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Thread: JOGL problem

  1. November 21st, 2013, 12:57 PM #1
    aussiemcgr
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    Default JOGL problem

    I have imported and I am attempting to run an example program from NASA World Wind (it's a mapping API). I have also recently upgraded to Java 7.
    My IDE is Springsource (it is built on top of Eclipse, so Eclipse for all intensive purposes) and I am using Maven for dependency management. When running the example, I am getting the following error:
    Exception in thread "main" java.lang.UnsatisfiedLinkError: no jogl in java.library.path
	at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1886)
	at java.lang.Runtime.loadLibrary0(Runtime.java:849)
	at java.lang.System.loadLibrary(System.java:1088)
	at com.sun.opengl.impl.NativeLibLoader.loadLibraryInternal(NativeLibLoader.java:189)
	at com.sun.opengl.impl.NativeLibLoader.access$000(NativeLibLoader.java:49)
	at com.sun.opengl.impl.NativeLibLoader$DefaultAction.loadLibrary(NativeLibLoader.java:80)
	at com.sun.opengl.impl.NativeLibLoader.loadLibrary(NativeLibLoader.java:103)
	at com.sun.opengl.impl.NativeLibLoader.access$200(NativeLibLoader.java:49)
	at com.sun.opengl.impl.NativeLibLoader$1.run(NativeLibLoader.java:111)
	at java.security.AccessController.doPrivileged(Native Method)
	at com.sun.opengl.impl.NativeLibLoader.loadCore(NativeLibLoader.java:109)
	at com.sun.opengl.impl.windows.WindowsGLDrawableFactory.<clinit>(WindowsGLDrawableFactory.java:60)
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:190)
	at javax.media.opengl.GLDrawableFactory.getFactory(GLDrawableFactory.java:106)
	at javax.media.opengl.GLCanvas.chooseGraphicsConfiguration(GLCanvas.java:520)
	at javax.media.opengl.GLCanvas.<init>(GLCanvas.java:131)
	at javax.media.opengl.GLCanvas.<init>(GLCanvas.java:90)
	at gov.nasa.worldwind.awt.WorldWindowGLCanvas.<init>(Unknown Source)
	at com.apmsoftware.airlinegame.application.web.gui.panels.flight.FlightOverviewMapPanelTest.main(FlightOverviewMapPanelTest.java:30)

    I somewhat understand what the exception is telling me: it cannot find jogl. Where I'm lost is that I am not sure WHERE it is looking. I do not know if "java.library.path" is referring to the system JAVA_HOME variable, Eclipse's default java version, or Maven's default java version. They all should be the same, but that is not an assumption I want to lock in until I have a better understanding of what is going on, considering that I just did the update to Java 7's JDK. Does anyone have any ideas? The internet has been pretty ambiguous for my specific situation.
    Also, does anyone know how I would go about getting JOGL? If it was a normal dependency exception, I would just add it to the Maven POM, but this sounds more like a JDK thing than a project-specific dependency thing.
    Any thoughts or ideas?
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  3. November 21st, 2013, 02:12 PM #2
    copeg
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    Default Moving

    Have you downloaded JOGL and added it to the classpath? For the basic configuration, I believe at a minimum it needs 4 jars
    jogl-all.jar
    jogl-all-natives*
    gluegen-rt.jar
    gluegen-rt-natives*
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  4. November 22nd, 2013, 10:35 AM #3
    aussiemcgr
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    Default Re: JOGL problem

    I believe the Maven Dependencies for the library is supposed to download jogl automatically. I can confirm that jogl-1.5.jar and gluegen-1.5.jar is in the project's target libs folder after performing a Maven Install. I can also confirm that jogl-1.5 and gluegen-1.5 is included as a Maven Dependency for the project.
    I am trying to get more help from the forums for the library itself, but my email account was auto-banned during registration (god knows why). I am trying to get it unbanned so I can post my question there.
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  5. November 24th, 2013, 02:05 PM #4
    Cornix
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    Default Re: JOGL problem

    Might it be that the native libraries can not be found?
    In that case you would need something like this before you use any JOGL classes:
    	public static void setLibraryPath(String path) throws SecurityException, UnsatisfiedLinkError, NoSuchFieldException, IllegalArgumentException, IllegalAccessException {
		System.setProperty("java.library.path", path);
		final Field sysPathsField = ClassLoader.class.getDeclaredField("sys_paths");
		sysPathsField.setAccessible(true);
		sysPathsField.set(null, null);
	}
    This is a little hack used to change the library path. I use it all the time when working with LWJGL.
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