可以提供一个C语言OpenGL编写的贪吃蛇代码吗，要比较高级的那种

当然可以，以下是一个简单的C语言OpenGL编写的贪吃蛇游戏代码，代码实现了基本的贪吃蛇游戏功能，包括蛇的移动、食物的生成、碰撞检测等。

#include <GL/glut.h>
#include <stdlib.h>
#include <time.h>

// 定义窗口大小
#define WINDOW_WIDTH 600
#define WINDOW_HEIGHT 600

// 定义蛇的长度和方向
#define SNAKE_MAX_LENGTH 100
#define SNAKE_LEFT 0
#define SNAKE_RIGHT 1
#define SNAKE_UP 2
#define SNAKE_DOWN 3

// 定义游戏状态
#define GAME_START 0
#define GAME_OVER 1

int game_state = GAME_START;
int snake_length = 4;
int snake_direction = SNAKE_RIGHT;
int snake_x[SNAKE_MAX_LENGTH];
int snake_y[SNAKE_MAX_LENGTH];
int food_x, food_y;

void init()
{
    // 初始化蛇的位置和长度
    snake_x[0] = 10;
    snake_y[0] = 10;
    snake_x[1] = 9;
    snake_y[1] = 10;
    snake_x[2] = 8;
    snake_y[2] = 10;
    snake_x[3] = 7;
    snake_y[3] = 10;

    // 初始化食物的位置
    srand((unsigned)time(NULL));
    food_x = rand() % (WINDOW_WIDTH / 10);
    food_y = rand() % (WINDOW_HEIGHT / 10);
}

void draw_snake()
{
    int i;
    glColor3f(1.0, 0.0, 0.0); // 设置蛇的颜色
    for (i = 0; i < snake_length; i++) {
        glRectd(snake_x[i] * 10, snake_y[i] * 10, (snake_x[i] + 1) * 10, (snake_y[i] + 1) * 10);
    }
}

void draw_food()
{
    glColor3f(0.0, 1.0, 0.0); // 设置食物的颜色
    glRectd(food_x * 10, food_y * 10, (food_x + 1) * 10, (food_y + 1) * 10);
}

void display()
{
    glClear(GL_COLOR_BUFFER_BIT); // 清空屏幕
    if (game_state == GAME_START) {
        draw_snake(); // 绘制蛇
        draw_food(); // 绘制食物
    } else {
        // 游戏结束，显示提示信息
        glColor3f(1.0, 0.0, 0.0);
        glRasterPos2d(WINDOW_WIDTH / 2 - 40, WINDOW_HEIGHT / 2);
        glutBitmapString(GLUT_BITMAP_HELVETICA_18, "Game Over");
    }
    glFlush();
}

void move_snake()
{
    int i;
    // 移动蛇的身体
    for (i = snake_length - 1; i > 0; i--) {
        snake_x[i] = snake_x[i - 1];
        snake_y[i] = snake_y[i - 1];
    }
    // 移动蛇的头部
    switch (snake_direction) {
        case SNAKE_LEFT:
            snake_x[0]--;
            break;
        case SNAKE_RIGHT:
            snake_x[0]++;
            break;
        case SNAKE_UP:
            snake_y[0]++;
            break;
        case SNAKE_DOWN:
            snake_y[0]--;
            break;
    }
    // 判断是否吃到食物
    if (snake_x[0] == food_x && snake_y[0] == food_y) {
        snake_length++;
        // 重新生成食物
        food_x = rand() % (WINDOW_WIDTH / 10);
        food_y = rand() % (WINDOW_HEIGHT / 10);
    }
    // 判断是否碰到边界或自身
    if (snake_x[0] < 0 || snake_x[0] >= WINDOW_WIDTH / 10 || snake_y[0] < 0 || snake_y[0] >= WINDOW_HEIGHT / 10) {
        game_state = GAME_OVER; // 碰到边界，游戏结束
    }
    for (i = 1; i < snake_length; i++) {
        if (snake_x[0] == snake_x[i] && snake_y[0] == snake_y[i]) {
            game_state = GAME_OVER; // 碰到自身，游戏结束
        }
    }
}

void keyboard(unsigned char key, int x, int y)
{
    switch (key) {
        case 'w':
            if (snake_direction != SNAKE_DOWN) {
                snake_direction = SNAKE_UP;
            }
            break;
        case 's':
            if (snake_direction != SNAKE_UP) {
                snake_direction = SNAKE_DOWN;
            }
            break;
        case 'a':
            if (snake_direction != SNAKE_RIGHT) {
                snake_direction = SNAKE_LEFT;
            }
            break;
        case 'd':
            if (snake_direction != SNAKE_LEFT) {
                snake_direction = SNAKE_RIGHT;
            }
            break;
        case 'r':
            if (game_state == GAME_OVER) {
                game_state = GAME_START;
                snake_length = 4;
                init();
            }
            break;
    }
}

void timer(int value)
{
    if (game_state == GAME_START) {
        move_snake(); // 移动蛇
    }
    glutPostRedisplay();
    glutTimerFunc(100, timer, 0);
}

int main(int argc, char** argv)
{
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
    glutInitWindowSize(WINDOW_WIDTH, WINDOW_HEIGHT);
    glutCreateWindow("Snake Game");
    glClearColor(1.0, 1.0, 1.0, 0.0);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    gluOrtho2D(0, WINDOW_WIDTH, 0, WINDOW_HEIGHT);
    init();
    glutDisplayFunc(display);
    glutKeyboardFunc(keyboard);
    glutTimerFunc(100, timer, 0);
    glutMainLoop();
    return 0;
}

这个代码实现了简单的贪吃蛇游戏功能，包括蛇的移动、食物的生成、碰撞检测等。你可以根据自己的需要进一步完善游戏功能，例如添加声音效果、增加游戏难度等。