| Author | Message | ||
     Thorsten Fuehrer Rating: N/A |
Hi! I'm searching for a free video driver for my GeForceMX with a build in Stereo-function. The driver should only render the stereoscopic image and don't do any syncronization (except that after every v-sync the image for the next eye is drawn) I own a Revelator and use the Elsa-generic drivers at the moment, but I don't like the DDC sync of the revelator. I'm going to sync the glasses via loop-through vsync detection or maybe via serial port. So I don't need to use the revelator driver any longer and now I search for a similar one without the sync via DDC. | ||
| Andreas Schulz Rating: N/A |
Welcome to the club! I'm afraid you will have to wait until NVidia has decided when (or even - if ?) they add stereo to their Detonator drivers. ELSA drivers will work perfectly with an external VSync adaptor (and are the only with full-resolution page-flip rendering). Only other stereo drivers are Wicked3D, which renders half-screen for sync-doubling, and VRCaddy, which renders either half-resolution page-flip or interlaced. Both are not free. BTW: Check http://www.stereovision.net - AFAIR, someone there had some success with T&L mode and the ELSA stereo drivers. | ||
| Thorsten Fuehrer Rating: N/A |
Thanx for the information. I can imagíne that ELSA drivers work perfectly, but they produce a very heavy IRQ load wich leads to a big performance hit, since the DDC is controlled by an IRQ as far as I know. In addition I have some probs with my SB Live (esp. EAX). The goal in building my own loop through is trying to avoid ghosting, coz I think that the DDC'S 5V aren't enough to darken the LCDs perfectly. Maybe I even could drive them at 10V. The next step is to modificate the circuit of the Loop-Through and add a feature which allows the glasses to "fade" from black to clear - best at the same speed the phosphor illuminates. This produces darker images, but there is brightness and gamma correction... PS: How well work the other drivers? Any experiences??? PPS: Does Anybody know something more precious about NVidia's attempt? to build in stereo??? | ||
| Andreas Schulz Rating: N/A |
DONT feed 10V into the Revelator's DIN3 plug ! - This may easily burn all of the smoke out of the driving circuit. Note that the input signal to the DIN3 connector is a TTL-level square wave, where 'Hi' means left and 'Lo' right (or the other way), which is converted into something more complicated by the driver circuit to drive the LCD panels (probably already including a voltage doubler also). So there is no much space for tweaking left at this point. The performance hit is mostly due to the fact that twice as much images have to be rendered (one per eye), and is almost identical for all drivers. Main problem with the IRQ would be glasses flashing, caused by the IRQ not getting through (at least not in proper time), e.g. when blocked by soundcard IRQs. There is definitely no reason for 'fading' the panels - that's already done (more than anyone would like) by the panels themselves and attributed as 'slow response time'. | ||
| Thorsten Fuehrer Rating: N/A |
Nice to know, thx! The idea off building my own "tweaked" loop-through just came because I encounter VERY heavy ghosting. I have a Belinea 106080 with P22 Phosphor. It can run up to 160Hz 800x600, but I use only 140Hz. Decreasing the VSync does not produce less ghosting, and also decreasing the monitor's contrast does not change ANYthing. I don't know how much ghosting is normal, but it's to much to get a good 3D-feeling. BTW: where can I find the "driver circuit" you're talking about? If I could bypass it, I could a least try to use a bit higher voltage or figure out the "fading". Maybe the "slow response time" is not "slow" enough? | ||
| Andreas Schulz Rating: N/A |
P.S: (Also to Christoph) I'm not sure how long NBCI.COM will redirect XOOM links, so better update links to my homebrew controller page to http://members.nbci.com/_XMCM/a_r_schulz/index.htm | ||
| Andreas Schulz Rating: N/A |
Looks like I left that message editor open for some time, so I missed the response... Just forget about that fading - it won't take you anywhere. Just think of how a monitor works - each scanline is drawn every ~5-10msec. If the phosphor is fast, the image from the previous scan is gone. If it's slow, you have ghosting. Try to reduce your refresh rate to ~120Hz and see if it helps. Fading will only give you dark (fading) bars on the top and bottom screen edge. The driver circuit is in the small box sitting on the cable for the wired version and built into the glasses for the IR version. If you want to play around with your own circuits, better try to get some cheap old Cyberboy or Miro Fanatix at ebay - they give you direct connection to the LCD panels. | ||
| Eric M. Lindstrom Rating: N/A |
Same thing with VRJoy/VRJoy2000 glasses. the LCD drivers are in the controller, not the spex. BTW Is there any place that I can get my own LCD panels to make my own glasses? If so, let me know! -Eric L. |
