一个非常奇怪的OpenGL问题，急求，跪拜，匍匐，弯腰，低头，下跪.............

哦，图遮住了，我把画网格的代码再发一遍
glColor3f(1.0f,0.0f,0.0f);
for (loop1=0; loop1<11; loop1++)
{
for (loop2=0; loop2<11; loop2++)
{
if (loop1<10)
{ glBegin(GL_LINES);
glVertex2d(0+(loop1*2),0+(loop2*2));
glVertex2d(2+(loop1*2),0+(loop2*2));
glEnd();
} if (loop2<10)
{
glBegin(GL_LINES);
glVertex2d(0+(loop1*2),0+(loop2*2));
glVertex2d(0+(loop1*2),2+(loop2*2));
glEnd();
}
}
}