Hi prof paco,

after some testing,
i found that the latest EJS_4.3.7_120821\EJS_4.3.7 has this error  especially when the mouse drag on the display and move around changing the view angle.


(copied from console)
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at org.opensourcephysics.drawing3d.simple3d.SimpleElementTrail.computePositions(Unknown Source)
at org.opensourcephysics.drawing3d.simple3d.SimpleElementTrail.processChanges(Unknown Source)
at org.opensourcephysics.drawing3d.Element.processChanges(Unknown Source)
at org.opensourcephysics.drawing3d.ElementTrail.processChanges(Unknown Source)
at org.opensourcephysics.drawing3d.Group.processChanges(Unknown Source)
at org.opensourcephysics.drawing3d.Group.processChanges(Unknown Source)
at org.opensourcephysics.drawing3d.Group.processChanges(Unknown Source)
at org.opensourcephysics.drawing3d.DrawingPanel3D.getTargetHit(Unknown Source)
at org.opensourcephysics.drawing3d.DrawingPanel3D.access$5(Unknown Source)
at org.opensourcephysics.drawing3d.DrawingPanel3D$IADMouseController.mouseMoved(Unknown Source)
at java.awt.Component.processMouseMotionEvent(Unknown Source)
at javax.swing.JComponent.processMouseMotionEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$000(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)


i tried EJS_4.3.0_100622.zip and it seems to have no such error anymore

for your info :)

looking forward to your new version!

Post edited September 12, 2012 at 2:38 AM EST.

Attached File: ejs_fieldlines3Dwee01.zip

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