Sine wave shader difficulties

[neon dome]

Hi I created this sine wave shader for the trees in my current project, Id like the base of the trees to ideally stay still. I know one way to do this is through editing the bounds of the object or shader and I'm not entirely sure of how to do that however and have heard it can be quite complicated. If anyone has any suggestions that would be great!

[brave cradle]

Fundamentally you just multiply the strength of the sway by a range that represents the tree's verticality

That range could be calculated from vertical position in world space or in objects space, or from the object bounds, or baked into the mesh geometry in vertex color or UV channel for example

[neon dome]

totally did it wrong but this looks funny lol

[neon dome]

How would I represent the range in the Shader Graph? What I initially did was create a float variable for the Y value of the mesh in the scene then multiply that by the strength like this.

[brave cradle]

Your verticality multiplier has to be sourced from a variable that changes over vertical distance, such as the ones I listed
Properties are per material so they're always the same value regardless of where positionally you read the value

I guess the simplest is to use Position node in object space, and Remap the Y value so the lowest and highest vertical positions you want for the sway map to 0 and 1
May want to Clamp it also

Bounds method may offer more flexibility if you have different sizes of trees using the same shader

[neon dome]

this is what i ended up trying, along with several other things without the correct effect. Is there anything specific here I might have done wrong or I might have interpreted your suggestion wrong? Thank you for the help

[brave cradle]

Yes, Clamp node has wrong input

And you don't want to Add the position range into your vertex deformation, but multiply the deformation by it