Michele Verità

dear all here are some nice pictures showing 3d transformation and video processing done with vvvv, i would like to understand how i can achieve this in jitter..

http://www.onoxo.net/clean_exp/clean_exp.php

http://www.onoxo.net/pipet_filters/pipet_filters.php

dear all here are some nice pictures showing 3d transformation and video processing done with vvvv, i would like to understand how i can achieve this in jitter..
thanks a lot
michele

http://www.onoxo.net/clean_exp/clean_exp.php
http://www.onoxo.net/pipet_filters/pipet_filters.php


how-can-i-get-it-in-jitter

I've looked at some of the videos on that site. Not only are the

images not initially erased (allowing the picture to create those 3d

forms) but it seems that part of the image is able to be wiped away at

http://www.onoxo.net/clean_exp_m/clean_exp_m.php

setting a low erase value (or value of 0) in the alpha channel will

leave a trail of the image as it's moved through space, but how could

the image trail be erased at a later time without effecting other

I've looked at some of the videos on that site.  Not only are the
images not initially erased (allowing the picture to create those 3d
forms) but it seems that part of the image is able to be wiped away at
a later time.

setting a low erase value (or value of 0) in the alpha channel will
leave a trail of the image as it's moved through space, but how could
the image trail be erased at a later time without effecting other
parts of the image that it may overlap?

Bryan
-- 
http://www.bryanteoh.com
http://www.icelu.net
http://www.ksod.net


Perhaps by not actually having anything to do with erasing. My guess

would be that there's a 3D pbject (possibly stored as a display list)

that is drawn 1 to N number of times with slightly different rotation

and translation parameters. At time t=0, there is only one object.

As time increases, there will be say 20 object( a max). Then there's

a corresponding ramp down where the 20 objects go down to 1 with the

ones in back droping off first. Seems like you could do with with JS

and a variably sized FIFO buffer of translate rotate transformations.

> I've looked at some of the videos on that site. Not only are the

> images not initially erased (allowing the picture to create those 3d

> forms) but it seems that part of the image is able to be wiped away at

> setting a low erase value (or value of 0) in the alpha channel will

> leave a trail of the image as it's moved through space, but how could

> the image trail be erased at a later time without effecting other

> parts of the image that it may overlap?

Perhaps by not actually having anything to do with erasing.  My guess
would be that there's a 3D pbject (possibly stored as a display list)
that is drawn 1 to N number of times with slightly different rotation
and translation parameters.  At time t=0, there is only one object.
As time increases, there will be say 20 object( a max).  Then there's
a corresponding ramp down where the 20 objects go down to 1 with the
ones in back droping off first.  Seems like you could do with with JS
and a variably sized FIFO buffer of translate rotate transformations.

On 7/19/07, Bryan Teoh  wrote:
> I've looked at some of the videos on that site.  Not only are the
> images not initially erased (allowing the picture to create those 3d
> forms) but it seems that part of the image is able to be wiped away at
> a later time.
>
> http://www.onoxo.net/clean_exp_m/clean_exp_m.php
>
> setting a low erase value (or value of 0) in the alpha channel will
> leave a trail of the image as it's moved through space, but how could
> the image trail be erased at a later time without effecting other
> parts of the image that it may overlap?
>
> Bryan
> --
> http://www.bryanteoh.com
> http://www.icelu.net
> http://www.ksod.net
>


Quote: wesley.hoke@gmail.com wrote on Thu, 19 July 2007 14:16

----------------------------------------------------

> Perhaps by not actually having anything to do with erasing. 

Not if you want to achieve what's going on in the videos, but it could still be done that way to do the stills the OP talked about.

> My guess would be that there's a 3D pbject (possibly stored as a display list)

> that is drawn 1 to N number of times with slightly different rotation

Yup. After seeing the (very neat) videos, that would be my guess too. I do similar things by parsing the cmdlist from jit.gl.sketch and then deleting, FIFO-style. Pretty cool, once you get around the weirdness of cmdlist... especially fun if you start deleting entries at random or in different orders, too.

Quote: wesley.hoke@gmail.com wrote on Thu, 19 July 2007 14:16
----------------------------------------------------
> Perhaps by not actually having anything to do with erasing. 
Not if you want to achieve what's going on in the videos, but it could still be done that way to do the stills the OP talked about.

> My guess would be that there's a 3D pbject (possibly stored as a display list)
> that is drawn 1 to N number of times with slightly different rotation
> and translation parameters.  
Yup. After seeing the (very neat) videos, that would be my guess too. I do similar things by parsing the cmdlist from jit.gl.sketch and then deleting, FIFO-style. Pretty cool, once you get around the weirdness of cmdlist... especially fun if you start deleting entries at random or in different orders, too.

how can i get it in jitter