Has anyone seen this "picture-in-picture" technique used before?  I haven't,
but I've only been raytracing for about a year or so.  I'd like to think I
invented it, but I may have to settle for "independent discovery" of it.

Try to ignore the noise on the couch - I was playing around with the
roughness to try to keep it from looking like plastic clay and I forgot to
fix it before running the anmiation.

What do you think?

Mike Sobers

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Attachments:
Download 'TV.mpg' (321 KB)

I remember a discussion of this back not long after pov 3.0 came out.  I 
think the idea was to extract frames from your animation to embed and 
number them in sequence, then use pov script to build the filename of the 
image to use for your image_map based on the value of clock.

What was your approach?

Ken

Michael Sobers wrote:

> Has anyone seen this "picture-in-picture" technique used before?  I
> haven't,
> but I've only been raytracing for about a year or so.  I'd like to think I
> invented it, but I may have to settle for "independent discovery" of it.
> 
> Try to ignore the noise on the couch - I was playing around with the
> roughness to try to keep it from looking like plastic clay and I forgot to
> fix it before running the anmiation.
> 
> What do you think?
> 
> Mike Sobers
> 
>

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> What was your approach?

yes please do tell !!!

(nice choice of video tho - airwolf is cool)


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"Michael Sobers" <mic### [at] mindspringcom> wrote in message
news:3a1d466b@news.povray.org...
><snip>
>What do you think?

I've done a similar thing before, loading consecutive frames of a previously
rendered pov animation into a new pov animation.

This would be great if you placed a light source inside the TV, then gave
the Airwolf images a filter value, and the room a global scattering media.
Or maybe use radiosity and give the screen a high ambient value, so that the
screen illuminates the room depending on the image being displayed at any
moment.

It might take a while tho.. :-)

Andy Cocker.

---------------------------------------------------------------
www.mariner9.net

..... for my music and graphics.
---------------------------------------------------------------
'I spilled spot remover on my dog. He's gone now. '
'I went to a restaurant that serves "breakfast at any time."
So I ordered french toast during the Renaissance. '

 - Steven Wright.

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There was even a very robust "movie mapper" (?) inc file some time back. I
will try to find it. Clearly not a new technique, but effective nonetheless.
d.

"Andy Cocker" <big### [at] mariner9fsnetcouk> wrote in message
news:3a1dd960@news.povray.org...
> "Michael Sobers" <mic### [at] mindspringcom> wrote in message
> news:3a1d466b@news.povray.org...
> ><snip>
> >What do you think?
>
> I've done a similar thing before, loading consecutive frames of a
previously
> rendered pov animation into a new pov animation.
>
> This would be great if you placed a light source inside the TV, then gave
> the Airwolf images a filter value, and the room a global scattering media.
> Or maybe use radiosity and give the screen a high ambient value, so that
the
> screen illuminates the room depending on the image being displayed at any
> moment.
>
> It might take a while tho.. :-)
>
> Andy Cocker.
>
> ---------------------------------------------------------------
> www.mariner9.net
>
> ..... for my music and graphics.
> ---------------------------------------------------------------
> 'I spilled spot remover on my dog. He's gone now. '
> 'I went to a restaurant that serves "breakfast at any time."
> So I ordered french toast during the Renaissance. '
>
>  - Steven Wright.
>
>

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"Michael Sobers" <mic### [at] mindspringcom> wrote in message
news:3a1d466b@news.povray.org...
> Has anyone seen this "picture-in-picture" technique used before?  I haven't,
> but I've only been raytracing for about a year or so.  I'd like to think I
> invented it, but I may have to settle for "independent discovery" of it.

Guess you'll have to call it "Old Technique"  :-)
I have a include file also which does this.  Not terrificly, but it does.  It's at
http://members.aol.com/xyzunknown/private/inxframe.zip

> Try to ignore the noise on the couch - I was playing around with the
> roughness to try to keep it from looking like plastic clay and I forgot to
> fix it before running the anmiation.

Not easy to ignore that, I thought it was a indoor pool at first.
A movement of the scene as a whole would add to it.

Bob

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"Ken Cecka" <cec### [at] homecom> wrote in message
news:3a1d5ef9@news.povray.org...
> I remember a discussion of this back not long after pov 3.0 came out.  I
> think the idea was to extract frames from your animation to embed and
> number them in sequence, then use pov script to build the filename of the
> image to use for your image_map based on the value of clock.
>
> What was your approach?
>
> Ken
>
Here's the code:

#declare screen = concat("filename",str(frame,-3,0),".png")

where "frame" is a counter tied to the clock variable so that it increments
once for each frame rendered.  This gives "screen" the value
"fliename###.png" where the ### is incremented each frame.  The -3,0 forces
"screen" to have three numbers (and no decimal places).  You can use any
sequence of frames with any filetype POV recognizes. Now if you can only
finde some sequentially-numbered files :) you'll be all set.

Then:

pigment { image_map { png screen }
     translate <width/2, -height/2, 0>
}

so the image "screen" is mapped to the TV screen (width and height are
variables in my TV macro).

That's it!

- Mike

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> >What do you think?
>
> I've done a similar thing before, loading consecutive frames of a
> previously rendered pov animation into a new pov animation.

Or, what about using the previously rendered frame of the current
animation.  You could have some cool and weird feedback effects! :)

--
Jonathan Hunt
jon### [at] xlcuscouk
http://www.xlcus.co.uk/povray/

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