Rendered and animated by a BBC BASIC program, this illustrates how a regular heptagon can be dissected into eight pieces, which can then be re-arranged into a larger heptagon - but with a heptagonal hole in the middle! bbcbasic.co.uk/bbcsdl/#bbcbasic
David Williams's digital Christmas card from 2021, I think it was one of the last complete BBC BASIC programs he wrote before 'retiring'; an amazing talent, much missed. You can run it in your own browser at this link: wasm.bbcbasic.net/bbcsdl.htm…#bbcbasic
3D Christmas Bauble animated by 'BBC BASIC for SDL 2.0'. The music, also played by BBC BASIC, is 'Prepare Thyself, Zion' from J.S.Bach's Christmas Oratorio; it was transcribed for Z80 Music by Gerald Pye on 27th September 1981. bbcbasic.co.uk/bbcsdl/#bbcbasic
I managed finally to convert an earlier version of our art program in BBC basic for windows to BBC basic for sdl. This means I can now paint on my ipad. Took a few days and used a.i for button help. This was painted very naturally with my finger just now on the iPad. #bbcbasic
I've updated BBC BASIC for SDL 2.0, the cross-platform programming language for Windows, MacOS, Linux, Android, iOS and in-browser, to v1.40a. It comes with the program 'vampire' to draw this aperiodic monotile tessellation (with no reflections!) bbcbasic.co.uk/bbcsdl/#bbcbasic
Tumbling Torus (BBC BASIC, based on an original program by David Williams). You can also run it in your browser here: wasm.bbcbasic.net/bbcsdl.htm…#bbcbasic