MESHBOUNDARY Boundary of a mesh as a collection of 3D line strings.

   CURVES = meshBoundary(V, F)

   Example
     % create centered icosahedron
     [v, f] = createIcosahedron;
     v(:,3) = v(:,3) - mean(v(:,3));
     % convert to simili-sphere
     [v2, f2] = subdivideMesh(v, f, 3);
     v3 = normalizeVector3d(v2);
     % clip with plane
     plane = createPlane([0 0 0], [-1 -2 3]);
     [vc, fc] = clipMeshVertices(v3, f2, plane, 'shape', 'plane');
     figure; drawMesh(vc, fc); axis equal; view(3);
     % draw mesh boundary
     curves = meshBoundary(vc, fc);
     hold on; drawPolygon3d(curves{1}, 'linewidth', 2, 'color', 'b');

   See also
     meshes3d, meshBoundaryEdgeIndices, meshBoundaryVertexIndices

Package: matgeom