metamaterials / negative index of refraction

oodmb · Post by **oodmb** » Sat Jan 20, 2007 5:43 pm

hey, while indigo 7 is still in its betta stages, i was wondering if you could add the ability to put in a negative refraction? please? i know this might sound stupid, but currently there has been lots of talk about metamaterials and there effect, and i think it would be realy cool to be able to simulate its effect in a renderer. i have no idea how hard it would be to allow it, if its just dissabling a block on negative refraction indexes, or adding a whole new code, but whatever it is, it would be realy cool, and might turn out to be usefull, like for hiding part of an object with a cloth, but it being visible from the other side of the cloth and cool stuff like that.

Post by **OnoSendai** » Tue Jan 30, 2007 11:37 pm

I suspect the relevant equations might blow up if I tried to do this

BBjam · Post by **BBjam** » Tue Feb 20, 2007 5:39 am

Meta-materals are sooooooooo coooool!!!!

Kram1032 · Post by **Kram1032** » Tue Feb 20, 2007 5:49 am

I've never heard about something like MetaMats...
(Before, I saw this thread

)
Can anyone post example pics?

Deus · Post by **Deus** » Tue Feb 20, 2007 6:13 am

I have a fix for you sir.

Just embed entire world in a big cube with low precedence and IOR 10

Then you go ahead and place other items with lower refraction in the world.

In practice (if Ono did his homework) it will behave like "negative" index of refraction

/ D

CTZn · Post by **CTZn** » Tue Feb 20, 2007 7:42 am

Someone said, that something would go wrong if camera was into a medium, is this confirmed ?

Deus · Post by **Deus** » Tue Feb 20, 2007 10:19 am

I was into a medium once. She said I would meet a switft and cruel death.

(Seriously. I think refraction code is wrong when light leaves a medium)

oodmb · Post by **oodmb** » Tue Feb 20, 2007 2:15 pm

i think the problem with putting the whole world inside a medium of ten is that the camera's lense still has an ior relitive to air, thus the medium would look like any other with an index of 10, and be reflective.
real metamaterials are in early development stages and thus any picture you find will be a fraud. currently they only work for light outside of the visible spectrum. there is some stuff about them on the MIT website. maybe in 20 years they will become a reality, and if indigo is still around by then, in order to stay unbiased, it will have to simulate them

IanT · Post by **IanT** » Fri Feb 23, 2007 8:35 am

OnoSendai wrote:I suspect the relevant equations might blow up if I tried to do this

Yeh, I've just checked ... conventional fresnel equations would go a big fat BOOM

Ian.

Deus · Post by **Deus** » Fri Feb 23, 2007 11:02 pm

The camera in indigo does not have a lens duh. Its fake. Ask Ono

Post by **OnoSendai** » Fri Feb 23, 2007 11:12 pm

It's a thin lens model

eman7613 · Post by **eman7613** » Mon Feb 26, 2007 10:49 am

Deus wrote:The camera in indigo does not have a lens duh. Its fake. Ask Ono

OnoSendai wrote:It's a thin lens model

wtf pwnd

Deus · Post by **Deus** » Mon Feb 26, 2007 9:12 pm

A thin lens "model" means its actually not a lens in there.

From Wikipedia, the free encyclopedia

Model, models, or modeling may refer to: a pattern, plan, representation, or description designed to show the structure or workings of an object, system, or concept.

So i am not pwned. Thank you

eman7613 · Post by **eman7613** » Tue Feb 27, 2007 3:00 am

Deus wrote:A thin lens "model" means its actually not a lens in there.

From Wikipedia, the free encyclopedia

Model, models, or modeling may refer to: a pattern, plan, representation, or description designed to show the structure or workings of an object, system, or concept.

So i am not pwned. Thank you

anyone else not see how that proves his point? Plus, no offense, but id rather belive the write of the program, just me.

StompinTom · Post by **StompinTom** » Tue Feb 27, 2007 3:15 am

well since the whole idea behind 3d modelling is to create models then everything were doing is fake, right? damn. weve been living a lie.
what is a 3d model if nothing more than an abstract representation of digital information? of course computer graphics are "fake".
now whether or not they represent the physical world in a "realistic" manner is a different story.

metamaterials / negative index of refraction

metamaterials / negative index of refraction

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