FacebookTwitter
Hatrack River Forum Post New Topic  Post A Reply
my profile login | register | search | faq | forum home

  next oldest topic   next newest topic
» Hatrack River Forum » Active Forums » Books, Films, Food and Culture » Technos, need info please...

   
Author Topic: Technos, need info please...
Cashew
Member
Member # 6023

 - posted      Profile for Cashew   Email Cashew         Edit/Delete Post   Reply With Quote 
Does anyone know how possible it is to have animated skins on 3d objects, generated from within the object itself. (As I write this, the thought that immediately comes to mind is, Well duh, sounds like a tv set.)
What I'm thinking about is, for example, a guitar that is capable of generating animated images on its surface as it's being played. Has anybody heard of this, or know whether its technologically practical?

Posts: 867 | Registered: Dec 2003  |  IP: Logged | Report this post to a Moderator
NotMe
Member
Member # 10470

 - posted      Profile for NotMe   Email NotMe         Edit/Delete Post   Reply With Quote 
Well, there are things like flexible OLED displays. They have longevity problems, and the flexible things aren't too durable, but it might work for what you have in mind.
Posts: 145 | Registered: Apr 2007  |  IP: Logged | Report this post to a Moderator
fugu13
Member
Member # 2859

 - posted      Profile for fugu13   Email fugu13         Edit/Delete Post   Reply With Quote 
Yes, it is definitely possible. No, it is not cheap.
Posts: 15770 | Registered: Dec 2001  |  IP: Logged | Report this post to a Moderator
Cashew
Member
Member # 6023

 - posted      Profile for Cashew   Email Cashew         Edit/Delete Post   Reply With Quote 
Thanks guys, it's just an idea that occurred to me while I was talking to one of my design students. Just wondering. I would guess that it would be super expensive. The display wouldn't need to be flexible but would need to be incorporated into the body of the object it was applied to.
Posts: 867 | Registered: Dec 2003  |  IP: Logged | Report this post to a Moderator
Earendil18
Member
Member # 3180

 - posted      Profile for Earendil18   Email Earendil18         Edit/Delete Post   Reply With Quote 
Technically, techno is a term referring to a particular style of electronic music.

I'm sure you meant "techies" tho. [Wink]

/geek

Posts: 1236 | Registered: Mar 2002  |  IP: Logged | Report this post to a Moderator
Cashew
Member
Member # 6023

 - posted      Profile for Cashew   Email Cashew         Edit/Delete Post   Reply With Quote 
Thanks Earendil, not being one of either category I mighta guessed I'd get it wrong.
Posts: 867 | Registered: Dec 2003  |  IP: Logged | Report this post to a Moderator
Wonder Dog
Member
Member # 5691

 - posted      Profile for Wonder Dog           Edit/Delete Post   Reply With Quote 
Ummm... besides expensive light-emitting materials, has your student thought about using projection? It might not give the effect you want, but it's cheap and might work well with stationary/slowly moving objects.
Posts: 353 | Registered: Sep 2003  |  IP: Logged | Report this post to a Moderator
aspectre
Member
Member # 2222

 - posted      Profile for aspectre           Edit/Delete Post   Reply With Quote 
No problemo. Just use a DigitalLightProjection system in a hollow-bodied guitar with a translucent surface.
Posts: 8501 | Registered: Jul 2001  |  IP: Logged | Report this post to a Moderator
Cashew
Member
Member # 6023

 - posted      Profile for Cashew   Email Cashew         Edit/Delete Post   Reply With Quote 
Interesting, aspectre. How about in a solid-body guitar?
Posts: 867 | Registered: Dec 2003  |  IP: Logged | Report this post to a Moderator
El JT de Spang
Member
Member # 7742

 - posted      Profile for El JT de Spang   Email El JT de Spang         Edit/Delete Post   Reply With Quote 
quote:
Originally posted by aspectre:
No problemo. Just use a DigitalLightProjection system in a hollow-bodied guitar with a translucent surface.

Several problemos:

Name me a translucent material that would make for a decent guitar body,

and name me a DLP application that can function in <4-6 inches of space with any sort of resolution.

Posts: 5462 | Registered: Apr 2005  |  IP: Logged | Report this post to a Moderator
Wonder Dog
Member
Member # 5691

 - posted      Profile for Wonder Dog           Edit/Delete Post   Reply With Quote 
That's why you do external projection. (ie. Coat the guitar with reflective paint, Shine a projector on it from 30 feet away - heck, shine 4 projectors on it if you want all four sides.)

There are obvious shadow issues if anything (including a performer) is inbetween the projector and the guitar, but if there's nothing inbetween, it can be quite effective. Also, if the guitar is moving in an irregular way, track it with an IR cam (or something like it) and have your projector hooked to software that draws the overlay from the tracking data.

If this all sounds too crazy, check out what's been done here with a (somewhat) similar setup and a little language called Processing.

http://portfolio.barbariangroup.com/nextfest/index.html

http://portfolio.barbariangroup.com/nextfest/video.html

Posts: 353 | Registered: Sep 2003  |  IP: Logged | Report this post to a Moderator
NotMe
Member
Member # 10470

 - posted      Profile for NotMe   Email NotMe         Edit/Delete Post   Reply With Quote 
In a solid body guitar, you could just have the top be an LCD or have it studded with LEDs. Depending on what kinds of graphics you want, this could be done pretty cheaply.
Posts: 145 | Registered: Apr 2007  |  IP: Logged | Report this post to a Moderator
aspectre
Member
Member # 2222

 - posted      Profile for aspectre           Edit/Delete Post   Reply With Quote 
Yep, an LCD screen could easily be embedded into a guitar's face. Then a plexiglass shield over it to lessen the possibility of breakage during play.
Problem being it would be rectangular, wouldn't cover the entire face.

The LEDs alone would be ridiculously expensive for anything approaching a decent display resolution. 50X50 resolution would reqire 2500LEDs times 4 -- three primary colors, and one color (I think red) requires two LEDs to match the brightness of one LED of the other colors -- for 10,000LEDs. And ya don't even wanna think about the headache of wiring those suckers to a controller.

Clear acrylic solid-body guitars have been around for nearly as long as electrics.
Since the direction of light's travel bends each time it passes through the surface between two materials in accordance to Fermat'sLeastTimePrinciple, and the light will be traveling through such surface(s) -- air-to-solid (and solid-to-air) -- the surface of the hollow containing the DLP will have to be precision ground into a rather sophisticated curve to bend the light to go where it should on the guitar face. And the DLP will have to precisely placed within that cavity.
Neither impossible nor absurdly expensive, but a difficult enough engineering challenge. ie Not a "let's just cobble this together" project; but something that could be done by a dedicated amateur astronomer who grinds his own lenses&mirrors. The more distortion one is willing to accept on the display surface, the easier it will be to do.

A 50inch-diagonal DLP television has a depth of 6&7/8ths inches. Proportionally, a 20inch-diagonal guitar face should should need a depth of 2&3/4ths inches.
The frame of the hollow-body should be strong enought to allow nearly any material to be draped/stretched across a face. The limiting factor will be the desirability of the resonances produced: which is a matter of "taste", of ear; which can be extensively modified through electronic-processing in an amplified system.
Not sure, but I'd suspect that the material used for DLP screens is tightly stretched across the tv frame.
I'd try stretching&gluing the DLPscreen material onto quarter-inch plexiglass beforehand, then place the shaped&joined material into the front edge of the frame with the plexiglass as the outside surface.
Definitely want LEDs or laser diodes as the light source. With fan. Otherwise the DLP display would run way too hot.

[ June 24, 2007, 07:50 PM: Message edited by: aspectre ]

Posts: 8501 | Registered: Jul 2001  |  IP: Logged | Report this post to a Moderator
   

Quick Reply
Message:

HTML is not enabled.
UBB Code™ is enabled.
UBB Code™ Images not permitted.
Instant Graemlins
   


Post New Topic  Post A Reply Close Topic   Feature Topic   Move Topic   Delete Topic next oldest topic   next newest topic
 - Printer-friendly view of this topic
Hop To:


Contact Us | Hatrack River Home Page

Copyright © 2008 Hatrack River Enterprises Inc. All rights reserved.
Reproduction in whole or in part without permission is prohibited.


Powered by Infopop Corporation
UBB.classic™ 6.7.2