create unique id on changing ptnum points VEX

[WLVL]

Hello everyone,

 

I have several different pop sim, merged in sop.   

since the pop id starts at zero for each sim, i have multiple points with same id values.

i need a unique id.

 

i'd like to create a name attribute based on the "stream group + id".

 

how would i do this with vex?

i am missing how to get the name of the group the point belongs to

s@name= itoa(@id)+"how do i get my group name here?";

Thank you in advance!

 

 

 

PS. one way i did it was to drop an attr create, shift the id value by a big number (i.e. $ID+500000), different for each stream, but this is not very pratical

 

 

PS. the nameSOP does get the group name somehow but it's not possibile to unlock its content to see how

Edited February 15, 2016 by WLVL

[WLVL]

Ok i just answered myself

 

drop a nameSOP, name from group

 

drop a att wrangle

s@name= s@name_grp+"_"+itoa(@id);

done.

 

 

I am still interested in the VEX function that would replace that nameSOP, thanks!

[f1480187]

As the first step:

string pointgroups[] = detailintrinsic(0, "pointgroups");
s@name = pointgroups[0] + "_" + itoa(@id);

It will take first point's group in alphabetical order. Name SOP chooses group differently, probably the last group in the order they was created. It's probably impossible to recreate such behavior inside VEX and completely replace Name SOP in such corner cases.

[WLVL]

thank you very much!!