Scale by normal direction until find geometry center

[josich]

Hi,

I'm pretty sure that is an already solved question but I can't find the solution.

The idea is to scale a random geometry each point by his normal until a minimum value that would be the center of the shape ( similar to the Straight_Skeleton_3D node does).

The idea is to be able to shrink a geomity until a minimum point without generating crossed geometres. Similar to an erosion. I would like to store the min value and use it later in a shader to animate it.

Any idea?

Thanks

Oscar

Edited May 28, 2024 by josich

[konstantin magnus]

Hi Oscar,

you can displace a mesh along the volume gradient of its signed distance field. I also visualized the straight skeleton using volume convolve.

 

straight_skeleton.hipnc

[josich]

Hi Konstantin,

Many thanks for the answer. That approach sounds interesting I-m gonna take a look.

For my side I tried with Labs Skeleton 3d and then XYZDist to find the closes position of the mesh on the skeleton curves. The result is quite acceptable too.

[hannes603]

labs streight skeleton 3d