Olivier,
We are going to propose a new View method in 1.2 to cause the renderer
to run (sort of like Component.repaint). However, that may not solve
the off-by-one problem that you are having. We'll take a look at that
to see whether it is a bug or a design limitation. The easiest way
to work around it for now is to override processStimulus, check
whether the WakeupCondition was transformchanged, and, if so, set a
flag indicating that your wakeupOn routine should OR in the passed in
WakeupCondition with the WakeupOnTransformChange. Something like the
following (some of this is psuedo-code):
boolean wakeupNextFrame = true;
processStimulus(Enumeration criteria) {
super.processStimulus(criteria);
if (criteria includes WakeupOnTransformChange) // psuedo-code
wakeupNextFrame = true;
else
wakeupNextFrame = false;
}
protected void wakeupOn(WakeupCondition p0) {
WakeupCondition w;
if (wakeupNextFrame)
w = WakeupOr(wakeupFrameTG OR p0) // psuedo-code
else
w = wakeupFrameTG
super.wakeupOn(w);
}
Hope this helps.
--
Kevin Rushforth
Java 3D Team
Sun Microsystems
>Date: Fri, 3 Sep 1999 10:05:27 +1000
>From: Olivier fillon <[EMAIL PROTECTED]>
>Subject: Re: [JAVA3D] behaviours and rendering, manual render trigger
>To: [EMAIL PROTECTED]
>
>Thanks Kevin,
>basically it works except for the fact that, as explained, the screen is not
>updated .
>Being not rendered, I am always one step behind for my expected billboard
>behaviour
>Any clue?? except retriggering it a second time articially??
>How can I force a graph traversal?
>Olivier
>-----Original Message-----
>From: Kevin Rushforth <[EMAIL PROTECTED]>
>To: [EMAIL PROTECTED] <[EMAIL PROTECTED]>
>Date: Friday, September 03, 1999 9:47 AM
>Subject: Re: [JAVA3D] behaviours and rendering, manual render trigger
>
>
>>We are aware of this problem and plan to address it in 1.2. In the
>>mean time, your solution should work, if you know what transforms above
>>you can change.
>>
>>--
>>Kevin Rushforth
>>Java 3D Team
>>Sun Microsystems
>>
>>>
>>
>>>Date: Wed, 1 Sep 1999 07:42:03 +1000
>>>From: Olivier fillon <[EMAIL PROTECTED]>
>>>Subject: [JAVA3D] behaviours and rendering, manual render trigger
>>>To: [EMAIL PROTECTED]
>>>
>>>Hi fellow j3D addicts,
>>>Following a related issue discussed a couple of days ago, I am overloading
>>>the Billboard behaviour to only wakeup on a change of viewing platform
>>>transform.
>>>The purpose is to avoid continuous rendering which is taking all my CPU
>>>To achieve this, I use the following class
>>>
>>>public class MyBillboard extends Billboard
>>>{
>>> TransformGroup pt = null;
>>> WakeupOnTransformChange wakeupFrameTG;
>>> public MyBillboard(TransformGroup transformgroup, int i, Point3f
>>>point3f, TransformGroup platformTransform)
>>> {
>>> super( transformgroup, i, point3f);
>>> pt = platformTransform;
>>> wakeupFrameTG = new WakeupOnTransformChange(pt);
>>> }
>>>
>>>
>>> protected void wakeupOn(WakeupCondition p0) {
>>> super.wakeupOn(wakeupFrameTG);
>>> }
>>>
>>>}
>>>
>>>This seems to work my billboard is triggered after each transform change,
>>>sadly the result is not displayed:
>>>indeed the rendering loop seems to ignore the change and do not force a
>new
>>>render
>>>Is this the reason behing the continuous rendering set in Billboard?
>>>Is this a bug?
>--
>Olivier Fillon Minestar Project
>[EMAIL PROTECTED] Mincom Limited
>Ph.+61-7-3303-3344 61 Wyandra Street
>Fax+61-7-3303-3232 Teneriffe Qld. 4005.
>Australia
>Company home page: http://www.mincom.com/
>Personal home page: http://www.home.gil.com.au/~fillon
>--
>
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