Rear vew mirror - how to?

Hello guys,

Any idea how to go to implement a "rear view mirror"?

I mean, something that simply looks and works like the usual rear vew
mirror in the average cars game.

Ideally, I am looking for a pure VRML97 solution that does not involve
embedding the same world twice in my web page.

Any clever idea very welcome.

Thanks,

Julio

First option is to use Layer3d, and fill it with the contents of the
scene, minus the Layer3d node itself. Several vrml browsers support
this node.

Second option is to use CompositeTexture which is a BS Contact special
node that converts its children nodes into a special texture. Again
make sure it doesn't copy itself, as that causes a crash.

On Jul 18, 9:15*pm, ju...@diegidio.name wrote:
> Hello guys,
>
> Any idea how to go to implement a "rear view mirror"?
>
> I mean, something that simply looks and works like the usual rear vew
> mirror in the average cars game.
>
> Ideally, I am looking for a pure VRML97 solution that does not involve
> embedding the same world twice in my web page.
>
> Any clever idea very welcome.
>
> Thanks,
>
> Julio

Hi fabricator,

Thanks for the answer. The Layer3d sounds great, I will try that way.
The CompositeTexture sounds even better, but I am striving to stay as
cross-platform as possible.

<dreaming>It's indeed a pity: looking at VRML after some 10 years,
with a new standard and the web technologies finally ready, we have a
new plugins war. How clever! Everybody trying to flood the web with
virtual chatting. How clever. Hey SGI guys: please please please,
could you provide a new Cosmo Player for us? There is an entire web
revoltion onyl waiting for a reliable, cross-platfrom, standards
conformant, EAI supporting, web browser plugin for VRML97 and X3D.
C'mon guys!!!</dreaming>

-LV


On 18 Jul, 14:34, fabricator <fabricatorgene...@yahoo.com> wrote:
> First option is to use Layer3d, and fill it with the contents of the
> scene, minus the Layer3d node itself. Several vrml browsers support
> this node.
>
> Second option is to use CompositeTexture which is a BS Contact special
> node that converts its children nodes into a special texture. Again
> make sure it doesn't copy itself, as that causes a crash.
>
> On Jul 18, 9:15*pm, ju...@diegidio.name wrote:
>
>
>
> > Hello guys,
>
> > Any idea how to go to implement a "rear view mirror"?
>
> > I mean, something that simply looks and works like the usual rear vew
> > mirror in the average cars game.
>
> > Ideally, I am looking for a pure VRML97 solution that does not involve
> > embedding the same world twice in my web page.
>
> > Any clever idea very welcome.
>
> > Thanks,
>
> > Julio

can a layer3d give you a reversed image?

don't you need a complete copy of the world with the geometry and all
the textures reversed and any movement routed between the two etc etc.

On 18 Jul, 16:37, simon <simon.pl...@googlemail.com> wrote:
> can a layer3d give you a reversed image?
>
> don't you need a complete copy of the world with the geometry and all
> the textures reversed and any movement routed between the two etc etc.

Yes, although my bet is it should still be better than embedding a
vrml/x3d plugin twice within a page and coordinating the whole thing
through EAI...

Also, I have yet to see how this Layer3d node works, and maybe the
thing is even simpler? Say DEF/USE and a little bit of scripting...?

Am I getting your point?

-LV

>
> Am I getting your point?
>
> -LV

No, i don't think so, i mean that it wouldn't be a MIRROR image, ie
not reversed, as a "rear view mirror" should be.

BTW i went to see what a layer3d could do, in the X3D spec. and it
isn't there! is this just another non-standardised node.

On 18 Jul, 17:33, simon <simon.pl...@googlemail.com> wrote:
> > Am I getting your point?
>
> No, i don't think so, i mean that it wouldn't be a MIRROR image, ie
> not reversed, as a "rear view mirror" should be.

Nobody has mentioned "mirror" nodes. Layer3d it is, and you are still
supposed to provide the geometry.

> BTW i went to see what a layer3d could do, in the X3D spec. and it
> isn't there! is this just another non-standardised node.

This should have been clear. Any complaints?

-LV

> Nobody has mentioned "mirror" nodes.

neither have i?

> Layer3d it is, and you are still
> supposed to provide the geometry.

you say you want a 'rear view mirror', a layer3d will produce a 'rear
view camera' unless you reproduce all the geometry and textures
reversed.

you do realise that with a mirror left and right are reversed, with a
camera they are not.

>> BTW i went to see what a layer3d could do, in the X3D spec. and it
>> isn't there! is this just another non-standardised node.
>
> This should have been clear. Any complaints?
>
> -LV

don't understand

On 18 Jul, 18:21, simon <simon.pl...@googlemail.com> wrote:
> > Nobody has mentioned "mirror" nodes.
>
> neither have i?
>
> > Layer3d it is, and you are still
> > supposed to provide the geometry.
>
> you say you want a 'rear view mirror', a layer3d will produce a 'rear
> view camera' unless you reproduce all the geometry and textures
> reversed.
>
> you do realise that with a mirror left and right are reversed, with a
> camera they are not.

I do, and can you realize that "you are still supposed to provide the
geometry" is saying the same?

>
> >> BTW i went to see what a layer3d could do, in the X3D spec. and it
> >> isn't there! is this just another non-standardised node.
>
> > This should have been clear. Any complaints?
>
> don't understand

That means: what are you trying to say? But, I'd strongly suggest you
(re)read the thread at least once before elaborating further.

-LV

> Any idea how to go to implement a "rear view mirror"?

> I mean, something that simply looks and works like the usual rear vew
> mirror in the average cars game.

> Ideally, I am looking for a pure VRML97 solution that does not involve
> embedding the same world twice in my web page.

The immersive VRML97 browser cover/covise has such a node as unportable
Browser extension.

http://www.hlrs.de/organization/vis/covise/

You need to ask for permission to use it...

so long
MUFTI
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Micro$oft Knowledge Base Artikel-ID: 178294 Version: 3.1