C语言OpenGL贪吃蛇小程序

#include <stdio.h> #include <windows.h> #include <gl\glut.h> #include "snake.h" #define SPEED 80 float X_Gl(float x) { float xgl; xgl = x/WIN_X*2 - 1.0f; return xgl; } float Y_Gl(float y) { return 1.0f - y/WIN_Y*2; } void DrawUnitBody(int x, int y) { float a,b,c,d; a = X_Gl((x-0.5)*LEN_PER_X); b = Y_Gl((y-0.5)*LEN_PER_Y); c = X_Gl((x+0.5)*LEN_PER_X); d = Y_Gl((y+0.5)*LEN_PER_Y); glRectf(a,b,c,d); } void DrawSnake() { Position P; P = Snake->Next; do { DrawUnitBody(P->x, P->y); P = P->Next; }while(!IsLast(P,Snake)); } void DrawFood() { DrawUnitBody(Food.x, Food.y); } void myDisplay(void) { glClear(GL_COLOR_BUFFER_BIT); glPolygonMode(GL_FRONT, GL_LINE); glBegin(GL_POLYGON); glVertex2f(X_Gl(1), Y_Gl(1)); glVertex2f(X_Gl(1), Y_Gl(WIN_Y)); glVertex2f(X_Gl(WIN_X), Y_Gl(WIN_Y)); glVertex2f(X_Gl(WIN_X), Y_Gl(1)); glEnd(); DrawSnake(); DrawFood(); glFlush(); } void myIdle() { SnakeMove(); myDisplay(); // if(!Pressed) Sleep(SPEED); } void NormalKeyboard(unsigned char key, int mouse_x, int mouse_y) { if(key == 'a' && DirctS != RIGHT ) DirctS = LEFT; else if(key == 'd' && DirctS != LEFT) DirctS = RIGHT; else if(key == 'w' && DirctS != DOWN) DirctS = UP; else if(key == 's' && DirctS != UP) DirctS = DOWN; else if(key == 27) exit(0); Pressed = 1; } int main(int argc, char* argv[]) { glutInit(&argc, argv); glutInitDisplayMode(GLUT_RGBA | GLUT_SINGLE); glutInitWindowPosition(200, 0); glutInitWindowSize(WIN_X, WIN_Y); glutCreateWindow("Jecvay Designed!"); InitSnake(); NewFood(); glutDisplayFunc(myDisplay); //画 glutIdleFunc(myIdle); //空闲循环 glutKeyboardFunc(NormalKeyboard); //ascii按键 ESC = 27 glutMainLoop(); return 0; }