Switching from LWJGL2 -> 3

OpenGL Development
#1

I’m wanting to update my game engine from LWJGL 2 to LWJGL 3 and want to know what is different?

I have heard that input and how the screen is called is different but is that really all that has changed? nothing to the rendering process?

Thanks

#2

Rendering is largely the same. Some API calls into OpenGL have been tidied up. Mostly the notable changes are in init code and input.

Cas :slight_smile:

#3

I hesitated long before I finally had the courage to switch - but it was surprisingly fast for my project: it took me only one afternoon to switch and bring it back to run again correctly. The next two days I spent some time to look deeper into it and improve the new code.

There is only one thing that worked before but I didn’t bring it back to work so far (but didn’t really try, because I always forget and its kinda low prio a the moment): changing to and from fullscreen with the press of a key.

As @princec already stated: Rendering is largely the same, that was the easiest part :slight_smile:

#4

Oh, and Pbuffers are missing now, in case you used them in LWJGL2. You have to make your own modern version using FBOs.

Cas :slight_smile:

#5

swing-support is gone.

that’s still keeping me at 2.9.x.

#6

Thanks guys that explains a lot, I thought it was strange that most LWJGL 3 tutorials stopped after showing you how to set up the display, which was strange in my opinion xD

#7

basil_, what are you using Swing for?

I’ve had reasonable success integrating LWJGL3 with JavaFX, though I wouldn’t exactly call it performant.

Cas :slight_smile:

#8

[quote=“basil,post:5,topic:56521”]
LWJGL 3 has JAWT bindings now. Sample code here. It is in no way production ready (the implementation is Windows-only even), but it will become perfectly usable once GLFW #25 is available.

[quote=“princec,post:4,topic:56521”]
LWJGL 3 supports everything there is about pbuffers: WGL_ARB_pbuffer, GLX 1.3, CGL, EGL. There’s just no cross-platform abstraction that wraps it all, like the Pbuffer class in LWJGL 2.

#9

[quote=“Spasi,post:8,topic:56521”]

Oh, I somehow totally overslept the completion of the JAWT integration.
I’ll add Win32 support for full OpenGL context creation (you know >= 3.0 and >= 3.2 core context and all that) with the code already working in lwjgl3-swt’s Win32 implementation.
If someone else wants to join in and do a X11 implementation and OS X (don’t know what the latest not-deprecated window manager is called there).

#10

@Cas : for the GUI :wink: … i’m also too slow on switching to javaFX.

do you use a dedicated thread (EDT like) with javaFX, or embedded in the GL pipeline ? i like swing cos’ it’s not freezing up when i screw up the GL; application remains somewhat “usable”.

@Spasi : thats very good news, i’ll move on to lwjgl 3.x once it’s “close to production”.