Control falloff geometry node setup

Question

Follow-up of this question How would I be able to control the falloff of a node setup like this?

Currently, This does this:

I want to be able to control the falloff of a thing like this. how would I be able to do this? Thanks!

Answer 1

To obtain a falloff, you need some function of distance from Falloff Center, which is 1 when the distance is 0, and 0 when the distance is Falloff Radius. A Map Range node can do this for you, and clamp its output to 0 for anything beyond the radius.

Above..

• The vector from the controlling Empty (the falloff center) to the vertex position, is stashed as e->p
• The distance between them, as p<->e
• and the range of that distance 0 -> Falloff Radius is mapped to 1 -> 0

The effect that's being faded, here, is the movement of vertices away from the Empty (i.e. movement along e->p). Now we have a 0 -> 1 falloff, we can multiply that vector by a scale of the falloff, and add it to the position...

Above, Falloff is also raised to a power, to provide some option in falloff's curve. You could get more control by using an Attribute Curve Map node instead of the Power, but I haven't found a way to present that curve to the user in the GN modifier.

This gif shows change in Radius.

This one, Power, and Scale.