diff options
| author | Jean-François Milants <jf@codingfield.com> | 2025-12-29 22:25:53 +0100 |
|---|---|---|
| committer | JF <JF002@users.noreply.github.com> | 2026-01-05 13:19:06 +0100 |
| commit | a277316f98aee49d00e51778a71760a531f1f94e (patch) | |
| tree | ae7155d84063eb49ac0c323e90b8ac9ecfb42ea9 | |
| parent | c2e59583e19bdb2596a09717a91c77e61366a019 (diff) | |
WatchFaceTerminal : Apply better curve in BatteryIcon::ColorFromPercentage() so the color doesn't start going yellow until the battery is low.
| -rw-r--r-- | src/displayapp/screens/BatteryIcon.cpp | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/src/displayapp/screens/BatteryIcon.cpp b/src/displayapp/screens/BatteryIcon.cpp index ec740e93..8ebb1f54 100644 --- a/src/displayapp/screens/BatteryIcon.cpp +++ b/src/displayapp/screens/BatteryIcon.cpp @@ -1,5 +1,6 @@ -#include "displayapp/screens/BatteryIcon.h" #include <cstdint> +#include <cmath> +#include "displayapp/screens/BatteryIcon.h" #include "displayapp/screens/Symbols.h" #include "displayapp/icons/battery/batteryicon.c" #include "displayapp/InfiniTimeTheme.h" @@ -58,6 +59,8 @@ lv_color_t BatteryIcon::ColorFromPercentage(int batteryPercent) { // We lock saturation and brightness at 100% and traverse the cylinder // between red and green, thus avoiding the darker RGB on medium battery // charges and giving us a much nicer color range. - const uint8_t hue = batteryPercent * 120 / 100; + const float normalizedPercent = batteryPercent / 100.0f; + // Follow -e^{-4x} + 1 curve: begins going yellow around 25%, yellow around 15%, red around 5% + const uint8_t hue = (-std::exp(-4.0f * normalizedPercent) + 1.0f) * 120.0f; return lv_color_hsv_to_rgb(hue, 100, 100); } |