face.edges {fsbrain}

Enumerate all edges of the given faces or mesh.

Description

Compute edges of a tri-mesh. Can compute all edges, or only a subset, given by the face indices in the mesh.

Usage

face.edges(surface_mesh, face_indices = "all")

Arguments

surface_mesh

surface mesh, as loaded by subject.surface or read.fs.surface.

face_indices

integer vector, the face indices. Can also be the character string 'all' to use all faces.

Value

integer matrix of size (n, 2) where n is the number of edges. The indices (source and target vertex) in each row are **not** sorted, and the edges are **not** unique. I.e., each undirected edge 'u, v' (with the exception of edges on the mesh border) will occur twice in the result: once as 'u, v' and once as 'v, u'.

See Also

Other surface mesh functions: label.border(), mesh.vertex.included.faces(), mesh.vertex.neighbors(), subject.surface(), vis.path.along.verts()