Quasi random numbers

Replies to This Discussion

Permalink Reply by David Rutten on December 9, 2014 at 10:52am

The Populate2D component outputs distributed values. But it's 2D only. There's also a Populate3D but no Populate1D. If you want random numbers that are well spaced along the numberline, there are some approaches you can take:

1. Generate equally spaced numbers (Series or Range components), then pertubate each number using a random amount.
2. Recursively subdivide a numeric domain into smaller domains, taking care never to split a domain too close near the ends. By always subdividing the longest domain first, instead of subdividing all domains equally often, you can get to an exact number count.

Permalink Reply by AB on December 9, 2014 at 11:04am

Here is an example of just the regular Populate2d, and also a chunk of a example given here by David Stasiuk... There is a slider where you can control the range of movement out of the starting grid. this example doesn't account for what David Rutten refers to in 2. above. Maybe if I have time later I will try that out.

There is also a overview of the current Random generator issues in GH found here

Attachments:

• Random Points Strategies-ab.gh, 18 KB

Permalink Reply by David Rutten on December 9, 2014 at 11:17am

Here's a c# script doing what's explained in bullet item #2.

A third approach is to generate a random sequence, then smooth it out.

Attachments:

• random domains.gh, 12 KB

Permalink Reply by David Rutten on December 9, 2014 at 11:20am

And that third approach can be done with Blur Numbers

Attachments:

• blur numbers.gh, 5 KB

Permalink Reply by Alex Mc on December 21, 2014 at 8:06pm

Hi David and AB

Thanks so much for all the responses, apologies for getting back so slowly

I'll let you know how it goes!

Alex

Permalink Reply by Amin Bahrami on December 22, 2014 at 4:04am

for distributing numbers in a domain I prefer to use another method instead of blurring number, because in blurring number we need iteration in to approach a more equal division set , we just need to get progressive addition of set of random number and remap it to assumed interval, that i can share its code if you want but now embed this code in Careless-range component as I decried Here  ;

but in case of point generating there are a lots of methods for different purposes.

the image bellow show three different way to approach different random points.

and the result would be like this :

Attachments:

• random points.gh, 11 KB

Permalink Reply by Amin Bahrami on December 22, 2014 at 6:28am

I try to explain the logic of Careless-range code by definition

Permalink Reply by Shridhar Mamidalaa on January 5, 2015 at 5:03am

Here are few ways 2 control density. which will also show up as attractors in case of voronoi and Quadtree.

Permalink Reply by Shridhar Mamidalaa on January 5, 2015 at 5:04am

Permalink Reply by Shridhar Mamidalaa on January 5, 2015 at 5:11am