Basic premise to draw a perfect circle via bash

perfect-circle.sh

#!/bin/bash

# Requires xdotool
# cx and cy are the center coordinates around which the circle will be drawn
# r is the radius of the circle
# time is how long the circle will take to draw
# steps is how many steps the circle will be drawn in
r=400
cx=$(echo "2560 + 1920 / 2 + 0.2" | bc -l)
cy="578.5"
time=2
steps=150
step_time=$(echo "$time / $steps" | bc -l)
PI=$(echo '4 * a(1)' | bc -l)

$(for i in $(seq 0 $steps); do ANG=$(echo "2 * $PI * $i / $steps + ($PI / 2)" | bc -l); X=$(echo "s($ANG) * $r + $cx" | bc -l); Y=$(echo "c($ANG) * $r + $cy" | bc -l); if [ $i -eq 0 ]; then printf "xdotool mousemove $X $Y mousedown 1 "; fi; printf "mousemove $X $Y sleep $step_time "; if [ $i -eq $steps ]; then printf "mouseup 1"; fi; done; echo "")