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MIRRORS.BAS
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BASIC Source File
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1991-02-11
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2KB
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64 lines
' +----------------------------------------------------------------------+
' | |
' | GRAFWIZ Copyright (c) 1990 Thomas G. Hanlin III |
' | |
' | The Graphics Wizard's Library for BASIC |
' | |
' +----------------------------------------------------------------------+
REM $INCLUDE: 'grafwiz.bi'
CONST MaxX = 639
CONST MaxY = 479
CONST MaxColor = 15
DEFINT A-Z
RANDOMIZE TIMER
GetDisplay Adapter, Mono
IF Adapter < 6 THEN
PRINT "Sorry, but you must have a VGA display active to run this demo."
END
END IF
X = INT(RND * MaxX \ 2)
Y = INT(RND * MaxY \ 2)
C = INT(RND * (MaxColor - 1) + 1)
G12Mode 1
G12Color C, 0
DO
ky$ = INKEY$
IF LEN(ky$) THEN
SELECT CASE UCASE$(ky$)
CASE "C": G12Cls
CASE "P": WHILE INKEY$ = "": WEND
CASE ELSE
END SELECT
ELSE
G12Plot X, Y
G12Plot MaxX - X, Y
G12Plot MaxX - X, MaxY - Y
G12Plot X, MaxY - Y
SELECT CASE INT(RND * 3)
CASE 0: X = X - 1: IF X < 0 THEN X = MaxX \ 2
CASE 1: X = X + 1: IF X > MaxX \ 2 THEN X = 0
CASE ELSE
END SELECT
SELECT CASE INT(RND * 3)
CASE 0: Y = Y - 1: IF Y < 0 THEN Y = MaxY \ 2
CASE 1: Y = Y + 1: IF Y > MaxY \ 2 THEN Y = 0
CASE ELSE
END SELECT
IF INT(RND * 20) = 1 THEN
C = INT(RND * (MaxColor - 1) + 1)
G12Color C, 0
END IF
END IF
LOOP UNTIL ky$ = CHR$(27)
G12Mode 0