/* * MIT License * * Copyright (c) 2022 Jeremy O'Brien * Base code copied from Spencer Bywater's probability face * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ // Emulator only: need time() to seed the random number generator. #if __EMSCRIPTEN__ #include #endif #include #include #include "tarot_face.h" #define TAROT_ANIMATION_TICK_FREQUENCY 8 #define FLIPPED_BIT_POS 7 #define FLIPPED_MASK ((uint8_t)(1 << FLIPPED_BIT_POS)) // -------------- // Custom methods // -------------- static char major_arcana[][7] = { " FOOL ", "Mgcian", "HPrsts", "En&prs", // Empress "En&por", // Emperor "Hiroph", "Lovers", "Chriot", "Strgth", "Hrn&it", // Hermit " Frtun", "Justce", "Hangn&", // Hangman " Death", " tmprn", " Devil", " Tower", " Star", "n&OON ", // Moon " Sun ", "Jdgmnt", " World", }; #define NUM_MAJOR_ARCANA (sizeof(major_arcana) / sizeof(*major_arcana)) static char suits[][7] = { " wands", " cups", "swords", " coins", }; #define NUM_MINOR_ARCANA 56 #define NUM_CARDS_PER_SUIT 14 #define NUM_TAROT_CARDS (NUM_MAJOR_ARCANA + NUM_MINOR_ARCANA) static void init_deck(tarot_state_t *state) { memset(state->drawn_cards, 0xff, sizeof(state->drawn_cards)); state->current_card = 0; } static void tarot_display(tarot_state_t *state) { char buf[12]; char *start_end_string; uint8_t card; bool flipped; // deck is initialized; show current draw mode and return if (state->drawn_cards[0] == 0xff) { watch_clear_indicator(WATCH_INDICATOR_SIGNAL); if (state->major_arcana_only) { sprintf(buf, "TA%2dn&ajor", state->num_cards_to_draw); } else { sprintf(buf, "TA%2d All", state->num_cards_to_draw); } watch_display_string(buf, 0); return; } // show a special status if we're looking at the first or last card in the spread if (state->current_card == 0) { start_end_string = "St"; } else if (state->current_card == state->num_cards_to_draw - 1) { start_end_string = "En"; } else { start_end_string = " "; } // figure out the card we're showing card = state->drawn_cards[state->current_card]; flipped = (card & FLIPPED_MASK) ? true : false; // check flipped bit card &= ~FLIPPED_MASK; // remove the flipped bit if (card < NUM_MAJOR_ARCANA) { // major arcana // show start/end, no rank, card name sprintf(buf, "%s %s", start_end_string, major_arcana[card]); } else { // minor arcana uint8_t suit = (card - NUM_MAJOR_ARCANA) / NUM_CARDS_PER_SUIT; uint8_t rank = ((card - NUM_MAJOR_ARCANA) % NUM_CARDS_PER_SUIT) + 1; // show start/end, rank + suit sprintf(buf, "%s%2d%s", start_end_string, rank, suits[suit]); } watch_display_string(buf, 0); if (flipped) { watch_set_indicator(WATCH_INDICATOR_SIGNAL); } else { watch_clear_indicator(WATCH_INDICATOR_SIGNAL); } } static uint8_t get_rand_num(uint8_t num_values) { // Emulator: use rand. Hardware: use arc4random. #if __EMSCRIPTEN__ return rand() % num_values; #else return arc4random_uniform(num_values); #endif } static uint8_t draw_one_card(tarot_state_t *state) { if (state->major_arcana_only) { return get_rand_num(NUM_MAJOR_ARCANA); } else { return get_rand_num(NUM_TAROT_CARDS); } } static bool already_drawn(tarot_state_t *state, uint8_t drawn_card) { for (int i = 0; state->drawn_cards[i] != 0xff && i < state->num_cards_to_draw; i++) { if ((state->drawn_cards[i] & ~FLIPPED_MASK) == drawn_card) { return true; } } return false; } static void pick_cards(tarot_state_t *state) { uint8_t card; for (int i = 0; i < state->num_cards_to_draw; i++) { card = draw_one_card(state); while (already_drawn(state, card)) { card = draw_one_card(state); } card |= get_rand_num(2) << FLIPPED_BIT_POS; // randomly flip the card state->drawn_cards[i] = card; } } static void display_animation(tarot_state_t *state) { if (state->animation_frame == 0) { watch_display_string(" ", 7); watch_set_pixel(1, 4); watch_set_pixel(1, 6); state->animation_frame = 1; } else if (state->animation_frame == 1) { watch_clear_pixel(1, 4); watch_clear_pixel(1, 6); watch_set_pixel(2, 4); watch_set_pixel(0, 6); state->animation_frame = 2; } else if (state->animation_frame == 2) { watch_clear_pixel(2, 4); watch_clear_pixel(0, 6); watch_set_pixel(2, 5); watch_set_pixel(0, 5); state->animation_frame = 3; } else if (state->animation_frame == 3) { state->animation_frame = 0; state->is_picking = false; movement_request_tick_frequency(1); tarot_display(state); } } // --------------------------- // Standard watch face methods // --------------------------- void tarot_face_setup(movement_settings_t *settings, uint8_t watch_face_index, void ** context_ptr) { (void) settings; (void) watch_face_index; if (*context_ptr == NULL) { *context_ptr = malloc(sizeof(tarot_state_t)); memset(*context_ptr, 0, sizeof(tarot_state_t)); } // Emulator only: Seed random number generator #if __EMSCRIPTEN__ srand(time(NULL)); #endif } void tarot_face_activate(movement_settings_t *settings, void *context) { (void) settings; tarot_state_t *state = (tarot_state_t *)context; watch_display_string("TA", 0); init_deck(state); state->num_cards_to_draw = 3; state->major_arcana_only = true; } bool tarot_face_loop(movement_event_t event, movement_settings_t *settings, void *context) { (void) settings; tarot_state_t *state = (tarot_state_t *)context; if (state->is_picking && event.event_type != EVENT_TICK) { return true; } switch (event.event_type) { case EVENT_ACTIVATE: tarot_display(state); break; case EVENT_TICK: if (state->is_picking) { display_animation(state); } break; case EVENT_LIGHT_BUTTON_UP: if (state->drawn_cards[0] == 0xff) { // deck is inited; cycle through # cards to draw state->num_cards_to_draw++; if (state->num_cards_to_draw > 10) { state->num_cards_to_draw = 3; } } else { // cycle through the drawn cards state->current_card = (state->current_card + 1) % state->num_cards_to_draw; } tarot_display(state); break; case EVENT_LIGHT_LONG_PRESS: if (state->drawn_cards[0] == 0xff) { // at main screen; cycle major arcana mode state->major_arcana_only = !state->major_arcana_only; } else { // at card view screen; go back to draw screen init_deck(state); } tarot_display(state); break; case EVENT_ALARM_BUTTON_UP: // Draw cards watch_display_string(" ", 4); watch_clear_indicator(WATCH_INDICATOR_SIGNAL); init_deck(state); pick_cards(state); state->is_picking = true; // card picking animation begins on next tick and new cards will be displayed on completion movement_request_tick_frequency(TAROT_ANIMATION_TICK_FREQUENCY); break; case EVENT_LOW_ENERGY_UPDATE: watch_display_string("SLEEP ", 4); break; case EVENT_LIGHT_BUTTON_DOWN: // don't light up every time light is hit break; default: movement_default_loop_handler(event, settings); break; } return true; } void tarot_face_resign(movement_settings_t *settings, void *context) { (void) settings; (void) context; }