Hi,
Nice product!
I'm working on it on and off and it's comming together slowly. Currently I'm working on the Bresenham algorithm, trying to squeeze as much performance as I can out of it. When lines are done I'll move on to circles/arcs.

I've looked at the files available at the Compsys website (here specifically)and while it does provide some pointers and ideas there is, as far as I can see, quite a few routines being called which are not actually included in the files (must be somewhere else which I've missed). For example put_char is called multiple times in glt6963c.bas but the actual subroutine is nowhere to be found. Neither in glipict2.bas or glt6963c.bas. Same thing with gl_init, put_it, gl_rect, gl_circ and so on.

Like I said, they must be in some other file on the site which I haven't found. But I'll just reinvent the wheel and write it myself... ;-)

Thanks!
/Henrik.