Hi, Thanks Georg for a good analysis of the problem.
It seems that the repaint problem have something to do with Java3D after all. I hope someone from the Java 3D team could look into this, before the FCS version of Java 3D is released. Best Regards, Roger Berggren Pasi Paasiala wrote: > >Hello Georg, > >Good report. I tested your application with JDK 1.4.0 & J3D 1.3 beta 2 and >was able to duplicate the problems. I wonder why your canvas gets repainted >when you move your mouse on top of it. Mine didn't before I added a mouse >handler for the canvas that did the painting. > >First I also thought that my problem was coming with both java and javaw. I >was launching the application with the InstallAnywhere launcher (lax). I >configured the configuration file to use java instead of javaw but I still >got the problem, but when I launched the application with plain java, I >didn't have it. > >Have you thought about any ways to overcome the problem? I have tried to >override the paint method in the frame containing the canvas, but it >doesn't >help. I think it is a timing problem. Repaint or a "focusGained" event >should start a thread that would do the painting after a while. Doesn't >sound very nice to me. > >I wonder if anybody else can reproduce these issues? > >Pasi > >-----Original Message----- >From: Discussion list for Java 3D API >[mailto:[EMAIL PROTECTED]]On Behalf Of Georg Rehfeld >Sent: 7. toukokuuta 2002 3:47 >To: [EMAIL PROTECTED] >Subject: Re: [JAVA3D] Java 3D 1.3 Beta2 > > >RE: [JAVA3D] Java 3D 1.3 Beta2Dear List, > >over the weekend I installed JDK 1.4.0 and Java3D 1.3_beta_2 which went >fine, thanks J3D team. > >I'm experiencing a paint() problem similar to that reported by Pasi >Paasiala ('covered part of Canvas3D goes gray'). > >I verbosely report this, because I get part of the error even with JDK >1.3.1 and the possibly related Bugs ... > > 4665482 - Missing first paint() event under JDK1.4 windows version > 4458337 - Merlin: repaints do not work by using javaw on WinNT if > double buffering is disabled > 4664490 - REGRESSION: AWT window background isn't drawn on win32 using > javaw > >... all name JDK 1.4.0 as the possible source of the bug. > >The problem only shows up when 'javaw' is used, not with 'java'. Similar >problems with J3D 1.2.1 did not show up. You'll find a small application >attached for evaluation. > >My setup: > >- PIII 700MHz >- 320MB Mainmemory >- W2K, Servicepack 2 >- nVidea Riva TNT with 16 MB Memory, AGP >- JDK 1.4.0 (build 1.4.0-b92) and >- JDK 1.3.1 (build 1.3.1-b24) >- J3D 1.3 beta 2, OpenGL > >Observations with JDK 1.4.0 (build 1.4.0-b92): > >1a. Click on 'Action' to pop up menu, release, then click again --> the > Menu disappears, then release ==> a gray area appears where the menu > was. Move the mouse over the Canvas3D --> gray area disappears > >1b. Select 'Action/New Shape (grid 0.02)' to generate many points and > drop the framerate. Repeat step 1, but this time do the second > click/release really fast, so that both fall into the same render > frame --> the error does NOT show up. > >1c. Open the 'Action' menu again, then click/release any menu item > (including the noop one), don't move the mouse yet --> the menu > disappears OK, eventually new content is displayed. Now move the > mouse ==> a gray area appears where the menu was and 1 (or few?) > frames later disappears, causing flicker. > >2. Overlap the 3D application partly with some other window, then switch > back to it, either by ALT-TAB or by moving the mouse into the title > bar and clicking --> the 3D content is repainted OK. Move the mouse > anywhere into the menu area of the 3D app ==> a gray area appears > where the other window overlapped. Move the mouse over the Canvas3D > --> the gray area disappears. > >3. Resize the 3D app --> the Canvas3D correctly is repainted. Move the > mouse into the menu area without moving over the Canvas3D ==> the > whole Canvas3D goes gray. Move the mouse over the Canvas3D --> canvas > gets repainted. > > >Observations with JDK1.3.1 build 1.3.1-b24 > >1a. Click on 'Action' to pop up menu, release, then click again ==> the > Menu disappears but a gray area is left behind; release ==> gray > area remains; move mouse to Canvas3D --> repainted OK. This behavior > does not show up always (~70% of the cases, sometimes mouse movement > in the menu area and/or opening the 'File' menu forces the error). > Could never reproduce bug with many points/low framerate. > >1b. from above does not show up. > >1c. Open the 'Action' menu again, then click/release menu item 'New > Shape (grid 0.02)' forcing many points/considerabe computation > time/low framerate --> the menu disappears, a gray area is left > behind until J3D repaints to all black then ==> the gray area > flickers up for one frame again sometimes (20% of the time). > I consider this acceptable, but report it for completeness. > >2. Overlap the 3D application partly with some other window, then switch > back to it, by ALT-TAB --> the 3D app is repainted OK just once. > Again overlap and switch back, this time by moving the mouse into the > title bar and clicking ==> often (50% of the cases) the Canvas3D is > noticably repainted twice: grey area visible, repainted, gray area > AGAIN visible, then finally repainted. Most visible with medium > frame rate/medium number of points. > >3. Resize the 3D app ==> the Canvas3D often (>50% of the cases) gets > repainted twice as with 2. above. Again most visible with medium > frame rate/medium number of points. > > >Conclusion > >Though with JDK 1.4.0 the bugs are more and more obvious, it seems to >me, that the cause is not only in JDK 1.4.0 but partly somewhere in J3D. >I hope my observations can help fix the bugs. > >Best regards > >Georg > ___ ___ >| + | |__ Georg Rehfeld Woltmanstr. 12 20097 Hamburg >|_|_\ |___ [EMAIL PROTECTED] +49 (40) 23 53 27 10 > > >----- Original Message ----- >From: Pasi Paasiala >To: [EMAIL PROTECTED] >Sent: Thursday, May 02, 2002 1:26 PM >Subject: Re: [JAVA3D] Java 3D 1.3 Beta2 > > >We seem to have a slight problem with Java3D 1.3 beta2. >What happens is the following: >When I put a window on top of the window containing the Canvas3D and then >bring the frame with the canvas to top again by clicking >on on the window title bar, I get the scene full rendered, but once I move >the mouse to the canvas, the part that was covered goes >gray. >If I then move the camera, the rendering is fine again. > >[...] > > > - att-1.htm > =========================================================================== To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff JAVA3D-INTEREST". 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