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Diffstat (limited to 'users/vitoni/rgb_matrix_effects.c')
| -rw-r--r-- | users/vitoni/rgb_matrix_effects.c | 236 |
1 files changed, 236 insertions, 0 deletions
diff --git a/users/vitoni/rgb_matrix_effects.c b/users/vitoni/rgb_matrix_effects.c new file mode 100644 index 0000000000..3a13e99bc7 --- /dev/null +++ b/users/vitoni/rgb_matrix_effects.c @@ -0,0 +1,236 @@ +// Copyright 2021 Victor Toni (@vitoni) +// SPDX-License-Identifier: GPL-2.0-or-later + +#include "rgb_matrix_effects.h" + +#include <rgb_matrix.h> +#include <lib/lib8tion/lib8tion.h> + +#include "utils.h" + +/* + Offset used to start at the right point in th curve to avoid big jumps in brightness + 0 => 0% (signed) => 50% (unsigned) + 64 => 100% (signed) => 100% (unsigned) + 128 => 0% (signed) => 50% (unsigned) + 192 => -100% (signed) => 0% (unsigned) +*/ +enum PHASE { + PHASE_ZERO_RAISING + ,PHASE_HIGH + ,PHASE_ZERO_FALLING + ,PHASE_LOW +}; + +/** + * @brief Calculates the offset so that a specific time is aligned to a specific point in the sine curve. + * @param[in] time The time for which the offset shopuld be calculated. + * @param[in] phase Phase which should be reached with the offset + * @see PHASE + */ +uint8_t offset_for_time(const uint8_t time, const uint8_t phase) { + switch (phase) { + case PHASE_ZERO_RAISING: + return 0 - time; + case PHASE_HIGH: + return 64 - time; + case PHASE_ZERO_FALLING: + return 128 - time; + case PHASE_LOW: + return 192 - time; + default: + return 0; + } +} + +/** + * @brief Scales down `g_rgb_timer` so that it can be used for RGB effects. + * @return scaled down timer + * @see rgb_time_2_scale_w_factor() + */ +uint8_t rgb_time_2_scale(void) { + static const uint8_t factor = 1; + return rgb_time_2_scale_w_factor(factor); +} + +/* + * Used to slow down RGB speed. + */ +static const uint8_t rgb_speed_divisor = 8; + +/** + * @brief Scales down `g_rgb_timer` so that it can be used for RGB effects. + * @details Usually these calculations aredone internally by some RGB effects. + This method exposed to scaling so that all effects to have same timebase. If `rgb_matrix_config.speed` all effects are affected the same. + * @param[in] factor The factor can be used to speed up some operations in relation to others. + * @return scaled down timer taking into account the given factor + * @see g_rgb_timer + * @see rgb_matrix_config.speed + */ +uint8_t rgb_time_2_scale_w_factor(const uint8_t rgb_speed_factor) { + const uint8_t scaled_time = scale16by8(g_rgb_timer, rgb_matrix_config.speed * rgb_speed_factor / rgb_speed_divisor); + + return scaled_time; +} + +/** + * @brief Inverse function to calculate time required to execute `timer` steps. + * @details This method allows calculation of the time needed to execute N `timer`steps. + Usefull when using a scaled down time but requiring the time needed to perform these steps. + * @param[in] scaled_time scaled down timer to inverse to time + * @return time corresponding to scaled down time + * @see rgb_time_2_scale() + */ +uint16_t scale_2_rgb_time(const uint8_t scaled_time) { + const uint16_t time = scaled_time * rgb_speed_divisor * UINT8_MAX / rgb_matrix_config.speed; + + return time; +} + +bool fade_in_ranged(const uint8_t time, const uint8_t range_min, const uint8_t range_max) { + static const uint8_t max_delta = 1; + return scaled_sin_up(time, range_min, range_max, max_delta, &(rgb_matrix_config.hsv.v)); +} + +bool fade_out_ranged(const uint8_t time, const uint8_t range_min, const uint8_t range_max) { + static const uint8_t max_delta = 1; + return scaled_sin_down(time, range_min, range_max, max_delta, &(rgb_matrix_config.hsv.v)); +} + +/** + * @brief Convenience method to eventually skip the value part when setting HSV. + * @details When setting HSV this includes the value/brightness. + As changing brightness might interfer with fading or breathing effects, + this method can skip the value part of HSV (depending on the preprocessor flag: RGB_FADE_IN). + * @param[in] hue Hue + * @param[in] sat Saturation + * @param[in] hue Value (brightness) + * @see rgb_matrix_sethsv_noeeprom() + */ +void rgb_matrix_sethsv_noeeprom_user(const uint16_t hue, const uint8_t sat, const uint8_t val) { +#if defined(RGB_FADE_IN) || defined(RGB_IDLE_TIMEOUT) + rgb_matrix_config.hsv.h = hue; + rgb_matrix_config.hsv.s = sat; + // omitting setting the value to avoid interfering with effects +// rgb_matrix_config.hsv.v = val; +#else + rgb_matrix_sethsv_noeeprom(hue, sat, val); +#endif +} + +#if defined(RGB_FADE_IN) || defined(RGB_IDLE_TIMEOUT) +/** + * @brief Calculates the time offset required by fade in. + * @details Using an arbitrary timer any point on the sine curve might be pointed to. + * The offest is calculated so that + * a) the point is at the lowest point in the curve and the curve is raising + * b) the point is near the current brightness (eg. fade in might be called while fading out and the lowest value has not yet been reached). + * @param[in] time Current time usually represented by (usually scaled) timer + * @return Offset required so that time matches the current brightness + */ +uint8_t calc_fade_in_offset(const uint8_t time) { + static const uint8_t max_steps = UINT8_MAX/2; + static const uint8_t range_min = 0; + static const uint8_t range_max = RGB_MATRIX_MAXIMUM_BRIGHTNESS; + + // start at the right point in the sine curve + uint8_t time_offset = offset_for_time(time, PHASE_LOW); + + // find the right offset to match the current brightness + for (int i = 1; i < max_steps; i++) { + const uint8_t value = scaled_sin(time + time_offset + 1, range_min, range_max); + if (in_range(value, range_min, range_max) && value < rgb_matrix_config.hsv.v) { + time_offset++; + } else { + break; + } + } + + return time_offset; +} + +/** + * @brief Increases value/brightness until reaching RGB_MATRIX_MAXIMUM_BRIGHTNESS based on given timer. + * @param[in] time A (usually scaled) timer + * @return Returns `true` if RGB_MATRIX_MAXIMUM_BRIGHTNESS has been reached, `false` otherwise. + */ +bool fade_in(const uint8_t time) { + static const uint8_t range_min = 0; + static const uint8_t range_max = RGB_MATRIX_MAXIMUM_BRIGHTNESS; + + return fade_in_ranged(time, range_min, range_max); +} +#endif + +#if defined(RGB_DISABLE_WITH_FADE_OUT) || defined(RGB_IDLE_TIMEOUT) +/** + * @brief Calculates the time offset required by fade out. + * @details Using an arbitrary timer any point on the Sinus curve might be pointed to. + * The offest is calculated so that + * a) the point is at the highest point in the curve and the curve is failing + * b) the point is near the current brightness (eg. fade out might be called while on breath effect). + * @param[in] time Current time usually represented by a(usually scaled) timer + * @return Offset required so that time matches the current brightness + */ +uint8_t calc_fade_out_offset(const uint8_t time) { + static const uint8_t range_min = 0; + static const uint8_t range_max = RGB_MATRIX_MAXIMUM_BRIGHTNESS; + + // start at the right point in the sin() curve + uint8_t time_offset = offset_for_time(time, PHASE_HIGH); + + // find the right offset to match the current brightness + for (int i = 1; i < 127; i++) { + const uint8_t value = scaled_sin(time + time_offset + 1, range_min, range_max); + if (in_range(value, range_min, range_max) && rgb_matrix_config.hsv.v < value) { + time_offset++; + } else { + break; + } + } + + return time_offset; +} +#endif + +#if defined(RGB_DISABLE_WITH_FADE_OUT) +/** + * @brief Decreases value/brightness until reaching 0 based on given timer. + * @param[in] time A (usually scaled) timer + * @return Returns `true` if 0 has been reached, `false` otherwise. + */ +bool fade_out(const uint8_t time) { + static const uint8_t range_min = 0; + static const uint8_t range_max = RGB_MATRIX_MAXIMUM_BRIGHTNESS; + + return fade_out_ranged(time, range_min, range_max); +} +#endif + +#if defined(RGB_IDLE_TIMEOUT) +/** + * @brief Decreases value/brightness until reaching `RGB_IDLE_MINIMUM_BRIGHTNESS` based on given timer. + * @param[in] time A (usually scaled) timer + * @return Returns `true` if `RGB_IDLE_MINIMUM_BRIGHTNESS` has been reached, `false` otherwise. + */ +bool idle_fade_out(const uint8_t time) { + static const uint8_t range_min = RGB_IDLE_MINIMUM_BRIGHTNESS; + static const uint8_t range_max = RGB_MATRIX_MAXIMUM_BRIGHTNESS; + + return fade_out_ranged(time, range_min, range_max); +} + +#if defined(RGB_IDLE_BREATHE) +/** + * @brief Changes value/brightness to create a breathing effect based on given timer. + * @details Brightness will breathe in the range starting from `RGB_IDLE_MINIMUM_BRIGHTNESS` to `RGB_IDLE_MAXIMUM_BRIGHTNESS`. + * @param[in] time A (usually scaled) timer + */ +void idle_breathe(const uint8_t time) { + static const uint8_t range_min = RGB_IDLE_MINIMUM_BRIGHTNESS; + static const uint8_t range_max = RGB_IDLE_MAXIMUM_BRIGHTNESS; + + rgb_matrix_config.hsv.v = scaled_sin(time, range_min, range_max); +} +#endif // RGB_IDLE_BREATHE +#endif // RGB_IDLE_TIMEOUT |