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1  General Category / Forum news / Re: And we're back in the room on: October 03, 2016, 09:14:23 AM
Yep, I have local copies of everything, plus the server is backed up by the host. 
It's a semi-manual process copying them locally mind, I must look into automating that.
2  General Category / Forum news / And we're back in the room on: October 01, 2016, 10:15:33 PM
The forum was down for a few hours there.
I fixed it as soon as I found out.  There was a corruption in the settings file, could be a hack attempt perhaps, I'll keep an eye on things and see if I can beef up security.
3  General Category / Can't stop building / Re: So where can I get ... on: December 14, 2015, 04:07:40 PM

I just read that apparently UV light wrecks the liquid crystal, which is why LCD polarisers are also UV filters.
4  General Category / Can't stop building / Re: So where can I get ... on: December 14, 2015, 02:10:25 PM
Nice video, I dare you to give it a go! Wink

I actually have tried this some time back when I had the idea of replacing the ccfl backlight with uv leds. I wanted to use the screen to expose photoresist for making my own pcbs, I wanted to remove the film on the screen to let more light through, seems like a silly idea now though.

So you expose the PBC using an image on the screen?
5  General Category / Can't stop building / Re: So where can I get ... on: December 14, 2015, 09:51:07 AM
I meant the other way round, the polariser is on the camera side. So the front gathers the polarised spec + unpolarised diff and delivers it to the polariser on the back. 
So whether the spec gets through depends on the twist state.

We tried using a monitor as a polarised light source just to get a proof of concept for the whole thing. It worked (of course) but wasn't very bright, so we'll need some bright lights and some polar film.
I've found a place in the states that's the cheapest source I can find without buying bulk quantities, though there were a few places on alibaba/ali express that did a 10 pack of ipad sized sheets for a few dollars a sheet.

There was also a vendor selling 300m rolls of the stuff but that's probably 299.5 m too much and besides it weighed something like 400kg so shipping and handling would be a problem. Wink,
6  General Category / Can't stop building / Re: So where can I get ... on: December 13, 2015, 09:37:15 PM
If my thinking is right you'd only need to get one polariser off.
You'd present the polarised side to the lens, If you take a shot with the screen off then your get 0 degrees, with the screen on then it gives the light a twist on the way through and you get the 90 degrees.

I was thinking of getting some cracked lenses to strip the polariser off to put over the lights,  it is do-able with a blunt knife, but you can get raw polariser from china or the States for about the same as a broken panel and it's not wrecked.

I may be stripping a couple of laptops before I bin them at some point so I might try it on one of those to see how it works.

7  General Category / Can't stop building / Re: So where can I get ... on: December 13, 2015, 05:45:27 PM
https://www.youtube.com/watch?v=a4cnrPMo6_s
 Grin

Dammit I've also just found out you can get conductive coated glass on ebay. and recent experience tells me it's not that hard to split a screen and get the liquid out.
The glass is expensive though, (£35 for a 100mm square piece) but I'd love to do it just to try it out.


Also as an aside I've finally got myself a 20" screen cheap, It's an apple screen so used the TMDS signal format and not LVDS. At first I though it was a completely different thing so I'd have to hunt for a board to support it, turns out it's basically DVI with different pin arrangement so just a cable will do it, If I also replace the CCFLs with LEDs then that's even easier and there's less interference producers in the box.  I can even power it from an external 12/5v supply Smiley  

8  General Category / Can't stop building / Re: So where can I get ... on: December 13, 2015, 03:04:31 PM
Having done some googling LCD shutters are available in welding masks.
http://www.ebay.co.uk/itm/Auto-Solar-Darkening-LCD-Welding-glasses-Welding-Mask-Welding-Goggles-Helmet/291552735881?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D33984%26meid%3Dfa31af4575a54303a065885f35c989bf%26pid%3D100005%26rk%3D3%26rkt%3D6%26sd%3D271361197325
But I guess that's a different thing they're doing.

 Aerendraca - I don't get why it would need two screens? Surely the crystal either gives the light a twist or not?
I'm having trouble visualising it.

9  General Category / Can't stop building / Re: So where can I get ... on: December 11, 2015, 02:52:16 PM
It needs to be big enough to fit in front of a camera lens so 100 - 150mm square would more than cover it.
I could do with being able to switch the polariser through 90 degrees without touching the camera.

Here's the thing, if you have a polarised light source and a filter over the lens you can get a true shot of the albedo colour of a surface, rotate 90 degrees and you can get the specular reflectance values.  If you do it with four cunningly positioned lights you can also (with a bit of processing) get a surface height description or normal map. This gives you everything you need to create a physically accurate material in-game (which is the big thing at the moment).  I've seen ghetto versions using the lenses from 3d glasses, one over the flash and one over the lens, but i have a hankering for something more accurate than physically rotating a filter.

There's some examples here:
http://filmicgames.com/archives/233

It's an extension of this sort of thing:
https://www.youtube.com/watch?v=_wIgmEch1P8
10  General Category / Can't stop building / So where can I get ... on: December 11, 2015, 12:02:52 PM
I need a polarising filter that can change direction on a simple switch.
Where can I get a smallish LCD panel without the polarising film? Preferable something where the whole panel will switch on and off on a single line without having to drive an lvds board?
At a push we could use a cheap laptop to run the dewice, so could drive it as if it's an external screen at a push, I'd kinda like to avoid that though.

11  Screen Tablet malarky / Tutorials and useful knowledge / What monitor has what panel? on: December 09, 2015, 02:20:50 PM
Useful list of what monitors use which panel sorted by size.
http://lcdtech.info/en/data/lcd.panels.in.monitors.htm

Or if you're looking for a particular panel you can click through and get what other monitors use that panel.
http://lcdtech.info/en/data/lcd.panels.in.monitors.htm?pan=LM201W01

There's a list of laptops too

12  Screen Tablet malarky / Build Logs / Re: Exotiq Redux 21.5" IPS + Intuos3 on: December 02, 2015, 03:07:24 PM
Quote
OK, I'm open to suggestions for a matte 'screen protector' solution

http://www.ebay.co.uk/itm/171881430632?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT

21.5Inch Resistive Touch Screen Panel 490x285mm 4Wire USB kit for 21.5" monitor   Grin
13  Screen Tablet malarky / Build Logs / Re: Exotiq Redux 21.5" IPS + Intuos3 on: November 19, 2015, 02:22:52 PM
OK -so I had to delete the attachments to get the thread working again. There were a couple of possible issues, there were two with the same name (I don't think this is the problem as the names get hashed in the database, but perhaps the attachmant script doesn't like it), the big one was missing it's thumbnail, which might perhaps have been a busy server thing.   

Can you do the attachments again Meta? It might be work making the 4k-wide one a bit smaller just in case that was causing it to choke.

Right - As you were Smiley
14  General Category / Forum news / Re: bad thread on: November 19, 2015, 02:10:12 PM
Thread now working but without attachmants. I think I know which is the bad one
15  General Category / Forum news / bad thread on: November 19, 2015, 07:58:14 AM
Just to let you know I am looking at Metapharsicals build thread trying to figure out why page two is whiting out.
Not my field really, but, it's nothing to do with the message contents. I'll look at attachments next,  It might be a script throwing a fit trying to process them, there was one that was BIG.
Doing a "view source" gets -NOTHING- back so no clues there.
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