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NVIDIA Competition 2008 / Soft Bodies & TET Files

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Syncaidius
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Posted: 8th Jul 2008 16:20
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Does anyone know the specific settings you have to use to create a TET file in the physics viewer? Im using the 2.7.3 SDK and it exports fine.

The problem is every time I load the TET file into my demo it crashes. I only managed to get it working once then when I recreated the tet file I cant seem to get it to load again now.

I've tried deleting all the obj and tet files from my program and re-exporting everything but that hasn't made a difference.

If anyone knows how to get them to load properly that'd be awesome.


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LeeBamber
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Posted: 8th Jul 2008 16:24
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Use 2.7.4 SDK to produce your TET files from the viewer. This is the version we use to produce our soft body models for the demos.

"Small, smart and running around the legs of dinosaurs to find enough food to survive, bedroom coders aren't extinct after all "
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Syncaidius
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Posted: 8th Jul 2008 16:31 Edited at: 8th Jul 2008 17:04
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I can't find 2.7.4 on Nvidia's site. The next SDK version they have after 2.7.3 is 2.8.0 which i've tried and crashes before it finishes exporting.

EDIT:
Problem solved. Seems by not ticking 'IsoSingle' before I export stops DBP from loading it.

Thanks for the help anyway Lee.


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Hoozer
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Posted: 8th Jul 2008 17:08
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@ Lee: What I also found out is, if the object is scaled small (in a 3D-editor it is about 1 unit) then the object behaves differently as if it was bigger (about 10 units)! My tyre just collasped to the ground when it was small, but as soon as it was big, it was "like" a tyre rolling! Is there a reason for that, I used the same PhysX-Viewer-Settings? (Maybe mass etc.?)

@ DBking: I tried the 2.8.1-SDK PhysX-Viewer with one object, that I thought is fine for a test (it was my turbine-wheel) and the viewer simulated everything fine, but when I tried to export, it crashed! (As many others said here!)
BUT when I tried a simpler object like the tyre of my car the export worked absolute fine?!! Somehow it seems to depend a bit on the object you try to export!
(Cause my turbine-wheel also crashed the 2.7.3-SDK-PhysX-Viewer!)

DBking, did you get my email? (I used your email-address from your signature.)

Hoozer

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Syncaidius
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Posted: 8th Jul 2008 17:21 Edited at: 8th Jul 2008 17:22
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Quote: "DBking, did you get my email? (I used your email-address from your signature.)"


Haven't checked my email for 2 days because of working on my demo. I jsut replied to it now though.

EDIT:
Seems making the mesh detail on the physX view 10 more than the subdivisions seems to help to.


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Kendor
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Posted: 8th Jul 2008 17:28
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To make the soft bodies for my entry, I've used the older 2.7.2 version and it works more or less correctly (fingers crossed ). An advise I can give you is to set the Subdivision Level as low as possible (lower than 25), so that the object maintains its volume (it does not liquify) and also for maintaining an acceptable frame rate.

Theory is when you know something, but it doesn't work. Practice is when something works, but you don't know why.
Programmers combine theory and practice: Nothing works and they don't know why.
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Syncaidius
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Posted: 8th Jul 2008 19:19
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Thanks for that Kendor.


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Mobiius
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Posted: 8th Jul 2008 21:57
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Where abouts in the nvidia site is this, I cant seem to find it!

3700+ Athlon 64 - Geforce 7600 GS - 2GbDDR2 RAM - 40Gb Hdd (In this pc) - Windows Vista Ultimate (x86)
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Kendor
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Posted: 8th Jul 2008 22:32
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http://developer.nvidia.com/object/physx_downloads.html

For the Physx Viewer you have to download the SDK core, not the System Software. As I've said to DBking, I recommend version 2.7.2.

Theory is when you know something, but it doesn't work. Practice is when something works, but you don't know why.
Programmers combine theory and practice: Nothing works and they don't know why.
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Mobiius
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Posted: 9th Jul 2008 03:15
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It's not gonna mess up anything is it? I prob already have the latest version.

3700+ Athlon 64 - Geforce 7600 GS - 2GbDDR2 RAM - 40Gb Hdd (In this pc) - Windows Vista Ultimate (x86)
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Kendor
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Posted: 9th Jul 2008 08:07
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It shouldn't. Each version of the SDK is installed in a separate folder (named according to the version), allowing the user to have multiple versions of the SDK at the same time.

Theory is when you know something, but it doesn't work. Practice is when something works, but you don't know why.
Programmers combine theory and practice: Nothing works and they don't know why.
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Syncaidius
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Posted: 11th Jul 2008 16:45 Edited at: 11th Jul 2008 16:46
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I have another problem with soft bodies. Seems when you have too many soft bodies or a soft body with too many tetrahedrons in it, force fields cease to work on anything (even rigid bodies). And when they do work and you delete them, the program crashes.


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LeeBamber
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Posted: 19th Jul 2008 02:00
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Send your crashing program to mike@thegamecreators.com and he can sort out a quick fix update to DarkPHYSICS.

"Small, smart and running around the legs of dinosaurs to find enough food to survive, bedroom coders aren't extinct after all "
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hackinc 2000
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Posted: 24th Jul 2008 09:07
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I'm experiencing the crashing with Soft Bodys Too. Also its good to see a way to create an Object Partially Soft, If this can be achive already, Tell Me how.

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Tv Xxx
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Location: Behind You!
Posted: 28th Jul 2008 22:27
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Hi All, I Was Crashing Out On The Latest Version Of The PhysX Viewer, So I Looked Around and Found This...

Earlier PhysX Viewer

That Worked For Me.

Yours Tv.

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