會轉動的茶壺

鍵盤動作:
void keyboard(unsigned char key,int x,int y)
{
    if(key=='a') angleX+=3;
    if(key=='b') angleX-=3;
    glutPostRedisplay();
}

void keyboard(unsigned char key,int x,int y)
{
printf("%c %d %d\n",key,x,y);
if(key=='a') angleX+=3;
    if(key=='b') angleX-=3;
    glutPostRedisplay();
}

打光程式碼
void myLight()
{
const GLfloat light_position[] = { 2.0f, 5.0f, -5.0f, 0.0f };
glEnable(GL_LIGHT0);
    glEnable(GL_NORMALIZE);
    glEnable(GL_COLOR_MATERIAL);
    glEnable(GL_LIGHTING);
    glLightfv(GL_LIGHT0, GL_POSITION, light_position);
}