Grasshopper

algorithmic modeling for Rhino

2 questions in one post

David

1. Is it expected behaviour that two different random components gives the same result?

I can only differentiate results by changing the seed value.

2. Im not sure if this is a bug or I am missing something essential.

I have to move a set of points in a random directions by a distance within controlled domain. I have created X and Y vectors with both positive and negative values while Vector XYZ gives only positive values - all elements go in (generally) one direction.

Is this also expected behaviour?

If so - how should I approach move in random directions?

Regards

Piotr

Views: 390

Replies to This Discussion

Permalink Reply by Michael Pryor on September 2, 2012 at 4:18pm

It is not a bug. The values are not true random they are Pseudo random. The seed is what changes them. This is so that the reslts are repeatable if needed. 

Here is how I get random vectors. I leave domain at default 0 -1 because with floating point between 0 and 1 every single possible direction is possible. Its the seeds that are important. 

Permalink Reply by Piotr on September 3, 2012 at 3:13am

Thanks Michael. It works great.

Regards

P

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