qmk-dactyl-manuform-a/quantum/rgb_matrix_animations/raindrops_anim.h

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#ifndef DISABLE_RGB_MATRIX_RAINDROPS
RGB_MATRIX_EFFECT(RAINDROPS)
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# ifdef RGB_MATRIX_CUSTOM_EFFECT_IMPLS
static void raindrops_set_color(int i, effect_params_t* params) {
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if (!HAS_ANY_FLAGS(g_led_config.flags[i], params->flags)) return;
HSV hsv = {0, rgb_matrix_config.hsv.s, rgb_matrix_config.hsv.v};
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// Take the shortest path between hues
int16_t deltaH = ((rgb_matrix_config.hsv.h + 180) % 360 - rgb_matrix_config.hsv.h) / 4;
if (deltaH > 127) {
deltaH -= 256;
} else if (deltaH < -127) {
deltaH += 256;
}
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hsv.h = rgb_matrix_config.hsv.h + (deltaH * (rand() & 0x03));
RGB rgb = hsv_to_rgb(hsv);
rgb_matrix_set_color(i, rgb.r, rgb.g, rgb.b);
}
bool RAINDROPS(effect_params_t* params) {
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if (!params->init) {
// Change one LED every tick, make sure speed is not 0
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if (scale16by8(g_rgb_timer, qadd8(rgb_matrix_config.speed, 16)) % 10 == 0) {
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raindrops_set_color(rand() % DRIVER_LED_TOTAL, params);
}
return false;
}
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RGB_MATRIX_USE_LIMITS(led_min, led_max);
for (int i = led_min; i < led_max; i++) {
raindrops_set_color(i, params);
}
return led_max < DRIVER_LED_TOTAL;
}
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# endif // RGB_MATRIX_CUSTOM_EFFECT_IMPLS
#endif // DISABLE_RGB_MATRIX_RAINDROPS