Paging.bas by Bob Seguin
![[Image: Screenshot-631.png]](https://i.ibb.co/tmfp2DM/Screenshot-631.png)
Description: A SCREEN 9 paging demo with a space ship flying through a meteor shower. The Surprise? See the second code example, Joker.bas, which uses this example, mixed with TheBOB's White Cake Recipe program.
... And the surprise, Joker.bas
Description: Whenever we had a graphics emergency at The QBasic Forum, we always put up the Bat Signal ^^0^^ to call on TheBOB (aka The Batman) for help. One of Bob's creations, a recipe for White cake, and his Page Flipping Screen 9 demo were combined in the following code, but something went amiss that day in Gotham City...
Description: A SCREEN 9 paging demo with a space ship flying through a meteor shower. The Surprise? See the second code example, Joker.bas, which uses this example, mixed with TheBOB's White Cake Recipe program.
Code: (Select All)
'******************************************************
'---------------- P A G I N G . B A S -----------------
'------------- SCREEN 9 PAGING EXAMPLE ----------------
'--------- Uses compressed DATA to draw Ship ----------
'******************************************************
_TITLE "Paging.bas Demo by Bob Seguin"
DEFINT A-Z
DIM ShipBOX(6000)
ShipDATA:
DATA 34,0,1,5,73,0,7,5,4,7,1,15,73,0,6,5,1,7,77,0,6,5,1,7,77,0,6,5,1,7
DATA 77,0,5,5,2,7,77,0,4,5,3,7,77,0,3,5,5,7,76,0,8,7,76,0,9,7,75,0,10,7
DATA 74,0,11,7,73,0,12,7,69,0,2,5,1,2,7,7,3,5,3,7,3,5,2,7,61,0,1,8,3,5
DATA 1,2,6,7,1,5,3,7,1,5,3,7,10,5,55,0,1,8,2,7,2,2,6,7,1,2,3,7,1,2
DATA 4,7,7,5,2,2,1,15,54,0,1,8,2,7,2,2,6,7,1,2,3,7,1,2,5,7,6,5,2,2
DATA 1,15,54,0,1,8,1,7,3,2,7,7,3,2,12,7,2,2,1,5,46,0,1,8,7,5,1,8,4,2
DATA 22,7,2,2,1,5,46,0,1,8,7,5,1,8,4,2,22,7,2,2,47,0,1,8,12,5,22,7,44,0
DATA 4,4,2,8,6,7,8,5,2,7,11,2,7,7,1,5,41,0,2,4,4,14,2,8,6,7,6,2,3,5
DATA 1,7,1,2,9,7,1,2,8,7,1,5,39,0,1,4,2,14,4,15,2,8,6,7,9,2,1,5,1,2
DATA 9,7,1,2,8,7,2,5,37,0,1,4,1,14,6,15,2,8,6,7,21,2,7,7,5,5,2,9,1,15
DATA 1,4,1,15,2,9,1,7,1,5,27,0,1,4,2,14,4,15,2,8,6,7,13,2,13,7,10,5,8,7
DATA 1,15,25,0,2,4,4,14,2,8,7,7,15,2,9,7,13,5,6,7,1,5,27,0,4,4,2,8,25,2
DATA 36,5,21,0,2,8,10,2,36,5,2,10,4,9,1,15,2,9,2,7,6,5,1,15,18,0,2,8,8,7
DATA 2,2,36,7,4,10,2,9,1,5,4,9,1,5,6,12,1,5,17,0,2,8,8,7,2,2,36,7,4,10
DATA 2,9,1,7,4,9,1,5,6,12,1,5,6,15,11,0,2,8,8,7,2,2,36,7,4,10,2,9,1,7
DATA 4,9,1,5,6,12,1,5,17,0,2,8,8,5,38,2,2,10,4,9,1,2,2,9,8,7,1,5,14,0
DATA 4,4,2,8,25,5,36,2,15,0,2,4,4,14,2,8,7,7,15,5,12,7,10,5,6,7,1,5,24,0
DATA 1,4,2,14,4,15,2,8,6,7,13,5,13,7,10,5,8,7,1,15,23,0,1,4,1,14,6,15,2,8
DATA 5,7,1,2,11,5,10,2,2,7,10,5,2,9,1,15,1,4,1,15,2,9,1,7,1,5,27,0,1,4
DATA 2,14,4,15,2,8,4,7,2,2,9,5,2,2,9,7,1,2,1,7,9,5,39,0,2,4,4,14,2,8
DATA 3,7,3,2,6,5,3,2,1,7,1,2,9,7,1,2,9,5,42,0,4,4,2,8,2,7,12,2,2,7
DATA 11,2,8,5,48,0,1,8,14,2,8,7,12,5,49,0,1,8,7,2,1,8,3,5,1,2,9,7,15,5
DATA 47,0,1,8,7,2,1,8,3,5,1,2,8,7,10,5,1,7,3,5,2,2,1,15,54,0,1,8,3,5
DATA 1,2,6,7,1,5,1,7,2,15,7,5,1,7,4,5,2,2,1,15,54,0,1,8,8,7,2,5,1,7
DATA 3,5,1,15,5,5,2,7,4,5,2,2,1,5,54,0,1,8,2,7,2,2,4,7,2,5,1,7,3,5
DATA 1,7,4,5,2,7,5,5,2,2,1,5,54,0,1,8,1,7,3,2,3,7,3,5,1,7,3,5,1,7
DATA 3,5,3,7,5,5,2,2,57,0,3,2,3,7,4,5,3,7,3,5,5,2,66,0,4,7,8,5,72,0
DATA 6,7,5,5,73,0,5,7,5,5,74,0,5,7,4,5,75,0,5,7,3,5,76,0,6,7,2,5,76,0
DATA 7,7,77,0,7,7,77,0,7,7,77,0,7,7,77,0,7,7,76,0,11,7,1,15,82,0,1,5,49,0
DATA 16,0,6,4,3,0,3,4,5,14,2,0,2,4,2,14,5,15,1,0,2,4,1,14,7,15,2,0,2,4
DATA 2,14,5,15,3,0,3,4,5,14,5,0,6,4,60,0,6,4,3,0,3,4,5,14,2,0,2,4,2,14
DATA 5,15,1,0,2,4,1,14,7,15,2,0,2,4,2,14,5,15,3,0,3,4,5,14,5,0,6,4,11,0
SCREEN 9
'Set all attributes to black to hide draw/GET process
FOR n = 1 TO 15
PALETTE n, 0
NEXT n
'Ships differ in that the ship 2 rocket blasts are slightly larger
'Draw and GET ship 1 and mask
x = 0: y = 0
MaxWIDTH = 83
MaxDEPTH = 60
GOSUB DrawSHIP
GET (0, 0)-(MaxWIDTH, MaxDEPTH), ShipBOX()
GOSUB Mask
GET (0, 0)-(MaxWIDTH, MaxDEPTH), ShipBOX(1500)
'Redraw ship, add different rocket blasts,GET ship/mask
RESTORE ShipDATA
LINE (0, 0)-(83, 60), 0, BF
x = 0: y = 0
GOSUB DrawSHIP
'Draw different rocket blasts
x = 0: y = 20
MaxWIDTH = 10
MaxDEPTH = 40
GOSUB DrawSHIP
GET (0, 0)-(83, 60), ShipBOX(3000)
GOSUB Mask
GET (0, 0)-(83, 60), ShipBOX(4500)
TYPE RockTYPE 'establish data TYPE for meteors
Mx AS INTEGER 'meteor x coordinate
My AS INTEGER 'meteor y coordinate
Mr AS INTEGER 'meteor radius (fixed)
Ms AS INTEGER 'meteor speed (fixed)
END TYPE
DIM Rocks(1 TO 100) AS RockTYPE 'holds the location, size
'and speed of 100 meteors
FOR n = 1 TO 100 'loop to initialize meteor array
Rocks(n).Mx = FIX(RND * 640) 'initial x coordinates
Rocks(n).My = FIX(RND * 350) 'initial y coordinates
Rocks(n).Mr = FIX(RND * 5) + 2 'permanent radius (2-6 pixels)
SELECT CASE n 'speed variations create perspective
CASE 1 TO 30: Rocks(n).Ms = 12 'background meteors
CASE 31 TO 65: Rocks(n).Ms = 18 'midground meteors
CASE 66 TO 100: Rocks(n).Ms = 24 'foreground meteors
END SELECT
NEXT n
Rocks(50).Mr = 10 'meteor 50 specially sized (large)
Rocks(100).Mr = 16 'meteor 100 specially sized (larger)
ActivePAGE = 0: VisualPAGE = 1 'establish page variables for SWAP
SCREEN 9, , ActivePAGE, VisualPAGE 'page 0 active, page 1 visual
PALETTE
PALETTE 10, 0 'set palette values for attributes
PALETTE 12, 35 'which do not respond to OUT
'set palette values for attributes
'that respond to OUT
OUT &H3C8, 0
OUT &H3C9, 0
OUT &H3C9, 0 'background: midnight blue
OUT &H3C9, 12
OUT &H3C8, 1
OUT &H3C9, 16
OUT &H3C9, 8 'meteor: dark brown
OUT &H3C9, 2
OUT &H3C8, 2
OUT &H3C9, 32
OUT &H3C9, 32 'medium ship gray
OUT &H3C9, 32
OUT &H3C8, 3
OUT &H3C9, 22
OUT &H3C9, 12 'meteor highlight brown
OUT &H3C9, 5
OUT &H3C8, 4
OUT &H3C9, 63
OUT &H3C9, 0 'bright red
OUT &H3C9, 0
OUT &H3C8, 5
OUT &H3C9, 52
OUT &H3C9, 52 'ship light gray
OUT &H3C9, 52
'MAIN LOOP BEGINS -------------------------------
Count = 0
FOR x = 6 TO 546 STEP 2 'main loop wherein ship will
'travel 540 pixels in steps
'of two
b$ = INKEY$: IF b$ = CHR$(32) THEN b$ = CHR$(27)
CLS 'active screen cleared
OUT &H3C8, 0 'background color reestablished
OUT &H3C9, 0 'in case "space lightning" has
OUT &H3C9, 0 'flashed
OUT &H3C9, 12
'The following loop draws/updates x/y's of first 80 meteors
FOR n = 1 TO 80
GOSUB DrawMETEORS 'see DrawMETEORS subroutine
NEXT n
'Variable (Swerve) which causes ship to drift left and right
'is established and directional rockets are fired accordingly
SELECT CASE Switch 'both Swerve and Switch = 0 initially
CASE 0
Swerve = Swerve + 1
IF Swerve > 24 AND Swerve < 30 THEN 'directional rocket fired
LINE (x + 14, 171 + Swerve)-(x + 18, 173 + Swerve), 4, B
LINE (x + 10, 172 + Swerve)-(x + 18, 172 + Swerve), 14
LINE (x + 17, 172 + Swerve)-(x + 18, 172 + Swerve), 15
END IF
IF Swerve = 30 THEN Switch = 1 'pass to CASE 1
CASE 1
Swerve = Swerve - 1
IF Swerve > -30 AND Swerve < -26 THEN 'directional rocket fired
LINE (x + 14, 143 + Swerve)-(x + 18, 145 + Swerve), 4, B
LINE (x + 10, 144 + Swerve)-(x + 18, 144 + Swerve), 14
LINE (x + 17, 144 + Swerve)-(x + 18, 144 + Swerve), 15
END IF
IF Swerve = -30 THEN Switch = 0 'pass to CASE 0
END SELECT
'Ship masks/sprites PUT, variable "Count" toggling two sprites with
'differing degrees of rocket blast (to create sense of active rockets)
Count = Count + 1
IF Count MOD 2 THEN
PUT (x, 128 + Swerve), ShipBOX(1500), AND 'mask
PUT (x, 128 + Swerve), ShipBOX() 'sprite
ELSE
PUT (x, 128 + Swerve), ShipBOX(4500), AND 'mask
PUT (x, 128 + Swerve), ShipBOX(3000) 'sprite
END IF
'Second meteor-drawing loop draws last 20 meteors so that they *may*
'overdraw the ship (creating sense of its 'involvement' in meteor storm)
FOR n = 81 TO 100
GOSUB DrawMETEORS 'see DrawMETEORS subroutine
NEXT n
'PRINT section -------------------------------------
COLOR 8: LOCATE 24, 32: PRINT "Press SPACE to end...";
'Blurbs are printed (with gaps) based on the ship's x location
COLOR 13
SELECT CASE x
CASE IS < 150
LOCATE 21, 20: PRINT "The mission so far had been free of incident..."
CASE 161 TO 300
LOCATE 21, 20: PRINT "But on the seventeenth day, we encountered"
LOCATE 22, 20: PRINT "a meteor storm..."
CASE 311 TO 440
LOCATE 21, 20: PRINT "With every moment, we came closer to almost"
LOCATE 22, 20: PRINT "certain destruction..."
END SELECT
'-----------------------------------------------------
'Border line
LINE (0, 0)-(639, 349), 8, B
'"Space lightning" flash (1 chance in 25)
Flash = FIX(RND * 25)
IF Flash = 0 THEN
OUT &H3C8, 0
OUT &H3C9, 63 'set background (briefly) to bright red
OUT &H3C9, 0
OUT &H3C9, 0
END IF
REM IF INP(96) = 57 THEN EXIT FOR 'check for spacebar being pressed to exit
IF b$ = CHR$(27) THEN SYSTEM
'PAGING SECTION --------------------------------
SWAP ActivePAGE, VisualPAGE 'SWAP values of page variables...
SCREEN 9, , ActivePAGE, VisualPAGE 'which toggles active/visual page
'-----------------------------------------------
_DELAY .05
IF b$ = CHR$(27) THEN END
NEXT x 'main loop ends
RUN
'- SUBROUTINE SECTION BEGINS -------------------------
DrawMETEORS:
'If the meteor's x coordinate has moved off-screen to the left, it is as-
'signed a new random y coordinate, then reset to the right of the screen
IF Rocks(n).Mx < 0 THEN
Rocks(n).My = FIX(RND * 350)
Rocks(n).Mx = 642
END IF
'Meteors are drawn with lighter highlight circle offset +1/-1 pixel
CIRCLE (Rocks(n).Mx, Rocks(n).My), Rocks(n).Mr, 1
PAINT STEP(0, 0), 1
CIRCLE (Rocks(n).Mx + 1, Rocks(n).My - 1), Rocks(n).Mr - 2, 3
PAINT STEP(0, 0), 3
'Establish new location for each meteor by subtracting their
'individual speed (Ms) from their current x coordinate (Mx) ...
Rocks(n).Mx = Rocks(n).Mx - Rocks(n).Ms
RETURN
DrawSHIP:
DO
READ Count, Colr
FOR Reps = 1 TO Count
PSET (x, y), Colr
x = x + 1
IF x > MaxWIDTH THEN
x = 0
y = y + 1
END IF
NEXT Reps
LOOP UNTIL y > MaxDEPTH
RETURN
Mask:
FOR xx = 0 TO 83
FOR yy = 0 TO 60
IF POINT(xx, yy) = 0 THEN PSET (xx, yy), 15 ELSE PSET (xx, yy), 0
NEXT yy
NEXT xx
RETURN... And the surprise, Joker.bas
Description: Whenever we had a graphics emergency at The QBasic Forum, we always put up the Bat Signal ^^0^^ to call on TheBOB (aka The Batman) for help. One of Bob's creations, a recipe for White cake, and his Page Flipping Screen 9 demo were combined in the following code, but something went amiss that day in Gotham City...
Code: (Select All)
DEFINT A-Y
TYPE RockTYPE 'establish data TYPE for meteors
Mx AS INTEGER 'meteor x coordinate
My AS INTEGER 'meteor y coordinate
Mr AS INTEGER 'meteor radius (fixed)
Ms AS INTEGER 'meteor speed (fixed)
END TYPE
SCREEN 12, 0, 0, 0
_FULLSCREEN
FOR n = 1 TO 9
READ Attribute: OUT &H3C8, Attribute
FOR Reps = 1 TO 3
READ Intensity: OUT &H3C9, Intensity
NEXT Reps
NEXT n
PRINT
PRINT
COLOR 15
PRINT SPACE$(4); "W H I T E"; SPACE$(3); "C A K E"; SPACE$(3); "R E C I P E"
LINE (16, 60)-(620, 60), 9
LINE (16, 62)-(620, 62), 9
LINE (418, 60)-(542, 62), 0, BF
PRINT
PRINT
COLOR 12
PRINT SPACE$(4); "Heat oven to 350 degrees"
PRINT SPACE$(4); "Grease and flour 2 circular pans (8-9 inches)"
PRINT
COLOR 15
PRINT SPACE$(4); "CAKE:";
COLOR 11
PRINT SPACE$(9); "Flour: 2-1/4 cups"
PRINT SPACE$(18); "Sugar: 1-2/3 cups"
PRINT SPACE$(13); "Shortening: 2/3 cup"
PRINT SPACE$(19); "Milk: 1-1/4 cups"
PRINT SPACE$(10); "Baking powder: 3-1/2 tsps"
PRINT SPACE$(19); "Salt: 1 tsp"
PRINT SPACE$(16); "Vanilla: 1 tsp"
PRINT SPACE$(13); "Egg whites: 5 (reserve yolks for icing)"
PRINT
COLOR 12
PRINT SPACE$(4);
PRINT "Combine all ingredients except the egg whites in a bowl. Beat for 1/2"
PRINT SPACE$(4);
PRINT "minute at low speed, scraping bowl constantly, then 2 minutes at high"
PRINT SPACE$(4);
PRINT "speed, scraping bowl occasionally. Beat in egg whites, 2 minutes at"
PRINT SPACE$(4);
PRINT "high speed. Pour into pans. Bake until a toothpick inserted comes out"
PRINT SPACE$(4);
PRINT "clean or cake springs back when touched lightly (30 - 35 minutes)."
PRINT
COLOR 15
PRINT SPACE$(4); "ICING:";
COLOR 11
PRINT SPACE$(3); "Shortening: 2/3 cup"
PRINT SPACE$(17); "Butter: 2/3 cup"
PRINT SPACE$(14); "Egg yolks: 5"
PRINT SPACE$(16); "Vanilla: 1-1/2 tsps"
PRINT SPACE$(12); "Icing sugar: 3/4 cup or to taste"
CIRCLE (480, 86), 74, 1, , , .4
PAINT STEP(0, 0), 1
CIRCLE (480, 80), 72, 15, , , .4
PAINT STEP(0, 0), 15
CIRCLE (480, 79), 67, 9, , , .4
PAINT STEP(0, 0), 9
CIRCLE (480, 80), 72, 14, , , .4
CIRCLE (480, 78), 48, 15, , , .4
CIRCLE (480, 40), 60, 7, -4.5, -3.5, .4
PSET (423, 46), 7: DRAW "F2"
PAINT STEP(0, -10), 7
CIRCLE (480, 80), 60, 7, -4.5, -3.5, .4
PSET (423, 86), 7: DRAW "F2"
PAINT STEP(0, -10), 7
LINE (540, 40)-STEP(0, 40), 7
LINE (420, 40)-STEP(0, 40), 7
PAINT (430, 60), 7
PAINT (530, 60), 7
LINE (420, 40)-STEP(0, 40), 7
LINE STEP(4, -33)-STEP(0, 40), 7
LINE STEP(43, -24)-STEP(0, 40), 7
PAINT STEP(8, -18), 7
CIRCLE (480, 40), 60, 15, -4.5, -3.5, .4
LINE (540, 40)-STEP(0, 40), 15
LINE (420, 40)-STEP(0, 40), 15
LINE (420, 40)-STEP(0, 40), 15
LINE STEP(4, -33)-STEP(0, 40), 15
LINE STEP(43, -24)-STEP(0, 40), 15
PSET (430, 52), 4
DRAW "M+47,-7 M-9,+14 M-38,+6 U12 BR12 P4,4 BL13 D12 LU13Ld13"
PSET (427, 70), 4
DRAW "M+40,-7 D19 M-40,+7 U19 BF8 P4,4"
DIM Box(1000)
GET (427, 53)-(467, 78), Box()
PUT (427, 55), Box(), PSET
PSET (481, 40), 15
DRAW "M-13,+21"
PAINT (470, 30), 13, 15
FOR Reps = 1 TO 1200
X = FIX(RND * 60) + 420
y = FIX(RND * 54) + 40
IF POINT(X, y) = 4 THEN PSET (X, y), 15
NEXT Reps
PSET (427, 70), 2
DRAW "bM+40,-7 bD19 M-40,+7"
PSET (427, 70), 2
DRAW "bM+40,-7 bD20 M-30,+5"
CIRCLE (480, 80), 60, 2, 4.5, 6, .4
LINE (4, 4)-(635, 475), 9, B
FOR X = 524 TO 525
FOR y = 30 TO 100
IF POINT(X, y) = 7 THEN PSET (X, y), 13
NEXT y
NEXT X
FOR X = 528 TO 540
FOR y = 30 TO 100
IF POINT(X, y) = 7 THEN PSET (X, y), 13
NEXT y
NEXT X
CALL BSU
CALL SPACE
SYSTEM
PaletteDATA:
DATA 0,0,0,36,1,0,0,24,2,48,36,44,4,54,54,63,7,63,48,48,8
DATA 54,54,54,9,60,48,63,12,42,42,42,13,63,52,52,14,63,42,24
DEFSNG Z
SUB BSU
LOCATE 27, 60: PRINT CHR$(24);
LOCATE 28, 60: PRINT CHR$(219);: FIREPIN = 1
_DELAY 1
DO
b$ = INKEY$
_LIMIT 30
LOCATE 28, 62
PRINT "Press arrow up.";
LOCATE 28, 62
IF b$ = CHR$(0) + "H" THEN EXIT DO
_DELAY .45
PRINT " ";
IF b$ = CHR$(0) + "H" THEN EXIT DO
_DELAY .45
IF b$ = CHR$(27) THEN SYSTEM
LOOP UNTIL b$ = CHR$(0) + "H"
b$ = CHR$(13)
LOCATE 28, 60: PRINT " ";
FIREMISSILE:
FOR I = 1 TO 25
LOCATE 28 - I, 60: PRINT " ";
LOCATE CSRLIN - 1, 60: PRINT CHR$(24);
Z = TIMER
DO
LOOP UNTIL ABS(Z - TIMER) >= .02: 'DELAY LOOP
NEXT
FOR I = 1 TO 5
SOUND 2000, 2: SOUND 500, 2
WAIT &H3DA, 8
WAIT &H3DA, 8, 8
OUT &H3C8, 12
IF I >= 3 THEN
IF I / 2 <> I \ 2 THEN OUT &H3C8, 33 ELSE OUT &H3C8, 0
ELSE
OUT &H3C8, 0
OUT &H3C9, 63 'set background (briefly) to bright red
OUT &H3C9, 0
OUT &H3C9, 0
END IF
NEXT I
Z = TIMER
DO
LOOP UNTIL ABS(Z - TIMER) >= 1.5: 'DELAY LOOP
END SUB
SUB SPACE
SCREEN 9
'Set all attributes to black to hide draw/GET process
FOR n = 1 TO 15
PALETTE n, 0
NEXT n
'Ships differ in that the ship 2 rocket blasts are slightly larger
'Draw and GET ship 1 and mask
X = 0: Y = 0
MaxWIDTH = 83
MaxDEPTH = 60
DIM Rocks(1 TO 100) AS RockTYPE 'holds the location, size
'and speed of 100 meteors
IF X < 326 THEN
FOR n = 1 TO 100 'loop to initialize meteor array
Rocks(n).Mx = FIX(RND * 640) 'initial x coordinates
Rocks(n).My = FIX(RND * 350) 'initial y coordinates
Rocks(n).Mr = FIX(RND * 5) + 2 'permanent radius (2-6 pixels)
SELECT CASE n 'speed variations create perspective
CASE 1 TO 30: Rocks(n).Ms = 12 'background meteors
CASE 31 TO 65: Rocks(n).Ms = 18 'midground meteors
CASE 66 TO 100: Rocks(n).Ms = 24 'foreground meteors
END SELECT
NEXT n
Rocks(50).Mr = 10 'meteor 50 specially sized (large)
Rocks(100).Mr = 16 'meteor 100 specially sized (larger)
ELSE
Z = TIMER: DO: IF ABS(Z - TIMER) > .1 THEN EXIT DO
LOOP
END IF
ActivePAGE = 0: VisualPAGE = 1 'establish page variables for SWAP
SCREEN 9, , ActivePAGE, VisualPAGE 'page 0 active, page 1 visual
PALETTE
PALETTE 10, 0 'set palette values for attributes
PALETTE 12, 35 'which do not respond to OUT
'set palette values for attributes
'that respond to OUT
OUT &H3C8, 0
OUT &H3C9, 0
OUT &H3C9, 0 'background: midnight blue
OUT &H3C9, 12
OUT &H3C8, 1
OUT &H3C9, 16
OUT &H3C9, 8 'meteor: dark brown
OUT &H3C9, 2
OUT &H3C8, 2
OUT &H3C9, 32
OUT &H3C9, 32 'medium ship gray
OUT &H3C9, 32
OUT &H3C8, 3
OUT &H3C9, 22
OUT &H3C9, 12 'meteor highlight brown
OUT &H3C9, 5
OUT &H3C8, 4
OUT &H3C9, 63
OUT &H3C9, 0 'bright red
OUT &H3C9, 0
OUT &H3C8, 5
OUT &H3C9, 52
OUT &H3C9, 52 'ship light gray
OUT &H3C9, 52
'MAIN LOOP BEGINS -------------------------------
Count = 0
FOR X = 6 TO 546 STEP 2 'main loop wherein ship will
_DELAY .115 ' Reading speed
'travel 540 pixels in steps
'of two
CLS 'active screen cleared
OUT &H3C8, 0 'background color reestablished
OUT &H3C9, 0 'in case "space lightning" has
OUT &H3C9, 0 'flashed
OUT &H3C9, 12
'The following loop draws/updates x/y's of first 80 meteors
IF X < 326 THEN
FOR n = 1 TO 80
GOSUB DrawMETEORS 'see DrawMETEORS subroutine
NEXT n
'Second meteor-drawing loop draws last 20 meteors so that they *may*
'overdraw the ship (creating sense of its 'involvement' in meteor storm)
FOR n = 81 TO 100
GOSUB DrawMETEORS 'see DrawMETEORS subroutine
NEXT n
ELSE
''Z = TIMER: DO: IF ABS(Z - TIMER) > .1 THEN EXIT DO
''LOOP
END IF
Z = TIMER: DO: IF ABS(Z - TIMER) > .05 THEN EXIT DO
LOOP
'PRINT section -------------------------------------
'Blurbs are printed (with gaps) based on the ship's x location
COLOR 13: A1 = 30
SELECT CASE X
CASE 10 + A1 TO 100 + A1
LOCATE 21, 19: PRINT "Kirk to Spock. What are those strange looking"
LOCATE 22, 31: PRINT "blobs on the screen?"
CASE 101 + A1 TO 170 + A1
LOCATE 21, 21: PRINT "Sensors indicate they are the remains of"
LOCATE 22, 23: PRINT "TheBob's White Cake Recipe, Captain."
CASE 171 + A1 TO 240 + A1
LOCATE 21, 15: PRINT "Kirk to Scottie. Beam those pieces of cake on board!"
CASE 241 + A1 TO 317 + A1
LOCATE 21, 19: PRINT "Aye Captain, I'll get right on it, as soon as"
LOCATE 22, 28: PRINT "I finish my Dunkin Donuts."
CASE 336 + A1 TO 435 + A1
LOCATE 21, 15: PRINT "Kirk to Sick Bay. Bones, MEDICAL EMERGENCY! Report to"
LOCATE 22, 13: PRINT "the Transporter Room and put TheBob's cake back together!"
CASE IS > 440 + A1
LOCATE 21, 19: PRINT "Dammit Jim. I'm a doctor, not Martha Stewart!"
END SELECT
'-----------------------------------------------------
'Border line
LINE (0, 0)-(639, 349), 8, B
'"Space lightning" flash (1 chance in 25)
'Flash = FIX(RND * 25)
IF X = 326 THEN
SOUND 1000, .5: SOUND 2000, .5: SOUND 3000, .5: SOUND 4000, .5: SOUND 5000, .5: SOUND 6000, .5
SOUND 6000, .5: SOUND 7000, .5: SOUND 8000, .5: SOUND 4000, .5: SOUND 9000, .5
OUT &H3C8, 0
OUT &H3C9, 63 'set background (briefly) to bright red
OUT &H3C9, 0
OUT &H3C9, 0
END IF
'PAGING SECTION --------------------------------
SWAP ActivePAGE, VisualPAGE 'SWAP values of page variables...
SCREEN 9, , ActivePAGE, VisualPAGE 'which toggles active/visual page
'-----------------------------------------------
WAIT &H3DA, 8
WAIT &H3DA, 8, 8
NEXT X 'main loop ends
SCREEN 9, 0, 0, 0
LOCATE 21, 5: PRINT SPACE$(70);
LOCATE 22, 5: PRINT SPACE$(70);
_DELAY 1
LEVEL1 = 10
A1$ = " [Sometimes The Joker Wins!]"
REDIM BAT$(3)
BAT$(3) = "^^o^^"
BAT$(2) = "--o--"
BAT$(1) = "vvovv"
LOCATE LEVEL1, 2
_DELAY 1
FOR I = 1 TO 12
FOR J = 1 TO 3
IF I = 1 AND J = 1 THEN LOCATE , 3 ELSE PRINT " ";
PRINT BAT$(J);
LOCATE , POS(1) - 5
Z = TIMER
DO: IF ABS(Z - TIMER) > .1 THEN EXIT DO
LOOP
NEXT J
NEXT I
_DELAY 1
FOR I = 2 TO LEVEL1
IF I = LEVEL1 - 1 THEN SOUND 3000, .7: SOUND 358, 1.5: SOUND 5000, 1
IF I <> 2 THEN LOCATE I - 1, 27: PRINT SPACE$(28);
LOCATE I, 27: PRINT A1$;
Z = TIMER
DO: IF ABS(Z - TIMER) > .1 THEN EXIT DO
LOOP
NEXT
_DELAY 4
SYSTEM
'- SUBROUTINE SECTION BEGINS -------------------------
DrawMETEORS:
'If the meteor's x coordinate has moved off-screen to the left, it is as-
'signed a new random y coordinate, then reset to the right of the screen
IF Rocks(n).Mx < 0 THEN
Rocks(n).My = FIX(RND * 350)
Rocks(n).Mx = 642
END IF
'Meteors are drawn with lighter highlight circle offset +1/-1 pixel
CIRCLE (Rocks(n).Mx, Rocks(n).My), Rocks(n).Mr, 1
PAINT STEP(0, 0), 1
CIRCLE (Rocks(n).Mx + 1, Rocks(n).My - 1), Rocks(n).Mr - 2, 3
PAINT STEP(0, 0), 3
'Establish new location for each meteor by subtracting their
'individual speed (Ms) from their current x coordinate (Mx) ...
Rocks(n).Mx = Rocks(n).Mx - Rocks(n).Ms
RETURN
Mask:
FOR xx = 0 TO 83
FOR yy = 0 TO 60
IF POINT(xx, yy) = 0 THEN PSET (xx, yy), 15 ELSE PSET (xx, yy), 0
NEXT yy
NEXT xx
RETURN
END SUB