2020.08-snake

Cody Boone Ferguson vs. Ilya Kurdyukov in

The Game of Snakes

This is a rewritten IOCCC 2020 winning entry by Cody Boone Ferguson.
I implemented/changed some of the features I wanted.

Changes

• square tiles with fullwidth unicode characters
• uses console sequences, no libcurses required
• disallowed turning in the opposite direction
• the segments spawn as in classic games
• the ESC key can be used to exit
• winning message letters are printed in random colours
• original option names changed:
  • MAXSIZE -> GOAL
  • WALLS -> WRAP
  • CANNIBAL -> NOCLIP
  • EVADE -> EXPIRY
• options are read from the command line: './prog WAIT=100'
• new option SAVER: if you encounter an obstacle this option gives you a delay to change direction before losing
• new option FOODS: specifies the number of food items in the game area (max 20)
• expiry time of food items is selected randomly in the range from EXPIRY/2 to EXPIRY
• default options:
  • SIZE=5 GROW=5 GOAL=200
  • SHED=20 SHEDS=-1 FOODS=3 EXPIRY=200
  • WAIT=200 WRAP=1 NOCLIP=0 SAVER=2

Notes

• You can back to the old display method (using libcurses) with the CURSES define.
• Use the CUSTOM define to include custom.h header file with game objects replaced with unicode emojis.
• You can switch to reading options from environment variables by defining GETENV.
• See the original work on the IOCCC website for instructions.

Thanks to Cody Boone Ferguson for the base version of this game, as well as for testing the unicode version and helping with macOS compatibility!

Issues

• In Ubuntu: Minor graphical glitches when using the default terminal font "Ubuntu Mono Regular", works fine with "Monospace Regular".
• In macOS: Missing arrow symbols, use CUSTOM mode with emojis instead.