 
                              K E Y S

   Mouse is not required. Only keyboard is used. If Vessel does not 
   respond to keyboard, click on Vessel's screen to return focus.

   Ct Y   means combination of two keys "Ctrl + Y"
          Ctrl is a left bottom key on keyboard.
          Hold it when pressing Y. Hold shortly for single action.
          For movements, hold can be continuous.

   R e a d i n g   T e x t s  (like this):
  
     Ct ]   Scroll Down   (Mnemonics > ])
     Ct [   Scroll Up     (Mnemonics < [)
     Ct =   Page Down     (Mnemonics Ct +)
     Ct -   Page Up
     Esc    Turn text off

   S  c  r  o  l  l     t  h  i  s     t  e  x  t     for more help ...

   
   H e l p:    
 
     Ct H    Help.  Display this text and Quick Help.
     Ct Q    Quick Help
     Ct I    Introduction.
     Ct A    About
     Ct 1    Level 1 Help 
     s:2.0   To read Sketch 0 of Level 2, type "s:2.0" and press Enter.
             s:2.1, s:3.0, ... may be available.

   S t o r i e s
    
    This command(s) must be typed:
    t:story



   D r i v e r   M o t i o n s:                                               
     Ct + ->       Turn Head Rigth           
     Ct + <-       Turn Head Left            

 
  
   V e s s e l   M o t i o n s:
  
     Arrow Up      Move Forward              
     Arrow Down    Move Backward             
     Arrow Right   Turn Clockwise
     Arrow Left    Turn CounterClockwise    
     PageUp        Elevate                   
     PageDown      Downlevate 
     Ct .          Turn clockwise 90^          (Mnemonics Ct >)
     Ct ,          Turn counterclockwise 90^   (Mnemonics Ct <)
     Ct F          Faster Speed
                   This increases movement step.
     Ct S          Slower Speed. Decreases movement step.
     Ct C          Cruder azi control.
                   This increases azi step.
     Ct N          Nicer  azi control. Decrease azi step.




   V e s s e l   and    D r i v e r    M o t i o n s

     Ct P   Autopilot toggle
            By default, Driver and Vessel are synchronized: they both
            turn together. To unbound Driver from Vessel, set
            Vessel to Autopilot mode.
            When in this mode, turning Vessel does not turn Driver.
     Ct O   (Letter "O", not digit zero.)
            Resynch Vessel to Driver (Observer).
            Turns Vessel to Drivers's direction.
            This is convenient when Driver looked at some object
            and then decided to turn Vessel precisely to this object.
     Ct B   Turns Driver (Back) to Vessel to synchronize them.
       
   

 
   S e l e c t    H i l l    or     S t a r.

      Ct M   Select Hill or Star for Measurement:

               Cancels all measurements and selection 
                   or
               Unselects currently measured hill/star, removes focus 
               from it, and selects next object to measure its 
               parameters.


             Azi to object is measured for any level of travelers.
             More advanced parameters are measured or calculated for 
             higher levels.
             Measurements displayed on Angleminer screen.
             If star is in visibility cone, it is visible on main
             screen and its name is displayed next to it.
             If star is not visible, it is still measured, but there
             is no way to indicate it on the screen.
             Measured object is continued to be measured when 
             Vessel moves.

      Ct V   Turns Vessel to selected object.
             If Vessel is not autopiloted, Driver turns with Vessel.

      Ct D   Turns Driver (head) to selected object.
             If Vessel is not in Autopilot mode, then Vessel turns 
             together with Driver. This is one time action: when
             begin moving after the turn, direction to the Star
             is not automatically preserved.
             
      Ct L   Does Ct M and then Ct D
      Ct T   Turns Vessel to the Hill (if Hill is in the scene scope) 
             and moves Vessel right on top of the Hill. If collision, 
             Vessel is elevated.


                                              

   G e n e r a l    C o n t r o l:  
 
     Ct 0  (Digit "0") Get me back to normal ... 
           This restores some parameters to 
           defaults. Can be helpful when experimenting with controls, 
           Driver fell into postion which is confusing.

     R     Restart the travel ... From the beginning.
           Are you sure to do this? All accomulated path data will be 
           lost. You will reenter Ightaria at the same postion as 
           first time.
           However, your level will not be lost.

     X     Exit           
           In Microsoft Windows, combination 
           Alt+Space C   can be added to close program which contains
                         Applet.
                  



   D i a l o g

     Type text without holding Ctrl:
       a:text    text is a text of answer

     Backspace   Erase   


   L e v e l   S p e c i f i c   H e l p   i n   D i a l o g   

     s:2.0    For Level 2
     s:2.1
     s:2.3

     s:3.0    For Level 3

 

   M i s c e l l a n e o u s:

      Ct E   Display Axes                       

            
            
   E n g i n e   C o n t r o l            

     This commands must be typed.
      
     e:triangles  Toggles between triangles and squares when
                  displaying images on screen.
 
     e:derivatoraccuracy*10  
     e:derivatoraccuracy/10 Increases/decrease in 10 times trust to 
                            Derivator's accuracy. Derivator is partially 
                            magic device, so you need to treat it with a 
                            grain of suspicion.
     e:log         Display System Log



   M o r e   d e t a i l s:

    Ct 0 (Ct + digit zero) Fixes confusing settings to defaults.
         Precisely, does the folowing:

         autoPilot      = false;
         engAltitude    = false;

         elevationStep  = 10.;
         stepXY         = defaultStep;  //Horizontal Speed
         AngleStep      = AngleStepDefault;
         dAltiIncr      = 0.;
   
         flagUpdatePosAScene = true;

         derivatorTrustedGeneralAccuracy = 1.e-12;
         sphereNavigationTrustedGeneralAccuracy = 1.e-14;




