title: openGL rotating with Lighting problem
body: <p>I want to draw car in my world.
  but i have problem with lighting when my car rotate ,it seems light position change when car is rotating;
  but when i draw simple cube with glut function it work correctly.</p>
  
  <p>void mydisplay(){</p>
  
  <pre><code>glLoadIdentity()
  glDisable(GL_LIGHT0);
  glColorMaterial ( GL_FRONT_AND_BACK, GL_DIFFUSE) ;
  glColor3f(1.0,1.0,1.0);
  glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
  p2[0]=50.0;
  p2[1]=3.0;
  p2[2]=0.0;
  glLightfv(GL_LIGHT0,GL_POSITION,p2);
  glEnable(GL_LIGHT0);
  gluLookAt(50.0,3.0,0.0,0.0,0.0,0.0,0.0,1.0,0.0);
  glPushMatrix();
  glRotatef(tet,0.0,1.0,0.0);
  glutSolidCube(20);
  glPopMatrix();
  tet+=3.141592653/4;
  glutSwapBuffers();
  </code></pre>
  
  <p>}  </p>
  
  <p>when glutSolidCube(20); change to my drawing code,it work in bad way
  my code:</p>
  
  <p>void Drawing(){</p>
  
  <pre><code>glEnableClientState(GL_VERTEX_ARRAY);
  GLfloat CubeVertex[]={  -20.0,0.0,10.0,//\/\/\/\/\/\\\///\/\/\/\/\/\/\/\/\/\/\/\/\/\/
                  -20.0,0.0,-10.0,
                  -20.0,3.0,-10.0,
                  -20.0,3.0,10.0,    ///BIG   CUBE
              20.0,0.0,10.0,
              20.0,0.0,-10.0,
              20.0,3.0,-10.0,
              20.0,3.0,10.0,////////\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/
              -10.0,3.0,10.0,
              -10.0,3.0,-10.0,
              -10.0,5.0,-10.0,
              -10.0,5.0,10.0,     //SMALL  CUBE
              10.0,3.0,10.0, 
              10.0,3.0,-10.0,
              10.0,5.0,-10.0,
              10.0,5.0,10.0,//\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\//
              -100.0,-2.4,100.0,
              -100.0,-2.4,-100.0,      //FLOOR
              100.0,-2.4,100.0,
              100.0,-2.4,-100.0
              };//\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\\/\//
  GLubyte big_back[]={0,3,2,1};
  GLubyte big_front[]={4,5,6,7};
  GLubyte big_left[]={4,0,3,7};
  GLubyte big_right[]={1,2,6,5};
  GLubyte big_up[]={2,3,7,6};
  GLubyte big_down[]={0,1,5,4};
  GLubyte small_back[]={9,10,11,8};
  GLubyte small_front[]={12,13,14,15};
  GLubyte small_left[]={8,11,15,12};
  GLubyte small_right[]={9,10,14,13};
  GLubyte small_up[]={10,11,15,14};
  GLubyte floor[]={16,17,19,18};
  GLsizei count[]={4,4,4,4,4,4,4,4,4,4,4,4};
  GLvoid* indices[12]={big_back,big_front,big_left,big_right,big_up,big_down,small_back,small_front,small_left,small_right,small_up,floor};
  glVertexPointer(3,GL_FLOAT,0,CubeVertex);
  for(int i=0;i&lt;12;i++){//////////////////glMultiDrawElement////////////////
  if(count[i]&gt;0)
      glDrawElements(GL_QUADS,count[i],GL_UNSIGNED_BYTE,indices[i]);
  }//////////////////////////////glMultiDrawElements//////////////////////
  </code></pre>
  
  <p>}</p>
  
  <p>Thank you.</p>