README.md

   1 # VIIper - a Snake Clone for Unicode-compatible Terminals
   2
   3 TODO: find a better name
   4
   5 ## Dependencies
   6
   7  - A VTE based terminal (like GNOME Terminal and a whole bunch of others)
   8  - Google Noto's Color Emoji Font (Fedora: `google-noto-emoji-color-fonts.noarch`)
   9
  10 ## Keybindings
  11
  12 hjkl or cursor keys move the snake.
  13 r to restart, p to pause, q to quit.
  14
  15 ## TODO
  16
  17  - DONE base game: fixed field size, fixed speed
  18  - DONE food (unicode)
  19  - DONE put 'sprites' into `schemes.h`
  20  - DONE snake elongates
  21  - DONE unicode chars
  22  - DONE input buffer (so fast 180° turns get executed)
  23  - DONE only redraw changing parts of the screen
  24  - PoC: input out of whack when stopping (^Z) and resuming
  25  - timer, score, increasing speed
  26  - keybindings for restart, pause, redraw
  27  - on dying: show end screen, allow restarting
  28  - bonus/special items: slower snake, shorter snake, etc.
  29  - decaying points? (more points the faster you get the food)
  30  - wall-wrap-around mode?
  31  - fix all `grep -n TODO viiper.c`
  32
  33 ## Notes
  34
  35 ### terminal compat
  36
  37 to display emojis, we need a terminal that can handle a color emoji font (no
  38 shit, sherlock). mlterm, xterm and urxvt didn't work in my tests (mlterm might
  39 work if compiled correctly, the other two use bitmap fonts and i don't think
  40 there are any w/ emoji support). konsole will have to be tested in the future.
  41 i intend to put bonus items in the game that will only be visible for a short
  42 time. when they get near the end of their life, SGI-5 (blink) will make them
  43 blink. this is supported in gnome-term 3.28 (vte 0.52) which is supplied with
  44 fedora 28. [bug report](https://bugzilla.gnome.org/show_bug.cgi?id=579964)
  45
  46
  47 ### strange behaviour of SIGALRM
  48
  49 I'm using SIGALRM to advance the snake's position. during some refactoring I
  50 noticed that when the signal handler returns, a STX (ASCII 0x02) byte gets
  51 pushed onto stdin.