Create/Export .stl file from a mesh

Question

Askic V 2022-9-15

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1805935-create-export-stl-file-from-a-mesh

回答： Cris LaPierre 2022-9-15

采纳的回答： Cris LaPierre

在 MATLAB Online 中打开

Hello,

I have created a model and used generateMesh function that created a mesh and stored it to a model object.

smodel = createpde('structural', 'static-solid');
importGeometry(smodel, 'SquareBeam.STL');
msh = generateMesh(smodel, 'GeometricOrder','linear','Hmin',50);
pdemesh(msh);

Now, I'd like to write this structure to a stl file. I have found stlWrite function in the File Exchange but this function takes faces and vertices as input parameters.

https://www.mathworks.com/matlabcentral/fileexchange/20922-stlwrite-write-ascii-or-binary-stl-files

Is there any way I can extract this data from msh object created in the code above?

Thank you.

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Answer 1

Cris LaPierre 2022-9-15

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1805935-create-export-stl-file-from-a-mesh#answer_1054310

在 MATLAB Online 中打开

You can use the stlwrite function that ships with MATLAB. However, you do need to turn your mesh into a triangulation opject first. I'm not sure I found the best way to do this, but my solution is based on this answer:

https://www.mathworks.com/matlabcentral/answers/473495-stlwrite-error-tetrahedron-triangulation-is-not-supported

smodel = createpde('structural', 'static-solid');

importGeometry(smodel, 'SquareBeam.stl');

pdegplot(smodel)

msh = generateMesh(smodel, 'GeometricOrder','linear','Hmin',50);

pdemesh(msh)

% Extract the edge nodes

N = findNodes(msh,"region","Edge",1:smodel.Geometry.NumEdges);

% Convert to alphashape

shp = alphaShape(msh.Nodes(:,N)');

figure

plot(shp)