Question

This is a follow up question from Problem with array assignment

I now have addcube done like so.. and all works as expected, when I print the array. but when I print the same index’s AFTER assignment in another class It tells me their equal to 0. So the values are not ‘saving’. Why is this? How would I correct this?

       public void addcube(float highx, float lowx, float highz, float lowz){
        //Constructing new cube...
System.out.println("f = " + f);
        Global.cubes++;
        float y = 1.5f;
        System.out.println("highx = " + highx + "lowx = " + lowx + "highz = " +         highz + "lowz = " + lowz);
        //FRONT
        Global.camObjCoord[Global.i] = highx;
        Global.i++;
        System.out.println("cube i = " + Global.i);
}

In both cases I’m printing like so…

    int p = 0;
            while(p < 72){
                System.out.println(Global.camObjCoord[p]);
                p++;
            }

Global.i = 0 at the beginning.

The only other places the array is being referenced is the following..

cubeBuff = makeFloatBuffer(Global.camObjCoord);

                FloatBuffer makeFloatBuffer(float[] arr) {
            ByteBuffer bb = ByteBuffer.allocateDirect(arr.length*4);
            bb.order(ByteOrder.nativeOrder());
            FloatBuffer fb = bb.asFloatBuffer();
            fb.put(arr);
            fb.position(0);
            return fb;
    }

There is no further refrences to the array in my code.

Thanks.

Answer 1

I would seriously question your design. You’re always refering to that Global class, which apparantly seems to be changed from everywhere, and hence you run into such problems (for instance previously with your NullPointerException).

Try seperate things clearly using encapsulation and do not just use one global state that is operated on by different classes. If classes strictly operate only on their own members then dependencies are reduced and it is much easier to track where data is manipulated.