Expression to drive attribute using other attribute with VEX or Python

[apaza610]

Hello, one question please:

What expression can I write to use the @ptnum attribute to drive the @P.y attribute using VEX or Python expressions.

What if I want to drive @P.y with @P.x  ??

thanks in advance.......

[3dome]

use a point wrangle
@P.y = @ptnum;
@P.z = @P.y;
 

[apaza610]

4 hours ago, 3dome said:

use a point wrangle
@P.y = @ptnum;
@P.z = @P.y;
 

If possible I would like to use an expression, not the wrangle node, unless there's really no other way........

[dedeks3000]

Try the attribute SOP node, for more details look at this video (seen last week so ...) :

 

[3dome]

attrib sop is VEX aswell

i dont think you can do it with an expression in transform sop because it does not run over each point like a wrangle but over the whole geometry at once.

[apaza610]

2 hours ago, 3dome said:

attrib sop is VEX aswell

i dont think you can do it with an expression in transform sop because it does not run over each point like a wrangle but over the whole geometry at once.

Now I understand what was I wrong with, thanks Dominik  and dedeks3000 ........