This must be a bug because its true for dividing by all odd numbers:
(i-1)/3
(i-2)/5
(i-3)/7
(i-4)/9
(i-5)/11
....
(i-n)/2n+1
And you can't make it work for even numbers
Added by Danny Boyes at 5:06pm on January 13, 2010
ards to the number before the start number...
i.e. 9, 0, 1, 2, 3, 4, 5, 6, 7, 8
then it will need to repeat this pattern (continuing to count upwards) and the repeat number is based on a slider (for example 3 in the case illustrated below):
9, 0, 1, 2, 3, 4, 5, 6, 7, 8
19, 10, 11, 12, 13, 14, 15, 16, 17, 18,
29, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29,
if anyone has any ideas on how to create this series it would be great
M.…
Loop'. The fun part of the slower version is that you can see what it's doing while it's running. 'Fast Loop' gives no indication that it's working, so you want to test it with small numbers and be sure it's coded properly before bumping the iteration count up.
The GH profiler running the slow version showed between 1 and 1.5 seconds per loop, but the reality was more like ~10 seconds per loop toward the end of an 11 X 11 grid, or ~20 minutes total. It's easier to be patient because you know it's working.
The 'Fast Loop' finished the same grid in 1.6 minutes! An impressive improvement. I've been running it on a 30 X 30 grid (900 points) for ~23 minutes so far and see nothing yet. Not the ~12 minutes I had hoped for... Now 36 minutes on this loop for 900 points... hope it's not stuck. Not fast! Later - DONE!! Profiler says 59 minutes for 900 points but it was more like an hour and twenty minutes total. It succeeded, I have a single 'Closed Brep' from 900 extruded rings, baked to Rhino.
Another strategy to explore would be doing 'SUnion' on a smaller grid using the Anemone loop, then replicate it by moving it as needed to form a larger grid; then run the copies through another 'SUnion' loop. I went ahead and implemented that while waiting. It works and is fast! Started with 3 X 3 and ran the result again as 5 X 5 (9 X 25 = 225 total) in barely ~70 seconds!? Trying 36 X 36 now... 1,296 points appears to have succeeded in less than ten minutes! Though it seems to take quite awhile after the loop ends before control is restored to GH/Rhino. I'll let you do your own experiments and benchmarks.
I encapsulated the loop in a cluster called 'suLoop' (blue groups).
Internal of 'suLoop' cluster:
…
Added by Joseph Oster at 11:14pm on March 22, 2017