[vtkusers] VTK and JNI

[Gahide Jérôme]

Hi everybody,

I have a Java application that use VTK. This appliaction create all the VTK objects we need.
After the application create the object, I have to pass an vtkActor to C++ using JNI (in order to print the render on a special big screen). 
For now, I have learned with some tutorials JNI and in order to anderstand how to get back the C++ pointer on a vtkActor, I have looked for the header file and the cxx that make the link beetween Java and C++ but I don't find them.

So the question are : 
- How can I get back the the C++ pointer on the vtkActor from the jobject I have, when I program with JNI.

    example : 
    java file.
    import vtk.*; 
    ...
    private vtkActor va;
    public native void getJNIvtkActor();
        
    cxx file .
    JNIEXPORT void ...(JNIEnv* env, jobject obj){

        what can I do here to work with my vtkActor? and not a jobject
        

    }

- Where can I find this file (.h .cxx) where Wrapping with Java is defined. (with JNI?).

Thanks a lot.
Jérôme.
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