openvrml-develop

[openvrml-develop] Image,Movietexture and FPS

[Michael S. <Mic...@gm...>]

Hi,

the os independent Imageloader is the Class Image, why isn't there any 
Information about the frames per second
of a movie, the NodeMovieTexture need this Information, but in the update 
Method only the speed Field is
accepted. I think the speedvalue of 1.0 indicates that the Movietexture 
plays with her normal speed.
Has anyone some hints for me or is this a bug ?

Micha.

Re: [openvrml-develop] Image,Movietexture and FPS

[Braden M. <br...@en...>]

On Fri, 2002-03-29 at 10:45, Michael Schuldt wrote:
> Hi,
> 
> the os independent Imageloader is the Class Image, why isn't there any 
> Information about the frames per second
> of a movie, the NodeMovieTexture need this Information, but in the update 
> Method only the speed Field is
> accepted. I think the speedvalue of 1.0 indicates that the Movietexture 
> plays with her normal speed.
> Has anyone some hints for me or is this a bug ?

"frames per second" is one way of expressing the speed of a movie, but
it requires that you have a movie comprising frames. The speed of a
movie is the rate of play as expressed as a factor of the normal speed.
What if, for example, a MovieTexture was an SVG animation?

-- 
Braden McDaniel                           e-mail: <br...@en...>
<http://endoframe.com>                    Jabber: <br...@ja...>

Re: [openvrml-develop] Image,Movietexture and FPS

[Michael S. <Mic...@gm...>]

>"frames per second" is one way of expressing the speed of a movie, but
>it requires that you have a movie comprising frames. The speed of a
>movie is the rate of play as expressed as a factor of the normal speed.
>What if, for example, a MovieTexture was an SVG animation?

It's a good question, I think the initial value for Frames Per Second 
should be 1.0.
If SVG animation is a Movietexture the playback speed is controlled over 
the speed,
field and the fps value should be 1.0. Other opinions on this topic ??

Micha.

Re: [openvrml-develop] Image,Movietexture and FPS

[Braden M. <br...@en...>]

On Sun, 2002-03-31 at 04:05, Michael Schuldt wrote: 
> 
> >"frames per second" is one way of expressing the speed of a movie, but
> >it requires that you have a movie comprising frames. The speed of a
> >movie is the rate of play as expressed as a factor of the normal speed.
> >What if, for example, a MovieTexture was an SVG animation?
> 
> It's a good question, I think the initial value for Frames Per Second 
> should be 1.0.

1 frame per second? Why? 

> If SVG animation is a Movietexture the playback speed is controlled over 
> the speed,
> field and the fps value should be 1.0. Other opinions on this topic ??

Since the MovieTexture implementation shouldn't care about fps, I think
it stands to reason that there is no need to include that information in
the Image interface. The Image implementation should make the
translation between fps and speed where appropriate.

It looks like our MovieTexture implementation is currently very
frame-oriented; I don't think that's correct.

-- 
Braden McDaniel                           e-mail: <br...@en...>
<http://endoframe.com>                    Jabber: <br...@ja...>