Method Detail

• getNJunctionAngles

  public static List<List<Double>> getNJunctionAngles(Collection<Vertex> vertices)

  Calculates the angles between the branches of each vertex.

  For example, if a vertex has 3 branches, it's returned as a list of 3 angles. That is, angles between branches 1-2, 1-3 and 2-3. A vertex with no branches or only one branch returns an empty list.

  Angle between branches 1 and 2 is measured from their respective end points (vertices opposite the current "junction", i.e. the vertex being processed).

  Parameters:

  vertices - vertices from a graph.

  Returns:

  a list of angles in radians of the vertex branches.

• groupByValence

  public static Map<Integer,List<Vertex>> groupByValence(Collection<Vertex> vertices,
                                                         int min,
                                                         int max)
                                                  throws IllegalArgumentException

  Groups vertices by their valence, i.e. by their number of branches.

  Only vertices with valence in the given range are grouped.

  Parameters:

  vertices - vertices from a graph

  min - minimum valance (inclusive) for grouped vertices

  max - maximum valence (inclusive) for grouped vertices

  Returns:

  a (Valence, Vertices with valence) mapping.

  Throws:

  IllegalArgumentException - if min < 0, or min > max.