About >First it was taking 100% of my CPU even when not touching any > button ...
There is workaround: simpleUniverse.getViewer().getView().setMinimumFrameCycleTime(10L); It drops CPU usage to a acceptable low level. 10L -> up to 100FPS 15L -> up to 66 FPS 20L -> up to 50 FPS I guess 10L is good number for unix/win2K, and 15-20 for Win98. Alessandro ----- Original Message ----- From: "Patrick-Emmanuel Boulanger-Nadeau" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Friday, January 17, 2003 2:29 AM Subject: [JAVA3D] Keyboard Behavior > Hello, > I've built a chess scene where I want to be able to move and drag & drop > pieces.. I've tried using > com.sun.j3d.utils.behaviors.keyboard.KeyNavigatorBehavior but it had 2 > problems. First it was taking 100% of my CPU even when not touching any > button and second we could not set the key we wanted to move around and they > where not doing what I wanted.. > > I though it would have been fixed in the 1.3.1 but it was not so I first > decided to get that CPU usage down. To do so I've built a second > wakeupCriterion that is not using the "on next frame". When no useful key is > pressed, I use that behavior so it won't wake up after that frame and thus > won't request a new frame to be drawn. To know when no key is used, I simply > return the state from my new KeyBehavior. > > I've copied some part from the old KeyNavigator but not much (well.. almost > only the structure :) ) and now it does what I want it to do -- it's like > walking in any direction, but relative to the chess game .. so pressing > forward will get you running in the XY plane but not on the Z axis even if > you look down.. anyway, the problem I now encounter is that after some time, > CPU usage goes up to 100% and I don't see any more change. > > It took, before hanging (maybe a deadlock?), respectively, 732 frames, 166 > frames, 1560 frames, 1080 frames .. and I've not understood what's wrong.. > > ..few minutes later.. > > Finally, I've found a way to overcome the problem. I've switched from > getCurrentMillis to the high resolution java 3d timer and I've been able to > go well over 10k frames repeatidly without any deadlock.. anyone can explain > this ?? > > Now here is a real question : how can I do like the MouseTranslate behavior > except that the piece will follow the mouse, from whatever I am looking. > Using the MouseTranslate class, it follow the mouse as if I was from > overhead .. I've had a hard time to get the screen shot I've included ;) > > Also, how can I "allow" an object to be moved or not without having to set > the properties ? (Since that will be changed often -- between each user -- > and I believe properties can't be changed when the scene is live). > > Well, that's it for now .. I include the screenshot I took and my 2 file for > the keyboard behavior, if it's needed to find why it was locking with the > getCurrentMillis and if someone need it =) > _______________________________________________________________________ Busca Yahoo! O melhor lugar para encontrar tudo o que você procura na Internet http://br.busca.yahoo.com/ =========================================================================== To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff JAVA3D-INTEREST". For general help, send email to [EMAIL PROTECTED] and include in the body of the message "help".
