RE: FW: [gl4java-usergroup] animation stutters

[Peter <kaf...@xt...>]

> 
> > One definite difference between my code and JCanyon is that I'm not
> > using the NIO direct buffers, though OTOH I'm using display lists,
so
> > that shouldn't matter beyond the initial access.
> >
> 
> no, that is not correct. Java can move your vertex/normal/whatever
arrays
> around underneath you before your get the chance to call
glArrayElement
> (or
> similar). 


As I said in my post, I'm using *Display Lists*.  It doesn't matter what
happens to the arrays after the lists are made (altering the arrays has
no effect on the data stored in the list whatsoever)


>NIO direct (allocated through ByteBuffer.allocateDirect) buffers
> is
> the only safe way to use arrays that must remain at the same address.
So
> in a
> way you're lucky your display lists work.

Why?  The display list is made once, after which the address of the
original source data is irrelevant because the source values are stored
in the list.


> None of this applies to your problem with stuttering though.


Sorry, but as far as I can tell, unless you have a special version of
openGL with mutable display lists, then I don't think any of it applies
at all.

Cheers,

Peter.