trueform.
Click to expand...
OK, don't get offended now. I'm just saying that enabling Truform in UT2003/UT2004demo demo does nothing on NVIDIA cards. I was trying to make an on-topic post since this thread was about enabling truform "for Geforce Cards". :rolleyes:
 
I've just tried UseNPatches=True and Application preference for TruForm on a Radeon 8500 running UT2004demo.

It doesn't seem to do anything yet (or at least I can't see much of a difference, I do have the default tesselization.) I hope its included in the final game.

Honestly I think its an often overlooked technology. I'm really tired of looking at octagonal wheels on vehicles and things like nuclear missles that should have rounded proportions to start with.

I'll post up screenies next week when my UT2004 DVD comes in.
 
I would not enable truform on anything above the Radeon 8500. It is done in software on the newer ATI cards and will take a huge performance hit.
 
Exactly... Unless someone has a 9800 and is still running at like 1024x768 and can afford to take the performance hit.

Its one of the reasons to keep the Radeon 8500, if you still play a lot of DX7 games (and unfortunately UT2004 is still pretty well DX7) it can make things look more realistic if TruForm is done properly. Mind you only a handful of games do it properly, but if you play them a lot its ok...
 
Originally posted by lopoetve
Why did they take that out of hardware, anyway?
Click to expand...
NVIDIA disabled HOS in drivers around the time of the GF3 Ti cards because games that enabled Truform by default made the GF3 run it in software mode since it didn't support N patches in hardware.
 
ATI decided it was an uneeded waste of transistors as people starting making games with much higher polygon counts which negated it's usefullness.
 
Yeah, Truform is really an add-on technology. Its not in any DX or OpenGL specification anywhere. Although technically AA and AF are add-on technologies too.

The decision was to axe it in favor of more die space for DX9 pixel and vertex shaders. And yup, if you want that much detail on the curvy textures you can just leave it up to the programmer to put it in manually by using more and smaller textures.

Really, it may come back someday as a specialized vertex "skinner". It would be welcomed as now with a floating point precision "skinner", it would look even better than trying to
"halve and approximate" that is used right now based on integers. Best and fastest would be a single equation Fractal skinner... But all of that is highly theoretical stuff.

I do want to see it come back someday though.. Theoretically you could get away with making a perfect sphere with only 64 textures. With a fractal sphere, in theory you could make it with 16... (This would greatly improve performance and visual quality on round textures)
 
Originally posted by pxc
OK, don't get offended now. I'm just saying that enabling Truform in UT2003/UT2004demo demo does nothing on NVIDIA cards. I was trying to make an on-topic post since this thread was about enabling truform "for Geforce Cards". :rolleyes:
Click to expand...
I didn't take offense, just wanted to make sure we were clear.
Whether it worked on Nvidia cards wasn't known to me, just stating the game does have it. That is still within the topic, just off on another branch.
:)
 
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