VEXpression Problem

[H2O]

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!!

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

 

Thx a lot.

 

Cheers

[anim]

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 May 19, 2015 by anim

[H2O]

Greaaat!!!

 

It works perfectly :D

 

Thx a lot anim!