56 lines
1.6 KiB
C
56 lines
1.6 KiB
C
#include "snake.h"
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#include <stdlib.h>
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// Pridá novú odmenu na náhodnú voľnú pozíciu v rámci hracej plochy
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void add_food(struct state* state) {
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int placed = 0;
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while (!placed) {
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int x = rand() % state->width;
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int y = rand() % state->height;
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if (!is_snake(state->snake, x, y)) {
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state->foodx[state->foods] = x;
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state->foody[state->foods] = y;
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state->foods++;
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placed = 1;
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}
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}
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}
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int step_state(struct state* state) {
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// Vypočíta novú pozíciu hlavy hada
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int new_x = state->snake->x + state->sx;
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int new_y = state->snake->y + state->sy;
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// Overí, či je nová pozícia mimo hracej plochy
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if (new_x < 0 || new_x >= state->width || new_y < 0 || new_y >= state->height) {
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return END_WALL;
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}
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// Overí, či je nová pozícia na tele hada
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if (is_snake(state->snake, new_x, new_y)) {
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return END_SNAKE;
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}
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// Overí, či je na novej pozícii odmena
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for (int i = 0; i < FOOD_COUNT; i++) {
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if (state->foodx[i] == new_x && state->foody[i] == new_y) {
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state->foodx[i] = -1;
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state->foody[i] = -1;
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state->foods_eaten++;
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add_food(state); // Pridá novú odmenu
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state->snake = add_snake(state->snake, new_x, new_y);
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if (state->foods_eaten == FOOD_COUNT) {
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return END_FOOD;
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} else {
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return END_CONTINUE;
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}
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}
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}
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// Odstráni poslednú časť hada
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state->snake = add_snake(state->snake, new_x, new_y);
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state->snake = remove_snake(state->snake);
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return END_CONTINUE;
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}
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