Hi,
I´m just a bit confused about the different VRML Loaders. There is one,
which is included in OpenSG but which does not evaluate some VRMl
constructs (like the ElevationGrid), the other one (Experimental/Gerrit)
seems to be able to evaluate also the ElevationGrids but I don´t know
anything else about it.
Whats the difference between the two loaders? Which are the advantages,
disadvantages of every loader? How do they differ in functionality?
What we would need for our application is a Loader which evaluates VRML
97 correctly (including the ElevationGrid construct) and also is able
to draw non convex faces/facesets.
Which one suits better for that?
Is it possible to use both loaders in one application, and switch
between them at runtime. Are there duplicate class names in both ones,
or are they in principle able to coexist in one application?
We thought of (for a first try) reading the ElevationGrids with the
experimental loader and reading the other part of the VRML file with the
other reader and then mix them into one scene. Unfortunately the
standard loader stops when it runs into a VRMl statement it does not
know and does not display the following part of the file so that it will
be a bit of work to give the standard loader only the part of the VRML
file which will be understood correctly. By the way.... maybe it would
be a good idea to make the loader a littel bit more "fault tolerant". In
case of VRML it could be quite easy - maybe it could be achieved by
simply looking for the next closing bracket for the current block and
skip the blocks which could not be evaluated but to proceed reading and
print out a warning, that there was a part which could not be evaluated.
We also would like to contribute to OpenSG and maybe build the
extensions for the VRML-loader and make it learn to read ElevationGrids
(and to manage non convex faces .. and some other little things .. ) - I
expect you have other tasks to do, than those trivial things - but I
would not know where to start and how the VRMLLoader classes are
organized. Is there a simple principle which could be explained shortly?
Thanks
Desiree
_________________________________________________________________
Desiree Goerrissen
[ geschaeftsführerin / informatikerin ]
eMail: [EMAIL PROTECTED]
graphiX
Gesellschaft fuer Computergrafik, Numerik und Internetdienste mbH
Rochusstr. 230-234, 53123 Bonn, Germany
fon: +49 228 52674-0 fax: +49 228 52674-44
http://www.graphix.de
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