{{htmlmetatags>metatag-robots=()
metatag-title=(  | ugBASIC User Manual)
metatag-keywords=(ugBASIC,Commodore 64,Commodore PLUS/4,ZX Spectrum)
metatag-description=(An isomorphic language for retrocomputers)
metatag-media-og:image=(:ugbasic:logo-ugbasic-fb.png)
metatag-og:title=(  | ugBASIC User Manual) 
metatag-og:description=(An isomorphic language for retrocomputers)
}}

====== ugBASIC User Manual ======

=====   =====

==== PURPOSE ====


==== SOURCE CODE ====
   DEFINE STRING SPACE 128
   DEFINE STRING COUNT 16
   
   BITMAP ENABLE(16)
   
   CONST balls = 4
   CONST step = 2
   CONST levels = SCREEN HEIGHT / 16
   CONST screenLimitH = ( SCREEN HEIGHT - 16 )
   CONST screenLimitW = ( SCREEN WIDTH - 16 )
   CONST ballStep = (SCREEN WIDTH / balls)
   
   DIM x(balls), y(balls), dx(balls), dy(balls), d@(balls), m@(balls)
   
   GLOBAL x, y, f, dx, dy, d, m
   
   GLOBAL ball, bar, bgball
   GLOBAL basket
   
   PROCEDURE prepareGraphics
   
   	bgball := NEW IMAGES(balls,16,10)
   	
   	CLS BLACK
   	INK GREY
   	BAR 0,0 TO 15,3
   	INK BLUE
   	DRAW"L16R2U3L2R16L2D3L4U3L3D3"
   	bar := NEW IMAGE(16,4)
   	GET IMAGE bar FROM 0, 0
   
   	CLS 
   	INK GREY
   	BAR 0,0 TO 7,7
   	INK BLUE
   	DRAW"BU8D8L7U8"
   	basket := NEW IMAGE(8,8)
   	GET IMAGE basket FROM 0, 0
   	
   	CLS
   	INK RED
   	CIRCLE 4,4,4
   	PAINT(4,4)
   	INK WHITE
   	DRAW"BU2L1D1L1D1"
   	ball := NEW IMAGE(16,10)
   	GET IMAGE ball FROM 0, 0
   	
   	CLS
   
   	i = 0
   	ty = 16
   	REPEAT
   		tx = (i * ballStep) + step
   		x(i) = tx
   		y(i) = ty
   '		dx(i) = 0
   '		dy(i) = 0
   		GET IMAGE bgball FRAME i FROM tx, ty
   		INC i
   	UNTIL i = balls
   	FILL d WITH 1
   	FILL m WITH 0
   	
   END PROCEDURE
   
   GLOBAL bx, by
   
   PROCEDURE drawBarrier
   	bx = 0
   	i = 0: j = RND(255)
   	REPEAT
   		IF (j AND 1) = 0 THEN
   			PUT IMAGE bar AT bx, by
   		ENDIF
   		j = j \ 2
   		ADD bx, 16
   		INC i
   	UNTIL bx > screenLimitW
   END PROCEDURE
   
   PROCEDURE drawBarriersAndBaskets
   	by = 16
   	REPEAT
   		drawBarrier[]
   		ADD by, 16
   	UNTIL by > screenLimitH - 16
   	bx = 0
   	REPEAT
   		PUT IMAGE basket AT bx, by
   		ADD bx, 16
   	UNTIL bx > screenLimitW
   END PROCEDURE
   
   PARALLEL PROCEDURE moveBall
   	REPEAT
   		WAIT WHILE [d]
   		IF POINT([x]+3,[y]+9) = BLACK THEN
   			[dy] = step
   			[dx] = 0
   		ELSE
   			[dy] = 0
   			IF [dx] = 0 THEN
   				IF RND(100) > 50 THEN
   					[dx] = step
   				ELSE
   					[dx] = -step
   				ENDIF
   			ENDIF
   			IF [x] >= screenLimitW THEN
   				[dx] = -[dx]
   			ELSEIF [x] < step THEN
   				[dx] = -[dx]
   			ELSEIF POINT([x]+9,[y]+4) <> BLACK THEN
   				[dx] = -[dx]
   			ELSE IF POINT([x]-3,[y]+4) <> BLACK THEN
   				[dx] = -[dx]
   			ENDIF
   		ENDIF
   		[m] = 1
   		[d] = 1
   	UNTIL [y] > SCREEN HEIGHT	
   END PROCEDURE
   
   PROCEDURE waitRaster
   
   		maxy = 0
   		i = balls-1
   		REPEAT
   			NOP
   			WAIT WHILE m(i)
   			NOP
   			IF maxy < y(i) THEN
   				maxy = y(i) + 15
   			ENDIF
   			DEC i
   		UNTIL i < 0
   		IF maxy > 0 THEN
   			WHILE RASTER LINE < maxy
   			WEND
   		ENDIF
   			
   END PROC
   
   PARALLEL PROCEDURE drawBalls
   
   	DO
   		waitRaster[]
   		FORBID
   		i = balls-1:
   		REPEAT
   			d(i) = 1
   			PUT IMAGE bgball FRAME i AT x(i),y(i)
   			DEC i
   		UNTIL i < 0
   		i = 0:
   		REPEAT
   			ADD x(i), dx(i)
   			ADD y(i), dy(i)
   			GET IMAGE bgball FRAME i FROM x(i),y(i)
   			IF dx(i) <> 0 AND dy(0) <> 0 THEN
   				PUT IMAGE ball AT x(i), y(i) WITH TRANSPARENCY
   			ENDIF
   			INC i
   		UNTIL i = balls
   		FILL d WITH 0
   		ALLOW
   	LOOP
   	
   END PROCEDURE
   
   'PARALLEL PROCEDURE movePlayer
   '
   '	DO
   '		WHILE pdelay: DEC pdelay: WEND
   '		IF JUP(0) AND ply > 0 AND POINT(plx + 4, ply - 16) = BLACK THEN
   '			ADD ply, -16
   '			pdelay = 10
   '		ENDIF
   '		IF JDOWN(0) AND ply < screenLimitH AND POINT(plx + 4, ply + 16) = BLACK THEN
   '			ADD ply, 16
   '			pdelay = 10
   '		ENDIF
   '		IF JLEFT(0) AND plx > 16 AND POINT(plx - step, ply) = BLACK THEN
   '			ADD plx, -step
   '			pdelay = 10
   '		ENDIF
   '		IF JRIGHT(0) AND plx < screenLimitH AND POINT(plx + 8 + step, ply) = BLACK THEN
   '			ADD plx, step
   '			pdelay = 10
   '		ENDIF
   '	LOOP
   '		
   'END PROC
   
   prepareGraphics[]
   drawBarriersAndBaskets[]
   
   SPAWN drawBalls
   
   'SPAWN movePlayer
   
   
   


==== SOURCE FILE ====
  * ''[[https://github.com/spotlessmind1975/ugbasic/tree/main/examples/contrib_game_old.bas|contrib_game_old.bas]]''
==== HOW TO COMPILE AND RUN ====
The instructions here refer to compiling the example from the command line. For Microsoft Windows users we suggest using **[[https://spotlessmind1975.itch.io/ugbasic-ide|UGBASIC-IDE]]**, which allows you to compile the example with just one click.=== ATARI 400/800 family ===
In order to compile and run the example, you need to have the Altirra emulator, and in particular that the ''altirra'' executable is accessible.

Then, type this command on the command line:

   # Linux 
   ugbc.atari contrib_game_old.bas -o example.xex
   altirra example.xex
   
   # Windows 
   ugbc.atari.exe contrib_game_old.bas -o example.xex
   altirra example.xex
=== ATARI 600XL/800XL/1200XL/XG(SE) family ===
In order to compile and run the example, you need to have the Altirra emulator, and in particular that the ''altirra'' executable is accessible.

Then, type this command on the command line:

   # Linux 
   ugbc.atarixl contrib_game_old.bas -o example.xex
   altirra example.xex
   
   # Windows 
   ugbc.atarixl.exe contrib_game_old.bas -o example.xex
   altirra example.xex
=== Commodore 64 ===
In order to compile and run the example, you need to have the VICE emulator, and in particular that the ''x64sc'' executable is accessible.

Then, type this command on the command line:

   # Linux 
   ugbc.c64 contrib_game_old.bas -o example.prg
   x64sc example.prg
   
   # Windows 
   ugbc.c64.exe contrib_game_old.bas -o example.prg
   x64sc example.prg
=== Commodore PLUS/4 ===
== Using YAPE ==
In order to run the example, you need to have the YAPE emulator. In particular that the ''yape'' executable is accessible.

Then, type this command on the command line:

   # Linux 
   ugbc.plus4 contrib_game_old.bas -o example.prg
   yape example.prg
   
   # Windows 
   ugbc.plus4.exe contrib_game_old.bas -o example.prg
   yape example.prg
== Using VICE ==
In order to run the example, you need to have the VICE emulator. In particular that the ''xplus4'' executable is accessible.

Then, type this command on the command line:

   # Linux 
   ugbc.plus4 contrib_game_old.bas -o example.prg
   xplus4 example.prg
   
   # Windows 
   ugbc.plus4.exe contrib_game_old.bas -o example.prg
   xplus4 example.prg
=== Dragon 32 ===
In order to compile and run the example, you need to have the XROAR emulator, and in particular that the ''xroar'' executable is accessible.

Then, type this command on the command line:

   # Linux 
   ugbc.d32 contrib_game_old.bas -o example.bin
   xroar -rompath (your rom path) example.bin
   
   # Windows 
   ugbc.d32.exe contrib_game_old.bas -o example.bin
   xroar.exe -rompath (your rom path) example.bin
=== Dragon 64 ===
In order to compile and run the example, you need to have the XROAR emulator, and in particular that the ''xroar'' executable is accessible.

Then, type this command on the command line:

   # Linux 
   ugbc.d64 contrib_game_old.bas -o example.bin
   xroar -rompath (your rom path) example.bin
   
   # Windows 
   ugbc.d64.exe contrib_game_old.bas -o example.bin
   xroar.exe -rompath (your rom path) example.bin
=== PC128 Olivetti Prodest ===
In order to compile and run the example, you need to have the DCMOTO emulator, and in particular that the ''dcmoto'' executable is accessible.

Then, type this command on the command line and on the emulator:

   # Linux 
   ugbc.pc128op contrib_game_old.bas -o example.k7
   dcmoto
   (choose BASIC 128)
   CLEAR,&H2FFF: LOADM"CASS:",R: EXEC
   
   # Windows 
   ugbc.pc128op.exe contrib_game_old.bas -o example.k7
   dcmoto
   (choose example.k7)
   (choose BASIC 128)
   CLEAR,&H2FFF: LOADM"CASS:",R: EXEC
=== Thomson MO5 ===
In order to compile and run the example, you need to have the DCMOTO emulator, and in particular that the ''dcmoto'' executable is accessible.

Then, type this command on the command line and on the emulator:

   # Linux 
   ugbc.pc128op contrib_game_old.bas -o example.k7
   dcmoto
   (choose BASIC 128)
   CLEAR,&H2FFF: LOADM"CASS:",R: EXEC
   
   # Windows 
   ugbc.pc128op.exe contrib_game_old.bas -o example.k7
   dcmoto
   (choose example.k7)
   (choose BASIC 128)
   CLEAR,&H2FFF: LOADM"CASS:",R: EXEC
=== Commodore VIC-20 ===
In order to compile and run the example, you need to have the VICE emulator, and in particular that the ''xvic'' executable is accessible.

Then, type this command on the command line:

   # Linux 
   ugbc.vic20 contrib_game_old.bas -o example.prg
   xvic --memory 24k example.prg
   
   # Windows 
   ugbc.vic20.exe contrib_game_old.bas -o example.prg
   xvic --memory 24k example.prg
=== ZX Spectrum ===
In order to compile and run the example, you need to have the Speccy emulator, and in particular that the ''speccy'' executable is accessible.

Then, type this command on the command line:

   # Linux 
   ugbc.zx contrib_game_old.bas -o example.tap
   Speccy example.tap
   
   # Windows 
   ugbc.zx.exe contrib_game_old.bas -o example.tap
   Speccy example.tap
=== MSX ===
In order to compile and run the example, you need to have the openMsx or the BlueMSX emulator, and in particular that its executable is accessible.

Then, type this command on the command line:

== openMSX ==
   # Linux 
   ugbc.msx1 contrib_game_old.bas -o example.rom
   openmsx -cart example.rom
   
   # Windows 
   ugbc.msx1.exe contrib_game_old.bas -o example.rom
   openmsx -cart example.rom
== blueMSX ==
   # Linux 
   ugbc.msx1 contrib_game_old.bas -o example.rom
   bluemsx example.rom
   
   # Windows 
   ugbc.msx1.exe contrib_game_old.bas -o example.rom
   bluemsx example.rom
=== ColecoVision ===
In order to compile and run the example, you need to have the openMsx or the BlueMSX emulator, and in particular that its executable is accessible.

Then, type this command on the command line:

== openMSX ==
   # Linux 
   ugbc.coleco contrib_game_old.bas -o example.rom
   openmsx -machine \"COL - ColecoVision\" -cart example.rom
   
   # Windows 
   ugbc.coleco.exe contrib_game_old.bas -o example.rom
   bluemsx -machine \"COL - ColecoVision\" example.rom
== blueMSX ==
   # Linux 
   ugbc.coleco contrib_game_old.bas -o example.rom
   bluemsx /machine \"COL - ColecoVision\" /rom1 example.rom
   
   # Windows 
   ugbc.coleco.exe contrib_game_old.bas -o example.rom
   bluemsx  /machine \"COL - ColecoVision\" /rom1 example.rom
=== SEGA SC-3000 ===
In order to compile and run the example, you need to have the BlueMSX emulator, and in particular that its executable is accessible.

Then, type this command on the command line:

   # Linux 
   ugbc.sc3000 contrib_game_old.bas -o example.rom
   bluemsx /machine \"SEGA - SC-3000\" /rom1 example.rom
   
   # Windows 
   ugbc.sc3000.exe contrib_game_old.bas -o example.rom
   bluemsx  /machine \"SEGA - SC-3000\" /rom1 example.rom
=== SEGA SG-1000 ===
In order to compile and run the example, you need to have the BlueMSX emulator, and in particular that its executable is accessible.

Then, type this command on the command line:

   # Linux 
   ugbc.sg1000 contrib_game_old.bas -o example.rom
   bluemsx /machine \"SEGA - SG-1000\" /rom1 example.rom
   
   # Windows 
   ugbc.sg1000.exe contrib_game_old.bas -o example.rom
   bluemsx  /machine \"SEGA - SG-1000\" /rom1 example.rom
==== ANY PROBLEM? ====
If you have found a problem trying to run this example, if you think there is a bug or, more simply, you would like it to be improved, [[https://github.com/spotlessmind1975/ugbasic/issues/new?title=IMPROVE  |open an issue]] for this example on GitHub. Thank you!===== POWERED BY =====

[[:ugbasic:user:examples|{{ :ugbasic:user:logo-ugbasic.png?nolink&600 |}}]]