Jump to content
H2O

VEXpression Problem

Recommended Posts

Hi everyone,

 

I have a big issue about exporting data from vexpression context.

 

I used vexpression to set the velblend parameter in the "popadvectbyvolume" node. So I can advect particles differently along time.

But I'm not sure what result number I have, so I want to export this value to check it out in the geometrie spreadsheet.

 

I found this line in Houdini Help: export float @mytest = 0;

 

So here is my code:

 

#use a parameter to set the velblend

velblend = @activate;

 

#use a count to set the velblend differently when I want to
if(@count >= 3) { velblend = 1/((@count/3)*5); }

 

#want to export the final result to debug
export float @velblend;

 

 

My popnetwork works fine (my particles get different vel along time) and I don't have any error.

But when I check the velblend attribut in spreadsheet, it stay to 0.0

 

 

So I tried different syntax like:

 

export float @debug = velblend;

export float @debug = @velblend;

export float @parm_velblend;

 

But each time I had an error : "velblend" is not a valid default for this prototype...

 

 

 

I'm getting crazy right now!! :wacko:

If someone could have an idea, it could be great! :D

 

Thx a lot.

 

Cheers

Share this post


Link to post
Share on other sites

you need to initialize export variable to constant value, it can't be another variable

and then later you can assign a varying value to it

export float @velblend = 0;

velblend = @activate;
if(@count >= 3) { velblend = 1/((@count/3)*5); }

@velblend = velblend;

in a cleaner example:

export float @debug = 0;

f@debug = rand(@id);
Edited by anim

Share this post


Link to post
Share on other sites

Greaaat!!!

 

It works perfectly :D :D

 

Thx a lot anim!

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

×