Re: [JAVA3D] why can't xj3D's X3DLoader load these two vrml files?

[Alan Hudson]

kindy huang wrote:

I write a program using Xj3D's X3DLoader to browse
VRML2.0 files.
The attached are two files I downloaded from web,
their 3D scenes can be seen using Cosmo Player or
Cortona VRML client, but they cannot be loaded by my
program(and Crossroad3D). One of them seems in binary
format, the other one looks like a VRML2.0 file in
text format, but still cannot be loaded.
xj3d does not support gzipped files.  ungziped before you load them in
Xj3d.  Usually you need to move the file from foo.wrl foo.wrl.gz and
then gunzip foo.wrl
what 's wrong with these VRML files or with my
program?
The second file is invalid VRML.

You have some top-level Appearance nodes.  Appearance nodes must be in a
Shape node's appearance field.
So this:

DEF style_1 Appearance {
       material Material {
               ambientIntensity 1
               diffuseColor 0.371078 0.347641 0.292953
               emissiveColor 0 0 0
               shininess 1
               specularColor 0 0 0
               transparency 0
       }
}
must be:

Shape {
   appearance DEF style_1 Appearance {
       material Material {
               ambientIntensity 1
               diffuseColor 0.371078 0.347641 0.292953
               emissiveColor 0 0 0
               shininess 1
               specularColor 0 0 0
               transparency 0
       }
}
}


Any hints? Thanks a lot!

BTW, I am also surprised why .wrl can be in binary
format.? I thought all of them should be pure text.
gzip files should not be in .wrl files.  The X3D spec has fixed this
problem, but the practice still continues in VRML.  In X3D you append a
z to indicate that file is gzipped, so .x3d  would become .x3dz if it
was gzipped.
--
Alan Hudson
President: Yumetech, Inc.                      http://www.yumetech.com/
Web3D Open Source Chair        http://www.web3d.org/TaskGroups/source/
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