Programmatically finding faces, edges, etc for an imported geometry

Is it possible to identify, based on location, faces of an imported geometry in the pde toolbox? Without looking at the plot visually.

Answer 1

[Jack]

Hey Jasdeep,

Yes, you can programmatically find faces, edges, and vertices of an imported geometry in the PDE Toolbox using the findFaces and findEdges functions along with geometric queries.

Finding Faces Based on Location

If your geometry is stored in model.Geometry, you can use findFaces to locate faces that contain a specific point:

model = createpde();
importGeometry(model, 'your_geometry.stl'); % Import your file

% Example: Find face containing a point (x, y, z)
queryPoint = [1, 2, 3]; % Modify as needed
faceID = findFaces(model.Geometry, 'Point', queryPoint);

disp(['Face ID at location: ', num2str(faceID)]);

Finding Edges Based on Location

To get edges near a specific location, use findEdges:

edgeID = findEdges(model.Geometry, 'NearestPoint', queryPoint);
disp(['Edge ID near location: ', num2str(edgeID)]);

Finding Face IDs Without Visual Inspection

If you need to check all faces and their approximate locations:

numFaces = model.Geometry.NumFaces;
for i = 1:numFaces
    disp(['Face ', num2str(i), ' centroid: ', num2str(centroid(model.Geometry, i))]);
end

This should let you programmatically identify faces and edges without manually checking the plot.

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