Circles Tutorial

Anything Sinclair ZX Basic related; history, development, tips - differences between BASIC on the ZX80 and ZX81
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GCHarder
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Circles Tutorial

Post by GCHarder »

From Compute! July 1983.

BASIC tutorial to draw circles, not mentioned in the article but it's quite easy to modify to draw squares and diamonds as well.

I've included a standard, WRX and Pseudo-Res versions.

Regards;

Greg
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XavSnap
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Re: Circles Tutorial

Post by XavSnap »

Cool !

Thanks Greg.
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Crayon21
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Re: Circles Tutorial

Post by Crayon21 »

I'm trying to draw XANA from code lyoko. What values should I use?
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SafePit
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Re: Circles Tutorial

Post by SafePit »

Great find! I decided to take the BASIC and convert it to z80 assembly. The routine is super fast, so I turned it into a screen saver of sorts. Even has Chroma support. Love these kinds of challenges.
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David G
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Re: Circles Tutorial

Post by David G »

Is that an Atari 800 font in the PSI version? So cool
GCHarder wrote: Fri Oct 30, 2020 9:42 pm From Compute! July 1983.

BASIC tutorial to draw circles, not mentioned in the article but it's quite easy to modify to draw squares and diamonds as well.

I've included a standard, WRX and Pseudo-Res versions.
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GCHarder
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Re: Circles Tutorial

Post by GCHarder »

That is a custom font developed by Paul Farrow specifically for PSI-Res applications. See his "Celebration"' demo.
Greg
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