Hi I'm trying to simulate a simple wind environment with Popwind,
the pop works fine with any number input for velocity,

but when I tried to multiply it with local variables like $NX and $NZ
I didn't get the result I was hoping for.

Please help me if there something I was missing.

thanks in advance :]

for someone who may have the same question
the solution is to check the Use VEX and then simply type in "wind = @N"

seriously some of the parameters are so ambiguous for accessing them,
if you try to copy & paste the relative parameters like Wind Velocity and Air Resistance,
you'll only get the value instead of the reference.

https://www.sidefx.com/docs/houdini/nodes/dop/popwind.html [www.sidefx.com]

even if it's difficult to maintain and provide the samples of the usage for each nodes,
the documents could at least shows up all the local variables name.