hi,
i have some questions about creating a library for processing.
we have developed a simple interface to java3d. it enables users
to build a whole scenegraph with only some lines of code without
deep knowledge of scenegraphs.

the interface is in an alpha stage now and works fine in processing
via a jar in the scetchbook code-folder. now we're trying to make  
it compatible with the new processing library structure.

i read the basic instructions how libraries are working with processing.
as in the instructions described i set up a folder as follows:

pj3d ->
   library ->
   pj3d.jar
   export.txt
   
Then, i placed the folder in the processing 'libraries' folder.
until this point everything works fine. i can add the library
via the "import library" menu. i tried a little sample with the
interface to see how it works in processing version 0.085.
but after pressing the run button processing is knocked out and
i get this error message:

java.lang.NoClassDefFoundError: Pj3d
  at Temporary_7409_7547.setup(Temporary_7409_7547.java:7)
  at processing.core.PApplet.display(PApplet.java:100
  at processing.core.PGraphics.requestDisplay(PGraphics.java:362)
  at processing.core.PApplet.run(PApplet.java:916)
  at java.lang.Thread.run(Thread.java:534)

i dont know why or what the error is throwing. in the basic library
example i see in the constructor of the class the following:

parent.registerDispose(this);

i guess that this method is just registering the dispose. or is it necessary
for processing to register the library in some way?
im wondering that the interface is working fine as a jar in the scetchbook  
code-folder.

for help, thanks in advance

daniel0

hi,

i checked the package of the interface and find a error in the
structure of the package. and i forgot to add the java3d libraries
to the structure, thanks fry.
now i get a prober import statement that looks like:

import m05.Pj3d.*;

and the code to make a reference to pj3d looks like:

void setup()
{
 Pj3d p = new Pj3d(this, 640, 480);
}

processing doesnt crash anymore, but i got a error while compiling:

Semantic Error: The file "Pj3d.class" was found in directory
".../libraries/Pj3d/library/Pj3d.jar/" specified in the CLASSPATH.
However, that class file specifies the type "Pj3d".

.../.processing/build/Temporary_2447_256.java:7:16:7:19: Semantic
Error: Type "Pj3d" was not found.

i take as reference for the structure of the library the sonia library.
the folder structure now of the library looks like:

libraries ->
     Pj3d ->
           library ->
           Pj3d.jar
           export.txt
           the whole j3d stuff
           
the stucture of the Pj3d.jar looks like:

Pj3d.jar
     m05 ->
           Pj3d->
           class files
     META-INF ->
     MANIFEST
     
and the export.txt looks like:

# don't actually export anything.. this is only to link against
# inside of the p5 environment
applet=Pj3d.jar

# for an application, export to prevent from breaking
application=Pj3d.jar,j3dcore.jar,j3dutils.jar,Loader3DS.jar,
vecmath.jar,libJ3D.so,libJ3DUtils.so

i guess theres a little failure in the structure, but i dont know
where .

for help, thanks in advance

daniel05

hi,

thanks for youre help fry!! all works fine now. i got some bad mistakes
in my thinking about how the packages in p5 works.

also im not so skilled make packages in java...

now we have to make some testings with the new version of p5 and our
package. i hope we can send you soon a version of our package for
discussion.

daniel05