Density driven by velocity

[ibaniser]

Hi guys I am making a simple smoke sim whereby I need the density of the smoke to be controlled by velocity.

I have car wheels that move from a stop position and am needing the dust to grow in density as it moves. Can I do this through a wrangle SOP or is it more complex?

Cheers!

[bunker]

yep a wrangle would do, if you have your velocity as a volume:
@density = fit(length(v@vel),0,chf("maxvel"),0,1);