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General Hardware Discussion Hard drives, CD, DVD Monitors, All hardware questions not better served by our other Topics


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  #1 (permalink)  
Old 19th September, 2002, 07:48 PM
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3d glasses - gimmick?

I jsut found some of these on a site from edimensional.com. They use split images to make you believe you are inside the picture. Does anyone know if these things actually get your card to render separate images - it requires 120Hz from the monitor so I guess getting the vSync rihgt would be a bit of a nightmare? Or do they just slightly shift a single image to make it look like each eye sees different things? Also what kind of resolution would you get - I'd gladly give up a 3D experience(I think) if it meant I didn't have to stay at 640*480 or something.

Not surprisingly enough the site isn't very forthcoming with such information. Gimmick or not?
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Old 19th September, 2002, 08:40 PM
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Olympus sells an Eyetrek that is 'supposed' to emulate 3D, but flails violently like a fish out of water. I've tried the Visiontek glasses out and found that they suck rather well also. Tried a 3rd pair out in a ritzy yuppie electronics shop and low and behold! they also sucked with undying vigor. Not trying to burst your bubble, but it seems the technology isn't available yet to consumers aside from very high end units.

From the experiences I've had, they tend to give you migrains and such in a short time. Also, the hardware is very bulky and tends to hurt the bridge of your nose in under 20 minutes.
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Old 20th September, 2002, 08:07 AM
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Quote:
Originally posted by unclemojo

From the experiences I've had, they tend to give you migrains and such in a short time. Also, the hardware is very bulky and tends to hurt the bridge of your nose in under 20 minutes.
ya got it
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Old 20th September, 2002, 12:58 PM
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3D Glasses do work - I have a pair of ELSA revelators, coupled with a GeForce 4 card. You need a CRT monitor that does AT LEAST 100Hz refresh rate, preferably 120Hz.

It also helps to have a darkened room, so the monitor surround isn't well lit. This is because your brain can get very confused when it sees that the image projected from the monitor is at a different depth to the monitor surround. This affects things coming out of the screen much more than things inside the screen! In addition, different people see in 3D differently, so there are a couple of settings you need to tune up in order to maximise the effect for your person. I have seen some images that I would class as unviewable for me (due to seperation), but looked fine to the person who originally set the system up.

nVidia's drivers support 3D glasses/3D monitor natively, so any program that supports OpenGL or Direct3D can drive the 3D glasses. As both OpenGL and Direct3D require a Z plane, the nVidia drivers can calculate the correct offset to use. This means that the 3D you see is actually based on what OpenGL or Direct3D are using. Hence the 3D is real.

nVidia's drivers work by calculating two different viewpoints, and switching scenes during the VSync. This means you MUST have VSync enabled. Benchmark your card with VSync enabled, and then halve the result. This gives an idea as to what resolution you can expect to run with 3D glasses or a 3D monitor. I have personally run 800x600 on a GF2MX without a problem.

As the VSync switching is timing sensitive, some device drivers are known to cause timing problems. IDE RAID drivers are known for causing problems!
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Old 20th September, 2002, 05:27 PM
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I'm confused a bit now. Are the glasses you are talking about dependant on the monitor for resolution? The ones I've tested require no monitor support at all. You don't need a monitor, only the glasses to view through.

I think AdianII may be touching an area I am unfamiliar with, so heed his advise well. I have never tested a set reliant on the monitor before :-/
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Old 20th September, 2002, 06:21 PM
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How about ati? I have a radeon 9000, just sold the gf2 mx. The whole thing doens't sound too good anyway.
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Old 20th September, 2002, 08:18 PM
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Quote:
Originally posted by unclemojo
I'm confused a bit now. Are the glasses you are talking about dependant on the monitor for resolution? The ones I've tested require no monitor support at all. You don't need a monitor, only the glasses to view through.

I think AdianII may be touching an area I am unfamiliar with, so heed his advise well. I have never tested a set reliant on the monitor before :-/
what he's talking about are the 3d glasses that work off your screen itself. those are the ones you see packaged with some of the video cards out there. Remeber those cheap glasses you put on from cereal boxes and stuff? same idea.
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Old 21st September, 2002, 03:32 AM
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ahhhh, OK, now I get it. Yeah, I've never tested them. I've only tested the 3D eyeware alone without monitor support. Might work a lot better though, since it uses the mon for extra kuice. All I've tested have looked like booty
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Old 21st September, 2002, 03:46 AM
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Interesting.. I have a new card I just bought for my daughter... ECS SiS315, it has a port for 3d glasses. I've never given it a second thought until now. hmm...

AidanII, is this the kind of set up you're talking about, where the glasses connect to a video card that supports it?
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Old 21st September, 2002, 06:10 AM
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there a two main ways to render a 3d screen: a red-blue glasses! hard on the eyes but cheap and fairly easy on the hardware and pocket. the other way is to keep two pictures of the screen that are offset according to depth (close objects are more offset and far objects are barely offset) and cycle between them, then using special glasses blind your left or right eye (like a shutter; or like a digital clock) in sync with the two images.

i've also seen a 3rd way but i dont think you could do it with any home equip: it was at the spiderman ride in islands of adventure FL. i think they used polarized glasess and projected two different polarized images; but i'm not sure)
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Old 22nd September, 2002, 08:30 PM
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Yes, I went and looked up the EDimensional glasses after Stigweed posted. They're LCD shutter glasses.

SteveI: Some graphics cards have a dedicated connector. Most nVidia cards don't, but nVidia has adopted ELSA's DCC triggering standard. This uses one of the DCC channels to switch panels on the glasses, so the glasses have a connector that goes between the VGA connector on the gfx card, and the VGA connector on the monitor lead.

Drow_Elf: Indeed, you're correct about all three ways of generating stereoscopic images. The third way is indeed to use two projectors (or a specialist stereoscopic projector) with opposing polarisers and polarised glasses for viewing. This requires a special screen to project onto however, as projecting into a standard screen will screw up the polarisation!


NB: The nVidia drivers (30.82) currently support BOTH Red-Blue and LCD shutter glasses. In order to activate this feature, you have to download the stereoscopic add-on to add this feature into the nVidia drivers. These can be found under "Games, Utilities and Tools" then "Consumer 3D Stereo".

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Old 22nd September, 2002, 09:15 PM
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Can't I just get optic nerve connection implants? Plug myself right in to the analog output?
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Old 22nd September, 2002, 11:34 PM
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I rather like the idea of being jacked in also
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