Input Regions (3) 

MeshFeatureEdges works with MeshRegion, BoundaryMeshRegion, and other linear regions:

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MeshFeatureEdges works with open and closed regions:

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MeshFeatureEdges works on meshes with multiple dimensional components:

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Criteria (3) 

Specify the dihedral angle threshold used to identify feature edges:

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A negative angle threshold will identify all edges as feature edges:

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An angle threshold of Infinity results in no manifold edges being classified as feature edges:

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Non-manifold edges are not affected by the angle threshold:

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Forms (7) 

By default, MeshFeatureEdges returns a mesh with the feature edges highlighted:

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Use "Region" to get a mesh consisting only of the feature edges:

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Use "GraphicsComplex" to get a GraphicsComplex for efficiently rendering all the feature edges:

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Apply custom styling:

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Use "Primitives" to get the a list of Line primitives for the feature edges:

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Use "Indices" to get the indices of the feature edge cells:

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Use "Cells" to get the feature edge cells with indexed coordinates:

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Use a list of multiple forms to avoid repeated computation:

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IncludeIsolatedEdges (1) 

Whether to include edges with no adjacent faces:

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IncludeBoundaryEdges (1) 

Whether to include edges with a single adjacent face:

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IncludeSingularEdges (1) 

Whether to include edges with more than two adjacent faces:

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