SDF Custom 3D Mesh?

[enzyme69]

Is there a plan to add ability to import 3D mesh as custom starting volume for SDF?

[thegnarwhals]

You might find this handy: https://github.com/marian42/mesh_to_sdf
Once you have your sdf as a numpy array you can create a lookup function and decorate it with sdf.sdf3

[tjusxh]

@thegnarwhals I have a complicated numpy array sdf from mesh_to_sdf. How to translate to sdf.sdf3?

[thegnarwhals]

@tjusxh hi, you will need to create a function that takes in the coordinates and returns the SDF value, and then decorate it with @sdf.sdf3. I’m on my phone right now but let me know if you’re still having trouble tomorrow and I can try point you to some examples when I’m back at my desk. If you look through the source code you should be able to find some examples, for example the sphere.

[thegnarwhals]

@tjusxh you may need to implement some tri-linear interpolation in your function.

[emilche]

I am quite stuck on this one as well.
Do you have any pointers in how you would interpolate the outcome. cause it just complains on me that my size of the sdf from the mesh is to big compared to the one that is already there.

[VladStojDev]

Hi,

Could you please provide a minimal working example how to load a SDF that is generated from a mesh using the mesh_to_sdf library? I am currently trying to do this, but I don't know how to parse the generated numpy array with SDF values and create a new SDF3 object that I can further manipulate.

Any help would be much appreciated!

[rawwerks]

(this repo is so cool!)

+1 for an example of loading a mesh.

the closest i found is this repo, which can use SDF on a STL mesh to create a "TPMS scaffold" => https://github.com/nodtem66/Scaffolder

[rawwerks]

@enzyme69 - i also found these, some are new since your question. sharing the references now because i probably won't have time to try any of these until after the holidays:

• https://pypi.org/project/mesh-to-sdf/
• https://pypi.org/project/pysdf/
• http://www2.imm.dtu.dk/pubdb/edoc/imm1289.pdf
• https://github.com/heap-chist-era/stl2sdf