opengl旋转问题

先画一个矩形，然后旋转，用glRotatef是不是绕着矩形左下角旋转？如果要绕着右下角
旋转，要怎么办啊？
        glLoadIdentity(); 
glTranslatef(-10.0,-10.0,0.0); 
glRotatef(-angle,0.0,0.0,1.0);
glColor3f(1.0,0.0,0.0); 
glRectf(0,0,10,5);