pyro How to acces vector fields in a volume? (temp,rest,vel)

[SteveNi]

Hi.

So I have a volume from a pyro sim, wich has various vector fields like temperature, density, rest field..etc

How can I acces these vector values in a volume wrangle, so I can do per-voxel suff with them?

They are not attributes so I cant simply write @temp, @rest....

Can someone explain me also why those vector fields are represented as primitives in the volume object?

 

[dimovfx]

you can access them just like attributes, f@density or v@vel in volume wrangle is the right way.

[SteveNi]

Oh ok, I noticed there was an error in my code....my bad

I also have another issue tho..

Always in a volume wrangle, if I want to print out the @resx @resy or @resz attributes, and I use the following code:

printf("%s \n", @resx);

I just prints out 0, and to get it to work I have to write: (found it ina old post)

printf("%s \n", @resx, @density);

Can you explain me why?

[dimovfx]

Not quite sure, perhaps @resx does not actually exist as primitive and does not evaluate at all.

if you try:

@density = @density
printf("%d \n", @resx);

it does seems to work.

[SteveNi]

Thanks.

We should ask to some volume experts or some dude frome SideFx why you have to write

@density = @density