1. for(int i=0;i<pointsInSpace.size();++i){
  2. //draw rectnagle at (x,y,z)
  3. }
  4.  
  5. (-1, -1, 0)
  6. (-1, 1, 0)
  7. ( 1, -1, 0)
  8. ( 1, 1, 0)
  9.  
  10. up_dot_n_dot_n.X up_dot_n_dot_n.Y up_dot_n_dot_n.Z 0
  11. n.X n.y n.z 0
  12. up_dot_n.x up_dot_n.x up_dot_n.z 0
  13. p.x p.y p.z 1