Export geometry out of model container

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

Answer 1

[Ravi Kumar]

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)

[MarionJ]

Thank you Kumar!!

Answer 2

[Alan Weiss]

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

[MarionJ]

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.