Wrangle: Colour from velocity, mapped to Ramp

[Nicholas Yiallouris]

I'm trying to colour a sim after the fact.

 

I've copied some boxes to my fluid sim and added a trail to get the velocity back.

 

So now I'm trying to colour the boxes based on the newly computed velocity but I'm going back and forward with the point wrangle.

I've created a colour ramp in my wrangle interface and tried to access the gradient via a "chramp" but the wrangle doesn't want to play nice.

Does anyone know how to colour based on velocity inside the point wrangle?

 

[anim]

what do you mean doesn't play nice? wrangle always plays nice

 

so let's assume you have color ramp parameter named "color_ramp"

and to make it more flexible add 2 float parameters, "min_speed" and "max_speed"

then your code will be something like:

float speed = fit(length(v), ch("min_speed"), ch("max_speed"), 0, 1);
@Cd = chramp("color_ramp", speed);

[Nicholas Yiallouris]

Thanks Tomas !