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  display list with solid sphere in error  (Read 600 times)
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Offline alesky

Junior Member


Medals: 3
Exp: 15 years


mmm....


« Posted 2013-03-01 12:36:24 »

hi guys

I'm trying to understand how use the display list and i have create a very easy code just to draw a sphere

this is my code in the init

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public void init(GLAutoDrawable drawable) {

                ............
                ............

      sp = gl.glGenLists(1);
      gl.glNewList(sp, GL2.GL_COMPILE);
      glut.glutSolidSphere (0.4, 16, 16);
      gl.glEndList();
}



bat during the execution of glut.glutSolidSphere (0.4, 16, 16); i take this exception

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Exception in thread "Timer-0" java.lang.RuntimeException: java.lang.NullPointerException
   at jogamp.common.awt.AWTEDTExecutor.invoke(AWTEDTExecutor.java:58)
   at jogamp.opengl.awt.AWTThreadingPlugin.invokeOnOpenGLThread(AWTThreadingPlugin.java:103)
   at jogamp.opengl.ThreadingImpl.invokeOnOpenGLThread(ThreadingImpl.java:206)
   at javax.media.opengl.Threading.invokeOnOpenGLThread(Threading.java:172)
   at javax.media.opengl.Threading.invoke(Threading.java:191)
   at javax.media.opengl.awt.GLCanvas.display(GLCanvas.java:428)
   at com.jogamp.opengl.util.AWTAnimatorImpl.display(AWTAnimatorImpl.java:74)
   at com.jogamp.opengl.util.AnimatorBase.display(AnimatorBase.java:142)
   at com.jogamp.opengl.util.FPSAnimator$1.run(FPSAnimator.java:128)
   at java.util.TimerThread.mainLoop(Timer.java:512)
   at java.util.TimerThread.run(Timer.java:462)
Caused by: java.lang.NullPointerException
   at it.spaghettisource.cap6.exn6p3.init(exn6p3.java:78)
   at jogamp.opengl.GLDrawableHelper.init(GLDrawableHelper.java:201)
   at jogamp.opengl.GLDrawableHelper.init(GLDrawableHelper.java:222)
   at javax.media.opengl.awt.GLCanvas$6.run(GLCanvas.java:926)
   at jogamp.opengl.GLDrawableHelper.invokeGLImpl(GLDrawableHelper.java:521)
   at jogamp.opengl.GLDrawableHelper.invokeGL(GLDrawableHelper.java:462)
   at javax.media.opengl.awt.GLCanvas$9.run(GLCanvas.java:964)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:199)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:646)
   at java.awt.EventQueue.access$000(EventQueue.java:84)
   at java.awt.EventQueue$1.run(EventQueue.java:607)
   at java.awt.EventQueue$1.run(EventQueue.java:605)
   at java.security.AccessController.doPrivileged(Native Method)
   at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:616)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)


can i use the glut function in the display list?
or i have to activate same flag that i forgot?

thanks

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