void earth();
int APIENTRY _tWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPTSTR lpCmdLine, int nCmdShow) {
UNREFERENCED_PARAMETER(hPrevInstance); UNREFERENCED_PARAMETER(lpCmdLine); char *argv[] = {\, \};
int argc = 2; // must/should match the number of strings in argv glutInit(&argc, argv); //初始化GLUT库； glutInitWindowSize(700,700); //设置显示窗口大小
glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB); //设置显示模式；（注意双缓冲） glutCreateWindow(\); // 创建显示窗口 glutDisplayFunc(Display); //注册显示回调函数 glutReshapeFunc(Reshape); //注册窗口改变回调函数 myinit();
glutTimerFunc(200, mytime, 10); glutMainLoop(); //进入事件处理循环 return 0; }
void myinit() { }
void Display(void) {
glClear(GL_COLOR_BUFFER_BIT);
glMatrixMode(GL_MODELVIEW); //设置矩阵模式为模型变换模式，表示在世界坐标系下 glLoadIdentity(); //将当前矩阵设置为单位矩阵
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); glEnable(GL_BLEND); glEnable(GL_POINT_SMOOTH);
glHint(GL_POINT_SMOOTH_HINT, GL_NICEST); glEnable(GL_LINE_SMOOTH);
glHint(GL_LINE_SMOOTH_HINT, GL_NICEST); glEnable(GL_POLYGON_SMOOTH);
glHint(GL_POLYGON_SMOOTH_HINT, GL_NICEST); glPointSize(10); glLineWidth(8);
sun(); earth();
glutSwapBuffers(); //双缓冲的刷新模式； }
void sun() {
glPushMatrix(); glPushMatrix();
glColor3f(1,0,0); glutWireSphere(rs,40,40); glRotatef(as,0,0,1);
glPopMatrix(); glColor3f(1,1,0); }
void earth() {
glColor3f(1,1,0); glBegin(GL_POINTS); glVertex2f(xs+rs,ys); glEnd(); glPopMatrix(); glPushMatrix(); glPushMatrix(); glColor3f(0,0,1); glutWireSphere(re,40,40); glPopMatrix(); glTranslatef(xe,ye,0); glRotatef(ae,0,0,1); glTranslatef(-xe,-ye,0); glPushMatrix(); glRotatef(aes,0,0,1); glBegin(GL_POINTS); glVertex2f(xs+rs,ys); glEnd();
glPopMatrix();
}
glPopMatrix();
void mytime(int value) {
glutPostRedisplay(); //重画，相当于重新调用Display(),改编后的变量得以传给绘制函数
glutTimerFunc(200, mytime, 10); }
void Reshape(GLsizei w,GLsizei h) {
glMatrixMode(GL_PROJECTION); //投影矩阵模式 glLoadIdentity(); //矩阵堆栈清空 glViewport(0,0,w,h); //设置视区大小
gluOrtho2D(-xm-rm-10,xm+rm+10,-xm-rm-10,xm+rm+10); //设置裁剪窗口大小 glMatrixMode(GL_MODELVIEW); //模型矩阵模式 }
as+=1; ae+=1; aes+=1;