night_mode

#!/bin/sh
# Taken from https://blog.onetwentyseven001.com/more-of-xrandr-or-blue-light-exposure/#.W2ExkRRKjb1
night_mode() { 
  for disp in $(xrandr | sed -n 's/^\([^ ]*\)[ ]*connected.*/\1/p'); do 
    xrandr --output $disp --gamma $1 --brightness $2 
  done } 
case $1 in 
  day) night_mode 1:1:1 1.0 ;; 
  normal) night_mode 1:1:1 1.0 ;; 
  night) night_mode 1:0.78:0.55 1.0 ;;

  1000) night_mode 1:0.18:0.0 1.0 ;;
  1500) night_mode 1:0.42:0.0 1.0 ;;
  2000) night_mode 1:0.54:0.09 1.0 ;;
  2500) night_mode 1:0.64:0.28 1.0 ;;
  3000) night_mode 1:0.72:0.43 1.0 ;;
  3500) night_mode 1:0.78:0.55 1.0 ;;
  4000) night_mode 1:0.83:0.65 1.0 ;;
  4500) night_mode 1:0.87:0.74 1.0 ;;
  5000) night_mode 1:0.90:0.81 1.0 ;;
  5500) night_mode 1:0.94:0.88 1.0 ;;
  6000) night_mode 1:0.97:0.94 1.0 ;;
  6500) night_mode 1:1:1 1.0 ;;

  *) night_mode 1:1:1 1.0 ;; 
esac
# From sct code:
#/* cribbed from redshift, but truncated with 500K steps */
#static const struct { float r; float g; float b; } whitepoints[] = {
#    { 1.00000000,  0.18172716,  0.00000000, }, /* 1000K */
#    { 1.00000000,  0.42322816,  0.00000000, },
#    { 1.00000000,  0.54360078,  0.08679949, },
#    { 1.00000000,  0.64373109,  0.28819679, },
#    { 1.00000000,  0.71976951,  0.42860152, },
#    { 1.00000000,  0.77987699,  0.54642268, },
#    { 1.00000000,  0.82854786,  0.64816570, },
#    { 1.00000000,  0.86860704,  0.73688797, },
#    { 1.00000000,  0.90198230,  0.81465502, },
#    { 1.00000000,  0.93853986,  0.88130458, },
#    { 1.00000000,  0.97107439,  0.94305985, },
#    { 1.00000000,  1.00000000,  1.00000000, }, /* 6500K */
#    { 0.95160805,  0.96983355,  1.00000000, },
#    { 0.91194747,  0.94470005,  1.00000000, },
#    { 0.87906581,  0.92357340,  1.00000000, },
#    { 0.85139976,  0.90559011,  1.00000000, },
#    { 0.82782969,  0.89011714,  1.00000000, },
#    { 0.80753191,  0.87667891,  1.00000000, },
#    { 0.78988728,  0.86491137,  1.00000000, }, /* 10000K */
#    { 0.77442176,  0.85453121,  1.00000000, },
#};