Re: Fw: [x3d-public] Size of live Box

[Alan Hudson <giles@yumetech.com>]

Braden McDaniel wrote:
> Alan Hudson wrote:
>
> > George Anastassakis wrote:
> >
> > > More generally, how is it possible to get the dimensions of geometric 
> > > primitive nodes such as Boxes, Spheres, Cones, etc., since all the 
> > > respective fields (size, radius, height, etc) are initializeOnly?
> > in general you can't.  InitializeOnly fields are not readable.  A 
> > browser can throw those values away after the file is loaded.
> >
> > You can wrap them in a proto to make them readable.
> >
> > PROTO MySphere [
> >    inputOutput SFVec3f radius 2
> > ] {
> >    Sphere {
> >       radius IS radius
> >    }
> > }
> >
> > MySphere {
> >    radius 4
> > }
>
>
> No you can't. From 4.4.4.3, "An inputOutput field in the prototype 
> interface may be associated only with an inputOutput field in the 
> prototype definition...."

hmmm, good point.

The proto would have to do its own interal routing without using IS.  I 
know several browsers are letting this through though.  Likely needs to 
be tested in the conformance suite.



--
Alan Hudson

President Yumetech, Inc.                               www.yumetech.com
President Web3D Consortium                             www.web3d.org
206 340 8900
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