[ODE] XML ODE Data Interchange Format (version 4)

Mon Mar 8 21:43:46 MST 2004

William,
Excelent work again!

minor comments:

1) I'm not sure what TinyXML (http://www.grinninglizard.com/tinyxml/), which 
i use,  would do with the multiple [0,0,0,0] matrix lines.

2) could you please add some geom-specific params in the examples (for 
example, add radius and length to cylinders [does current ODE support 
cylinder collision with all other geoms ?!] )

3) Not sure if this was implicit in the text or not but one should be able 
to place joints and joint-groups under relative transforms (for example 
under a body, inheriting the body's transform)

4) whats with the copyright notice ? do i need explicit permission to use 
this format, quote all or part of the RFC, use the term XODE  etc. ?

I think this format should work ok for my needs (ezphysics), infact it is 
not that different from what i've exported so far.
Are you working on a reference implementation ?

Limor

>From: William Denniss <lists at omegadelta.net>
>To: ode at q12.org
>Subject: [ODE] XML ODE Data Interchange Format (revised)
>Date: Tue, 09 Mar 2004 12:58:52 +1000
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>
>Hi All,
>
>I have made some revisions to the spec which is up to revision 04 (the
>first public revision was 03).
>
>The new version can be found here:  http://tankammo.com/xode/xode.txt
>
>The old version can now be found archived here:
>http://tankammo.com/xode/xode.1.03.txt
>
>I am also getting a list of "common" extensions which aim to solve the
>most common needs not catered for by the standard tag set.  These are
>listed here (but are NOT part of the spec!):
>http://tankammo.com/xode/xode-extensions.txt
>
>
>Some of the changes are as follows:
>
>* Removed <mesh> attribute and clarified position on storing the
>graphical meshes.
>* Changed structure of <geom> and <joint> in how they reflect what type
>of geom or joint it is.
>* Grouped nodes into ODE objects, which include <body>, <geom>, and
><joint> and "collection" objects which contain ODE objects and include
><world>, <group> and <body>.  Read the intro to sections 2.1 and 2.2 for
>more information.
>* Better defined how the transforms work
>
>The spec is far from complete - but I want to make sure we have reached
>consensus on the design decisions to avoid me having to rewrite large
>parts of it which is rather time consuming.
>
>One question I would like to ask the community is how should we best
>represent the trimesh geom in XML?  I guess something like this could
>work:
>
><vertices>
>0,0,3,
>4,5,2,
>2,3,5
>2,3,4
></vertices>
>
><indices>
>1,3,5,2,7,6,3,4,8,9,0,10,2,4,5
></indices>
>
>One option would be:
>
><vertices>
>   <vertex x="0" y="0" z="3" />
>   <vertex x="4" y="5" z="2" />
>   <vertex x="2" y="3" z="5" />
></vertices>
>
>and
>
><indices>
>   <index>1</index>
>   <index>3</index>
>   <index>4</index>
></indices>
>
>But that bloats the file size a lot.  I guess we could even allow for
>both representations if need be.
>
>Cheers,
>
>Will.
>
>--
>William Denniss - will@ http://tanksoftware.com/
>
>
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