A demo of IMP vs OR for moving character on the screen

[TempodiBasic]

Hi guys and gals

Here I post a demonstration to show how to use IMP in the logical managing of the move of a character on the screen and the alternative more known OR.  In the top left corner you can see the result of detector FUNCTION, in the Top Right corner you can see the type of detector FUNCTION at work, in the bottom of the window you can read the help for user, the title of window remembers you that it is a Demo.

Code: QB64: [Select]

1. ' Demo in two languages  / Dimostrazione in due linguaggi
2. Screen 0 'screen text mode / modalit… schermo solo testo
3. _Title "Demo OR and IMP to move a character on screen" ' setting title of window / impostare il titolo della finestra
4. ' defining useful constants  / definire costanti utili
5. Const X = 1, Y = 2, Life = 3, True = -1, False = 0, ModeOr = 10, ModeImp = 20
6. ' defining variables and arrays  / definire variabili ed array
7. Dim Hero(1 To 3) As Integer, Limit(1 To 2, 1 To 2) As Integer, ModeEvaluation As Integer
8.  
9. 'initialization of variables  / inizializzazione delle variabili
10. Hero(X) = (Rnd * 79) + 1
11. Hero(Y) = (Rnd * 22) + 1
12. Hero(Life) = True
13. Limit(1, X) = 10
14. Limit(1, Y) = 2
15. Limit(2, X) = 70
16. Limit(2, Y) = 19
17. ModeEvaluation = ModeImp
18.  
19. ' main loop  /ciclo principale
20. Do
21.     Cls ' refresh screen  / ripulisce lo schermo
22.  
23.     ' manage evaluation mode and its results / gestisce la modalit… di valutazione e i suoi risultati
24.     Locate 1, 1
25.     If ModeEvaluation = ModeImp Then
26.         If outheRange(Limit(1, X), Limit(2, X), Hero(X)) Or outheRange(Limit(1, Y), Limit(2, Y), Hero(Y)) Then Print "Out of game" Else Print " In game"
27.  
28.     ElseIf ModeEvaluation = ModeOr Then
29.         If IntheRange(Limit(1, X), Limit(2, X), Hero(X)) And IntheRange(Limit(1, Y), Limit(2, Y), Hero(Y)) Then Print " In Game" Else Print "Out Of Game"
30.     End If
31.  
32.     ' border of game field  / bordo del campo di gioco
33.     Locate Limit(1, Y), Limit(1, X)
34.     Print String$(Abs(Limit(1, X) - Limit(2, X)), Chr$(178));
35.     For a = Limit(1, Y) To Limit(2, Y) Step 1
36.         Locate a, Limit(1, X): Print Chr$(178)
37.         Locate a, Limit(2, X): Print Chr$(178)
38.     Next
39.     Locate Limit(2, Y), Limit(1, X)
40.     Print String$(Abs(Limit(1, X) - Limit(2, X)), Chr$(178))
41.  
42.     'hero / l'eroe
43.     Locate Hero(Y), Hero(X)
44.     Print "
    ";
45.  
46.     'Helpscreen   / la guida a schermo
47.     Locate 1, 60: Print "ModeEvaluation: ";
48.     If ModeEvaluation = ModeImp Then Print "IMP"; Else Print " OR";
49.     Locate 24, 1: Print " cursors to  move Hero, Enter key to switch ModeEvaluation, Space to quit";
50.  
51.     ' input and command manager     / gestore dell'input e dei comandi
52.     a$ = InKey$
53.     Select Case a$
54.         Case Chr$(0) + "M"
55.             If Hero(X) < 80 Then Hero(X) = Hero(X) + 1
56.         Case Chr$(0) + "H"
57.             If Hero(Y) > 1 Then Hero(Y) = Hero(Y) - 1
58.         Case Chr$(0) + "P"
59.             If Hero(Y) < 25 Then Hero(Y) = Hero(Y) + 1
60.         Case Chr$(0) + "K"
61.             If Hero(X) > 1 Then Hero(X) = Hero(X) - 1
62.         Case "K"
63.             Hero(Life) = False
64.         Case Chr$(32)
65.             End
66.         Case Chr$(13)
67.             If ModeEvaluation = ModeImp Then ModeEvaluation = ModeOr Else ModeEvaluation = ModeImp
68.     End Select
69.     _Limit 20 ' save CPU  / risparmia la CPU
70. Loop
71. End ' Endo of program  /fine del programma
72.  
73. ' SUB and FUNCTION area  / area delle SUB e delle FUNCTION
74. Function outheRange (min As Integer, max As Integer, value As Integer)
75.     outheRange = (min < value Imp value > max)
76. End Function
77.  
78. Function IntheRange (min As Integer, max As Integer, Value As Integer)
79.     If min > Value Or max < Value Then IntheRange = 0 Else IntheRange = -1
80. End Function
81.  

As you can observe, if you run the demo, there is a little difference between detection using IMP and using OR, but for all values inner to  the range, that's no matter, while the difference is visible on the borderline, so each tecnique need an adjustment to be more accurate.

Thanks to read and to try