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day_night_percentage_face: Calculate rise/set/daylen only once per day.

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Wesley Aptekar-Cassels 2023-11-09 17:21:35 -05:00
parent f1d4d4ce89
commit 2e8ee9965e
2 changed files with 54 additions and 36 deletions
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83
movement/watch_faces/clock/day_night_percentage_face.c
View file

@ -29,10 +29,42 @@
#include "watch_utility.h"
#include "sunriset.h"
// fmod but handle negatives right
static double better_fmod(double x, double y) {
return fmod(fmod(x, y) + y, y);
}
static void recalculate(watch_date_time utc_now, day_night_percentage_state_t *state) {
movement_location_t movement_location = (movement_location_t) watch_get_backup_data(1);
if (movement_location.reg == 0) {
state->result = -2;
return;
}
// Weird quirky unsigned things were happening when I tried to cast these directly to doubles below.
// it looks redundant, but extracting them to local int16's seemed to fix it.
int16_t lat_centi = (int16_t)movement_location.bit.latitude;
int16_t lon_centi = (int16_t)movement_location.bit.longitude;
double lat = (double)lat_centi / 100.0;
double lon = (double)lon_centi / 100.0;
state->daylen = day_length(utc_now.unit.year + WATCH_RTC_REFERENCE_YEAR, utc_now.unit.month, utc_now.unit.day, lon, lat);
state->result = sun_rise_set(utc_now.unit.year + WATCH_RTC_REFERENCE_YEAR, utc_now.unit.month, utc_now.unit.day, lon, lat, &state->rise, &state->set);
}
void day_night_percentage_face_setup(movement_settings_t *settings, uint8_t watch_face_index, void ** context_ptr) {
(void) settings;
(void) watch_face_index;
(void) context_ptr;
if (*context_ptr == NULL) {
*context_ptr = malloc(sizeof(day_night_percentage_state_t));
day_night_percentage_state_t *state = (day_night_percentage_state_t *)*context_ptr;
watch_date_time utc_now = watch_utility_date_time_convert_zone(watch_rtc_get_date_time(), movement_timezone_offsets[settings->bit.time_zone] * 60, 0);
recalculate(utc_now, state);
}
}
void day_night_percentage_face_activate(movement_settings_t *settings, void *context) {
@ -40,52 +72,34 @@ void day_night_percentage_face_activate(movement_settings_t *settings, void *con
(void) context;
}
// fmod but handle negatives right
static double better_fmod(double x, double y) {
return fmod(fmod(x, y) + y, y);
}
bool day_night_percentage_face_loop(movement_event_t event, movement_settings_t *settings, void *context) {
(void) context;
day_night_percentage_state_t *state = (day_night_percentage_state_t *)context;
char buf[12];
watch_date_time date_time = watch_rtc_get_date_time();
watch_date_time utc_now = watch_utility_date_time_convert_zone(date_time, movement_timezone_offsets[settings->bit.time_zone] * 60, 0);
switch (event.event_type) {
case EVENT_ACTIVATE:
case EVENT_TICK:
case EVENT_LOW_ENERGY_UPDATE:
{
movement_location_t movement_location = (movement_location_t) watch_get_backup_data(1);
if (movement_location.reg == 0) {
watch_display_string(" no Loc", 0);
return true;
if ((utc_now.unit.hour == 0 && utc_now.unit.minute == 0 && utc_now.unit.second == 0) || state->result == -2) {
recalculate(utc_now, state);
}
watch_date_time date_time = watch_rtc_get_date_time(); // the current local date / time
watch_date_time utc_now = watch_utility_date_time_convert_zone(date_time, movement_timezone_offsets[settings->bit.time_zone] * 60, 0); // the current date / time in UTC
if (state->result == -2) {
watch_display_string(" no Loc", 0);
break;
}
// Weird quirky unsigned things were happening when I tried to cast these directly to doubles below.
// it looks redundant, but extracting them to local int16's seemed to fix it.
int16_t lat_centi = (int16_t)movement_location.bit.latitude;
int16_t lon_centi = (int16_t)movement_location.bit.longitude;
double lat = (double)lat_centi / 100.0;
double lon = (double)lon_centi / 100.0;
double daylen = day_length(utc_now.unit.year + WATCH_RTC_REFERENCE_YEAR, utc_now.unit.month, utc_now.unit.day, lon, lat);
double rise, set;
char buf[12];
int result = sun_rise_set(utc_now.unit.year + WATCH_RTC_REFERENCE_YEAR, utc_now.unit.month, utc_now.unit.day, lon, lat, &rise, &set);
if (result != 0) {
sprintf(buf, "%s%2dEtrnal", result == 1 ? "DA" : "NI", date_time.unit.day);
if (state->result != 0) {
sprintf(buf, "%s%2dEtrnal", state->result == 1 ? "DA" : "NI", date_time.unit.day);
watch_display_string(buf, 0);
} else {
double day_hours_decimal = utc_now.unit.hour + (utc_now.unit.minute + (utc_now.unit.second / 60.0)) / 60.0;
double day_percentage = (24.0 - better_fmod(rise - day_hours_decimal, 24.0)) / daylen;
double night_percentage = (24.0 - better_fmod(set - day_hours_decimal, 24.0)) / (24 - daylen);
double day_percentage = (24.0 - better_fmod(state->rise - day_hours_decimal, 24.0)) / state->daylen;
double night_percentage = (24.0 - better_fmod(state->set - day_hours_decimal, 24.0)) / (24 - state->daylen);
uint16_t percentage;
char day_night[3];
@ -106,7 +120,6 @@ bool day_night_percentage_face_loop(movement_event_t event, movement_settings_t
}
break;
}
default:
return movement_default_loop_handler(event, settings);
}

7
movement/watch_faces/clock/day_night_percentage_face.h
View file

@ -42,7 +42,12 @@
* location register with some other face.
*/
typedef struct {} day_night_percentage_state_t;
typedef struct {
int result; // -1, 0, 1: result from sun_rise_set, -2: no location set
double rise;
double set;
double daylen;
} day_night_percentage_state_t;
void day_night_percentage_face_setup(movement_settings_t *settings, uint8_t watch_face_index, void ** context_ptr);
void day_night_percentage_face_activate(movement_settings_t *settings, void *context);