Re: surface simplification, OpenGIS

[Volker Coors <coors@igd.fhg.de>]

> >> Yup.  That's what I was thinking.  I started wondering
> >> last night (instead of coding) whether it might not be
> >> nice to have a pre-load distance, so that you could
> >> start the preload at one distance and display it
> >> when you get closer.  That would require threading,
> >> I think, at least in the final version, but might be
> >> worthwhile.
> >>
> >> Perhaps:
> >>
> >> PROTO NewLOD [
> >>   exposedField  MFNode  level []
> >>   exposedField  MFNode  preload[]
> >>   field         SFVec3f center 0 0 0
> >>   field         MFFloat range []
> >> ]
> >>
> >> What do you think?
> >>
> >
> >Bob,
> >
> >the preload field contains the distance for preloading some LOD level
> >data like the range field for display that data, doesn't it ?
> >Then it should be a MFFloat preloadrange []. Why an exposed field ?
> >
> >PROTO NewLOD [
> >   exposedField  MFNode  level []
> >   field         MFFloat preloadrange[]
> >   field         SFVec3f center 0 0 0
> >   field         MFFloat range []
> > ]
> >
> >But a useful preload distance depends very much on the moving speed of
> >the user/avatar. How do you get useful values for it ?
> >
> >Yours
> >
> >Volker
> 
> >
> >> Bob
> >> bob.crispen@boeing.com
> >
> >--
> Duh, if the big dataset for all LODs is going to be threaded, why bother
> with a a preload range. Can't you just let the thread continue with notice
> to the JVM when each LOD is ready?

In this case, you download all data wether you need all detail
information in the LOD node or not. What I've got in mind is to reduce
the data transmitted over the net. Transmit only the data that is really
displayed not all data that might be displyed some time while navigating
in the VRML world.

Yours

Volker 

> 
> Rex Brooks Communications Design        1361-A Addison, Berkeley, CA
> rexb@rbcomdesign.com                     Tel: 510-849-2309
> http://www.rbcomdesign.com               Fax: 510-849-1306

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Volker Coors              |__|__|_|_|_|_|          Fraunhofer IGD     
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Tel: +49-6151-155-406     | /_  /_  / _ |          D-64283 Darmstadt
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