update

stepmania/TODO.glenn

@@ -5,6 +5,39 @@ is better held on the list than in a CVS document. :)
 Some of this is stuff I'm not quite sure how to deal with, but too
 low-pri to bother bringing up on the list.
 
+********
+
+For the gameplay screen, we transition to the "Stage" display, sit
+around for a long time, fade out the Stage display, then load the
+gameplay screen and tween it in.
+
+It'd be nice if we could go straight from one screen to another, tweening
+one off and the other on simultaneously (with a delay so it doesn't
+look like a jumble, but in parallel).
+
+Here's the idea:
+
+First, allow "buffering" a screen.  This loads the screen in the
+ScreenManager, but doesn't actually display it, so we have control
+over when it starts tweening in.  Screens will need to be adjusted
+to only load actors in the ctor, and receive a startup message to
+do the rest.
+
+This alone will let us load the gameplay screen while the stage
+screen is still displayed.  Currently, we wait four seconds, fade
+out, then spend another second or two loading; we should load then
+sleep for the remainder, so we always get four seconds (and less
+if we get rushed along by the start button).
+
+Once that's done, we can go a step further: render the prepped screen
+after it's loaded, set up crossfades (instead of two successive plain
+fades) which look as good but don't take as much time; and tween in
+parallel.
+
+(Once *that's* done, we can figure out if we want to use this for
+tweening menus, too.  For example, old screen shows its keepalive,
+preps the new menu, hides its keepalive, then both tween.)
+
 ********
 We have different kinds of things we want to trace, and different
 places to put them.