Re: [gl4java-usergroup] Errors

[Virgil W. <vir...@ra...>]

> > In addition, after switching to version 2.4.1.0, I see these error
messages
> > printed out when my app runs:
> > GL ERROR : invalid operation
> > GL ERROR : 1282 == 0x502
> >
> Nobody will be able to help you until you send more detailed info: a piece
of
> code where is occurs and precise command after this error is signaled (yes
it
> means putting gljCheckGL() after each OpenGL command in this chunk of code
to
> spot the bug).
>

Ok, I think I've got it figured out.  Version 2.3.1.1 was letting me get
away with all sorts of tom foolery.  For starters, the paint method of
GLCanvas is being called, which is in turn calling my display.  All of this
is happening before I've set up appropriate data structures ,etc.  My test
application is written to basically do this kind of thing (rewritten for
simplicity):

public void run(){
    setupdata();
    while(true){
        modifydata();
        canvas.sDisplay();
    }
}

My display method in canvas draws things based on data structures that it
expects will already have been initialized in setupdata().  However, the
paint method of GLCanvas is getting called before I start the above
thread... and paint is calling display (So I'm trying to draw things based
on uninitialized data structures... hence the errors).  The paint method of
GLCanvas is getting called before I Start my thread since I am creating a
frame (and showing it) which holds a GLCanvas before I start the above
thread.

Additionally, I used to have a quad that had a texture mapped to it, but no
bindtexture had been called first. (Silliness, basically)

2.3.1.1 was lets me get away with these two errors without chastising me
(not sure why).  2.4.1.0 doesn't (which is a good thing :)

Thanks,
Virgil

> Max