VRML - Animation

Author

Animation

Richard Haygreen

2004-04-02, 5:47 pm

Is it possible to use animated Gif's in VRML? In particular I have a box,
acting as a wall, with a static texture, I would like this texture to move,
as if a data projector was projecting onto it. If it is only possible with
MPEG files can anyone suggest an easy way to produce an MPEG animation of
the sort of stuff normally seen in animated GIF's.

Many thanks in advance.

boris

2004-04-03, 4:32 am

"Richard Haygreen" <rjth2@ukc.ac.uk> wrote

> Is it possible to use animated Gif's in VRML? In particular I have a box,
> acting as a wall, with a static texture, I would like this texture to
move,
> as if a data projector was projecting onto it. If it is only possible with
> MPEG files can anyone suggest an easy way to produce an MPEG animation of
> the sort of stuff normally seen in animated GIF's.
>
> Many thanks in advance.

I dont see why not.

Instead of Image Texture there should be Movie Texture, with url lead to
animated gif.

Another possibility, if your demands are not so high, is to animate static
image.

simon place

2004-04-03, 9:31 am

Richard Haygreen wrote:
> Is it possible to use animated Gif's in VRML? In particular I have a box,
> acting as a wall, with a static texture, I would like this texture to move,
> as if a data projector was projecting onto it. If it is only possible with
> MPEG files can anyone suggest an easy way to produce an MPEG animation of
> the sort of stuff normally seen in animated GIF's.
>
> Many thanks in advance.
>
>
contact and cortona both do this in a movietexture ( using a transparent gif
you can get some nice effects.), however both seem to ignore the number of
repeats indicated in the file ( so unfortunately you can't get a single cycle,
unless you know the gif timing and code it yourself!) and contact doesn't stop
the animation when the stoptime is reached ( has to be a bug.), also the
quality in cortona seems very poor, leaves artefacts at the edge and jerky
animation compared to contact.

simon.

Richard Haygreen

2004-04-05, 7:32 am

Thanks for all the help. In spite of the VRML reference I have here you can
use animated GIFs with a movie texture, so there is no need to convert them.
The spec I have states that only MPEGs will work, hence my original
question.

Once again many thanks

Joerg Scheurich aka MUFTI

2004-04-05, 10:47 pm

> Thanks for all the help. In spite of the VRML reference I have here you can
> use animated GIFs with a movie texture, so there is no need to convert them.
> The spec I have states that only MPEGs will work, hence my original
> question.

This is correct. Some VRML browsers have extensions to support more
movie/sound/image formats, so you can use this extensions, if you want to
show your VRML file only to a limited audience.

I see no problem to convert a set of images to mpeg 1, cause there is mpeg
encoder software for this (in my "small UNIX world" there is free software
for it, for other systems there are at least commerical solutions...).

VRML is a open international ISO standard. It is not useful to build a open
standard on top of non open technology like GIF.

so long
MUFTI
--
Wenn Sie ein Videospiel benutzen, das am Bildschirm angeschlossen
ist, sollten Sie entsprechend der Anschlusskabellaenge Abstand vom
Bildschirm halten.
(Aus dem Handbuch einer Nvidia MX2 Graphikkarte von Elsa)

Heiko Recktenwald

2004-04-08, 10:31 pm

Hi,

gifs and html etc...

Joerg Scheurich aka MUFTI <rusmufti@helpdesk.rus.uni-stuttgart.de> wrote:
>
> This is correct. Some VRML browsers have extensions to support more
> movie/sound/image formats, so you can use this extensions, if you want to
> show your VRML file only to a limited audience.
>
> I see no problem to convert a set of images to mpeg 1, cause there is mpeg
> encoder software for this (in my "small UNIX world" there is free software
> for it, for other systems there are at least commerical solutions...).
>
> VRML is a open international ISO standard. It is not useful to build a open
> standard on top of non open technology like GIF.

As long as it is open for "illegal" filetypes, that some or all browsers
play. So to say a second de facto standard.

What is "open" in ISO btw? rfc 2028 seems to be open too.

Thanks,

H.

Joerg Scheurich aka MUFTI

2004-04-21, 11:05 pm

[color=darkred]
> What is "open" in ISO btw? rfc 2028 seems to be open too.

A good question. You need to ask some of the ISO people....

For example, as VRML97 was build, the PNG format was not a ISO standard,
at most it was "only" a ISO draft.

so long
MUFTI
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