[Bf-committers] [Bf-blender-cvs] SVN commit: /data/svn/bf-blender [32998] branches/particles-2010/source/ blender/nodes/intern: Replaced the use of BLI random functions in the " Random" node by a straightforward pseudo-random number generation based on randomized arrays .

[Kent Mein]

On Nov 11, 2010, at 3:19 AM, Lukas Toenne wrote:

> Revision: 32998
>          http://projects.blender.org/plugins/scmsvn/viewcvs.php?view=rev&root=bf-blender&revision=32998
> Author:   lukastoenne
> Date:     2010-11-11 10:19:06 +0100 (Thu, 11 Nov 2010)
> 
> Log Message:
> -----------
> Replaced the use of BLI random functions in the "Random" node by a straightforward pseudo-random number generation based on randomized arrays. This is a thread-safe implementation (the arrays are constant), the disadvantage is that the static arrays (one for ints, one for floats) are rather large (65536 entries) and still have a much shorter period than "real" RNGs. An alternative would be using a separate RNG for each thread, but that requires passing thread info to kernel functions.
> 

Wouldn't having different RNG's per thread be bad for animation?
You would get different results depending on the order of your "parts" rendered.

Kent