VMD-L Mailing List

From: Raymond de Vries (raymond_at_sara.nl)
Date: Tue Feb 08 2005 - 10:59:26 CST

Hi

> Given the complexity of the VRML file format and the fact you guys
>don't have a parser that'll handle the full spec, maybe we should look
>
>
Hmm, 'the full spec' of vrml, that's a risky business, with all the
different interpretations by everyone...

>at using one of the other formats for your CAVE use? What other file formats
>can your software read? I've used VMD's VRML output in several programs,
>
>
yes, your vrml2 is legal, that's not the problem.

>so I know it's legal VRML2. Is the software you're using home-grown stuff
>or is it some commercial CAVE-based VRML model viewer?
>
>
It is a home-grown loader but works pretty well on vrml files from
modelling packages. But I did not support PROTOs up til now, and after
looking at the specs PROTO does not look too complicated, at least to
load your vrml2s ;-) EXTERNPROTO is something else...

A converter would be the easiest way. I also tried polytrans (pretty
good normally) but it could not load the indexed line sets...

I will think about it, thnx for your quick respons.
Raymond

> John Stone
> vmd_at_ks.uiuc.edu
>
>On Tue, Feb 08, 2005 at 11:43:40AM +0100, Raymond de Vries wrote:
>
>
>>John,
>>
>>Aha, I see your reason. The reason I asked is because I have such a
>>simple-minded parser ;-) and I would like to have a simple geometry
>>conversion so that I can easily create presentations for our cave. Do
>>you know a converter/3d modeller that can load your vrml2 files okay?
>>I've tried a couple without succes...
>>
>>thanks a lot
>>Raymond
>>
>>
>>John Stone wrote:
>>
>>
>>
>>>Raymond,
>>>VMD uses the PROTO nodes to significantly decrease the size of
>>>the generated VRML2 files. Without them, the scene files can be
>>>several hundred megabytes in no time. There's no way to disable
>>>the use of PROTO nodes at runtime, but you could easily modify
>>>the VMD source code, and replace the PROTO usage by actual
>>>in-place macro expansions instead. That'd give you a completely
>>>flattened file that will work with simple-minded VRML2 parsers.
>>>
>>>John Stone
>>>vmd_at_ks.uiuc.edu
>>>
>>>On Mon, Feb 07, 2005 at 11:45:09AM +0100, Raymond de Vries wrote:
>>>
>>>
>>>
>>>
>>>>Hi,
>>>>
>>>>I was wondering whether it is possible or not it is possible to make a
>>>>vrml2 export without the PROTO. So just with simple geometry and
>>>>material (I see that the PROTO is used, at least, for geometry and
>>>>material in my exports).
>>>>
>>>>thanks
>>>>Raymond
>>>>
>>>>
>>>>
>>>>--
>>>>
>>>>Raymond de Vries, VR Specialist
>>>>Insight Services
>>>>SARA Computing and Networking Services, PO Box 94613, 1090 GP AMSTERDAM
>>>>email: raymond_at_nospam.sara.nl Phone +31-20-5923000 Fax +31-20-6683167
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>--
>>
>>Raymond de Vries, VR Specialist
>> Insight Services
>> SARA Computing and Networking Services, PO Box 94613, 1090 GP AMSTERDAM
>> email: raymond_at_nospam.sara.nl Phone +31-20-5923000 Fax +31-20-6683167
>>
>>
>>
>>
>
>
> 

-- 
 Raymond de Vries, VR Specialist
  Insight Services
  SARA Computing and Networking Services, PO Box 94613, 1090 GP  AMSTERDAM
  email: raymond_at_nospam.sara.nl   Phone +31-20-5923000  Fax +31-20-6683167