I think sys_timer is the right way to go for this kind of thing. That said, if you are doing something interactive (rather than canned) you should also think about driving motion from mouse events.
Good luck, -- Raul On Wed, Feb 8, 2017 at 11:42 AM, Louis de Forcrand <[email protected]> wrote: > Hi everyone, > > I've been looking into the Qt facilities available in J recently, and I read > that 2D graphics are best done with gl2. > > I hacked together a simple program that displays a ball which bounces around > the isidraw container. Having never really done any graphics-related > programming, I used the window driver's timer function to call sys_timer at > regular intervals, which erases the previous circle, draws the new one, and > updates speed and position global vars. > The advantage of using the wd timer is that I can create a button which calls > "wd 'timer 0; pclose'" in order to exit the program in a clean fashion > without having to break. > > I suspect there is a better way to do this; how would the seasoned J > programmers on this forum go about creating such an animation? > > All help appreciated! > Louis > > PS: I hardly have any web-related (html, css, php, etc.) programming skills, > but any info about doing this in JHS is welcome as well. > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
