yade-users team mailing list archive

[Václav Šmilauer <eudoxos@xxxxxxxx>]

chiara modenese píše v Pá 23. 07. 2010 v 12:31 +0100:
> Hi!
> 
> could you please add a couple of words on the use of stressMask in
> PTC? What is the value that stressMask should assume depending on the
> case? It is not very clear reading documentation.
You can have a look at
https://yade-dem.org/sphinx/yade.wrapper.html#yade.wrapper.Peri3dController.stressMask which is better documented, but has 6 components (rather than just 3 as in PTC).

Basically, you do bitwise addition of what you components where you want
stress-control, taking

x: 000001
y: 000010
z: 000100

So for x+z you get 1+4=5. (100 in binary is 4 decimal). You can also
write it using 0,1,2 indices for x,y,z and using bitshift operator:

(1<<0)+(1<<2)=5 (try it in python).

Finally, python lets you write binary directly with the 0b prefix:

0b001+0b100
5

HTH, Vaclav