labs and graph addons now patched to run under j803.  No more
domain errors but not checked if output were correct.

The main change needed in j803 is that isigraph must be shown
before gl2 drawing commands are executed.

Чт, 04 дек 2014, Michal Wallace написал(а):
> Hey Bill,
> 
> Sorry for taking so long to respond to this. My last post was just meant as
> a reference for anyone getting started with graphics, but I guess I should
> have elaborated on the problem that lead me to use the gl* instead of gd*
> commands.
> 
> I haven't tracked down what's causing it, but in 803, if you run:
> help > studio > labs > category:graphics > graph utilities
> 
> There is an error on step 7:
> 
> | domain error: chkgl2
> |       glbrush glrgb BRUSHCOLO
> 
> It works fine in 802, and I've verified that other users have this problem
> on both windows and android.
> 
> -Michal
> 
> 
> On Wed, Nov 19, 2014 at 4:33 AM, bill lam <[email protected]> wrote:
> 
> > I didn't try your script or know what it was expected to show or
> > what was broken.  Perhaps you can clarify.
> >
> > Henry Rich had written some remarks on glrect in jwiki
> >
> >
> > http://www.jsoftware.com/jwiki/Guides/Window%20Driver/gl2%20Command%20Reference
> >
> > May be that can explain your problem.  That said, glrect is just
> > a very thin cover function for Qt painter class, so that I
> > believe that is the way of how Qt draws.
> >
> > Ср, 19 ноя 2014, Michal Wallace написал(а):
> > > Some of the docs about graphics are out of date since the move to QT,
> > > and the gdxxx verbs broke (at least for me) in the upgrade to j803/QT5.
> > >
> > > So: I spent some time today putting together a little demo that shows how
> > > to use isigraph to draw to the screen and handle raw keyboard events:
> > >
> > >   https://github.com/tangentstorm/tangentlabs/blob/master/j/gltest0.ijs
> > >
> > > It doesn't do anything interesting visually. I just thought someone
> > > else might find it useful and/or teach me the error of my ways. :)
> > >
> > > I also used it to render a bitmapped font I made back in the DOS days:
> > >
> > >   http://i.imgur.com/fo4XcqF.png
> > >   https://github.com/tangentstorm/tangentlabs/blob/master/j/dosfont.ijs
> > >
> > > I've implemented a bitmapped text display like this in 4 other languages
> > > over the years, and none of them have ever made the job this easy. :)
> > >
> > > -Michal
> > > ----------------------------------------------------------------------
> > > For information about J forums see http://www.jsoftware.com/forums.htm
> >
> > --
> > regards,
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