{{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 ====
   	' (2)
   	OPTION EXPLICIT
   
   	' (3)
   	DIM p AS FLOAT
   	DIM q AS INT
   	DIM xp AS FLOAT, yp AS FLOAT, zp AS FLOAT
   	DIM xf AS FLOAT, yf AS FLOAT, zf AS FLOAT
   	DIM xr AS FLOAT, yr AS FLOAT, zr AS FLOAT
   	DIM xt AS FLOAT, yt AS FLOAT, zt AS FLOAT
   	DIM xx AS FLOAT, yy AS FLOAT, zz AS FLOAT
   	DIM zi AS INTEGER
   	DIM p1 AS INTEGER
   	DIM zt AS FLOAT
   	DIM xl AS INTEGER, yl AS INTEGER
   	DIM x1 AS INTEGER, y1 AS INTEGER
   	
   	' (4)
   	BITMAP ENABLE (320,200,16)
   	
   	CLS BLACK
   	
   	p1=160
   	q=100
   	xp=144
   	xr=01.5*PI
   	yp=56
   	yr=01
   	
   	zp=64
   	xf=xr/xp
   	yf=yp/yr
   	zf=xr/zp
   	
   	FOR zi=-q TO q-1
   	
   		IF zi<-zp OR zi>zp THEN GOTO endloop
   		
   		zt=zi*xp/zp
   		zz=zi
   		xl=INT(.5+SQR((xp*xp)-(zt*zt)))
   		
   		FOR xi=-xl TO xl
   			DEGREE
   			xt=(SQR(xi*xi+zt*zt)*xf)*180/PI:xx=xi
   			yy=(SIN (xt)+.4*SIN (3*xt))*yf
   			GOSUB continue
   		NEXT
   endloop:
   	NEXT
   loop:
   	GOTO loop
   
   continue:
   	x1=xx+zz+p1
   	' (10)
   	' PRINT "yy = ";yy;" zz = ";zz;" q = ";q
   	y1=INT(yy-zz+q)
   	' (11)
   	' PRINT "y1 = ";y1
   	' (5)
   	
   	PLOT x1,y1,GREEN
   	' (12)
   	' PRINT "PLOT AT ";x1;",";y1
   	
   	IF y1=0 THEN GOTO draw_line
   	
   	' Fix? (1)
   	' RETURN
   	
   draw_line:
   	' (6)
   	INK YELLOW
   	' (7)
   	LINE x1,y1-1 TO x1,0
   	' PRINT "LINE ";x1;"-";y1;" TO ";x1;",0"
   	RETURN


==== SOURCE FILE ====
  * ''[[https://github.com/spotlessmind1975/ugbasic/tree/main/examples/bug2.bas|bug2.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 bug2.bas -o example.xex
   altirra example.xex
   
   # Windows 
   ugbc.atari.exe bug2.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 bug2.bas -o example.xex
   altirra example.xex
   
   # Windows 
   ugbc.atarixl.exe bug2.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 bug2.bas -o example.prg
   x64sc example.prg
   
   # Windows 
   ugbc.c64.exe bug2.bas -o example.prg
   x64sc example.prg
=== Commodore 64+REU ===
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.c64reu bug2.bas -o example.prg
   x64sc -reu example.prg
   
   # Windows 
   ugbc.c64reu.exe bug2.bas -o example.prg
   x64sc -reu 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 bug2.bas -o example.prg
   yape example.prg
   
   # Windows 
   ugbc.plus4.exe bug2.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 bug2.bas -o example.prg
   xplus4 example.prg
   
   # Windows 
   ugbc.plus4.exe bug2.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 bug2.bas -o example.bin
   xroar -rompath (your rom path) example.bin
   
   # Windows 
   ugbc.d32.exe bug2.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 bug2.bas -o example.bin
   xroar -rompath (your rom path) example.bin
   
   # Windows 
   ugbc.d64.exe bug2.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 bug2.bas -o example.k7
   dcmoto
   (choose BASIC 128)
   CLEAR,&H2FFF: LOADM"CASS:",R: EXEC
   
   # Windows 
   ugbc.pc128op.exe bug2.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 bug2.bas -o example.k7
   dcmoto
   (choose BASIC 128)
   CLEAR,&H2FFF: LOADM"CASS:",R: EXEC
   
   # Windows 
   ugbc.pc128op.exe bug2.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 bug2.bas -o example.prg
   xvic --memory 24k example.prg
   
   # Windows 
   ugbc.vic20.exe bug2.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 bug2.bas -o example.tap
   Speccy example.tap
   
   # Windows 
   ugbc.zx.exe bug2.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 bug2.bas -o example.rom
   openmsx -cart example.rom
   
   # Windows 
   ugbc.msx1.exe bug2.bas -o example.rom
   openmsx -cart example.rom
== blueMSX ==
   # Linux 
   ugbc.msx1 bug2.bas -o example.rom
   bluemsx example.rom
   
   # Windows 
   ugbc.msx1.exe bug2.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 bug2.bas -o example.rom
   openmsx -machine \"COL - ColecoVision\" -cart example.rom
   
   # Windows 
   ugbc.coleco.exe bug2.bas -o example.rom
   bluemsx -machine \"COL - ColecoVision\" example.rom
== blueMSX ==
   # Linux 
   ugbc.coleco bug2.bas -o example.rom
   bluemsx /machine \"COL - ColecoVision\" /rom1 example.rom
   
   # Windows 
   ugbc.coleco.exe bug2.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 bug2.bas -o example.rom
   bluemsx /machine \"SEGA - SC-3000\" /rom1 example.rom
   
   # Windows 
   ugbc.sc3000.exe bug2.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 bug2.bas -o example.rom
   bluemsx /machine \"SEGA - SG-1000\" /rom1 example.rom
   
   # Windows 
   ugbc.sg1000.exe bug2.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 |}}]]