Newbie has troubles with xith's Ase source exemple

Engines, Libraries and Tools Xith3D Forums
#1

Hi everybody,
could you please have a look to my #~@@@ problem ?

i’m new with Xith3d and i try to run xith’s Ase source exemple from Eclipse.
http://www.xith.org/tutes/GettingStarted/html/the_ase_geometry_loader.html

This is the piece of code wich throws me an exception error:

  private void loadGeom() {
        try {

              
              /*
               * Loads the ASE file
               */
              AseFile af = new AseFile();
              BufferedReader br = null;
              
              try {
                    // Attempts to read the file normally
                    br = new BufferedReader(new FileReader("crudetank_mod.ASE"));
              
              } catch (IOException e) {
                    // Attemts to read file from JAR
                    URL url = this.getClass().getClassLoader().getResource("crudetank_mod.ASE");
                    br = new BufferedReader(new InputStreamReader(url.openStream()));
              }
              AseReader r = new AseReader(br, af);
              af.parse(r);
              
              torso = new BranchGroup ();
              tankbody = new BranchGroup ();
              turret = new BranchGroup ();

              // Extracts list of named nodes
              java.util.Hashtable views = af.getNamedNodes();

              // Iterates though nodes, adding them to relevent base branch groups
              for (Enumeration e = views.keys() ; e.hasMoreElements() ;) {
                    String current = (String)  e.nextElement();
                    
                    if (current.equals("Torso")) {
                          torso.addChild((BranchGroup) views.get((Object)current));
                          
                    } else if (current.equals("Body") ) {
                          tankbody.addChild((BranchGroup) views.get((Object)current));
                          
                    } else if (current.equals("Turret")) {

//HERE IS THE PROBLEM WICH THROWS THE EXCEPTION
turret.addChild(((BranchGroup) views.get((Object)current));
}
blablabla

The excpetion is :
java.lang.ClassCastException
at Ase.CrudeTank.loadGeom(CrudeTank.java:107)
at Ase.CrudeTank.(CrudeTank.java:63)
at Ase.AseTest.(AseTest.java:94)
at Ase.AseTest.main(AseTest.java:78)

I would like to debugs it.
But before getting started i was wondering; why is there screenshots of this exmple, if it has never worked before.

i know that the .ase file has been read, and that te enumerator is full of stuff, it seems to be a casting problem between BranchGroup and the Node object.
So why does this probem occurs on my pc if this piece of code is supposed to be working ?

Thanks for your help

Psyko The Newbie

#2

Konik and i found the reason.

The casting of (BranchGroup) is responsable of the exception it works fine with (TransformGroup).

We have now a nice tank rotating :wink:

Have fun

Psyko

#3

My bad :frowning:

Problem was caused because I changed getNamedNodes to return TG’s rather than BG’s. I’ve patched the souce but it may take a few days to sync with the server.

Thanks for pointing out the bug.

If you liked that tute, I strongly suggest checking out this one: http://xith.org/tutes/GettingStarted/html/transformgroup_trees_with_t.html

getTransformGroupTree is quite a lot more useful than getNamedNodes for many situations :slight_smile:

Cheers,

Will.