function boundary_plot ( w, p, color, number )

%*****************************************************************************80
%
%% boundary_plot() plots a polyiamond from its boundary word.
%
%  Discussion:
%
%    The user should call "clf()" before this function.
%    More plotting commands may be issued if preceded by the "hold on"
%    command.
%
%    The boundary word describes how to trace the boundary by starting
%    at a base point (i,j), and taking a sequence of steps of unit length 
%    in one of 6 directions, as suggested by this diagram:
%
%          5-----0-----*
%      ^  / \   / \   /
%     /  /   \ /   \ /
%    J  4-----P-----1
%      / \   / \   /
%     /   \ /   \ /
%    *-----3-----2
%
%          I-->
%
%    If the current position P has parallelogram coordinates (I,J), then
%    the step of given index moves to
%
%      0  (I,  J+1)
%      1  (I+1,J  )
%      2  (I+1,J-1)
%      3  (I,  J-1)
%      4  (I-1,J  )
%      5  (I-1,J+1)
%
%  Licensing:
%
%    This code is distributed under the MIT license.
%
%  Modified:
%
%    10 November 2020
%
%  Author:
%
%    John Burkardt
%
%  Input:
%
%    string W: the boundary word.
%
%    integer P(1,2): the IJ coordinates of the boundary word starting point.
%
%    color COLOR: the color to use.
%
%    logical NUMBER: true if the triangle indices should be printed.
%
  v = boundary_to_vertex ( w, p );

  vertex_plot ( v, color, number );

  return
end

