274 lines
12 KiB
C
274 lines
12 KiB
C
/*
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* MIT License
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*
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* Copyright (c) 2022 Joey Castillo
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <math.h>
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#include "astronomy_face.h"
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#include "watch_utility.h"
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#if __EMSCRIPTEN__
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#include <emscripten.h>
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#endif
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#define NUM_AVAILABLE_BODIES 9
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static const char astronomy_available_celestial_bodies[NUM_AVAILABLE_BODIES] = {
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ASTRO_BODY_SUN,
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ASTRO_BODY_MERCURY,
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ASTRO_BODY_VENUS,
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ASTRO_BODY_MOON,
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ASTRO_BODY_MARS,
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ASTRO_BODY_JUPITER,
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ASTRO_BODY_SATURN,
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ASTRO_BODY_URANUS,
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ASTRO_BODY_NEPTUNE
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};
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static const char astronomy_celestial_body_names[NUM_AVAILABLE_BODIES][3] = {
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"SO", // Sol
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"ME", // Mercury
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"VE", // Venus
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"LU", // Moon (Luna)
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"MA", // Mars
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"JU", // Jupiter
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"SA", // Saturn
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"UR", // Uranus
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"NE" // Neptune
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};
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static void _astronomy_face_recalculate(movement_settings_t *settings, astronomy_state_t *state) {
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#if __EMSCRIPTEN__
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int16_t browser_lat = EM_ASM_INT({
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return lat;
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});
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int16_t browser_lon = EM_ASM_INT({
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return lon;
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});
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if ((watch_get_backup_data(1) == 0) && (browser_lat || browser_lon)) {
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movement_location_t browser_loc;
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browser_loc.bit.latitude = browser_lat;
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browser_loc.bit.longitude = browser_lon;
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watch_store_backup_data(browser_loc.reg, 1);
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double lat = (double)browser_lat / 100.0;
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double lon = (double)browser_lon / 100.0;
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state->latitude_radians = astro_degrees_to_radians(lat);
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state->longitude_radians = astro_degrees_to_radians(lon);
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}
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#endif
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watch_date_time date_time = watch_rtc_get_date_time();
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uint32_t timestamp = watch_utility_date_time_to_unix_time(date_time, movement_timezone_offsets[settings->bit.time_zone] * 60);
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date_time = watch_utility_date_time_from_unix_time(timestamp, 0);
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double jd = astro_convert_date_to_julian_date(date_time.unit.year + WATCH_RTC_REFERENCE_YEAR, date_time.unit.month, date_time.unit.day, date_time.unit.hour, date_time.unit.minute, date_time.unit.second);
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astro_equatorial_coordinates_t radec_precession = astro_get_ra_dec(jd, astronomy_available_celestial_bodies[state->active_body_index], state->latitude_radians, state->longitude_radians, true);
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printf("\nParams to convert: %f %f %f %f %f\n",
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jd,
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astro_radians_to_degrees(state->latitude_radians),
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astro_radians_to_degrees(state->longitude_radians),
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astro_radians_to_degrees(radec_precession.right_ascension),
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astro_radians_to_degrees(radec_precession.declination));
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astro_horizontal_coordinates_t horiz = astro_ra_dec_to_alt_az(jd, state->latitude_radians, state->longitude_radians, radec_precession.right_ascension, radec_precession.declination);
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astro_equatorial_coordinates_t radec = astro_get_ra_dec(jd, astronomy_available_celestial_bodies[state->active_body_index], state->latitude_radians, state->longitude_radians, false);
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state->altitude = astro_radians_to_degrees(horiz.altitude);
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state->azimuth = astro_radians_to_degrees(horiz.azimuth);
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state->right_ascension = astro_radians_to_hms(radec.right_ascension);
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state->declination = astro_radians_to_dms(radec.declination);
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state->distance = radec.distance;
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printf("Calculated coordinates for %s on %f: \n\tRA = %f / %2dh %2dm %2ds\n\tDec = %f / %3d° %3d' %3d\"\n\tAzi = %f\n\tAlt = %f\n\tDst = %f AU\n",
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astronomy_celestial_body_names[state->active_body_index],
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jd,
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astro_radians_to_degrees(radec.right_ascension),
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state->right_ascension.hours,
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state->right_ascension.minutes,
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state->right_ascension.seconds,
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astro_radians_to_degrees(radec.declination),
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state->declination.degrees,
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state->declination.minutes,
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state->declination.seconds,
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state->altitude,
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state->azimuth,
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state->distance);
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}
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static void _astronomy_face_update(movement_event_t event, movement_settings_t *settings, astronomy_state_t *state) {
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char buf[16];
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switch (state->mode) {
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case ASTRONOMY_MODE_SELECTING_BODY:
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watch_clear_colon();
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watch_display_string(" Astro", 4);
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if (event.subsecond % 2) {
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watch_display_string((char *)astronomy_celestial_body_names[state->active_body_index], 0);
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} else {
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watch_display_string(" ", 0);
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}
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if (event.subsecond == 0) {
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watch_display_string(" ", 2);
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switch (state->animation_state) {
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case 0:
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watch_set_pixel(0, 7);
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watch_set_pixel(2, 6);
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break;
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case 1:
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watch_set_pixel(1, 7);
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watch_set_pixel(2, 9);
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break;
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case 2:
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watch_set_pixel(2, 7);
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watch_set_pixel(0, 9);
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break;
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}
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state->animation_state = (state->animation_state + 1) % 3;
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}
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break;
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case ASTRONOMY_MODE_CALCULATING:
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watch_clear_display();
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// this takes a moment and locks the UI, flash C for "Calculating"
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watch_start_character_blink('C', 100);
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_astronomy_face_recalculate(settings, state);
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watch_stop_blink();
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state->mode = ASTRONOMY_MODE_DISPLAYING_ALT;
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// fall through
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case ASTRONOMY_MODE_DISPLAYING_ALT:
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sprintf(buf, "%saL%6d", astronomy_celestial_body_names[state->active_body_index], (int16_t)round(state->altitude * 100));
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watch_display_string(buf, 0);
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break;
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case ASTRONOMY_MODE_DISPLAYING_AZI:
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sprintf(buf, "%saZ%6d", astronomy_celestial_body_names[state->active_body_index], (int16_t)round(state->azimuth * 100));
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watch_display_string(buf, 0);
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break;
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case ASTRONOMY_MODE_DISPLAYING_RA:
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watch_set_colon();
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sprintf(buf, "ra H%02d%02d%02d", state->right_ascension.hours, state->right_ascension.minutes, state->right_ascension.seconds);
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watch_display_string(buf, 0);
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break;
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case ASTRONOMY_MODE_DISPLAYING_DEC:
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watch_clear_colon();
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sprintf(buf, "de %3d%2d%2d", state->declination.degrees, state->declination.minutes, state->declination.seconds);
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watch_display_string(buf, 0);
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break;
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case ASTRONOMY_MODE_DISPLAYING_DIST:
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if (state->distance >= 0.00668456) {
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// if >= 1,000,000 kilometers (all planets), we display distance in AU.
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sprintf(buf, "diAU%6d", (uint16_t)round(state->distance * 100));
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} else {
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// otherwise distance in kilometers fits in 6 digits. This mode will only happen for Luna.
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sprintf(buf, "di K%6ld", (uint32_t)round(state->distance * 149597871.0));
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}
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watch_display_string(buf, 0);
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break;
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case ASTRONOMY_MODE_NUM_MODES:
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// this case does not happen, but we need it to silence a warning.
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break;
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}
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}
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void astronomy_face_setup(movement_settings_t *settings, uint8_t watch_face_index, void ** context_ptr) {
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(void) settings;
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(void) watch_face_index;
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if (*context_ptr == NULL) {
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*context_ptr = malloc(sizeof(astronomy_state_t));
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memset(*context_ptr, 0, sizeof(astronomy_state_t));
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}
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}
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void astronomy_face_activate(movement_settings_t *settings, void *context) {
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(void) settings;
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astronomy_state_t *state = (astronomy_state_t *)context;
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movement_location_t movement_location = (movement_location_t) watch_get_backup_data(1);
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int16_t lat_centi = (int16_t)movement_location.bit.latitude;
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int16_t lon_centi = (int16_t)movement_location.bit.longitude;
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double lat = (double)lat_centi / 100.0;
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double lon = (double)lon_centi / 100.0;
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state->latitude_radians = astro_degrees_to_radians(lat);
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state->longitude_radians = astro_degrees_to_radians(lon);
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movement_request_tick_frequency(4);
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}
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bool astronomy_face_loop(movement_event_t event, movement_settings_t *settings, void *context) {
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astronomy_state_t *state = (astronomy_state_t *)context;
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switch (event.event_type) {
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case EVENT_ACTIVATE:
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case EVENT_TICK:
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_astronomy_face_update(event, settings, state);
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break;
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case EVENT_ALARM_BUTTON_UP:
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switch (state->mode) {
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case ASTRONOMY_MODE_SELECTING_BODY:
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// advance to next celestial body (move to calculations with a long press)
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state->active_body_index = (state->active_body_index + 1) % NUM_AVAILABLE_BODIES;
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break;
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case ASTRONOMY_MODE_CALCULATING:
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// ignore button press during calculations
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break;
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case ASTRONOMY_MODE_DISPLAYING_DIST:
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// at last mode, wrap around
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state->mode = ASTRONOMY_MODE_DISPLAYING_ALT;
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break;
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default:
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// otherwise, advance to next mode
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state->mode++;
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break;
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}
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_astronomy_face_update(event, settings, state);
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break;
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case EVENT_ALARM_LONG_PRESS:
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if (state->mode == ASTRONOMY_MODE_SELECTING_BODY) {
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// celestial body selected! this triggers a calculation in the update method.
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state->mode = ASTRONOMY_MODE_CALCULATING;
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movement_request_tick_frequency(1);
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_astronomy_face_update(event, settings, state);
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} else if (state->mode != ASTRONOMY_MODE_CALCULATING) {
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// in all modes except "doing a calculation", return to the selection screen.
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state->mode = ASTRONOMY_MODE_SELECTING_BODY;
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movement_request_tick_frequency(4);
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_astronomy_face_update(event, settings, state);
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}
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break;
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case EVENT_TIMEOUT:
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movement_move_to_face(0);
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break;
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case EVENT_LOW_ENERGY_UPDATE:
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// TODO?
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break;
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default:
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movement_default_loop_handler(event, settings);
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break;
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}
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return true;
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}
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void astronomy_face_resign(movement_settings_t *settings, void *context) {
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(void) settings;
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astronomy_state_t *state = (astronomy_state_t *)context;
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state->mode = ASTRONOMY_MODE_SELECTING_BODY;
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}
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