Re: [cl-opengl-devel] Tick

On Thu, May 29, 2008 at 5:22 AM, Leonardo Varuzza varuzza@gmail.com wrote:

How to use the enable-tick function?

If you set the tick-interval window slot, display-window will call enable-tick for you. Anyway, here's an example:

(defmethod glut:tick ((w your-window)) (print 'foo))

(enable-tick window-instance 1000)

This will print FOO every second, but it'll start to drift because the time TICK takes to run is not taken into account when setting up subsequent timer callbacks which may or may not be the desired behaviour. This mechanism was implemented in a slightly ad-hoc fashion for a CG assignment of mine; suggestions (preferably with patches :-)) are welcome.