"Ben O'Steen" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] Scenario: =========
Using PyGame in particular, I am trying to write an application that will run a scripted timeline of events, eg at 5.5 seconds, play xxx.mp3 and put the image of a ball on screen, at 7.8 seconds move the ball up and down. At this point, I hear you say 'Oh, like Flash'. Yes, well... Like Flash, but I don't want to take this app in the same direction as Macromedia took Flash, nor do I (ever) want the two to be compatible. One particular need is for the timeline to be quickly traversable. If I want to go to time=239.4 seconds, I'd like it to go there pretty much painlessly and hopefully with one call. (Same with play, reverse and pause really) I also want it to play for a long duration, with lots of different items (images, audio, etc.) <snip> Ben - This sounds very similar to a discrete event simulator, which uses a timeline to track when the "next" event is supposed to occur, and advances by events, rather than by straight elapsing of time (so that a 3 week simulation doesn't take 3 weeks to run!). SimPy does this very thing, and it also has a "real-time" mode so that simulations can be watched as they would really transpire. The one difference is that with SimPy, you don't really script the timeline ahead of time, but instead you script the individual events, and the resources that the various processes have to compete/contend for, thereby causing the events to get spread out over time. But you might get some clues from SimPy's traversal of the event queue, and the alternative model of building the queue dynamically while "executing" it might give you some other ideas about your game design. (I do recall that SimPy's event queue can eventually grow to hold thousands of events, and a huge speedup was accomplished a ver versions ago by using the bisect module to insert new events at the proper location in the queue. But this is only relevant if you build the queue dynamically.) -- Paul -- http://mail.python.org/mailman/listinfo/python-list
