Extracting information from 3D model - .stl file management on matlab

Hi everyone

I started reading a .stl file, I alredy know how to calculate volumen and superficial area from it, but I need to extract even more info, cause it will be input data for a convutional NN. So, I need to extract data as, minimun distance between surfaces, minimum radius, maximum distance between surfaces, and so on. To do so, I used triangulation, and with some features, I was able to obtain the normal vector of the surfaces, also the X,Y,Z coordinates fo the center of each triangle, I thought that I will be able to find the minimun distance and maximum, using norm(b-a), to find all distances between trangle centers, but did not came out I as expected. This is the code that I made for this. I will appreciate any help or idea to achieve this goal, thanks

TR = triangulation(fv.ConnectivityList,fv.Points)
E = edges(TR)
startVert = TR.Points(1,:);
endVert = TR.Points([2 3 5],:);

F = faceNormal(TR)
P = incenter(TR)

for i = 1:size(P,1);
    a = P(i,:);
    b = P((i+1),:);
    d = norm(b-a);
    dis(i) = d;
    dis;
end

Min_dis = min(dis);
Min_dis

[darova]

Can you show the geometry?

[Juan Pablo Guamn Bernal]

Yes, this is an image of the part, but I will need to do the same process with random geometries.

Answer 1

[darova]

Try this link: Surface Curvature

Can you just analyze edge length to find minimum/maximum distances?

[Juan Pablo Guamn Bernal]

great idea, thaks, I will try it and let you know if it works