[Emacs-diffs] Changes to emacs/lisp/play/blackbox.el

[Juanma Barranquero]

Index: emacs/lisp/play/blackbox.el
diff -c emacs/lisp/play/blackbox.el:1.13 emacs/lisp/play/blackbox.el:1.14
*** emacs/lisp/play/blackbox.el:1.13    Fri Sep 20 14:33:35 2002
--- emacs/lisp/play/blackbox.el Tue Feb  4 08:20:41 2003
***************
*** 34,54 ****
  ;; pass thru the box undisturbed, 2) it will hit a ball and be absorbed,
  ;; 3) it will be deflected and exit the box, or 4) be deflected immediately,
  ;; not even being allowed entry into the box.
! ;; 
  ;; The strange part is the method of deflection.  It seems that rays will
  ;; not pass next to a ball, and change direction at right angles to avoid it.
! ;; 
! ;;                         R   3   
! ;;             1 - - - - - - - - 1 
! ;;               - - - - - - - -   
! ;;               - O - - - - - - 3 
! ;;             2 - - - - O - O -   
! ;;             4 - - - - - - - - 
! ;;             5 - - - - - - - - 5 
! ;;               - - - - - - - - R 
! ;;             H - - - - - - - O   
! ;;               2   H 4       H   
! ;; 
  ;; Rays which enter and exit are numbered.  You can see that rays 1 & 5 pass
  ;; thru the box undisturbed. Ray 2 is deflected by the northwesternmost
  ;; ball.  Likewise rays 3 and 4. Rays which hit balls and are absorbed are
--- 34,54 ----
  ;; pass thru the box undisturbed, 2) it will hit a ball and be absorbed,
  ;; 3) it will be deflected and exit the box, or 4) be deflected immediately,
  ;; not even being allowed entry into the box.
! ;;
  ;; The strange part is the method of deflection.  It seems that rays will
  ;; not pass next to a ball, and change direction at right angles to avoid it.
! ;;
! ;;                         R   3
! ;;             1 - - - - - - - - 1
! ;;               - - - - - - - -
! ;;               - O - - - - - - 3
! ;;             2 - - - - O - O -
! ;;             4 - - - - - - - -
! ;;             5 - - - - - - - - 5
! ;;               - - - - - - - - R
! ;;             H - - - - - - - O
! ;;               2   H 4       H
! ;;
  ;; Rays which enter and exit are numbered.  You can see that rays 1 & 5 pass
  ;; thru the box undisturbed. Ray 2 is deflected by the northwesternmost
  ;; ball.  Likewise rays 3 and 4. Rays which hit balls and are absorbed are
***************
*** 194,214 ****
  Note carefully the relative positions of the ball and the ninety
  degree deflection it causes.
  
!     1                                            
!   - * - - - - - -         - - - - - - - -         - - - - - - - -       
!   - * - - - - - -         - - - - - - - -         - - - - - - - -       
! 1 * * - - - - - -         - - - - - - - -         - O - - - - O -       
    - - O - - - - -         - - O - - - - -         - - * * * * - -
    - - - - - - - -         - - - * * * * * 2     3 * * * - - * - -
!   - - - - - - - -         - - - * - - - -         - - - O - * - -      
!   - - - - - - - -         - - - * - - - -         - - - - * * - -       
!   - - - - - - - -         - - - * - - - -         - - - - * - O -       
                                  2                         3
  
  As mentioned above, a reflection occurs when a ray emerges from the same point
  it was sent in.  This can happen in several ways:
  
!                                                                            
    - - - - - - - -         - - - - - - - -          - - - - - - - -
    - - - - O - - -         - - O - O - - -          - - - - - - - -
  R * * * * - - - -         - - - * - - - -          O - - - - - - -
--- 194,214 ----
  Note carefully the relative positions of the ball and the ninety
  degree deflection it causes.
  
!     1
!   - * - - - - - -         - - - - - - - -         - - - - - - - -
!   - * - - - - - -         - - - - - - - -         - - - - - - - -
! 1 * * - - - - - -         - - - - - - - -         - O - - - - O -
    - - O - - - - -         - - O - - - - -         - - * * * * - -
    - - - - - - - -         - - - * * * * * 2     3 * * * - - * - -
!   - - - - - - - -         - - - * - - - -         - - - O - * - -
!   - - - - - - - -         - - - * - - - -         - - - - * * - -
!   - - - - - - - -         - - - * - - - -         - - - - * - O -
                                  2                         3
  
  As mentioned above, a reflection occurs when a ray emerges from the same point
  it was sent in.  This can happen in several ways:
  
! 
    - - - - - - - -         - - - - - - - -          - - - - - - - -
    - - - - O - - -         - - O - O - - -          - - - - - - - -
  R * * * * - - - -         - - - * - - - -          O - - - - - - -
***************
*** 426,432 ****
      (delete-char (length c))
      (insert c)
      (backward-char 1)))
!   
  (provide 'blackbox)
  
  ;;; blackbox.el ends here
--- 426,432 ----
      (delete-char (length c))
      (insert c)
      (backward-char 1)))
! 
  (provide 'blackbox)
  
  ;;; blackbox.el ends here