Hi Javier,
The method transformChanged(int type, TransformGroup t) could return a null in the t
paremeter.
The transformGroup is the object taht PickRotateBehavior modifies, the type is:
NO_PICK (in this case the transformGroup t is null !!!!!!!!!!!!)
ROTATE (the PickRotateBehavior modifies the transformgroup)
TRANSLATE (the PickTranslateBehavior )
ZOOM (The PickZoomBehavior)
Your code should check the type,
if (type == PickingCallback.NO_PICK) {
System.out.println("NO pick");
else {
326: t.getTransform(t3);
327: t3.get(v3f);
327: System.out.println("Picking <"+v3f.x+","+v3f.y+","+v3f.z+">");
}
Regards,
Dani.
> 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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