Write To A Parameter Using VEX?

[Atom]

HI All,

I know how to read a parameter using vex via the ch("my_parameter) function.
How do I write a result back to that parameter inside a vex snippet?

For instance this does seem to be valid vex code, it does not throw an error but it also does not work.

ch("my_parameter") = 1;

Edited September 13, 2015 by Atom

[anim]

you can't write to a parameter with VEX at the moment

you would have to store your value in attribute and then reference it in parameter using detail(), prim(), point() or vertex() expression

[Atom]

What is actually odd is that I just watched Peter Quint do this in his latest crowd tutorial video. He was updating the existing force value with a *= not a direct assign. However, when I tried to do this with a parameter that I had added to the interface, as you mention, it does not work.

[Guest mantragora]

If you look inside of popSteerWanderDOP => noise_force => local_noise, you will see that there is a snippetVOP with expression referencing VexPression field. The force value is modified after it's set in UI.