刚学OpenGL的时候，写的一个最简单的贪吃蛇游戏代码 如下：
//贪吃蛇游戏 #include<stdio.h> #include<stdlib.h> #include<gl/GLUT.H> #include<time.h> #define UP 10 //上 #define DOWN -10//下 #define LEFT -1//左 #define RIGHT 1//右 #define NODE_WIDTH 10;//蛇身节点正方形的宽度 #define STEP_SIZE 10;//运动步长 #define PANEL_WIDTH 500;//面板长度 #define PANEL_HEIGHT 400;//面板宽度 int dir = RIGHT;//运动方向,初始化为右 struct node//节点结构 { int x;//x坐标 int y;//y坐标 struct node *prev;//前一个节点 struct node *next;//后一个节点 }; struct snake//蛇结构 { struct node *head;//头部 struct node *tail;//尾部 int node_count;//节点个数 }; struct snake *sn;//蛇 struct node *food;//食物 void snake_init()//蛇的初始化 { sn = (struct snake *)malloc(sizeof(struct snake)); food = (struct node *)malloc(sizeof(struct node)); food->x = 150; food->y = 100; node *head = (struct node *)malloc(sizeof(struct node)); node *tail = (struct node *)malloc(sizeof(struct node)); head->x = 100; head->y = 100; tail->x = 90; tail->y = 100; head->next = tail; tail->prev = head; sn->head = head; sn->tail = tail; sn->node_count = 2; } //添加一个节点到头部 void add_head(node *n) { n->next = sn->head; sn->head->prev = n; sn->head = n; } //删除尾部 void remove_tail() { node *old_tail = sn->tail; sn->tail = sn->tail->prev;//重新指定尾节点 free(old_tail);//释放删除的尾节点 } bool snake_contain(int x, int y) { node *node = sn->head; for (int i = 0; i < sn->node_count; i++) { if ((abs(node->x - x)<=6&&abs(node->y - y)<=6))//食物与蛇身的距离不能同时小于6才不会碰到，反正同时小于6就会包含 { return true; } node = node->next; } return false; } //新食物 void new_food() { int width = PANEL_WIDTH; int height = PANEL_HEIGHT; int node_width = NODE_WIDTH; int x = rand()%width; int y = rand()%height; //要满足的条件 // x < PANEL_WIDTH - NODE_WIDTH; PANEL_HEIGHT-NODE_WIDTH< y // abs(x- sn->head)&&abs(x->) while (snake_contain(x, y) && x < (height - node_width) && y>(height - node_width)) { x = rand()%PANEL_WIDTH; y = rand()%PANEL_HEIGHT; } food->x = x; food->y = y; } bool is_eat(node * n) { return abs(n->x - food->x)<6 &&abs(n->y - food->y)<6 ; } //前进 void step(int go_dir) { if ((dir + go_dir) != 0)//如果不是朝相反的方向 { dir = go_dir; //求蛇运动下一步的坐标点,这里运用了数字技巧 int x = sn->head->x + (dir%10)*STEP_SIZE; int y = sn->head->y + (dir/10)*STEP_SIZE; struct node *n = (struct node *)malloc(sizeof(struct node)); n->x = x; n->y = y; if (is_eat(n)) { add_head(n); new_food(); sn->node_count++; } else { add_head(n); remove_tail(); } } } //重绘 void repaint(int a) { //画蛇身 node *node = sn->head; for (int i = 0; i < sn->node_count; i++) { int x = node->x; int y = node->y; int lx = x-NODE_WIDTH; int ly = y; int rx = x; int ry = y-NODE_WIDTH; //glColor3f(1.0f, 0.0f, 0.0f); glRectf(lx,ly,rx,ry); node = node->next; } //画食物 int lx = food->x - NODE_WIDTH; int ly = food->y; int rx = food->x; int ry = food->y - NODE_WIDTH; glRectf(lx,ly,rx,ry); } void time_func(int a) { step(dir); glutPostRedisplay();//重绘 glutTimerFunc(100,time_func,0); } void Initial(void) { glClearColor(1.0f, 1.0f, 1.0f, 1.0f); //设置窗口背景色为白色 glMatrixMode(GL_PROJECTION); gluOrtho2D(0.0,500.0,0.0,400.0); } void Display(void) { glClear(GL_COLOR_BUFFER_BIT);//用当前背景色填充窗口 glColor3f(1.0f, 0.0f, 0.0f);//设置当前的绘图颜色为红色 //glRectf(50.0f, 100.0f, 60.0f, 90.0f);//绘制一个矩形 /*glBegin(GL_TRIANGLES); glColor3f(1, 1, 0); glVertex2f(250, 400); glColor3f(0, 1, 1); glVertex2f(50, 300); glColor3f(1, 0, 1); glVertex2f(450, 300); glEnd(); */ repaint(dir); glFlush(); } void key_turn(unsigned char key, int x, int y) { switch (key) { case 'w': step(UP); break; case 's': step(DOWN); break; case 'a': step(LEFT); break; case 'd': step(RIGHT); break; } } int main(int argc, char* argv[]) { glutInit(&argc, argv); snake_init(); glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB);//初始化窗口的显示模式 glutInitWindowSize(500, 400);//设置窗口的尺寸 glutInitWindowPosition(100, 120); //设置窗口的位置 glutCreateWindow("矩形"); //创建一个名为矩形的窗口 glutDisplayFunc(Display); Initial(); glutKeyboardFunc(key_turn); glutTimerFunc(100,time_func,0);//计数器 glutMainLoop(); return 0; }