MATLAB: How to access to the vertices and facets of each face detected using importGeometry (PDE toolbox)

importgeometrypdepde toolboxpdegplotstl

Using importGeometry and pdegplot (PDE toolbox),

N = 3;
model = createpde(N);
importGeometry(model,'BracketWithHole.stl');
pdegplot(model,'FaceLabels','on')

the geometry is decomposed into different faces as shown in the picture. How to access to the vertices and the facets (triangles of the mesh) of each labeled face ?

Best Answer

Hello,

I was able to associate nodes to faces thanks to this answer:

https://it.mathworks.com/matlabcentral/answers/310479-how-to-assign-nodes-to-faces-of-a-3d-tetrahedral-mesh-pdetool?s_tid=srchtitle

Thank you for your time.

Gaetano

Related Solutions

MATLAB: Create tetrahedral mesh out of figure

Assuming you are trying to use PDE Toolbox, you can use the multicylinder function to create cylinder geometry and mesh as shown below.

R = 0.1;
H = 0.5;
gm = multicylinder(R,H);
% Assign it to a generic PDE model and plot the geometry.
model = createpde;
model.Geometry = gm;
figure
pdegplot(model,'FaceLabels','on')
%Generate mesh and plot the mesh.
generateMesh(model)
figure
pdemesh(model);

MATLAB: Obtaining the vertices and their coordinates from a “DiscreteGeometry” object.

The object has a function called "vertexCoordinates" that will provide a list of all the vertices with their coordinates.

Here is an example of how to accomplish this:

>> model = createpde(3);
>> dg = importGeometry(model,'ForearmLink.stl');
>> vertices = dg.vertexCoordinates(1:dg.NumVertices)

If you would like to obtain the coordinates for a single vertex you can do the following:

>> dg.vertexCoordinates(2) % this will give you the coordinates of Vertex 2.

If you would like to visualize where the vertices are located in the geometry you can do so by executing the following function:

>> pdegplot(dg,'VertexLabels','on')

Best Answer

Related Solutions

MATLAB: Create tetrahedral mesh out of figure

MATLAB: Obtaining the vertices and their coordinates from a “DiscreteGeometry” object.

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