This has got to be a bug in SparseFieldProtrayal3D's updateModel  

method.  I can see all sorts of evil places where there's likely a  

bug there -- the number one possibility is that globalTG.removeChild 

(t) may be operating in the middle of the for-loop over  

globalTG.numChildren(), which is probably not wise.  :-)



Unfortunately, I do not have enough time to look at this code and  

debug it for a week or more (grant proposal deadline).  Gabriel might  

have time possibly.



Sean



On Oct 12, 2007, at 5:18 PM, Glen E. P. Ropella wrote:



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>

> Does this exception look familiar to anyone?  As far as I can tell, it

> doesn't even touch my code at all.  And even though I'm using a fixed

> seed so that it should be determined, the error only pops up  

> sporadically.

>

> - ------------------------------------------------------------

> java.lang.IndexOutOfBoundsException: Index: 820, Size: 797

>         at java.util.ArrayList.RangeCheck(ArrayList.java:547)

>         at java.util.ArrayList.get(ArrayList.java:322)

>         at javax.media.j3d.GroupRetained.getChild 

> (GroupRetained.java:423)

>         at javax.media.j3d.Group.getChild(Group.java:229)

>         at

> sim.portrayal3d.SparseFieldPortrayal3D.updateModel 

> (SparseFieldPortrayal3D.java:110)

>         at

> sim.portrayal3d.FieldPortrayal3D.getModel(FieldPortrayal3D.java:182)

>         at sim.display3d.Display3D.updateSceneGraph(Display3D.java: 

> 1142)

>         at sim.display3d.Display3D.step(Display3D.java:1098)

>         at sim.display.GUIState$Repeat.step(GUIState.java:606)

>         at sim.display.GUIState.step(GUIState.java:428)

>         at sim.display.Console$56.run(Console.java:2277)

>         at java.lang.Thread.run(Thread.java:619)

> - ------------------------------------------------------------

>

> - --

> glen e. p. ropella, 971-219-3846, http://tempusdictum.com

> The only good is knowledge and the only evil is ignorance. -- Socrates

>

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