Robert Bragg <[email protected]> writes: > Excerpts from Zajcev Evgeny's message of Tue Mar 01 13:47:41 +0000 2011: >> Robert Bragg <[email protected]> writes: >> >> [..] >> >> > I think in some game engines it is true that framerate variation can >> > have a severe impact on animations since some game engines actually >> > update animations in step with the framerate with a fixed progression of >> > game time. (E.g. you used to see this kind of thing with quake such that >> > animations could complete faster with a higher framerate) >> >> Great feature to have in clutter is externally driven master-clock for >> this kind of purposes! Externally driven master clock is also >> valueable when application is driven by another event loop >> implementation, say libev. This might be a quite tricky part >> integrating glib's event loop into libev. > > Glib's main loop API is fairly flexible in this regard. You can manually > iterate a GMainContext via g_main_context_iteration for instance and you > can also replace the poll() function that glib uses internally when > blocking for file descriptors using g_main_context_set_poll_func() which > can be used to proxy those file descriptors into a different mainloop > library.
yes, this way we do it for now, but unfortunately loosing a glib's timer precision a little. > > One thing I'd like our master clock to support though is an external > time source. For debugging purposes for example I'd like to run an app > in half-time or less to slow animations down or if I want to record > Clutter content to a video I wouldn't want Clutter to follow real world > time and drop frames. yes yes yes! exactly what we need! We currently use ugly patched version of master-clock to use external time source. With this kind of feature, it might be usefull to have master-clock individual to stage as well. BTW, i suspect a stylistic typo in clutter-master-clock.c: #define CLUTTER_MASTER_CLASS_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), CLUTTER_TYPE_MASTER_CLOCK, ClutterMasterClockClass)) MASTER_CLASS -> MASTER_CLOCK thanks! - lg _______________________________________________ clutter-app-devel-list mailing list [email protected] http://lists.clutter-project.org/listinfo/clutter-app-devel-list
