rogerallen / hello_lwjgl

simple lwjgl clojure example

• 👋 Hi, I’m @rogerallen or IRL: Roger Allen.
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hello_lwjgl's Issues

"omega" OpenCL example code not working

Checked in an example for OpenCL. uncomment the omega lines in core.clj & do "lein run omega" to reproduce.

There's no official example that I can find that is supposed to work with 3.0.0b. This blog
http://yarenty.blogspot.com/2015/03/lwjgl3-use-gpu-opencl-for-multithreaded.html
indicates it should work, but I've made enough subtle changes that I don't know if it will ever work...

Giving up for the moment. Anyone feel up to trying to fix this? Or pointing to working example code?

> lein run omega
Hello, Lightweight Java Game Library! V 3.0.0b SNAPSHOT
Run example Omega
  (a simple OpenCL test)
init
CL created
platform created
ctx-props created
errcode created
get devices #object[java.util.ArrayList 0x2320fa6f [CLDevice pointer [0x1024400], CLDevice pointer [0x1022700]]]
device 0 #object[org.lwjgl.opencl.CLDevice 0x4d722ac9 CLDevice pointer [0x1024400]]
context created 140395407619280
queue created 140395407619952
allocated memory
[LWJGL] cl_program_callback
kernel created 0
kernel-work-size created
Exception in thread "main" java.lang.ClassCastException: java.lang.Long cannot be cast to org.lwjgl.PointerBuffer, compiling:(/private/var/folders/zb/w97rn0bn1hl7stfrgk5_04mc0000gn/T/form-init7029757012931126534.clj:1:125)
    at clojure.lang.Compiler.load(Compiler.java:7391)
    at clojure.lang.Compiler.loadFile(Compiler.java:7317)
    at clojure.main$load_script.invokeStatic(main.clj:275)
    at clojure.main$init_opt.invokeStatic(main.clj:277)
    at clojure.main$init_opt.invoke(main.clj:277)
    at clojure.main$initialize.invokeStatic(main.clj:308)
    at clojure.main$null_opt.invokeStatic(main.clj:342)
    at clojure.main$null_opt.invoke(main.clj:339)
    at clojure.main$main.invokeStatic(main.clj:421)
    at clojure.main$main.doInvoke(main.clj:384)
    at clojure.lang.RestFn.invoke(RestFn.java:421)
    at clojure.lang.Var.invoke(Var.java:383)
    at clojure.lang.AFn.applyToHelper(AFn.java:156)
    at clojure.lang.Var.applyTo(Var.java:700)
    at clojure.main.main(main.java:37)
Caused by: java.lang.ClassCastException: java.lang.Long cannot be cast to org.lwjgl.PointerBuffer
    at hello_lwjgl.omega$main.invokeStatic(omega.clj:115)
    at hello_lwjgl.omega$main.invoke(omega.clj:29)
    at hello_lwjgl.core$_main.invokeStatic(core.clj:17)
    at hello_lwjgl.core$_main.doInvoke(core.clj:10)
    at clojure.lang.RestFn.invoke(RestFn.java:408)
    at clojure.lang.Var.invoke(Var.java:379)
    at user$eval5.invokeStatic(form-init7029757012931126534.clj:1)
    at user$eval5.invoke(form-init7029757012931126534.clj:1)
    at clojure.lang.Compiler.eval(Compiler.java:6927)
    at clojure.lang.Compiler.eval(Compiler.java:6917)
    at clojure.lang.Compiler.load(Compiler.java:7379)
    ... 14 more

Indicates a failure near this line:

(CL10/clSetKernelArg1p kernel 0 a-mem)

and that call http://javadoc.lwjgl.org/org/lwjgl/opencl/CL10.html#clSetKernelArg1p(long,%20int,%20long)

public static int clSetKernelArg1p(long kernel,
               int arg_index,
               long arg0)

does not ask for a org.lwjgl.PointerBuffer

0.4.0 not deployed to clojars

I'd like to make aaron-santos/zaffre depend on the official release of hello_lwjgl 0.4.0. Could you deploy it to clojars?

test 2.9.1 on windows & linux

XstartOnFirstThread causes problems with cider-repl integration [Mac OS X]

New to Clojure and it's been decades since I last worked with Java so apologies in advance for a slightly garbled issue! :)

Let me start with what I would like:

• run emacs
• M-x cider-jack-in
• load & evaluate the hello-lwjgl buffer
• observe the wondrous spinning triangle
• make changes to (draw) and see it reflected in the wondrous spinning triangle

All very well and fine but basically:

I can run the sample code from lein by passing -XstartOnFirstThread in :jvmopts

BUT

If I try to M-x cider-jack-in with -XstartOnFirstThread present emacs never manages to boot a repl, hanging instead.

Conversely, if I remove -XstartOnFirstThread, I can boot the cider repl but then end up with:

java.lang.IllegalStateException: GLFW windows may only be created 
on the main thread and that thread must be the first thread in the process. 
Please run the JVM with -XstartOnFirstThread.

…when I try to evaluate the hello-lwjgl buffer.

create native app?

Figure out lein uberjar and how to create a native mac/win/linux app.

add pointer to more modern example

This blogpost is updated to more modern (I think) clojure use: https://www.wedesoft.de/software/2023/05/26/lwjgl3-clojure/