Source code for graphicslib3D.Matrix3D?

Hello,

I'm trying to find the source code for graphicslib3D.Matrix3D.
May anybody point me to it?

Reason for this is that I'm getting the following Exception:

graphicslib3D/Matrix3D : Unsupported major.minor version 52.0


I would like to just compile Matrix3D in the current version of Java that I'm using.

Hello

It comes from this book:
https://athena.ecs.csus.edu/~gordonvs/textJ1E.html

Thank You! I cannot believe my google-foo failed.

I used Duckduckgo instead ;)

I just recently came across this actively developed library which supports JOGL and might be helpful (MIT licence):

https://github.com/JOML-CI/JOML 
(Java OpenGL Math Library)

Would be nice if this could be linked on the main JOGL site.

Thanks! This helps.

It's useful but it's not managed by the JogAmp community.

We used graphicslib3D in the first edition of our book.  Specifically, graphicslib3D is a math library we had previously developed for our graphics courses, and so we used it in the first edition.

But long ago we switched to JOML and no longer support graphicslib3D.  Our 2nd and 3rd editions of the textbook all use JOML instead.  JOML has much richer set of tools, has much better performance, and is better maintained.