3D Real-Time GPU Smoke Simulation with Haptic Rendering

[Robinerd]

It's very impressive that this can be done in real-time with an old 8800 card. Must be really well optimized, I sense great programming skills!

[mtracer100]

@sjg7123 ati radeon hd 4550 sapphire

[yellowfellow]

i remeber when i used to be so obsessed with smoke in videogames, it almost seems like nobody try anymore though :(

[camelon]

can we use it for engineering solutions or is it just a visul content, please if anybody know something message me

[sjh7132]

I believe GPUs are limited to 32 bit math, and I think if you want real engineering numbers you should have 64 bit precision. But that's just my opinion.

[mtracer100]

@sjh7132 My GPU actually has 128 bit math. I was actually very surprised myself.

[sjh7132]

@mtracer100

Really!?!? Which model is that?

[Grimmcorpse]

@sjh7132 Shouldn't the amount of flops determine if it's suited for the task or not? I mean.. the newest firestream can handle 1-1.2 teraflops, should be enough.. :p

[sjh7132]

@Grimmcorpse

That is an impressive amount of processing power, but the math has to be done with enough bits so that round off error doesn't add up. If there is 128 bit math, then that's great. I don't think 32 bit math is good enough for engineering.

[whoppix]

@sjh7132 Rather than just increasing the precision of your floating point operations, you can often use an algorithm more numerically stable or a different algebraic formulation of the formula (for instance you would try to avoid things like substraction of two similar numbers or addition of a positive and a negative number), by installing alternative code-paths. Most GPUs nowadays only really have good SP (single precision, 32 bits) performance, but you can use mixed precision, if you need to.

[sjh7132]

@whoppix

I don't think it's that simple. When working with meshes you end up adding the affects of many little influences to get the total result. Maybe some of what you say can be applied, but I don' think it's a replacement for 64 bit.

[whoppix]

@sjh7132 Well, it depends on what you do, you can do lots more than just graphics on modern GPGPUs, many are used for simultaneous solving of linear systems, simulations, etc, etc. So it entirely depends on your use-case. GPUs traditionally only have good single-precision performance because for the typical applications of 3D rendering & co in games and simple simulations, it doesn't matter a whole lot, and errors do not normally accumulate.

[vectoranime123]

what kind of graphic card did you use and how many computers

[lookiSVK]

@vectoranime123 you is blind or what?

[speedaddict2008]

Where can I get the .exe from?

[garvess]

Thats awesome, so realistic.

[Sclunger]

What song is it!? There is a awesome remix.

[sonofhendrix]

How many GFLOPS does it take to do that?? I only have an x1950xt, i don't think there's any GPU processing it can do, even folding at home don't support the x1900 series any more. I love to play with them real time physics demos, but non are ever available to the public.

[moszaher]

gr8 job

[joctee]

VERY NICE REALTIME SMOKE!

[Graylord88]

DX10 is doing graphical wonders....

Looks like the dx10 smoke in hellgate london, i put up a vid example if interested.

[TopGunMan]

not exactly, this doesn't look good because of DX10, it looks realistic cause it was physics computed and thus behaves very realistically. DX10 just fakes stuff and adds effects so it looks real. This actually IS virtually real. Nothing close to this has been put in a game besides the physX stuff.

[Graylord88]

Well, now i run PhysX aswell

[TopGunMan]

can't say im not jealous :( i have ati card T.T sucks!!!!