Zompist Bboard Again

Posted: **Fri Jul 03, 2026 2:47 pm**

I have created an extensible, user-friendly HTTP (mind you, not HTTPS) server for zeptoforth and, on top of it, a basic demo illustrating its use and a simple HTTP file server. While I had previously created HTTP servers for zeptoforth, they weren't easily extensible and were essentially single-purpose demos.

The source code for the HTTP server is at https://github.com/tabemann/zeptoforth/ ... _server.fs.

The source code for the HTTP file server is at https://github.com/tabemann/zeptoforth/ ... r_files.fs.

The source code for the HTTP demo is at https://github.com/tabemann/zeptoforth/ ... er_demo.fs.

And here are some screenshots:

: picocalc_http_server_dump_tasks.png (93.51 KiB) Viewed 13863 times

: picocalc_http_server_files.png (55.03 KiB) Viewed 13863 times

: picocalc_http_server_files_matrix.png (115.14 KiB) Viewed 13863 times

Posted: **Fri Jul 03, 2026 10:43 pm**

Cloudflare is going to block AI crawlers soon.
- https://www.nbcnews.com/tech/tech-news/ ... rcna352446

Posted: **Tue Jul 14, 2026 9:31 pm**

Here are a few different fractals generated with Lindenmayer systems using turtle graphics under zeptoforth.

A Gosper curve ─ the source code is at https://github.com/tabemann/zeptoforth/ ... _gosper.fs

: GOSPER.PNG (12.11 KiB) Viewed 13560 times

A Lévy C curve ─ the source code is at https://github.com/tabemann/zeptoforth/ ... e_levyc.fs

: LEVYC.PNG (10.61 KiB) Viewed 13560 times

A plant ─ the source code is at https://github.com/tabemann/zeptoforth/ ... e_plant.fs

: PLANT.PNG (12.57 KiB) Viewed 13560 times

Posted: **Tue Jul 14, 2026 11:38 pm**

Those are really pretty, Travis!

Posted: **Wed Jul 15, 2026 3:42 am**

Seconded!

Posted: **Wed Jul 15, 2026 4:09 am**

zompist wrote: ↑Tue Jul 14, 2026 11:38 pm Those are really pretty, Travis!

They are!

Posted: **Wed Jul 15, 2026 7:25 am**

Ares Land wrote: ↑Wed Jul 15, 2026 3:42 amSeconded!

Thirded! Those are really lovely!

Posted: **Wed Jul 15, 2026 8:24 am**

Thank you guys!

Posted: **Thu Jul 16, 2026 8:24 pm**

I have implemented four L-system 'bushes' from https://paulbourke.net/fractals/lsys/:

https://github.com/tabemann/zeptoforth/ ... r_bush0.fs

: BUSH0.PNG (6.78 KiB) Viewed 13475 times

https://github.com/tabemann/zeptoforth/ ... r_bush1.fs

: BUSH1.PNG (20.37 KiB) Viewed 13475 times

Posted: **Thu Jul 16, 2026 8:24 pm**

https://github.com/tabemann/zeptoforth/ ... r_bush2.fs

: BUSH2.PNG (20.19 KiB) Viewed 13475 times

https://github.com/tabemann/zeptoforth/ ... r_bush3.fs

: BUSH3.PNG (19.99 KiB) Viewed 13475 times

Posted: **Sat Jul 18, 2026 1:08 pm**

https://github.com/tabemann/zeptoforth/ ... riangle.fs

: TRIANGLE.PNG (22.23 KiB) Viewed 13421 times

https://github.com/tabemann/zeptoforth/ ... er_star.fs

: STAR.PNG (4.01 KiB) Viewed 13421 times

https://github.com/tabemann/zeptoforth/ ... owflake.fs

: QDSNWFLK.PNG (4.72 KiB) Viewed 13421 times

Posted: **Sun Jul 19, 2026 5:04 pm**

More L-systems, now of my creation! As you can tell by this point, I am on an L-system kick at the moment.

https://github.com/tabemann/zeptoforth/ ... y_bush0.fs

: MYBUSH0.PNG (26.58 KiB) Viewed 13386 times

https://github.com/tabemann/zeptoforth/ ... y_bush1.fs

: MYBUSH1.PNG (25.35 KiB) Viewed 13386 times

Posted: **Sun Jul 19, 2026 5:04 pm**

https://github.com/tabemann/zeptoforth/ ... y_bush2.fs

: MYBUSH2.PNG (11.12 KiB) Viewed 13386 times

https://github.com/tabemann/zeptoforth/ ... y_bush3.fs

: MYBUSH3.PNG (14.3 KiB) Viewed 13386 times

Posted: **Sun Jul 19, 2026 5:13 pm**

Great!

Posted: **Mon Jul 20, 2026 2:39 pm**

Niiiice!

Posted: **Tue Jul 21, 2026 10:27 am**

Here is a port of the "Quiverbloom" demo for QB64 to zeptoforth on the RP2350 for the PicoCalc. It is slow, I must admit, but it runs. The source code is at https://github.com/tabemann/zeptoforth/ ... erbloom.fs. The original code it is based off of is at https://github.com/oonap0oo/QB64-projec ... bloom2.bas.

And here are some screenshots:

: QVBLOOM0.PNG (11.92 KiB) Viewed 13304 times

: QVBLOOM1.PNG (14.54 KiB) Viewed 13304 times

: QVBLOOM2.PNG (15.22 KiB) Viewed 13304 times

Posted: **Tue Jul 21, 2026 2:07 pm**

Very beautiful! Thanks for sharing!

Posted: **Tue Jul 21, 2026 2:33 pm**

I found a neat fast floating-point square root approximation algorithm (which was used in Quake III Arena of all things), and I am going to add it to my code when I get home -- it should make it faster overall.

Posted: **Tue Jul 21, 2026 3:05 pm**

Travis B. wrote: ↑Tue Jul 21, 2026 2:33 pm I found a neat fast floating-point square root approximation algorithm (which was used in Quake III Arena of all things), and I am going to add it to my code when I get home -- it should make it faster overall.

Fast inverse square root, I think you mean. (It’s pretty famous.)

Posted: **Tue Jul 21, 2026 4:51 pm**

bradrn wrote: ↑Tue Jul 21, 2026 3:05 pm
Travis B. wrote: ↑Tue Jul 21, 2026 2:33 pm I found a neat fast floating-point square root approximation algorithm (which was used in Quake III Arena of all things), and I am going to add it to my code when I get home -- it should make it faster overall.
Fast inverse square root, I think you mean. (It’s pretty famous.)

Yes, Quake III Arena is using it for the inverse, but I'll be using it for the inverse of the inverse by doing the following:

Code: Select all

: vapproxisqrt { x -- isqrt }
  x 0.5e0 v* { x2 }
  $5F3759DF x 1 arshift - { y } \ yes, this is correct
  y 1.5e0 x2 y v* y v* v- v* \ 1st iteration of Newton-Raphson
;
: vapproxsqrt ( x -- sqrt ) dup vapproxisqrt v* ;

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