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#include "snake.h"
#include <stdlib.h>
#include <stdbool.h>
#include <time.h>
static bool position_in_snake(Point point, const Snake *snake) {
for (PointList *i = snake->tail; i != NULL; i = i->next) {
if (point.x == i->point.x && point.y == i->point.y) {
return true;
}
}
return false;
}
static bool point_out_of_bounds(Point point, const Map* map) {
if (point.x >= map->width || point.y >= map->height)
return true;
return false;
}
static void spawn_fruit(Map *map) {
if (map->snake->length >= map->width * map->height) return;
Point point;
do {
point.x = rand() % map->width;
point.y = rand() % map->height;
} while(position_in_snake(point, map->snake));
map->fruit.x = point.x;
map->fruit.y = point.y;
map->fruit_eaten = false;
}
void free_snake(Snake *snake) {
while(snake->tail != NULL) {
PointList *tmp = snake->tail;
snake->tail = snake->tail->next;
free(tmp);
}
free(snake);
}
/*⠀⠀⠀⢘⠀⡂⢠⠆⠀⡰⠀⡀⢀⣠⣶⣦⣶⣶⣶⣶⣾⣿⣿⡿⢀⠈⢐⠈⠀⠀
*⠀⠀⠀⡃⠀⡀⣞⡇⢰⠃⣼⣇⠀⣿⣿⣿⣿⣿⣿⣿⣿⣿⠛⣰⣻⡀⢸⠀⠀⠀
*⠀⠀⢐⢀⠀⣛⣽⣇⠘⢸⣿⣿⣷⣾⣿⣿⣿⣿⣿⣿⠟⢡⣾⣿⢿⡇⠀⡃⠀⠀
*⠀⠀⢐⠀⠀⢳⣿⡯⡞⣾⣿⣿⣿⣿⣿⣿⢿⣿⠟⢁⣴⣿⣿⣿⡜⢷⠀⢘⠄⠀
*⠀⠀⠂⡂⠸⡆⠙⠛⡵⣿⣿⣿⣿⣿⡿⠤⠛⣠⣴⣿⣿⠿⣟⣟⠟⢿⡆⢳⠀⠀
*⠀⠀⠸⠁⠀⡾⠁⠀⠀⠀⠀⠉⠉⠉⠈⣠⡌⢁⠄⡛⠡⠉⠍⠙⢳⢾⠁⢸⠀⠀
*⠀⠀⢈⠀⢀⠌⠀⠀⠀⠀⠀⠀⠀⠀⢀⣤⣷⡎⠙⢬⣳⣪⡯⢜⣷⢸⠂⡈⠄⠀
*⠀⠀⠐⡀⠀⢣⠀⠀⠀⠀⠀⠀⠀⣴⣿⣾⣷⢿⢻⣅⣌⡯⢛⣿⣿⡞⠠⡁⠂⠀
*⠀⠀⠀⠄⠀⢉⡀⠀⠀⢀⡠⠤⠼⣇⣳⣿⣿⣟⡜⣿⣿⣿⣿⣿⣿⡇⠸⠡⠀⠀
*⠀⠀⡀⠅⠀⠃⢀⡀⣿⡹⠗⢀⠛⠥⣺⣿⣿⡝⢹⣸⣿⣿⣿⣿⡏⠠⠰⠈⠐⠀
*⠠⠈⠀⠄⣀⠀⠀⠸⠻⠦⠀⠀⠀⠀⠀⠉⠐⠀⠘⠻⢹⣿⡿⠃⠀⡀⠕⣈⠡⡄
*⠀⠀⣴⡀⣬⠁⠀⠀⡁⠂⠀⣀⣀⠔⠌⠤⣀⡀⠀⠀⡈⢸⠪⠀⠀⡌⠤⠈⡀⣠
*⠀⠀⣿⣿⣾⡇⠀⠀⠀⣴⢫⣾⠃⠠⢰⣶⣴⠶⣿⣦⠀⠀⠀⢄⣂⠀⠀⠰⠀⠙
*⠀⠀⠉⠛⠛⠀⢀⣴⣿⢗⡟⠡⣄⣀⡀⠀⢀⣤⠞⡅⠀⠁⠀⡾⠀⠀⠠⡗⠀⢀
*⠀⠀⠀⠀⠀⣴⡿⢋⠔⠃⠀⠀⠍⠙⠉⠈⠑⠁⠂⠀⠀⠀⡡⡁⣠⡼⣸⠅⠀⠘
*⠀⠀⠀⣼⠛⢡⠔⠁⠐⣆⠀⠀⠀⠀⠀⠀⠀⠀⠁⢀⡔⡞⢛⣿⡿⠃⠏⠀⠀⢠
*⠀⠀⠀⠈⠗⠀⠀⠀⠀⠘⣷⣀⢀⣀⣀⠀⡀⢀⣌⡧⠂⠀⡞⠛⡟⠀⠀⠀⡠⠜
*⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠙⠓⠈⠙⠙⠋⠉⠁⠀⠀⠀⠀⠀⠀⠀⡂⠠⠤⢶
*/
Snake *create_snake(unsigned int x, unsigned int y, Direction direction) {
Snake *snake = malloc(sizeof(Snake));
if (snake == NULL) return NULL;
snake->head = malloc(sizeof(PointList));
if (snake->head == NULL) {
free(snake);
return NULL;
}
snake->length = 1;
snake->tail = snake->head;
snake->head->point.x = x;
snake->head->point.y = y;
snake->moving_direction = direction;
return snake;
}
Map *create_map(unsigned int width, unsigned int height) {
srand(time(NULL));
Map *map = malloc(sizeof(Map));
if (map == NULL) return NULL;
map->width = width;
map->height = height;
unsigned int snake_x = rand() % width;
unsigned int snake_y = rand() % height;
Direction snake_dir;
if (rand() % 2 == 0) {
if (snake_x > width / 2) {
snake_dir = WEST;
} else {
snake_dir = EAST;
}
} else {
if (snake_y > height / 2) {
snake_dir = NORTH;
} else {
snake_dir = SOUTH;
}
}
Snake *snake = create_snake(snake_x, snake_y, snake_dir);
if (snake == NULL) {
free_snake(snake);
return NULL;
}
map->snake = snake;
spawn_fruit(map);
return map;
}
bool move_snake(Map *map) {
PointList *neohead = malloc(sizeof(PointList));
if (neohead == NULL) {
exit(1);
}
neohead->point = map->snake->head->point;
neohead->next = NULL;
switch(map->snake->moving_direction) {
case NORTH:
neohead->point.y--;
break;
case WEST:
neohead->point.x--;
break;
case EAST:
neohead->point.x++;
break;
case SOUTH:
neohead->point.y++;
break;
break;
}
if (point_out_of_bounds(neohead->point, map)) return false;
if (position_in_snake(neohead->point, map->snake)) return false;
map->snake->head->next = neohead;
map->snake->head = neohead;
if (neohead->point.x == map->fruit.x && neohead->point.y == map->fruit.y && !map->fruit_eaten) {
map->fruit_eaten = true;
map->snake->length++;
spawn_fruit(map);
} else {
PointList *tmp = map->snake->tail;
map->snake->tail = map->snake->tail->next;
free(tmp);
}
return true;
}
void free_map(Map *map) {
free_snake(map->snake);
free(map);
}
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