diff options
Diffstat (limited to 'fun/rain')
| -rwxr-xr-x | fun/rain | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/fun/rain b/fun/rain new file mode 100755 index 0000000..8a8d8f6 --- /dev/null +++ b/fun/rain @@ -0,0 +1,100 @@ +#!/bin/bash +RAINS=("|" "│" "┃" "┆" "┇" "┊" "┋" "╽" "╿") +COLORS=("\e[37m" "\e[37;1m") +# More from 256 color mode +for i in {244..255}; do + COLORS=("${COLORS[@]}" "\e[38;5;${i}m") +done +NRAINS=${#RAINS[@]} +NCOLORS=${#COLORS[@]} +NUM_RAIN_METADATA=5 + + +sigwinch() { + TERM_WIDTH=$(tput cols) + TERM_HEIGHT=$(tput lines) + STEP_DURATION=0.025 + ((MAX_RAINS = TERM_WIDTH * TERM_HEIGHT / 4)) + ((MAX_RAIN_LENGTH = TERM_HEIGHT < 10 ? 1 : TERM_HEIGHT / 10)) + # In percentage + ((NEW_RAIN_ODD = TERM_HEIGHT > 50 ? 100 : TERM_HEIGHT * 2)) + ((NEW_RAIN_ODD = NEW_RAIN_ODD * 75 / 100)) + ((FALLING_ODD = TERM_HEIGHT > 25 ? 100 : TERM_HEIGHT * 4)) + ((FALLING_ODD = FALLING_ODD * 90 / 100)) + } + +do_exit() { + echo -ne "\e[${TERM_HEIGHT};1H\e[0K" + + # Show cursor and echo stdin + echo -ne "\e[?25h" + stty echo + exit 0 + } + +do_render() { + # Clean screen first + for ((idx = 0; idx < num_rains * NUM_RAIN_METADATA; idx += NUM_RAIN_METADATA)); do + X=${rains[idx]} + Y=${rains[idx + 1]} + LENGTH=${rains[idx + 4]} + for ((y = Y; y < Y + LENGTH; y++)); do + (( y < 1 || y > TERM_HEIGHT )) && continue + echo -ne "\e[${y};${X}H " + done + done + + for ((idx = 0; idx < num_rains * NUM_RAIN_METADATA; idx += NUM_RAIN_METADATA)); do + if ((100 * RANDOM / 32768 < FALLING_ODD)); then + # Falling + if ((++rains[idx + 1] > TERM_HEIGHT)); then + # Out of screen, bye sweet <3 + rains=("${rains[@]:0:idx}" + "${rains[@]:idx+NUM_RAIN_METADATA:num_rains*NUM_RAIN_METADATA}") + ((num_rains--)) + continue + fi + fi + X=${rains[idx]} + Y=${rains[idx + 1]} + RAIN=${rains[idx + 2]} + COLOR=${rains[idx + 3]} + LENGTH=${rains[idx + 4]} + for ((y = Y; y < Y + LENGTH; y++)); do + (( y < 1 || y > TERM_HEIGHT )) && continue + echo -ne "\e[${y};${X}H${COLOR}${RAIN}" + done + done + } + +trap do_exit TERM INT +trap sigwinch WINCH +# No echo stdin and hide the cursor +stty -echo +echo -ne "\e[?25l" + +echo -ne "\e[2J" +rains=() +sigwinch +while :; do + read -n 1 -t $STEP_DURATION ch + case "$ch" in + q|Q) + do_exit + ;; + esac + + if ((num_rains < MAX_RAINS)) && ((100 * RANDOM / 32768 < NEW_RAIN_ODD)); then + # Need new |, 1-based + RAIN="${RAINS[NRAINS * RANDOM / 32768]}" + COLOR="${COLORS[NCOLORS * RANDOM / 32768]}" + LENGTH=$((MAX_RAIN_LENGTH * RANDOM / 32768 + 1)) + X=$((TERM_WIDTH * RANDOM / 32768 + 1)) + Y=$((1 - LENGTH)) + rains=("${rains[@]}" "$X" "$Y" "$RAIN" "$COLOR" "$LENGTH") + ((num_rains++)) + fi + + # Let rain fall! + do_render +done
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