The Sinclair QL Forum

Hi folks,
played a bit more with fractals over the weekend. If any of you has got one of those red/blue 3d glasses, you can play with the Lorenz attractor. Source is here: https://bitbucket.org/mrzap000/lorenz/src/master/
Pretty basic, not smooth, didn't have time to find some smarter way to animate, but kind of oddly satisfying. 3d is super simplified, eyes converge more or less on the Y (vertical) cartesian axis, hence the rotating Lorenz attractor will alternatively pop in and out of the screen.
Tried to put some code to possibly make it run on a Standard QL (if VER$ not "HBA" then it *should* work - those with a QL or a working QL emulator could possibly test and suggest how to fix if it doesn't work).
Enjoy...

Hi Mrzap000,

Your program works fine on my SuperGoldcard QL under SMSQ/E.

But under QDOS, three lines need changing :
170 REMark PI=4*ATAN(1) , wil avoid the name-table clash !
370 & 530 change FOR i% to FOR ii , as QDOS does not accept integer for loops....
Then all is ok.

Regards, Steve.
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stevepoole wrote: Mon Mar 27, 2023 12:42 pm 170 REMark PI=4*ATAN(1) , wil avoid the name-table clash !
370 & 530 change FOR i% to FOR ii , as QDOS does not accept integer for loops....

Thanks Steve, I couldn't remember if PI needed definition on a QL or not.. and thanks for the note on integer loops.
Fill fix that and update the repo.