scripts/sunset.py

@@ -1,55 +0,0 @@
-#!/bin/env python
-"""Sets the monitor temperature based on the current time using Hyprsunset"""
-from datetime import datetime
-from os import environ
-from socket import AF_UNIX, SOCK_STREAM, socket
-
-
-type Range = tuple[float, float]
-
-
-def lerped_amount(x: float, edges: Range) -> float:
-	"""How far `x` is between `values`"""
-	return (x - edges[0]) / (edges[1] - edges[0])
-
-
-def smoothstep(x: float, edges: Range) -> float:
-	"""Smoothly interpolates between the `edges` based on `x`"""
-	# Technically I should bounds check but whatever
-	return (x * x * (3.0 - 2.0 * x)) * (edges[1] - edges[0]) + edges[0]
-
-
-def day_elapsed(hours: int = 0, minutes: int = 0, seconds: int = 0) -> float:
-	"""Converts (H, M, S) into [0, 1] representing how far through the day it is"""
-	return ((((hours * 60) + minutes) * 60) + seconds) / 86400
-
-
-def main(sunrise: Range, sunset: Range, temp_range: Range) -> None:
-	"""Adjusts the monitor temperature based on the current time"""
-	now = datetime.now()
-	elapsed = day_elapsed(now.hour, now.minute, now.second)
-
-	if elapsed <= sunrise[0]:
-		temperature = temp_range[0]
-	elif elapsed < sunrise[1]:
-		temperature = smoothstep(lerped_amount(elapsed, sunrise), temp_range)
-	elif elapsed <= sunset[0]:
-		temperature = temp_range[1]
-	elif elapsed < sunset[1]:
-		temperature = smoothstep(lerped_amount(elapsed, sunset), (temp_range[1], temp_range[0]))
-	else:
-		temperature = temp_range[0]
-
-	hyprsunset = socket(AF_UNIX, SOCK_STREAM)
-	# In theory I should use $XDG_RUNTIME_DIR, but for me it's always `/run/user/1000/`
-	hyprsunset.connect(f"/run/user/1000/hypr/{environ["HYPRLAND_INSTANCE_SIGNATURE"]}/.hyprsunset.sock")
-	# In theory the message might not send in one go, but in practice it does do I won't bother handling it
-	_ = hyprsunset.send(f"temperature {temperature:.1f}".encode())
-
-
-if __name__ == "__main__":
-	main(
-		(day_elapsed(5), day_elapsed(7)),
-		(day_elapsed(21), day_elapsed(23)),
-		(2500.0, 6000.0)
-	)

scripts/sunset.sh

@@ -0,0 +1,65 @@
+#!/bin/env sh
+
+SUNRISE_START="$((5 * 60 * 60))"  # When to start turning up temperature
+SUNRISE_END="$((7 * 60 * 60))"  # When to reach max temperature
+
+SUNSET_START="$((21 * 60 * 60))"  # When to start turning down temperature
+SUNSET_END="$((23 * 60 * 60))"  # When to reach min temperature
+
+DAY_TEMP="6000"  # Display temperature (K) to use in full daylight
+NIGHT_TEMP="2400"  # Display temperature (K) to use at night
+
+CURRENT="$(((($(date '+%-H') * 60) + $(date '+%-M')) * 60 + $(date '+%-S')))"  # Time in seconds since start of day
+
+# Performs a calculation using an argument containing an input string
+calc() {
+  echo "scale=4; $1" | bc
+}
+
+# Evaluates a boolean expression on an argument containing an input string
+bool() {
+  echo "scale=1; $1" | bc
+}
+
+# GLSL Smoothstep, takes a single number as an argument
+smoothstep() {
+  if [ "$(bool "$1 <= 0")" = "1" ]; then
+    echo 0
+  elif [ "$(bool "$1 >= 1")" = "1" ]; then
+    echo 1
+  else
+    calc "$1 * $1 * (3 - 2 * $1)"
+  fi
+}
+
+# Interpolates between the 4th and 5th arguments based on the value of the 2nd in relation to the 1st and 3rd
+interpolate() {
+  LOWER_IN="$1"
+  VALUE="$2"
+  UPPER_IN="$3"
+  LOWER_OUT="$4"
+  UPPER_OUT="$5"
+
+  if [ "$((VALUE <= LOWER_IN))" = "1" ]; then
+    echo "$LOWER_OUT"
+  elif [ "$((VALUE < UPPER_IN))" = "1" ]; then
+    calc "$LOWER_OUT + (($UPPER_OUT - $LOWER_OUT) * $(smoothstep "$(calc "($VALUE - $LOWER_IN) / ($UPPER_IN - $LOWER_IN)")"))"
+  else
+    echo "$UPPER_OUT"
+  fi
+}
+
+if [ "$((CURRENT <= SUNRISE_START))" = "1" ]; then
+  TEMP="$NIGHT_TEMP"
+elif [ "$((CURRENT < SUNRISE_END))" = "1" ]; then
+  TEMP="$(interpolate "$SUNRISE_START" "$CURRENT" "$SUNRISE_END" "$NIGHT_TEMP" "$DAY_TEMP")"
+elif [ "$((CURRENT <= SUNSET_START))" = "1" ]; then
+  TEMP="$DAY_TEMP"
+elif [ "$((CURRENT < SUNSET_END))" = "1" ]; then
+  TEMP="$(interpolate "$SUNSET_START" "$CURRENT" "$SUNSET_END" "$DAY_TEMP" "$NIGHT_TEMP")"
+else
+  TEMP="$NIGHT_TEMP"
+fi
+
+# TODO: Figure out a nice way to wait until Hyprland has properly started up before running this
+hyprctl hyprsunset temperature "$TEMP"

systemd/sunset.service

@@ -3,4 +3,4 @@ Description=Sets the monitor temperature based on the time of day
 
 [Service]
 Type=oneshot
-ExecStart=/bin/env python -O /home/mbradley/scripts/sunset.py
+ExecStart=/home/mbradley/scripts/sunset.sh

systemd/sunset.timer

@@ -4,7 +4,7 @@ After=graphical-session.target
 After=hyprsunset.service
 
 [Timer]
-OnCalendar=*:0/5
+OnCalendar=*-*-* *:*:00
 Persistent=true
 AccuracySec=5s