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TestCanvas crashes with LWJGL3 #1192
Description
Current master branch on Windows:
INFO JmeDesktopSystem 10:35:35 AM Running on jMonkeyEngine 3.3-6918
* Branch: master
* Git Hash: 46a52af
* Build Date: 2019-09-20
SEVERE JmeDesktopSystem 10:35:35 AM CRITICAL ERROR: Context class is missing!
Make sure jme3_lwjgl-ogl is on the classpath.
java.lang.ClassNotFoundException: com.jme3.system.lwjgl.LwjglCanvas
at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:264)
at com.jme3.system.JmeDesktopSystem.newContextLwjgl(JmeDesktopSystem.java:196)
at com.jme3.system.JmeDesktopSystem.newContext(JmeDesktopSystem.java:279)
at com.jme3.system.JmeSystem.newContext(JmeSystem.java:159)
at com.jme3.app.LegacyApplication.createCanvas(LegacyApplication.java:510)
at jme3test.awt.TestCanvas.createCanvas(TestCanvas.java:217)
at jme3test.awt.TestCanvas.main(TestCanvas.java:248)
Exception in thread "main" java.lang.NullPointerException
at com.jme3.system.JmeDesktopSystem.newContext(JmeDesktopSystem.java:280)
at com.jme3.system.JmeSystem.newContext(JmeSystem.java:159)
at com.jme3.app.LegacyApplication.createCanvas(LegacyApplication.java:510)
at jme3test.awt.TestCanvas.createCanvas(TestCanvas.java:217)
at jme3test.awt.TestCanvas.main(TestCanvas.java:248)
The same test app works fine with LWJGL2 on Windows.
I'm not sure what ever happened to jme3_lwjgl-ogl.
Activity
stephengold commentedon Sep 20, 2019
Similar crash with LWJGL3 on Linux. How hard would it be to implement
LwjglCanvasfor LWJGL3?tonihele commentedon Jan 26, 2020
I guess it requires similar tactic than https://github.com/LWJGLX/lwjgl3-awt.
jseinturier commentedon Jan 26, 2020
Hello.
I've submitted the PR #1150 to solve this problem but it is not accepted at this time.
The PR #1150 enables to render a Jmonkey scene within any AWT component and is independent from LWJGL version.
stephengold commentedon Jan 29, 2020
@jseinturier Do you understand why 1150 hasn't been integrated yet?
stephengold commentedon May 15, 2021
This issue is still present in JME v3.4.0-beta4.
stephengold commentedon May 15, 2021
TestSafeCanvasalso crashes, with a very similar stack trace:stephengold commentedon Jan 18, 2022
Still an issue in "master" branch as of January 2022.
stephengold commentedon Jan 18, 2022
Caused by the lack of a "com.jme3.system.lwjgl.LwjglCanvas" class in jme3-lwjgl3, obviously.
pavly-gerges commentedon May 21, 2022
I will investigate into this.
dcr31000 commentedon Jun 19, 2022
I'm beginning (and start learning) with jMonkeyEngine and got this issue.
Do you have a workaround to start developing ? (Maybe use a previous version ? jme2 ?)
pavly-gerges commentedon Jun 19, 2022
Just use lwjgl3 native window GLFW, or lwjgl-2 if you are using swing/AWT and want to utilize jme3 app within a swing application.
stephengold commentedon Jun 19, 2022
For support, I recommend joining the JMonkeyEngine forum and asking your questions there: https://hub.jmonkeyengine.org/
tonihele commentedon Nov 20, 2022
I can try to fix this. I already created an awful working demo. I'll get it to somewhat nice shape. Try to get feature parity with the LWJGL 2 one and make a PR. Then at least it is implemented and can be improved upon later.
Pic or didn't happen:
stephengold commentedon Nov 21, 2022
Thanks @tonihele . This looks promising.