[JAVA3D] I want to add a button for zoom in or out

[Qiu Guojin]

hi,
Now I develope a program and It need zoom in and zoom out.
I want to use a button to make it zoom in or out when press it.
But i don't know how to do ,can someone tell me .
thanks in advance.

I tried to do as following.
Transform3D mmm ;
double x=0;
....
if (e.getSource=="button"{
    mmm.setScale(x);
    behaviorTrans.setTranslation(mmm);//behaviorTrans is a TransformGroup
}

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