Frozen Fish 2: PC/frozenfish_august_1995.bin/bbs/d01xx/d0139.lha/WheelChairSim/MANUAL

Text File | 1988-05-15 | 31KB | 1,088 lines

                  WHEELCHAIR SIMULATOR PACKAGE
                       (Draft 2  4-Feb-88)



                                                   *
             T. Mathews, M. Smith and J. McLaughlin


              Department of Electrical Engineering,
                     University of Calgary,
                Calgary, Alberta, Canada T2N 1N4

                   *
                   Technical Resource Centre,
                 Suite 100, 525 11 Avenue, S.W.,
                Calgary, Alberta, Canada T2R OC9.



                    Contact person: M. Smith.
                    (403) - 220 - 6142 (MDT)



FUNDING:  This  project was initially funded as a special project
by  the   University  of  Calgary and the  Calgary Celebral Palsy
Association.

                   DISTRIBUTION AND COPYRIGHT

   This package  remains  the  copyright property of the authors.
However,  you  are  free  to  copy  and  distribute  the  package
provided  this  notice  remains  with  the  package.  You may not
charge  for any package that includes this program other than for
the  cost  of  the  diskette  to  which  it is copied. AMIGA user
groups  and  the  ubiquitous FRED FISK can copy and distribute it
as per normal.

   If you  find  the  package  useful,  then  in  the  spirit  of
SHAREWARE,  you  are  requested to send a tax deductable donation
(suggested  $20)  to  the  Wheelchair  Simulator  Project, c/o J.
McLaughlin  at  the  Technical  Resource  centre address, so that
another student can be hired to do further development work.

WARNING:  Although  much care and attention has been given to the
development   and  testing  of  the  programs  involved  in  this
package,  no  warranty  is  given  that  the programs will behave
exactly as described.








                        PROGRAM HISTORY:

The   WHEELCHAIR  SIMULATOR    was  suggested  as a project by J.
McLaughlin  to  T.  Mathews  to  fulfill  the  requirements for a
graphics  course taught by M. Smith. The course, ENEL513, is part
of  the program in  COMPUTER ENGINEERING taught at the University
of  Calgary  Electrical  Engineering  Department  (UCEE). Further
development  work  by  T. Mathews and M. Smith occured across the
summer  of 1987 using funds provided by the University of Calgary
and  the  Calgary  Celebral  Palsy Association.  Credit is due to
the  therapists  and patients of the Alberta Children's Hospital,
Calgary   who   made  many  useful  suggestions  and  tested  the
program.

The   MAKER  program  is  based  on  a  project  developed  by S.
Worthington  again  to fulfill a course requirement for ENEL 513.
It  has  been  extensively modified by M. Smith who also designed
the   LYNNETTE  graphical  interface  which allows the program to
run on the AMIGA.



                            FEEDBACK


   Please send your feedback to

     Dr. M. R. Smith,
     Department of Electrical Engineering,
     University of Calgary,
     Calgary, Alberta, Canada T2N 1N4.

     [phone] (MST)

who  is  currently  directing  the  software  development  of the
project  (and  having  a  fun  time  hacking  when  his  new baby
daughter  lets  him onto the terminal. Do you really think that 6
months is TOO early?)

   Please let  him  know  what you think of the program. (I don't
like  the  wall  colours either but something keeps changing them
back  to those colours and I can't find what.) Any suggestions on
different  reinforcers  etc.,  and  information  on bugs would be
useful.

   In reporting  bugs,  please  don't  say  "THIS DOES WORK". Say
instead  if  you do this, and then this, and then that, then this
happens.  That  way,  I  can  trace  what might be happening. For
example,  under  certain conditions (which I can't replicate) all
the  bulletin  boards  and  other  objects move up to the highest
horizontal  wall.  If  this happens, select the DELETE ALL option
and  start  again. If you can make it happen consistently, let me
know how and I'll fix it.


                                M. Smith                      4th








February 1988































































                        PACKAGE CONTENTS


   This package  of  programs is designed to enable therapists to
evaluate  the  types  of  control  for  a  wheelchair used by the
handicapped.  It  is  also  useful in providing some training for
persons  who  need  to  become  more  familiar  with the use of a
wheelchair in a non-threatening and safe environment.

   The package  is  designed  to be run on an Amiga computer with
512K  memory,  a  colour  monitor,  a  joystick, a keyboard and a
mouse.  The  programs  have been written in "C" and can be ported
to  other  computers  that  have  colour graphic capability (e.g.
Apple  G.S.).  Because  of  the size of the program, the need for
graphic  capability  and  other  factors,  it  is  believed  that
porting  to  a  computer  such  as  an  Apple  2E  would  not  be
feasable.

   The package   contains   5   programs,    CONTROLLER,   MAKER,
WHEELCHAIR3D,  WHEELCHAIR2D, ANALYSIS and a series of predesigned
floor plans.

CONTROLLER:
This  is  a  program  designed  to  allow the easy calling of the
other  programs  in  the package. People who become familiar with
the  AMIGA  will  probably  find  that  the direct calling of the
programs  from  the keyboard is a faster process.  It also allows
changing of the date, patient name and other useful utilities.

MAKER:
This  program  enables  the  user  to design a floor plan through
which  the wheelchair operator can move. Walls, doorways, tables,
cones  and  other  objects  can be placed as desired on the floor
plan.  Objects  include  arrows  on  the  walls,  happy faces and
bulletin  boards  with  messages.  Other  objects can be added by
getting  the  authors in a good mood via buttering up their egos.
Various  options  such  as wheelchair speed and rotation rate can
be set for use by the wheelchair simulation programs.


WHEELCHAIR3D:
This  displays,  in  animated  3D,  a  view  of  the  floor plan,
bulletin   boards,  etc.,  as  seen  by  a  person  seated  in  a
wheelchair.  The  wheelchair  can  be  moved  through the plan or
rotated by using the joystick.

WHEELCHAIR2D:
Designed  to  allow  the  user  to become familiar with the floor
plans  generated  by  the  therapist.  It  is more of a game than
anything  else  but does allow some familiarity with the joystick
to  be  obtained.  If  the   game aspect of using the joystick is
important  in  the  therapy,   buy  a  commercial package such as
PACMAN  rather  than  use this program.  There are some very good
(free)  PUBLIC DOMAIN games available on FISH disks. Contact your
local  AMIGA  user's  group  or  computer  shop for details.  The
games  are  free  except  for the cost of the disk onto which you








copy them.

ANALYSIS:  (not yet in existance.)
This  is designed to allow the therapists to analyse the progress
of  the   patient.  Suggestions as to what useful analysis should
be made are requested.


























































                        STARTUP PROCEDURE

   Connect your  AMIGA  computer with monitor, joystick and mouse
as  suggested  in your manual. If you are using a custom joystick
be  careful  when  connecting  to  an AMIGA 1000 computer as they
have  a  live  (5  Volt) pin on the joystick connector. Make sure
that  your  joystick  has  this pin disconnected. We have not yet
found  a  joystick that causes a problem, but everybody has heard
of  Murphy.

   For the  AMIGA  1000 computer, insert the  KICKSTART disk into
the  disk  drive and switch on the computer and monitor. With the
AMIGA  500  and  2000 computer you simply switch on the computer:
no KICKSTART disk is necessary.

When  requested  by  a prompt on the screen, remove the KICKSTART
disk  and  insert  the  WHEELCHAIR  SIMULATOR  disk into the disk
drive.  In  a short period of time, the  CONTROLLER  program will
load into memory and run itself.

   Using the  BACKUP  command  of  the  controller  program,  you
should  first  make  copies  of the wheelchair simulator disk and
then  put  away  one  of  the  disks   in a safe location as your
master  disk.   It  is  suggested  that  one  disk  be  used  per
patient.

   Once backup  copies  of  the  disks have been made, choose the
options to run the  MAKER or SIMULATOR programs as required.




































                           CONTROLLER


   The commands  for  running  this  program  will  appear on the
screen.   Type  the  first  letter  of  the command and press the
RETURN   key.  The  command  will  become  highlighted.  Entering
another  letter  and  pressing  RETURN  will enable you to change
your  choice.  Once  the correct command has been selected, press
return key again and the command will be executed.


   The available commands are

A  -  ANALYSIS  provides an analysis and print out of the results
of  the patient sessions using the simulators. (Not available Feb
1988.)

B  -  BACKUP  which  causes a copy of the master disk to be made.
It  is  suggested  you  make a new disk for each patient and keep
your master disk in a safe location.

C  -  CHANGE which enables you to change the floor plan or change
the  options for the simulation of an existing plan.  You will be
provided  with  a  list of the names of the floor plans.  Type in
the  name  of  the  plan  you wish to change and press the return
key.

D  -  DELETE  which  enables you to delete an unwanted floor plan
from  the disk.  You will be provided with a list of the names of
the  floor  plans.   Type  in  the  name  of the plan you wish to
delete  and press the return key.  To avoid accidental removal of
the  plans  by  the  patient, a password is required to cause the
deletion. The password is Get on with it

L  -  LIST  provides  a  list of the available floor plans on the
current disk.

M  -  MAKE  will allow the making of  a new floor plan.  You will
be  provided  with a list of the names of the floor plans already
existing  so  you  can choose another no conflicting name.  Press
RETURN when you are ready.

P  -  PATIENT  allows  the  changing  of the patients name on the
disk.  The  patient  name  is  used  as a file name into which to
store the analysis results from the simulator.

R  -  REMOVE  removes  the  existing  floor  plans from the disk.
Useful  command  if  you  can't  find  the master disk when a new
patient  comes  in.  Copy  another patient's disk and then remove
the  plans  from  it.  To  avoid  accidental removal, a series of
passwords  are  required to cause the deletion. The passwords are
Get on with it and or else!!!!

T  -  TIME  and  DATE  allows the setting of the current time and
date  of  the  session  for use by the analysis program. Once the
time  and  date  are  set,  they are automatically changed by the








computer until it is powered down.

2  -  2D  simulation  A  list  of  the  names  of the floor plans
available  is  first  provided.  Type in the name of the plan you
wish to run and press return.

3  -  3D  simulation  A  list  of  the  names  of the floor plans
available  is  first  provided.  Type in the name of the plan you
wish to run and press return.























































                              MAKER




   This program   is   a   graphics   program   to  allow  simple
interactive  entry  of a floor plan.  Rather than entering random
floor  plans,  it  is  suggested that the therapist build a floor
plan  of  a  situation  with  which the patient is familiar (e.g.
hospital ward, home, school).

                           DESCRIPTION


   If you  are  developing  a  new  floor plan using the M - MAKE
option  of  the  controller  program, you will be provided with a
small  box called a REQUESTER. This is to be used to enter in the
name  of  the plan. There should be a small greyish box (the text
cursor)  inside  the  requester.  If  there is not, then move the
mouse  so that the arrow on the screen points into the black area
of  the  requester  and press the (left) button on the mouse. The
text  cursor   should  appear.  (The  text  cursor will be in the
wrong  place  when  a   requester  appears  on the screen, if the
mouse  buttons get touched shortly before the requester is due to
appear.  This  fact should be remembered as it is a fairly common
thing  to  cause  happen in other parts of the controller program
as  you  become  familiar with the program and become quicker off
the mark.)


   Enter in  the  name  of the new plan and press the return key.
If  you  have deliberately chosen the name of an existing plan, a
requester  will  appear  at  the  top  of  the  screen to ask for
confirmation.  Use the mouse to move the arrow to point to either
the  OKAY  TO  DELETE or the CHOOSE NEW NAME option and press the
left mouse button for the program to continue.


   If you  used  the  CHANGE  option from the CONTROLLER program,
then  the  old  floor  plan will automatically be read in so that
you can modify it.























         Using the MAKER program to create floor plans.


   A grid  of  grey lines will appear on the screen. This will be
the  WORKING AREA where the floor plan is designed.

   At the  right  of  the  screen, is a series of coloured boxes.
These  performed  a  function  in  the original program and since
they  looked  pretty,  I  left  them  in.  In  version  2 of this
program,  these  will be used for selecting objects (happy faces,
etc.) in an easier way than currently done.

   On the  left  of the screen, a series of commands appear ( the
MENU  ).  Move  the red CROSS on the screen to one of the options
by  moving the mouse and press a mouse button. The command chosen
should  become  highlighted  in   WHITE.  If you choose the wrong
menu  item,  move the cross to another option and press the mouse
key  twice:  the  first to unchoose the unwanted item, (highlight
disappears), and the second time to choose the correct item.

   The MENU options are

QUIT  used  for  leaving  the  maker program and returning to the
controller program.

WRITE  PLAN  used  to  save  the  plan you have designed onto the
patient disk.

SHOW  TRUE  To  make  it  easier  to  use  the program, it is not
necessary  to  place  items  such  as  happy  faces  and bulletin
boards   EXACTLY  at  the  right  location  on a wall. You simply
place  it  close  to  a wall. When the plan is saved, the program
works  out  the nearest wall and moves the object to there. Since
the  program  makes some decisions, the objects don't always move
where  you  want  them.  Using the SHOW TRUE option allows you to
find  out  what  the  computer  will  do.  If you don't like what
happens,  use  the  CHANGE  command  to move an item to somewhere
else.

CHANGE  This option allows you to delete incorrect items added to
the  floor  plan,  change  the  messages  printed on the bulletin
board,  change  the operating options of the simulation. For more
details   on   the  CHANGE  command  see  the  section  entitleed
"Building a floor plan".

START   Allows   the  initial  placement  and  direction  of  the
wheelchair to be set in the floor plan.

BULLETIN  Allows  the  placement of bulletin boards and messages.
Details later.

OBJECTS  Allows  the  placement  of  tables, cones, arrows, happy
faces. Details later.

DOORWAYS  Allows  the  placement  of  doorways  in walls. Details
later.









WALLS  Allows the placement of walls in the floor plan. The walls
are the fundamental unit of the plan. Details later.





























































                      BUILDING A FLOOR PLAN


   First select  the  WALL  option.  That  option  should  become
HIGHLIGHTED.  Now  move the cross-hair using the mouse. Place the
cross-hair  close  to one of the intersections of the GRID in the
WORKING  SPACE  and  press  the  (LEFT)  mouse  button  ONCE  and
RELEASE.  You  don't  have  to  get  very  fussy of "how close is
close"  as  the  computer  will  choose  the nearest intersection
automatically.


   Now move   the  mouse  in  either  a  horizontal  or  vertical
direction.  A thin RED line will appear on the screen and move as
you  move  the  mouse. This is the wall that will later be drawn.
Move  the  mouse  UP,  DOWN,  LEFT and RIGHT until the wall suits
your  fancy.  Then  press  the  mouse  button.  The RED line will
disappear  and a YELLOW line will appear. This line does not move
with the mouse and shows the final placement of the wall.

   DELETING   a  wall  that  is in the wrong place can be done by
the following stages
   Select the CHANGE option. A new MENU will appear.
   Select   the  DELETE  LAST  item  option  and  the  wall  will
   disapper.
   Select the FINISHED option and the main menu will reappear.

Now  add  any  more  walls  that  you  want. You can choose other
options and then come back to add even further walls.



   Adding  DOORWAYS   to  existing  walls  is  easy.  Choose  the
DOORWAY  option  from the menu.  Choose the middle of an existing
wall  with  the  cross-hair  and press the mouse button.  The red
line  will  again  appear  and move with the mouse movement. This
shows  the  location of the doorway. Make the doorway as large as
you  require  and  press  the  mouse  button. A  PURPLE line will
appear  in  the  wall.  This  represents  the  doorway.  For best
effects  in  the 3D simulation, always place doorways into walls.
You  can  get  some interesting features if the doorway is in the
middle  of  no-where.  Add all the doorways you want. They can be
removed  by using the change command in the same way as described
for the walls.


   Adding OBJECTS  to  the  floor  plan  can  be  down  by  first
selecting  the   OBJECT  menu  option. Now move the cross-hair to
the  desired  location  on  the  working area and press the mouse
button.  A  small white dot will appear on the screen marking the
location  chosen.  At  the  bottom of the screen a requester will
appear.  You  can  type  in  the name of object you want and then
press  the  return  key.  The  object  will  then  appear  on the
screen.  The objects available are:

   ^  V  <  > which represent  UP, DOWN, LEFT, RIGHT ARROWS. Note








   that  UP  is a term relative to the screen at the moment. When
   the  simulation  works,  an  UP arrow means an arrow that will
   point  north  (towards  the  top  of  the  screen. Interesting
   visual  effects can be acheived by putting an UP arrow near an
   EAST-WEST  wall to provide additional reinforcement. Note that
   these  objects should be placed CLOSE but not ON a wall if you
   want  them  to  remain on the expected side of a wall when the
   floor plan is saved to a disk.

   T  C  represent  TABLES  and  CHAIRS  that  can  be  placed as
   obstacles  or  as  objects  towards  which  the patient can be
   directed.  These  remain where you put them and do not move to
   the nearest when the plan is saved.

   H  represents HAPPY FACES. Happy Faces appear on the wall WHEN
   the  wheelchair  gets  close  to them and is facing them. They
   appear  as  blank black areas on the wall until the wheelchair
   comes  close.   (KNOWN  BUG:   Unpredicatable things happen if
   two  happy faces are on the same wall. Happy Faces only appear
   in  a  very short range of wheelchair positons relative to the
   wall.)

A  useful  reinforcer  is the  BULLETIN board. You are allowed up
to  8  bulletin  boards  per  floor  plan.  This  is an artifical
constraint  and  could  be changed. You enter a bulletin board by
selecting  the  bulletin  menu option. Now move the cross-hair to
the  desired location and press the button. A small dot marks the
location.   A  requester will appear at the bottom of the screen.
Type  in  the  desired message (maximum 25 letters aprroximately)
and  press  the  return  key. The location of the bulletin boards
are  indicated  by  the  symbols B1  through  B8. The messages in
the  bulletin boards can be changed by selecting the CHANGE  menu
option  and  then  the  bulletin  sub-option in the new menu that
appears.  During  the simulation, the message only appears on the
bulletin  boards when the wheelchair is close and in front of the
bulletin board.. At other times, they appear as blank areas.


   The starting  location of the wheelchair can be chosen via the
START  menu  option. Select the starting location required in the
floor  plan  and  press the mouse button. A requester will appear
asking  for  the starting direction  to be indicated. The options
are  L  R  U  D which correspond to LEFT, RIGHT, UP and DOWN. The
start  position  can  be changed by deleting the old position via
the  CHANGE  command  and  selecting  a new position. If no start
position  is  chosen,  then the program automatically selects the
centre  of  the  floor plan facing North (up). If this happens to
be a wall then so be it.


   The  CHANGE  menu  option  allows  the  deletion  of  unwanted
items,  changing  of simulation options, bulletin board messages.
Selecting  this  item  causes  a  new  menu  to  appear  with the
following choices.

   FINISHED  leaves  the  CHANGE  option  and returns to the main








   menu.

   DELETE  LAST  ITEM  will  remove  the  last  item drawn on the
   screen.

   DELETE  ITEM  allows  the deletion of a specific item or group
   of  items.  Once selected, move the cross-hair to a location a
   little  to  the left and below the object to be deleted: press
   the  mouse  button.  Now  move  the cross-hair to a location a
   little  to  the  right and above the object to be deleted.  As
   you  move  the  mouse,  a  small grey rectangle appears on the
   screen.   When  you  press  the  mouse  button, all items that
   start or end in the box will be deleted (never to return).
   WARNING:    If  you  try  to  delete  a  wall that is touching
   another  wall,  it  is  difficult not to delete both walls. If
   you  do  accidently  delete  an unwanted wall or two, then put
   them back using the WALL command.

   DELETE  ALL allows the deletion of everything in the plan. The
   name  of the plan remains.  If you want to completely delete a
   plan,  then the DELETE option in the CONTROLLER program allows
   you to do this.

   BULLETIN  allows  the changing of the messages in the bulletin
   board.  On  selection  of  this item, a requester will appear.
   Type  in the bulletin board number you want to change. Another
   requester  will  appear showing the old message.  You can edit
   the  message  by  using  the  arrow  keys  to the right of the
   keyboard,  the  backspace  key  and  the normal keyboard keys.
   Press  the return key when you have an acceptable message. The
   arrow  keys  at  the  side of the keyboard allow you to before
   some  editting  on the old message rather than simply deleting
   it using the back space key.

   OPTIONS  allows  the  changing  of  the  options  used  by the
   simulator when it runs.  The options are

      f F S                   (default S)     name FLASH
      turn  the  FLASH  off/on  or  replace  it  by  a  STOP sign
      respectively.  The  flash  is  used  to  indicate  when the
      wheelchair   runs   into   something.  The  lack  of   some
      indication  that  the  wheelchair has run into something is
      confusing.    However,   the  flash  can  be  an  undesired
      reinforced.

      F0 F1 through F8        (default F0)    name FONTS
      allowing  the  size  of  the  letters  used on the bulletin
      board  to  be  changed.  (Only  font  0  is present on this
      issue)

      J1 J2 through J5        (default J1)    name JOYSTICK
      controls  the  momentum  of  the  wheelchair.  Without this
      control,   the  wheelchair  does  not  stop  instantly  you
      release   the  joystick.  Larger  numbers  means  that  the
      joystick  must  be  held for a longer period of time before
      any  action  occurs.  (At  time  of  writing,  this was not








      behaving in the manner expected.)

      l L                     (default L)     name LINES
      places  LINES  off/on the floor of the simulator. This is a
      very useful visual clue in the 3D simulation.

      P1 P2 through P5        (default P1)    name PADS
      places  a  set  of WHEELCHAIR FOOT PADS on the front of the
      screen  to allow visual positioning of the wheelchair. Only
      P1  means anything as we can't decide on useful shapes (arm
      rests or what have you.)

      R1 R2 through R100      (default R11)   name ROTATION
      controls  the  rate  of  rotation  of the wheelchair.  This
      should  be  about 7/10 of the value of the SPEED option for
      reasonable looking 3D simulations.

      S1 S2 through S100      (default S16)   name SPEED
      controls  the  speed  of  forward  motion of the wheelchair
      during each frame of the animation.

      T1 T2 through T100      (default T8)    name TIME
      controls  the  time  interval  (in  1/10 secs) at which the
      screen  updates.   It  controls  the  animation rate of the
      screen.  Making  the  SPEED  and TIME options both smaller,
      means  that  the  movement  through  the floor plan will be
      smoother.  However,  if  the floor plan is complicated with
      many  walls  and objects, the time for each animation frame
      may change, which is confusing for the patient.

      Z0 Z1 through Z4        (default Z2)    name ZOOM
      controls  the zoom factor used to display the floor plan in
      the  2D  simulation.  Value Z0 is only useful for providing
      the  patient  with  an  indication  of  what the floor plan
      looks like.

NOTE:  If  this  program  is  run directly from the AMIGA command
line rather than from the CONTROLLER program then the syntax is

        maker  planname

change an old floor plan or

        maker

to make a new floor plan.


















                 3D SIMULATION and 2D SIMULATION


   These run  automatically  from  the  controller program.  When
the  3D  version  is run, a blue screen will appear. Pressing the
joystick   will   cause   the   simulation   to  start.  Joystick
forward/back  movement  will  cause the scene to move relative to
the  wheelchair.   Left  and  right  joystick movements cause the
chair  to  rotate.  These actions follow what is to expected if a
real  wheelchair  was  moving.  In  the  2D version, the joystick
movement  causes the wheelchair to move on the screen in the same
way that the joystick moves and not a real life movement.


   To exit  the  simulators, hold down on the joystick button for
a  count  of  about   5  - 8 seconds and then release the button.
Pull  back  on  the  joystick.  This  removes  the chances of the
patient  accidently  hitting  the  button and causing an unwanted
stop.

KNOWN  BUG:  The  simulators can be stopped by hitting CTRL-C but
this  will  not  allow  the  simulators to be run again until the
computer  has  been powered down.  This might be fixed in a later
release.



NOTE:  If  this  program  is  run directly from the AMIGA command
line rather than from the CONTROLLER program then the syntax is

   wheelchair2d planname

or

   wheelchair3d planname





























                 ANALYSER (Does not yet exist.)

   This is   a  program  that  analyses  data  collected  by  the
simulation  programs   during  a  session  with  the  patient.  A
session  refers  to  the  time  spend  on  one  floor plan at one
sitting.  The  data  collected  includes floor plan name, session
date,  session  duration,  whether 2D or 3D simulator used, types
and  numbers  of obstacles encounterd. Indications of the quality
of  joystick  use  are  given by the number of times the joystick
was   released   or  the  patient  bumped  into  walls  or  other
obstacles.  The settings of the speed, rotation and other options
are recorder.

   The commands  for  tunning  this program appear on the screen.
Type  the  first  letter of the command and press the return key.
The  command  will  become  highlighted. Once the correct command
haaaas  been  chosen, press the  return key again and the command
will be executed.

   the available commands are

   A - ANALYSE graphs? information from several sessions.

   L - LIST provides a list of sessions according to date.

   P  - PRINT provides a hardcopy printout of one of the sessions
   if a printer is connected to the computer.

   S - SCREEN sends the data printout to the screen.


   The format of the printout is as follows

   1. Name of the patient.
   2. Date of the session.
   3. Duration of the session.
   4. Floor plan name and whether 2D or 3D.
   5. List and number of obstacles used.
   6. Total number of obstacles.
   7. Number of times patient bumped into walls.
   8.  Number  of  times  patient  bumped  into  tables  or other
   obstacles.
   9.  Number  of  times joystick was released (i.e. to determine
   the quality of joystick use.)
   10.  Directions  patient  travelled  (i.e. the number of times
   patient moved forward, reverse, left and right)
   11.  Settings  of  the  options  used  in the simulation (i.e.
   reinforcers, speed, rotation rates etc.