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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
: z5 b9 O6 M- m. Z6 @# y% @" A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
; q1 g) k6 k4 G
2 B/ e0 N7 O+ _4 E% g* g4 K8 g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
8 j( b9 A% I0 w Y$ d
. q! ~* s) t M. q& W$ s感谢感谢! i3 J* m' d4 C$ H' P; D: n
错误如下：
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) D) o5 B9 P) _Exception in thread "Thread-4" javax.media.opengl.GLException: java.lang.NullPointerException- A( f7 n6 }9 N+ d0 D2 E
at javax.media.opengl.Threading.invokeOnOpenGLThread(Threading.java:271)
9 C y$ b1 s3 l. L& M% G at javax.media.opengl.GLCanvas.maybeDoSingleThreadedWorkaround(GLCanvas.java:410)# D' O8 N& M, r! T% j; [* Y# \
at javax.media.opengl.GLCanvas.display(GLCanvas.java:244)
& o- q9 U& _ [' z at saf.v3d.Canvas2D.update(Canvas2D.java:113)
+ U6 L, k1 p1 v- {" U$ o# |+ R at repast.simphony.visualizationOGL2D.DisplayOGL2D.setPause(DisplayOGL2D.java:358)
% E6 @5 `8 ?5 U+ }$ B. |( }9 Z at repast.simphony.render.RendererManager.setPause(RendererManager.java:57)
$ G! |2 A& q; m, A9 Y at repast.simphony.ui.GUIScheduleRunner$ScheduleLoopRunnable.run(GUIScheduleRunner.java:46)5 a: L- D% e; |. R
at java.lang.Thread.run(Unknown Source); Z7 s$ q) ?4 C: S
Caused by: java.lang.NullPointerException
& y; m' V8 j& E) ]; |' ? at saf.v3d.scene.VEdge2D.doGetBoundingSphere(VEdge2D.java:130)
& j N) ?- j4 v: o9 a \3 \ at saf.v3d.scene.VComposite.doGetBoundingSphere(VComposite.java:88); l. P3 @9 i1 }1 p* _$ K* G. i
at saf.v3d.scene.VComposite.doGetBoundingSphere(VComposite.java:88): b1 E) g; R) n/ z% u: |4 W% W/ v
at saf.v3d.scene.VRoot.doGetBoundingSphere(VRoot.java:56)
3 w7 H' q# ]! w at saf.v3d.scene.VSpatial.getBoundingSphere(VSpatial.java:439)2 k8 J d! f R- T! q
at saf.v3d.scene.Camera.resetAndCenter(Camera.java:58)
+ p7 e3 C+ I; z z9 U, N1 M; b9 m at saf.v3d.Canvas2D.centerScene(Canvas2D.java:273)
( }$ C( m+ X8 U/ }! I' a at saf.v3d.Canvas2D.reshape(Canvas2D.java:302)
9 w @% k! p/ l5 n at com.sun.opengl.impl.GLDrawableHelper.reshape(GLDrawableHelper.java:85)
5 u9 S# J' C$ K6 N at javax.media.opengl.GLCanvas$DisplayAction.run(GLCanvas.java:431) J! [7 n, p/ K% K% _
at com.sun.opengl.impl.GLDrawableHelper.invokeGL(GLDrawableHelper.java:194)
* u; D* {( `2 O at javax.media.opengl.GLCanvas$DisplayOnEventDispatchThreadAction.run(GLCanvas.java:452)" T1 ~$ ^) `# p, A
at java.awt.event.InvocationEvent.dispatch(Unknown Source)
C6 F' L8 Q4 H$ L. g" \1 ? at java.awt.EventQueue.dispatchEvent(Unknown Source)
4 M V+ c6 O: I0 A9 R$ @ at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
0 ~9 w% U$ P( y, R8 }! w! ^ at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
j! J* [. Q4 R at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)7 d N6 i( V2 B Q8 O ~4 q
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
6 c& h$ ^- c3 B5 p at java.awt.EventDispatchThread.pumpEvents(Unknown Source) k( c5 ]" f' m- P7 Q" t/ z
at java.awt.EventDispatchThread.run(Unknown Source) |
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发表于 2011-8-14 15:50:58
