function output = getSortedGrooveLateralToMedial(obj)
  output = [];
  TS = obj.trigonumSpinae;
  if not(isempty(obj.groove))
    % sort groove from most lateral to most medial
    rawGroove = obj.groove;
    groove = [];
    for i = 1:size(rawGroove,1)
      nextGrooveIndex = findLongest3DVector(TS-rawGroove);
      groove(i,:) = rawGroove(nextGrooveIndex(1),:);
      rawGroove(nextGrooveIndex,:) = [];
    end
  end
  output = groove;
end