From 178777234d8e1f0e235202cd4faeb36459003ed6 Mon Sep 17 00:00:00 2001
From: Matthew Flatt <mflatt@racket-lang.org>
Date: Thu, 21 Jan 2010 18:51:08 +0000
Subject: [PATCH] notes on improving 2htdp/universe

svn: r17766
---
 collects/2htdp/universe.ss | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/collects/2htdp/universe.ss b/collects/2htdp/universe.ss
index 4fd00f1823..2d41d5960c 100644
--- a/collects/2htdp/universe.ss
+++ b/collects/2htdp/universe.ss
@@ -1,6 +1,11 @@
 #lang scheme/gui
 
 #| TODO: 
+   -- yield instead of sync
+   -- run callbacks in user eventspace
+   -- make timer fire just once; restart after on-tick callback finishes
+   -- take out counting; replace by 0.25 delay
+
    -- make window resizable :: why
    -- what if clauses are repeated in world and/or universe descriptions? 
    -- what if the initial world or universe state is omitted? the error message is bad then.