control @active through time with wrangle

[dmv096]

Hi, this is a basic question but I have spent hours and didn't see the answer anywhere.

I have some geo packed and ready for a rigidbody simulation, but i want to cotrol when the geo start to simulate.

So I put a wrangle node to control it, for example: I want to start in the third frame:

i@active=0;

if ($F>3){
i@active=1;

}

But in the Dopnet, it never starts. In the spreadsheet active keeps 0 and never changes to 1. I tried to put the wrangle in a solver (because it worked for me with working with attribute transfers stuff) but it didn't work either.

I did a simple scene with the problem. 

P.S. I know I can change the frame of the start of the sim but actually i would like to have diferents objects with differents starts so I though @active is the way.

Thanks in advance

active_update_question.hip

 

[ikoon]

Hi Davis, you had a wrong syntax in your "set_active" wrangle 

I commented your line and added a right one:

i@active=0;

// if ($F>3){ 
if (@Frame>3){
i@active=1;

}

 

[dmv096]

3 minutes ago, ikoon said:

Hi Davis, you had a wrong syntax in your "set_active" wrangle 

I commented your line and added a right one:

i@active=0;

// if ($F>3){ 
if (@Frame>3){
i@active=1;

}

 

Oh, that was it!
Now it works elegantly.
The variables and attributes are going to kill my health.
Thanks a lot, I owe you one.

[ikoon]

Well you are right, that it looks like it should work ... but it doesn't  maybe it is a bug and your syntax is ok?

Btw you can evaluate the parm by middle clicking on its name (VEXpression), the parm is then in dotted line:

[dmv096]

18 minutes ago, ikoon said:

Well you are right, that it looks like it should work ... but it doesn't  maybe it is a bug and your syntax is ok?

Btw you can evaluate the parm by middle clicking on its name (VEXpression), the parm is then in dotted line:

Ohh nice tip!

Well from now on I will use @Frame instead of $F in cases similar to this one and I will save myself headaches.

Thanks again!