85 lines
2.5 KiB
C
85 lines
2.5 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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#include "snake.h"
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// Global variables to store the direction of the snake
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int sx = 0; // Horizontal speed
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int sy = 0; // Vertical speed
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// Function to move the snake based on the direction
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void move_snake(struct snake* head) {
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// Update the position of the head based on the current speed
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head->x += sx;
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head->y += sy;
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}
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// Function to update the direction of the snake based on user input
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void update_direction(int direction) {
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switch(direction) {
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case KEY_UP:
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sx = 0;
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sy = -1;
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break;
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case KEY_DOWN:
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sx = 0;
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sy = 1;
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break;
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case KEY_LEFT:
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sx = -1;
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sy = 0;
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break;
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case KEY_RIGHT:
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sx = 1;
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sy = 0;
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break;
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default:
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break;
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}
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}
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// Function to handle collision detection and game logic
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int handle_collision(struct state* state) {
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// Check if the new head position is within the bounds of the game area
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if (state->snake->x < 0 || state->snake->x >= state->width || state->snake->y < 0 || state->snake->y >= state->height) {
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return END_WALL; // End game if the head hits the wall
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}
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// Check if the new head position overlaps with the snake's body
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if (is_snake(state->snake, state->snake->x, state->snake->y)) {
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return END_SNAKE; // End game if the head collides with the snake's body
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}
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// Check if the new head position overlaps with any food item
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for (int i = 0; i < FOOD_COUNT; i++) {
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if (state->foodx[i] == state->snake->x && state->foody[i] == state->snake->y) {
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// Mark the food item as eaten
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state->foodx[i] = -1;
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state->foody[i] = -1;
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return END_CONTINUE; // Continue game if the snake eats food
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}
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}
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// If none of the above conditions are met, continue the game
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return END_CONTINUE;
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}
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// Function to initialize the game world
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void initialize_world(struct state* state) {
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// Initialize random seed
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srand(time(NULL));
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// Place the snake in the center of the game area
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state->snake = malloc(sizeof(struct snake));
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state->snake->x = state->width / 2;
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state->snake->y = state->height / 2;
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state->snake->next = NULL;
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// Place 20 food items randomly in the game area
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for (int i = 0; i < FOOD_COUNT; i++) {
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state->foodx[i] = rand() % state->width;
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state->foody[i] = rand() % state->height;
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}
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}
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