How do I setup the native libraries with maven?

[doev]

Hello,

if I use lwjgl3 in the manual way I have to set "-Djava.library.path=<dir>/lwjgl_3.0.0a/native" to run the application. How is the recommend way to set this with maven?

[spasi]

See this sample project, you must use:

SharedLibraryLoader.load();

Please note that, before the official release of LWJGL 3.0, a similar solution will be included in LWJGL.

edit: The above is not required with the latest nightly builds.

[doev]

Thx. The project takes me one step forward. Now I get "Invalid X server connection specified" and I remember this problem appears if you are working with glfw in the wrong thread. But the demoproject (your link) is not working with threads.

[spasi]

Try the latest nightly build. Use this maven URL: https://oss.sonatype.org/content/repositories/snapshots/ and this LWJGL version: 3.0.0b-SNAPSHOT.

If that doesn't work, make sure OpenGL is working fine on your machine.

[doev]

3.0.0b-SNAPSHOT does not change the problem, same error. But I tested Lwjgl3Test.java with "LWJGL 3.0.0a build 48 (ZIP)" and it works well.

[doev]

build #3.0.0b build 9 also works fine.

[spasi]

It sounds similar to this issue. edit: also this one.

[spasi]

Actually, the latest 3.0.0b-SNAPSHOT doesn't have an "Invalid X server connection specified" error. Are you sure you tested the correct build?

[doev]

Sorry, my fault. When I use 3.0.0b-SNAPSHOT I can't compile cause GLContext.createFromCurrent(); is not known.

[spasi]

See the latest getting started guide: you must use GL.createCapabilities().

[doev]

I changed "GLContext.createFromCurrent()" to "GL.createCapabilities()" and also test the HelloWorld.java example with an additional "SharedLibraryLoader.load()". In both cases I get a NullPointer-Exception:

Exception in thread "main" java.lang.NullPointerException
   at org.lwjgl.system.Checks.checkPointer(Checks.java:80)
   at org.lwjgl.opengl.GL.createCapabilities(GL.java:278)
   at org.lwjgl.opengl.GL.createCapabilities(GL.java:230)
   at HelloWorld.loop(HelloWorld.java:93)
   at HelloWorld.run(HelloWorld.java:26)
   at HelloWorld.main(HelloWorld.java:114)

Edit:

Line 93: GL.createCapabilities();

[spasi]

Does it help if you uninstall libgl1-mesa-dev? Also, what GPU do you have?

[doev]

Removing libgl1-mesa-dev which includes libqt4-opengl-dev and libglu1-mesa-dev helps. Now the examples are working.

GeForce GTS 450
346.82
Linux-x86_64

[spasi]

If it's not too much trouble, could you install libgl1-mesa-dev again, run this code and paste the output here?

System.out.println("contextGLFW  = " + GLFWLinux.glfwGetGLXContext(window));
System.out.println("contextLWJGL = " + GLX.glXGetCurrentContext());

long glXGetCurrentDisplay = GL.getFunctionProvider().getFunctionAddress("glXGetCurrentDisplay");
if ( glXGetCurrentDisplay != NULL ) {
	long displayGLFW = GLFWLinux.glfwGetX11Display();
	long displayLWJGL = JNI.callP(glXGetCurrentDisplay);

	System.out.println("displayGLFW  = " + displayGLFW);
	System.out.println("displayLWJGL = " + displayLWJGL);
} else {
	System.out.println("glXGetCurrentDisplay not found.");
}

Add it between glfwMakeContextCurrent(window) and GL.createCapabilities(). There is a good chance that simply reinstalling libgl1-mesa-dev won't reproduce the issue. If that happens, try reinstalling the Nvidia drivers, after libgl1-mesa-dev.

edit: Also, see if mesa adds a "libGL.so.1" symlink anywhere.

[doev]

contextGLFW  = 139802799196784
contextLWJGL = 139802799196784
displayGLFW  = 139802798297344
displayLWJGL = 0

I don't see any new symlink to libGL.so.1

There are two new links:

lrwxrwxrwx 1 root root 13 Mär 11  2015 /usr/lib/x86_64-linux-gnu/libGL.so -> mesa/libGL.so
lrwxrwxrwx 1 root root 14 Mär 11  2015 /usr/lib/x86_64-linux-gnu/mesa/libGL.so -> libGL.so.1.2.0