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最近在用repast s 建模做供应链管理的问题，对于repast s 中网络结构的使用很不了解
. l1 ?/ V# I& d9 r# U写完代码之后编译出现错误，应该是显示方面的错误，我实在弄不懂0 `1 l" p) h [1 T
A$ v! ?, ^; _ ~ m7 o' J! I8 {有没有哪位牛人帮我看看错误，或者给我个适用network结构的demo让我学习下% ?' p, W- o/ u, i. Q
( y1 w1 @* v1 [
感谢感谢2 l: v( L; R$ S/ [( Y! \
错误如下：
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Exception in thread "Thread-4" javax.media.opengl.GLException: java.lang.NullPointerException8 h4 c: s$ r4 n5 G* O
at javax.media.opengl.Threading.invokeOnOpenGLThread(Threading.java:271)0 C' B- m D7 h0 ?
at javax.media.opengl.GLCanvas.maybeDoSingleThreadedWorkaround(GLCanvas.java:410)( Y- S( A# F) G; Q: h4 ~6 F0 a+ ?/ X
at javax.media.opengl.GLCanvas.display(GLCanvas.java:244)2 w) e& b( d! l+ Z! _) }6 H; ^
at saf.v3d.Canvas2D.update(Canvas2D.java:113)
5 V8 z. X! a% T2 _' Y4 N, o( P at repast.simphony.visualizationOGL2D.DisplayOGL2D.setPause(DisplayOGL2D.java:358)
7 i& O9 P! ]) j9 d4 T Y at repast.simphony.render.RendererManager.setPause(RendererManager.java:57)8 z' S7 c: C" S. ^3 R6 _/ \
at repast.simphony.ui.GUIScheduleRunner$ScheduleLoopRunnable.run(GUIScheduleRunner.java:46)1 k( y/ h# Q9 _6 O2 x
at java.lang.Thread.run(Unknown Source)
8 R2 [2 E# ~8 t% m% _7 nCaused by: java.lang.NullPointerException7 {2 P" @. j' K B
at saf.v3d.scene.VEdge2D.doGetBoundingSphere(VEdge2D.java:130)
; G a& x' s0 m. u at saf.v3d.scene.VComposite.doGetBoundingSphere(VComposite.java:88)
+ E5 J3 `* d/ O at saf.v3d.scene.VComposite.doGetBoundingSphere(VComposite.java:88)
8 {9 g* m) y8 i3 l at saf.v3d.scene.VRoot.doGetBoundingSphere(VRoot.java:56)
) Y9 ~2 Z% T) v8 T at saf.v3d.scene.VSpatial.getBoundingSphere(VSpatial.java:439)
& A4 E. ~ Q. B: T/ t2 M# @2 C! u at saf.v3d.scene.Camera.resetAndCenter(Camera.java:58)# k# _8 G- H0 I. B
at saf.v3d.Canvas2D.centerScene(Canvas2D.java:273)
) M* O: c% S( r at saf.v3d.Canvas2D.reshape(Canvas2D.java:302)6 G8 B3 _2 l" l' l
at com.sun.opengl.impl.GLDrawableHelper.reshape(GLDrawableHelper.java:85)
6 D {+ A/ q [2 {, d5 r6 G at javax.media.opengl.GLCanvas$DisplayAction.run(GLCanvas.java:431)
Z* f0 E: x6 ?3 V$ v/ @% J at com.sun.opengl.impl.GLDrawableHelper.invokeGL(GLDrawableHelper.java:194)4 X7 a3 V% n6 u J1 T
at javax.media.opengl.GLCanvas$DisplayOnEventDispatchThreadAction.run(GLCanvas.java:452). D# b( s# ^/ ~
at java.awt.event.InvocationEvent.dispatch(Unknown Source)! e6 M1 L2 ]( O* ], |& [' x
at java.awt.EventQueue.dispatchEvent(Unknown Source)0 t5 m& H& m8 ?" G/ R5 o
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
z0 z9 Z0 ~& b+ a5 |. G) @ at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
' o4 d; G4 {3 b& k at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source); p7 O1 b! y, j9 w# m9 z% G4 v* ^5 f9 G
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)5 i* \, u+ k# q' r' Y6 x4 D) _) Y
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
4 e' V' e- @+ `9 H% S at java.awt.EventDispatchThread.run(Unknown Source) |
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发表于 2011-8-14 15:50:58
