diff --git a/src/kaleidoscope/plugin/LED-Stalker.cpp b/src/kaleidoscope/plugin/LED-Stalker.cpp index e18598f0..c913e896 100644 --- a/src/kaleidoscope/plugin/LED-Stalker.cpp +++ b/src/kaleidoscope/plugin/LED-Stalker.cpp @@ -105,27 +105,28 @@ cRGB Haunt::compute(uint8_t *step) { // BlazingTrail BlazingTrail::BlazingTrail(void) { } +uint8_t hue_start = 50.0 / 360 * 0xff; +uint8_t hue_end = 0; cRGB BlazingTrail::compute(uint8_t *step) { cRGB color; - if (*step >= 0xff - 30) { - color = hsvToRgb(0xff - *step, 255, 255); - } else { - color = hsvToRgb(30, 255, 255); + // Get a float from 0 to 1 for our position in the animation + float pos = (0xff - *step) / (float) 0xff; - color.r = min(*step * color.r / 255, 255); - color.g = min(*step * color.g / 255, 255); - } + // Fade hue linearly from orange to red + uint8_t hue = hue_start + pos * (hue_end - hue_start); - if (*step >= 0xff - 30) - *step -= 1; - else if (*step >= 0x40) - *step -= 16; - else if (*step >= 32) - *step -= 32; - else + // Fade value from full following a -x^4+1 curve + uint8_t val = 0xff * (1 - pos * pos * pos * pos); + + color = hsvToRgb(hue, 0xff, val); + + if (*step < 4) { *step = 0; + } else { + *step -= 4; + } return color; }