I have some imported stl objects in my scene. They are looking quite different, but for example i will talk about the orange one in this example https://threejs.org/examples/?q=stl#webgl_loader_stl.
At the moment im able to click on the object with the mouse, object gets selected and i can do whatever i want. Now i want to click on the object and select only a part/area of the object f.e. in case of the orange object i click on the gap of the disk and i want to highlight that. (I want/need the positions of the gaps vertices)
i learned from @prisoner849 and @sonali_funde1 on this topic a lot How to find wall thickness of 3d models (STL) files?
The idea is: go through the geometry.attributes.positions and get somehow the correct surface.
Im not sure, how this surface looks like (how many vertices) and compute a sphere or mesh around it and make it visible.
I’m a bit stuck because for me it’s a very complex issue and maybe somebody can push me in the right direction.
Very interesting for solving the problem are the posts: #2 #15 #21