qmk-firmware/quantum/rgb_matrix_animations/cycle_spiral_anim.h

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#ifndef DISABLE_RGB_MATRIX_CYCLE_SPIRAL
RGB_MATRIX_EFFECT(CYCLE_SPIRAL)
#ifdef RGB_MATRIX_CUSTOM_EFFECT_IMPLS
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static void CYCLE_SPIRAL_math(HSV* hsv, int16_t dx, int16_t dy, uint8_t dist, uint8_t time) {
hsv->h = dist - time - atan2_8(dy, dx);
}
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bool CYCLE_SPIRAL(effect_params_t* params) {
return effect_runner_dx_dy_dist(params, &CYCLE_SPIRAL_math);
}
#endif // RGB_MATRIX_CUSTOM_EFFECT_IMPLS
#endif // DISABLE_RGB_MATRIX_CYCLE_SPIRAL