Hi Mike,
I use something like this for simple (non-behavior) animation:
public class Animator extends Applet implements ActionListener {
protected int counter = 0;
float z=0;
Timer timer = new Timer(100,this); //10 frames per second
public void actionPerformed(ActionEvent e ) {
counter++;
//set translations etc.
if (counter < 100)
z=z-0.2f;
translation.set(0,0,z);
transform3D.setTranslation(translation);
transformGroup.setTransform(transform3D);
}
}
This works fine for me, although I've heard rumors that Sun have used a duff
clock on PCs, so the
timing may not be very accurate.
Instead of a timer, you can subclass Canvas3D and override postRender() or
postSwap(). I haven't tried this yet,
but I imagine it might freeze up if you didn't make any movements in a
particular frame, or if you try to update
swing components at the same time.
A class from Josh Richmond that was posted recently: CatDogMouseBehaviour does
the same thing using behaviors.
From,
Greg. (java3d.org)
>>"Michael P. McCutcheon" wrote:
>>
>> I am used to programming in VRML. With it, you would have a
>> TimeSensor...you would route the timesensor to a particular object, on
>which
>> you would have a method that was called after each frame. In this method
>> you would update the position of your objects, then when the method
>> completed, VRML did it's rendering, and the time sensor would then do it
>all
>> over again.
>>
>> What I'm wondering, if I want to move a simple object around from 0 to
>-500,
>> say in 1 increments, (without using an interpolator, I want to explictly
>set
>> it my self), how would I do this? I ran some code like this but it
simply
>> does not seem to work:
>>
>> I have this in an event handler of a AWT button:
>>
>> for(int counter=0; counter<100; counter++) {
>> z=z-0.2f;
>> translation.set(0,0,z);
>> transform3D.setTranslation(translation);
>> transformGroup.setTransform(transform3D);
>> }
>>
>> Any tips on what classes I should be looking at to do such a thing the
>right
>> way?
>>
>> Thanks for any info...
>>
>> Mike
>>
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