OTHER CONTRIBUTIONS: 3D ROTATING CUBE (2)

This small example shows how a rotating cube can be drawn in BASIC on various 8-bit home computers, using the same source. A little optimization has been done on clearing only the bitmap occupied by the cube.

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SOURCE CODE ()

	BITMAP ENABLE(16) : CLS BLACK
	DIM t AS SIGNED BYTE : DIM z AS SIGNED BYTE
	DIM p AS SIGNED BYTE(5), q AS SIGNED BYTE(5), x AS SIGNED BYTE(5), y AS SIGNED BYTE(5)
	DIM a AS SIGNED BYTE = 20: DIM b AS SIGNED BYTE = 20: DIM c AS SIGNED BYTE = 70
	DIM d AS SIGNED BYTE = 45: DIM e AS SIGNED BYTE: DIM f AS SIGNED BYTE
	f=(b^2)/(a^2) : e=c
	bg := NEW IMAGE(64,72)
	GET IMAGE bg FROM 0,0
	FOR z=1 TO a STEP 2
		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
		PUT IMAGE bg AT 32, 24
		FOR t=1 TO 4
			u = (t AND 3) : INC u
			xt=x(t) : xu=x(u) : yt=y(t) : yu=y(u)
			x1=xt+c : y1=yt+d : x2=xu+c : y2=yu+d
			LINE x1,y1 TO x2,y2,WHITE
			x2=xt+c : y2=yt+e
			LINE x1,y1 TO x2,y2,WHITE
			y1=yt+e : x2=xu+c :	y2=yu+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_cube2.dsk contrib_cube2.bas

Windows

ugbc.cpc.exe -O dsk -o contrib_cube2.dsk contrib_cube2.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_cube2.xex contrib_cube2.bas

Windows

ugbc.atarixl.exe -O xex -o contrib_cube2.xex contrib_cube2.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_cube2.xex contrib_cube2.bas

Windows

ugbc.atari.exe -O xex -o contrib_cube2.xex contrib_cube2.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_cube2.prg contrib_cube2.bas

Windows

ugbc.c128.exe -O prg -o contrib_cube2.prg contrib_cube2.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_cube2.prg contrib_cube2.bas

Windows

ugbc.c64.exe -O prg -o contrib_cube2.prg contrib_cube2.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_cube2.bin contrib_cube2.bas

Windows

ugbc.d32.exe -O bin -o contrib_cube2.bin contrib_cube2.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_cube2.bin contrib_cube2.bas

Windows

ugbc.d64.exe -O bin -o contrib_cube2.bin contrib_cube2.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_cube2.k7 contrib_cube2.bas

Windows

ugbc.pc128op.exe -O k7 -o contrib_cube2.k7 contrib_cube2.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_cube2.bin contrib_cube2.bas

Windows

ugbc.coco.exe -O bin -o contrib_cube2.bin contrib_cube2.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_cube2.bin contrib_cube2.bas

Windows

ugbc.coco3.exe -O bin -o contrib_cube2.bin contrib_cube2.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_cube2.tap contrib_cube2.bas

Windows

ugbc.zx.exe -O tap -o contrib_cube2.tap contrib_cube2.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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