Export geometry out of model container

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MarionJ 2018-4-19

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评论： MarionJ 2018-4-20

Hello

I want to export the 3D-geometry out of my model container.

I have imported a 3D-geometry from a stl-file. Now I am interested in the coordinates of the vertices. But the gd only tells me the number of cells, faces, edges and vertices. Matlab clearly has the information. There must be a possibility to extract them.

In 2D gd is a matrix not a struct and the matrix has the x-y-coordinates.

Thanks in advance for any help.

MJ

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Answer 1

Ravi Kumar 2018-4-19

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在 MATLAB Online 中打开

You can get this information easily in the latest version of MATLAB, which is R2018a. The function you need to use is findNodes.

Here is a simple example with block as geometry:

model = createpde;
gm = importGeometry(model,'Block.stl')
msh  = generateMesh(model);
vertexNodes = findNodes(msh,'region','Vertex',1:gm.NumVertices);
vertexCoordinates = msh.Nodes(:,vertexNodes)

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MarionJ 2018-4-20

Thank you Kumar!!

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Answer 2

Alan Weiss 2018-4-19

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Your PDEModel object has a Mesh property that is a FEMesh object. In that object you can see the mesh nodes (what you call the vertices).

Alan Weiss

MATLAB mathematical toolbox documentation

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MarionJ 2018-4-19

I know, but I do not want the mesh nodes, only the Corners of my geometry. For example if I have two cuboids, one on top of the other, I wish to have the coordinates of the eight Corners/vertices of this geometry. In 2D the Information is in the gd Matrix. The gd Matrix has no mesh Information in it.

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