Updated: it's looking better
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168ecb7488
commit
2cbeea0de9
3 changed files with 65 additions and 56 deletions
BIN
serpent
Executable file
BIN
serpent
Executable file
Binary file not shown.
109
serpent.c
109
serpent.c
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@ -30,10 +30,6 @@
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#include "serpent.h"
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/* */
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/* Absolute value macro */
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#define ABS(x) (x) < 0 ? -(x) : (x)
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/* */
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// Variable to track if snake is alive
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bool is_alive = true;
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@ -88,17 +84,17 @@ int main (int argc, char **argv) {
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}
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// Initialize board
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board_t gameBoard = {
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board_t board = {
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.border = BOARD_CHAR,
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.boardHeight = SCREEN_HEIGHT,
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.boardWidth = SCREEN_WIDTH
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};
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/* Initialize the snake doubly-linked list */
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snake = startSnake(&gameBoard);
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snake = startSnake(&board);
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/* Initialize the apple */
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apple = startApple(&gameBoard);
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apple = startApple(&board);
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/* Initialize window settings with ncurses */
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initscr();
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@ -107,6 +103,13 @@ int main (int argc, char **argv) {
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keypad(stdscr, TRUE);
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curs_set(0);
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nodelay(stdscr, TRUE);
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/* Check if the board size is greater than the screen size */
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if (board.boardWidth > COLS || board.boardHeight > LINES) {
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endwin();
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printf("ERROR: Board size is larger than the terminal window.\n");
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return 1;
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}
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while (is_alive) {
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/* Take arrow key inputs */
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@ -116,10 +119,10 @@ int main (int argc, char **argv) {
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}
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/* Update the snake position */
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moveSnake(&gameBoard);
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moveSnake(&board);
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/* Redraw the frame */
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draw(&gameBoard);
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draw(&board);
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/* Refresh the window */
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refresh();
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@ -163,8 +166,8 @@ snake_t *startSnake(board_t *board) {
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head->prev = NULL;
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head->next = NULL;
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head->pX = board->boardWidth / 2 + 1;
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head->pY = board->boardHeight / 2 + 1;
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head->pX = board->boardWidth / 2;
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head->pY = board->boardHeight / 2;
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snake_node *node = head;
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for (int i = 1; i < START_SNAKE_SIZE; i++) {
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@ -205,11 +208,9 @@ bool snakeOccupies(int x, int y, bool excludeHead) {
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}
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while (snake_ptr != NULL) {
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if (snake_ptr->pX == x && snake_ptr->pY == y) {
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return true;
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}
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snake_ptr = snake_ptr->next;
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}
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@ -230,28 +231,24 @@ int snakeSize() {
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apple_t *startApple(board_t *board) {
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apple_t *new_apple = malloc(sizeof(apple_t));
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srandom(time(NULL));
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srand(time(NULL));
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do {
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new_apple->pX = random() % board->boardWidth + 1;
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} while (new_apple->pX == board->boardHeight / 2 + 1);
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new_apple->pY = random() % board->boardHeight + 1;
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new_apple->pX = (random() % (board->boardWidth - 2)) + 1;
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new_apple->pY = (random() % (board->boardHeight - 2)) + 1;
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} while (snakeOccupies(new_apple->pX, new_apple->pY, false));
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return new_apple;
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}
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void moveApple(board_t *board) {
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int new_x;
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int new_y;
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int new_x, new_y;
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do {
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new_x = random() % board->boardWidth + 1;
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new_y = random() % board->boardHeight + 1;
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new_x = (random() % (board->boardWidth - 2)) + 1;
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new_y = (random() % (board->boardHeight - 2)) + 1;
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} while (snakeOccupies(new_x, new_y, true));
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apple->pX = new_x;
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apple->pY = new_y;
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}
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@ -295,12 +292,17 @@ void handleInput(int key) {
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}
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}
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void moveSnake (board_t *board) {
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void moveSnake(board_t *board) {
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if ((ABS(snake->dX) > 0) || (ABS(snake->dY) > 0)) {
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if (!appleOccupies(snake->head->pX + snake->dX, snake->head->pY + snake->dY)) {
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snake->tail->pX = snake->head->pX + snake->dX;
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snake->tail->pY = snake->head->pY + snake->dY;
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int new_head_x = snake->head->pX + snake->dX;
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int new_head_y = snake->head->pY + snake->dY;
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if (!appleOccupies(new_head_x, new_head_y)) {
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// Move the tail to the new position
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snake->tail->pX = new_head_x;
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snake->tail->pY = new_head_y;
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// Update the links in the snake
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snake->tail->next = snake->head;
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snake->head->prev = snake->tail;
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@ -311,40 +313,44 @@ void moveSnake (board_t *board) {
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snake->head = snake->head->prev;
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} else {
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// The snake eats the apple
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moveApple(board);
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// Create a new head node
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snake_node *new_head = malloc(sizeof(snake_node));
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new_head->pX = snake->head->pX + snake->dX;
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new_head->pY = snake->head->pY + snake->dY;
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new_head->pX = new_head_x;
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new_head->pY = new_head_y;
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new_head->prev = NULL;
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new_head->next = snake->head;
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// Update the links in the snake
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snake->head->prev = new_head;
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snake->head = new_head;
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// Append a new node to the snake
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appendSnakeNode(snake);
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}
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if (snakeOccupies(snake->head->pX, snake->head->pY, false)) {
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is_alive = false;
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}
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if ((snake->head->pX == 0) || (snake->head->pX == board->boardWidth + 1)) {
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is_alive = false;
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}
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if ((snake->head->pY == 0) || (snake->head->pY == board->boardHeight + 1)) {
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// Check for collisions and update the snake
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if (snakeOccupies(new_head_x, new_head_y, false) ||
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(new_head_x == 0) || (new_head_x == board->boardWidth - 1) ||
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(new_head_y == 0) || (new_head_y == board->boardHeight - 1)) {
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is_alive = false;
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}
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}
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}
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void draw(board_t *board) {
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mvprintw(0, 0, "%c", board->border);
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erase();
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int i, j;
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for (int i = 0; i < board->boardHeight; i++) {
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mvaddch(i + 1, 0, board->border);
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mvaddch(i + 1, board->boardWidth + 1, board->border);
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for (int j = 0; j < board->boardWidth; j++) {
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mvaddch(i + 1, j + 1, ' ');
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for (i = 0; i < board->boardHeight; i++) {
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for (j = 0; j < board->boardWidth; j++) {
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if (i == 0 || i == board->boardHeight - 1) {
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mvprintw(i, j, "%c", board->border);
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} else if (j == 0 || j == board->boardWidth - 1) {
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mvprintw(i, j, "%c", board->border);
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}
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}
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}
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@ -368,7 +374,6 @@ void draw(board_t *board) {
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mvaddch(apple->pY, apple->pX, FOOD);
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mvprintw(board->boardHeight + 1, 0, "%c", board->border);
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mvprintw(board->boardHeight + 3, 0, "Score: %d", snakeSize() - START_SNAKE_SIZE);
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}
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12
serpent.h
12
serpent.h
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#define VERSION 0.1
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/* */
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/* Absolute value macro */
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#define ABS(x) (x) < 0 ? -(x) : (x)
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/* */
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/* global variables/constants */
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#define START_SNAKE_SIZE 5 /* snake's initial size */
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#define START_SNAKE_SIZE 2 /* snake's initial size */
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#define SNAKE_BODY '*' /* snake's body */
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#define SNAKE_HEAD_U 'v' /* head when going up */
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#define SNAKE_HEAD_D '^' /* head when going down */
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#define SNAKE_HEAD_L '>' /* head when going left */
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#define SNAKE_HEAD_R '<' /* head when going right */
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#define FOOD '@' /* normal food */
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#define BOARD_CHAR '+' /* character at corners of border */
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#define SCREEN_WIDTH 30 /* the virtual screen width */
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#define SCREEN_HEIGHT 20 /* the virtual screen height */
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#define BOARD_CHAR '#' /* character at corners of border */
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#define SCREEN_WIDTH 40 /* the virtual screen width */
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#define SCREEN_HEIGHT 30 /* the virtual screen height */
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#define SPEED 100 /* speed of the game */
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/* */
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