OBJ loading error

Troubleshooting graphics
1

Hi all people,



I have a problem.

I want to load a model as OBJ, but I'm having problems with this line:



converter.convert(objFile.openStream(),BO);

I get this error :  java.lang.NullPointerException



The model format is OBJ, and is exported with Blender. Any idea?  :?

2

Well, a NullPointer is pretty specific. One of the Objects used in that line is null. Check which one…

3

I have the problem with Convert() and SetProperty()



Lets see, I use:



converter.setProperty("mtllib",objFile);

converter.convert(objFile.openStream(),BO);



And this is the convert Method:



Converts an .obj file to .jme format. If you wish to use a .mtl to load the obj's material information please specify the base url where the .mtl is located with setProperty("mtllib",new URL(baseURL))



Now, the problem is that I don't know how to work with setProperty, 'mtllib', new URL, and "base URL"  :|

Any tip?



Edit:

I have to say that I use only one URL, and it is Base URL. Line:



URL objFile=TestObjJmeWrite.class.getClassLoader().getResource("jmetest/data/model/x.obj");



Edit 2:



I'm testing it with TestObjJmeWrite.java (Maggie simpson example).

4

can you post the code? Its hard to track down an NPE when you can't see how all of the objects are being made :wink:

5

Sure! There is: TestObjJmeWrite.java  

It works. The problem only comes when I change the OBJ file.

6

Well, this is the code that works, isnt it? I suppose you just change the string "jmetest/data/model/maggie.obj" to a path on your computer. That cannot work. A classpath has to be given here. Or you create an URL from a file like this:

new File("/my/path/and/file.obj").toURL();

7

Normen you are awesone. oh my god. It works! Thank you!!!

Thanks to sbook too.