extend_neighbors: Recursive computation of neighborhoods, see surf.sphere.dist

In fsbrain: Managing and Visualizing Brain Surface Data

Recursive computation of neighborhoods, see surf.sphere.dist

Description

Compute neighborhood of the current vertex (=target vertex). The computation follows the mesh edges while there are still vertices which fullfil the dotproduct distance threshold.

Usage

extend_neighbors(
  spherical_surface,
  targetvidx,
  currentvidx,
  min_dotp_thresh,
  ref_visited,
  ref_neighbors,
  ref_neighbor_dpdists
)

Arguments

spherical_surface	an fs.surface instance representing the spherical version (lh.sphere or rh.sphere of the subject).
targetvidx	positive integer, initial target vertex. The vertex for which to compute the neighborhood.
currentvidx	positive integer, initial current vertex. Pass identical value as in targetvidx, this is changed later in the recursion.
ref_visited	pass-by-reference (via RefClasses) integer vector of length num_mesh_vertices: whether the respective vertex has been visited already.
ref_neighbors	pass-by-reference (via RefClasses) integer vector of length num_mesh_vertices: whether the respective vertex is part of the current neighborhood.
ref_neighbor_dpdists	pass-by-reference (via RefClasses) double vector of length num_mesh_vertices: the dotproduct distance to the respective vertex (if it is part of the neighborhood).
min_dotp_threshold	double, the minimal dotproduct distance threshold to use. Only vertices along the structural mesh neighborhood with values greater this will be included in the neighborhood. Yes, greater.

Value

integer, invisible. Either 0L or 1L. Used in the recursion only, ignore. The return values of interest are in the 3 ref_* parameters.

fsbrain documentation built on July 9, 2023, 7:12 p.m.