Hi, I'm trying to implement the PickingCallback Interface using the method
void transformChanged(int type,TransformGroup tg) and I use the
PickRotateBehavior.
my code is
321: public class MyCallbackClass extends Object implements
PickingCallback{
322: Transform3D t3=new Transform3D();
323: Vector3f v3f=new Vector3f();
325: public void transformChanged(int type, TransformGroup t) {
326: t.getTransform(t3);
327: t3.get(v3f);
327: System.out.println("Picking <"+v3f.x+","+v3f.y+","+v3f.z+">");
}
}
but sometimes, when I'm moving in the world, it gives me the next error:
Exception ocurred during Behavior execution:
java.lang.NullPointerException
at MyProgram$MyCallbackClass.transformChanged(MyProgram.java:326)
...
First of all: The TransformGroup in the transformChanged method... which
TransformGroup is it??
I mean, if I have some of them in the same ScenePath, the
TransformGroup
is the parent, or the first starting in the Locale??
Second: Why that error appear? I have the KeyNavBehavior and when I 'walk'
over the object I want to rotate, sometimes nothing happend and another
times the previous error appear!!
Thank you and Sorry for my English
Javi
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