为啥光源不移动
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glLoadIdentity() ;
float lightpositon[] = {-10.0f, 0.0f, 0.0f, 0.0f};
gluLookAt(0,0,10,0,0,0,0,1,0);
glPushMatrix();
glTranslatef(angle,0,0);
glLightfv(GL_LIGHT0, GL_POSITION, lightpositon);
glTranslatef(angle,0,0);
glPopMatrix();
auxSolidSphere(1.5);
angle ++ ;
return TRUE;