POV-Ray : Newsgroups : povray.binaries.images : They just stare right back (i.e. CG eyes) Server Time
15 Nov 2024 16:17:10 EST (-0500)
  They just stare right back (i.e. CG eyes) (Message 1 to 3 of 3)  
From: Nimish Ajmani
Subject: They just stare right back (i.e. CG eyes)
Date: 18 Feb 2008 22:10:00
Message: <web.47ba478482c4a17e835874580@news.povray.org>
Well, the goal is to begin a long project of become a human animator.  And,
seeing as how the eye is one of the most important, and admittingly the most
simple part to program, I thought I'd make a pair of eyes.  This is a result of
a hour's studying, close examination of my own eye, and some simple modeling.  I
put two next to each other to give the idea of actually seeing something.

The brown "eyelids" are only present to show the blinking motion.  They will be
replaced later with a CG model of a human face.  The actual eye is the most
important part here.  Suggestions on improvement, or just comments, are greatly
appreciated.

I used a trignometric function to make the eyes stare at a specific point, in
this case, the camera.


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Attachments:
Download 'eye.bmp' (577 KB)

From: triple r
Subject: Re: They just stare right back (i.e. CG eyes)
Date: 18 Feb 2008 23:00:00
Message: <web.47ba5402fd0f3d96ae42298f0@news.povray.org>
"Nimish Ajmani" <nomail@nomail> wrote:
>
> The brown "eyelids" are only present to show the blinking motion.  They will be
> replaced later with a CG model of a human face.  The actual eye is the most
> important part here.  Suggestions on improvement, or just comments, are greatly
> appreciated.
>
> I used a trignometric function to make the eyes stare at a specific point, in
> this case, the camera.

Not bad.  We should talk...  I think this will be one of my next projects too.
Anything on the face is very difficult since we see it so often.  Maybe some
blobs to cut down on the sharp edge, but I think the main thing is that the
blue part needs a little more 'depth'.  Here's a page that goes through some
tricks to add realism:

http://www.andrew-whitehurst.net/eyeTut.html

As for the rotation, probably the most efficient way would be with a matrix
transformation:

http://www.geocities.com/evilsnack/matrix.htm

Should be the most general and simple; it's just a matter of figuring it out.
Oh, and FYI it's probably more efficient to post a jpg rather than a bmp.  All
the same to me, but someone must be paying the bill for bandwidth.  Keep it up
though.  A good pair of eyes can add a lot of realism.

 - Ricky


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From: Alain
Subject: Re: They just stare right back (i.e. CG eyes)
Date: 19 Feb 2008 14:17:32
Message: <47bb2b4c$1@news.povray.org>
Nimish Ajmani nous apporta ses lumieres en ce 2008/02/18 22:08:
> Well, the goal is to begin a long project of become a human animator.  And,
> seeing as how the eye is one of the most important, and admittingly the most
> simple part to program, I thought I'd make a pair of eyes.  This is a result of
> a hour's studying, close examination of my own eye, and some simple modeling.  I
> put two next to each other to give the idea of actually seeing something.
> 
> The brown "eyelids" are only present to show the blinking motion.  They will be
> replaced later with a CG model of a human face.  The actual eye is the most
> important part here.  Suggestions on improvement, or just comments, are greatly
> appreciated.
> 
> I used a trignometric function to make the eyes stare at a specific point, in
> this case, the camera.
> 
> 
> ------------------------------------------------------------------------
> 
The iris look like they are ON the cornea, not behind it. They also have a 
radial pattern and some irregularities. It's the most critical part in having 
convincing eyes. Also, the surface of the eye have a transparent layer covering it.

-- 
Alain
-------------------------------------------------
A lack of leadership is no substitute for inaction.


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