RT07 conference back
(L) [2007/09/10] [Phantom] [RT07 conference] Wayback!I'm in the middle of RT07 right now. Just did the keynote speech. I put up a small page with stuff:
[LINK http://rt07.raytracing.nl/] . You will find my paper there, plus presentation slides, the latest Arauna demo and full source code for it.
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(L) [2007/09/10] [davepermen] [RT07 conference] Wayback!nice read, lovely pictures.. testing the demo right now..
(L) [2007/09/10] [coldcity] [RT07 conference] Wayback!Yay! Downloading now. I'll be there in spirit.
(L) [2007/09/11] [Zakalwe] [RT07 conference] Wayback!I'm really annoyed I had to miss this. I have another workshop I'm obliged to go to on at the same time.
(L) [2007/09/11] [lycium] [RT07 conference] Wayback!demo doesn't run here :| amd x2, windows xp64.
pretty interesting stuff shown in the presentation and paper, i hope that's in the demo :D
(L) [2007/09/11] [craouette] [RT07 conference] Wayback!Nice paper phantom.
One question about multi-threaded kd-tree construction:
You say multi threading is not bringing much to the construction speed because most of the time is spent in evaluating costs for the first split.
Then, why don't you use three thread, one for each axes, evaluating the costs for the same triangle list ( but 3 EventBox lists)?
I suppose that the evalution requires almost the same number of operation on the 3 axes, so the time to build the tree is roughtly 1/3 of a single threaded builder.
craouette
(L) [2007/09/11] [Phantom] [RT07 conference] Wayback!That would already help quite a bit indeed. I would however rather try one of the binning approaches; at RT07 Wald proposed a quite interesting and very simple to implement binning technique for BVH's. He included details on parallelization. In other words: My approach was outdated before I wrote that, and I knew it. [SMILEY Smile] Luckily, they didn't bash me for that.
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(L) [2007/09/11] [craouette] [RT07 conference] Wayback!any reference available yet ?
(L) [2007/09/11] [Phantom] [RT07 conference] Wayback!Yes:
[LINK http://www.sci.utah.edu/~wald/Publications/2007///FastBuild/download//fastbuild.pdf]
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(L) [2007/09/12] [craouette] [RT07 conference] Wayback!thanks.
(L) [2007/09/12] [goodbyte] [RT07 conference] Wayback!I can't get [LINK http://rt07.raytracing.nl/] to work correctly. Was really hoping to be able to read through the source code on my way back to Sweden...
(L) [2007/09/12] [Phantom] [RT07 conference] Wayback!I'm sorry, the server colapsed... I posted the link on Gamedev too. It's maintained by one of my students, I'll ask him what's going on.
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(L) [2007/09/12] [davepermen] [RT07 conference] Wayback!uhh better don't get slashdotted then [SMILEY Smile]
(L) [2007/09/12] [Phantom] [RT07 conference] Wayback!Anyone got a decent server for me? [SMILEY Smile]
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(L) [2007/09/12] [coldcity] [RT07 conference] Wayback!Can put up a fast UK mirror as needed if req'd, PM me.
Well, fastish.
(L) [2007/09/12] [coldcity] [RT07 conference] Wayback!OK, done that:
Demo download: [LINK http://phantom.coldcity.com/AraunaRT07demo.rar]
Paper: [LINK http://phantom.coldcity.com/rtgames.pdf]
I'm afraid I didn't have the source or presentation to hand, but I've passed an FTP login to Phantom so hopefully he'll be able to upload it. Alternatively, I'll add them if someone can provide them.
It might die if the Gamedev.net lot find it but it should be fine for you lot [SMILEY Smile]
(L) [2007/09/12] [Phantom] [RT07 conference] Wayback!Where did you send that FTP info? Can you send it to [LINK mailto:bikker.j@nhtv.nl bikker.j@nhtv.nl]? That's the one I can check from here. I will upload the other two files as quickly as I can. Thanks a lot for hosting them!
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(L) [2007/09/12] [coldcity] [RT07 conference] Wayback!I'd PM'd you - now mailed [SMILEY Smile]
(L) [2007/09/12] [Wussie] [RT07 conference] Wayback!appearantly the flow of visitors (from gamedev probably) raped and violated my allotted bandwith, in stead of giving me a nice little message they decided to shut down my account for the rest of the month... So I'm sorry about that [SMILEY Very Happy] I figured they'd just give a warning or bill or whatever which i could redirect to Phantom then, but appearantly, they didn't.
Hope it didn't cause too much problems
if needed, I can arrange the rt07.raytracing.nl DNS to be rerouted to some other source to avoid dead links etc
(L) [2007/09/12] [coldcity] [RT07 conference] Wayback!Wussie, PM'd regarding CNAME. Temporary holding page up at [LINK http://phantom.coldcity.com/] - feel free to redirect traffic. I'm sure Jacco will upload the missing bits soon.
(L) [2007/09/12] [lycium] [RT07 conference] Wayback!you can shave 2mb off that rar archive using 7-zip btw.
(am i the only one who can't get the demo to run?)
(L) [2007/09/12] [davepermen] [RT07 conference] Wayback!i'll try it later on the sempron here.., but i guess win xp64 could pose a problem. what happens? nothing? crash?
(L) [2007/09/12] [lycium] [RT07 conference] Wayback!exactly nothing, i see process start and immediately die in task manager. nothing in the applog.
i doubt it's an xp64 thing (actually there's incredibly much "oooh 64bit voodoo" impression going around).
(L) [2007/09/12] [JuNC] [RT07 conference] Wayback!I get the same, process start then immediately die - amd x2, windows 2k.
(L) [2007/09/12] [lycium] [RT07 conference] Wayback!smells more like "intel compiler" than "windows x64" to me ;)
(L) [2007/09/12] [lycium] [RT07 conference] Wayback!nope, it has write permission (i supposed it will write a spatial index structure).
(L) [2007/09/12] [davepermen] [RT07 conference] Wayback!doesn't work on the sempron mobile with vista basic..
(L) [2007/09/12] [lycium] [RT07 conference] Wayback!also tested on athlon64 running win xp 32bit, no go :/
(L) [2007/09/12] [Wussie] [RT07 conference] Wayback!my sources tell me that [LINK http://rt07.raytracing.nl/] has been successfully forwarded to coldcity's hosting site. Thanks a lot for the help, I guess it should be accessible again [SMILEY Smile]
If someone could test to verify, that would be greatly appreciated [SMILEY Smile]
(L) [2007/09/12] [goodbyte] [RT07 conference] Wayback!verified [SMILEY Very Happy]
(L) [2007/09/13] [coldcity] [RT07 conference] Wayback!Just to say, the source distribution and presentation slides are now available from the [LINK http://phantom.coldcity.com/ mirror] - thanks to Wussie for the help [SMILEY Smile]
(L) [2007/09/13] [Phantom] [RT07 conference] Wayback!Thanks guys for sorting it out! RT07 had an extremely tight schedule so I have been sloppy with the comms over the last three days... Is the mirror able to deal with the gamedev attention? I'm asking because forwarding rt07.raytracing.nl of course also means that gamedev knows where to reach it...
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(L) [2007/09/13] [coldcity] [RT07 conference] Wayback!Hi Jacco,
No probs [SMILEY Smile] The server's doing fine, I'll keep an eye on it though. I've plenty of transfer allocation.
You can see usage stats (generated nightly) at [LINK http://phantom.coldcity.com/stats/]
Best,
Iain
(L) [2007/09/13] [calamari] [RT07 conference] Wayback!Most impressive demo, as always!
However, the demo did only start when I uncommented the fullscreen option in scene.txt.
Someone at gamedev talked about weird colorful artifacts with the moving lights. I have these as well, they seem to change colors and transparency randomly each frame:
[IMG #1 ]
This in on Windows Vista x64, with nVidia drivers 163.44 and a GeForce 8800 GTS, Intel QuadCore Q6600.
[IMG #1]:Not scraped:
https://web.archive.org/web/20071028083548im_/http://tinypic.ca/files/mws8mm06m4g3m0vq67ng.jpg
(L) [2007/09/13] [Phantom] [RT07 conference] Wayback!It looks like you enabled some other flags in scene.txt, because I can see the light sources. The hardware HDR postprocessing only works on ATi as far as I know, so that might be your problem.
I really need to start using a different DirectX template, because I'm using almost zero functionality and still I get compatibility issues... I just need that framebuffer, and post processing shaders, that's all.
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(L) [2007/09/13] [Wussie] [RT07 conference] Wayback!yeah, a different recent build caused some issues with the FPS overlay on Nvidia cards, don't know exactly what the deal was. Should/could be a nice assignment for some students to figure out later on this year? [SMILEY Razz]
(L) [2007/09/14] [ingenious] [RT07 conference] Wayback!The demo doesn't work on my Centrino @ 2GHz either - starts and immediately exist [SMILEY Sad]
(L) [2007/09/14] [lycium] [RT07 conference] Wayback!so it's got problems on intel computers too; i suppose now it'll get fixed ;)
(L) [2007/09/14] [KammutierSpule] [RT07 conference] Wayback!I've just watched the demo.. and.. uhmm it didnt make me happy at all!
I understand and apreciate the tecnical part alot. But visualy I dislike the quality, the image have lot of aliased issues :Z In the "trace geometry" (eg: when there are lot of details triang.. and are away of the camera) .. and in the textures (lack of mipmapping textures?)
I know you are developing a "RAW" RTRT, but in "future", what do you think/ideas how this issues could be solved without extreme use of anti-aliased?.. adaptative-anti-aliased? adaptative-anti-aliased-interpolation? what about something like LevelOfDetail for anti-aliasing propouses?
Keep the good work, and the good demo and papers [SMILEY Wink]
Mário "KammutierSpule" Luzeiro
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