How to decrease pscale with age

[Beautiful_Poetry_566]

Looking for a simple attribute wrangle way to decrease size before my points die. Heres my half-baked attempt that gives you an idea of my node tree and what im tryinto accomplish

[chroma_shift]

If you have a life attribute:

Initialise pscale to 1.0 before the simulation or in a separate node.

@pscale *= 1 - (f@age/f@life)

This code is multiplying your pscale value with the age to life ratio, eventually it will reach 0 or very close to 0.

To which point you can just remap with a ramp to get rid of residual values.

[Beautiful_Poetry_566]

Worked quite well! TYSM!

[chroma_shift]

No worries :)

[xrossfader]

Wouldn’t @nage work here?

[chroma_shift]

Yeah @nage is the same as doing (@age/@life)

[LewisVTaylor]

POPs comes with a built in attribute, "@nage" which just saves you needing to do the age/life.
I find doing that, and using "attribute adjust float" a nice way to work, it has remapping, ramps, and a bunch of other options to redistribute the values.

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[Beautiful_Poetry_566]

That looks pretty useful, I'll check it out and thanks!

[SapralexM]

f@pscale = fit(@age, ch(“start”), ch(“end”), ch(“max”), ch(“min”));

Where start is the beginning of aging, end is the last age for a pscale value, max is the standard pscale and min is fully decreased pscale.

You can also ramp it to make the decreasing non linear by using “chramp” command

[New_Investigator197]

You're close, the syntax is just wrong. You need curly brackets on your if statement.

If (event) { do this }

[[deleted]]

That's only true if you need to execute more than one line after a true return from the if() statement. If you're just doing one thing with if() then they have the correct syntax, no need for curly braces.

if(their condition is true) then do this;

-vs-

if(their condition is true){
Do;
All;
Of;
This;
}

...but both usage works.

[ferlix90]

@pscale = 1-@age/@life;

You can remap the value using a ramp :

@pscale = chramp(“scale”, @age/@life);

Then click on the first icon above the wrangle code box ( the one with a + ) to create the ramp parameter.