http://code.haskell.org/~wchogg/Tetris.hs But when I try to run it, it exits immediately, without any message or window, let alone any animations..
That seems to be an issue when starting from within cygwin's bash. Starting from cmd, or by double-clicking, works. Since I don't have this issue with other OpenGL code, it must be built into reactive somewhere? The result appears very sluggish: when I do nothing, the ticks don't seem to come evenly, and when I try to move pieces, keyboard input and movement are out of sync by the second piece, with reactions happening very late (perhaps for the next piece instead of the current one), or seemingly not at all. I assume that is not an expected feature?-) This is on a 2Ghz single-core laptop running windows/xp, with ghc 6.11.20081215. Claus