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authorBenjamin Chausse <benjamin@chausse.xyz>2020-10-03 19:27:15 -0400
committerBenjamin Chausse <benjamin@chausse.xyz>2020-10-03 19:27:15 -0400
commite371d9edd474bcf89cf5d462eaccb8638900b390 (patch)
treeed07118f5c514a55f23a779a1507640e46fd9ed2 /.local/bin/rain
Initial commit
Diffstat (limited to '.local/bin/rain')
-rwxr-xr-x.local/bin/rain100
1 files changed, 100 insertions, 0 deletions
diff --git a/.local/bin/rain b/.local/bin/rain
new file mode 100755
index 0000000..8a8d8f6
--- /dev/null
+++ b/.local/bin/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 \ No newline at end of file