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qmk_firmware/quantum/rgb_matrix/animations/hue_pendulum_anim.h

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#ifdef ENABLE_RGB_MATRIX_HUE_PENDULUM
RGB_MATRIX_EFFECT(HUE_PENDULUM)
# ifdef RGB_MATRIX_CUSTOM_EFFECT_IMPLS
// Change huedelta to adjust range of hue change. 0-255.
// Looks better with a low value and slow speed for subtle change.
// Hue Pendulum - color changes in a wave to the right before reversing direction
static HSV HUE_PENDULUM_math(HSV hsv, uint8_t i, uint8_t time) {
uint8_t huedelta = 12;
hsv.h = hsv.h + scale8(abs8(sin8(time) + (g_led_config.point[i].x) - 128) * 2, huedelta);
return hsv;
}
bool HUE_PENDULUM(effect_params_t* params) {
return effect_runner_i(params, &HUE_PENDULUM_math);
}
# endif // RGB_MATRIX_CUSTOM_EFFECT_IMPLS
#endif // DISABLE_RGB_HUE_PENDULUM