OTHER CONTRIBUTIONS: 3D ROTATING CUBE

This small example shows how a rotating cube can be drawn in BASIC on various 8-bit home computers, using the same source. Despite the fact that the rotation seems quite fast, the whole thing hasn't been optimized in the slightest. There are large possibilities for optimization of the code.

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SOURCE CODE ()

	DIM t AS BYTE : DIM z AS BYTE
	DIM p AS POSITION(5), q AS POSITION(5), x AS POSITION(5), y AS POSITION(5)

	DIM aa AS INTEGER, bb AS INTEGER

	a=20 : b=20 : aa = (a^2) : bb = (a^2): f=bb/aa : c=70 : d=45  : e=c

	buf := NEW IMAGE(64,72)
	GET IMAGE buf FROM 0,0

	FOR z=1 TO a STEP 1

		WAIT VBL
		
		PUT IMAGE buf AT 32, 24

		FOR t=1 TO 4 : p(t)=x(t) : q(t)=y(t) : NEXT	
		
		y(1)=SQR((b^2)-((z^2)*f)) : x(4)=a-z
		y(2)=SQR((b^2)-((x(4)^2)*f)) : x(3)=-z
		y(3)=-y(1) : x(2)=-x(4)
		y(4)=-y(2) : x(1)=z
		
		FOR t=1 TO 4
		
			u=t+1
			IF t=4 THEN : u=1 : ENDIF
			
			' SET LINE 0
			'x1=p(t)+c:y1=q(t)+d:x2=p(u)+c:y2=q(u)+d
			'LINE x1,y1 TO x2,y2,BLACK
			
			' SET LINE %1111111111111111
			x1=x(t)+c:y1=y(t)+d:x2=x(u)+c:y2=y(u)+d
			LINE x1,y1 TO x2,y2,WHITE

			' SET LINE 0
			'x1=p(t)+c:y1=q(t)+e:x2=p(u)+c:y2=q(u)+e
			'LINE x1,y1 TO x2,y2,BLACK
			
			' SET LINE %1111111111111111
			x1=x(t)+c:y1=y(t)+e:x2=x(u)+c:y2=y(u)+e
			LINE x1,y1 TO x2,y2,WHITE
			
			' SET LINE 0
			'x1=p(t)+c:y1=q(t)+d:x2=p(t)+c:y2=q(t)+e
			'LINE x1,y1 TO x2,y2,BLACK
			
			' SET LINE %1111111111111111
			x1=x(t)+c:y1=y(t)+d:x2=x(t)+c:y2=y(t)+e
			LINE x1,y1 TO x2,y2,WHITE
			
		NEXT
		
	NEXT

How to compile and run the example

The instructions here refer to compiling the example from the command line. For Microsoft Windows users we suggest using UGBASIC-IDE, which allows you to download and compile each single example with just one click.



Are instructions for your specific home computer / console missing? First of all, check if your computer is supported by clicking here. If so, since ugBASIC is a language which does not provide abstractions, it is possible that this example will not work on your target. If you think this is an issue, please click here.

Amstrad CPC 464, Amstrad CPC 6128, Amstrad CPC 664

In order to compile the example, type this command on the command line:

Linux

ugbc.cpc -O dsk -o contrib_cube.dsk contrib_cube.bas

Windows

ugbc.cpc.exe -O dsk -o contrib_cube.dsk contrib_cube.bas

For Microsoft Windows users we suggest using UGBASIC-IDE, which allows you to download and compile this example with just one click.

Atari 1200XL, Atari 130XE, Atari 600XL, Atari 65XE, Atari 800XE, Atari 800XL, Atari XEGS

In order to compile the example, type this command on the command line:

Linux

ugbc.atarixl -O xex -o contrib_cube.xex contrib_cube.bas

Windows

ugbc.atarixl.exe -O xex -o contrib_cube.xex contrib_cube.bas

For Microsoft Windows users we suggest using UGBASIC-IDE, which allows you to download and compile this example with just one click.

Atari 400, Atari 800

In order to compile the example, type this command on the command line:

Linux

ugbc.atari -O xex -o contrib_cube.xex contrib_cube.bas

Windows

ugbc.atari.exe -O xex -o contrib_cube.xex contrib_cube.bas

For Microsoft Windows users we suggest using UGBASIC-IDE, which allows you to download and compile this example with just one click.

Commodore 128 (CPU 8502)

In order to compile the example, type this command on the command line:

Linux

ugbc.c128 -O prg -o contrib_cube.prg contrib_cube.bas

Windows

ugbc.c128.exe -O prg -o contrib_cube.prg contrib_cube.bas

For Microsoft Windows users we suggest using UGBASIC-IDE, which allows you to download and compile this example with just one click.

Commodore 64, Commodore Executive 64

In order to compile the example, type this command on the command line:

Linux

ugbc.c64 -O prg -o contrib_cube.prg contrib_cube.bas

Windows

ugbc.c64.exe -O prg -o contrib_cube.prg contrib_cube.bas

For Microsoft Windows users we suggest using UGBASIC-IDE, which allows you to download and compile this example with just one click.

Dragon 32

In order to compile the example, type this command on the command line:

Linux

ugbc.d32 -O bin -o contrib_cube.bin contrib_cube.bas

Windows

ugbc.d32.exe -O bin -o contrib_cube.bin contrib_cube.bas

For Microsoft Windows users we suggest using UGBASIC-IDE, which allows you to download and compile this example with just one click.

Dragon 64

In order to compile the example, type this command on the command line:

Linux

ugbc.d64 -O bin -o contrib_cube.bin contrib_cube.bas

Windows

ugbc.d64.exe -O bin -o contrib_cube.bin contrib_cube.bas

For Microsoft Windows users we suggest using UGBASIC-IDE, which allows you to download and compile this example with just one click.

Olivetti Prodest PC128, Thomson MO6

In order to compile the example, type this command on the command line:

Linux

ugbc.pc128op -O k7 -o contrib_cube.k7 contrib_cube.bas

Windows

ugbc.pc128op.exe -O k7 -o contrib_cube.k7 contrib_cube.bas

For Microsoft Windows users we suggest using UGBASIC-IDE, which allows you to download and compile this example with just one click.

TRS-80 Color Computer, TRS-80 Color Computer 2

In order to compile the example, type this command on the command line:

Linux

ugbc.coco -O bin -o contrib_cube.bin contrib_cube.bas

Windows

ugbc.coco.exe -O bin -o contrib_cube.bin contrib_cube.bas

For Microsoft Windows users we suggest using UGBASIC-IDE, which allows you to download and compile this example with just one click.

TRS-80 Color Computer 3

In order to compile the example, type this command on the command line:

Linux

ugbc.coco3 -O bin -o contrib_cube.bin contrib_cube.bas

Windows

ugbc.coco3.exe -O bin -o contrib_cube.bin contrib_cube.bas

For Microsoft Windows users we suggest using UGBASIC-IDE, which allows you to download and compile this example with just one click.

Thomson TO8

In order to compile the example, type this command on the command line:

Linux

ugbc.to8 -O k7 -o contrib_cube.k7 contrib_cube.bas

Windows

ugbc.to8.exe -O k7 -o contrib_cube.k7 contrib_cube.bas

For Microsoft Windows users we suggest using UGBASIC-IDE, which allows you to download and compile this example with just one click.

ZX Spectrum +2, ZX Spectrum 128K, ZX Spectrum 48K

In order to compile the example, type this command on the command line:

Linux

ugbc.zx -O tap -o contrib_cube.tap contrib_cube.bas

Windows

ugbc.zx.exe -O tap -o contrib_cube.tap contrib_cube.bas

For Microsoft Windows users we suggest using UGBASIC-IDE, which allows you to download and compile this example with just one click.

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, open an issue for this example on GitHub.
Thank you!

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