function v = vertex_gort ( )

%*****************************************************************************80
%
%% vertex_gort(): the IJ vertices forming the Gort polyiamond.
%
%  Discussion:
%
%    5           x x x x-x x
%                 /|  / /
%    4         x-x x x x x
%             /    |/ /
%    3       x-x x x x x
%              |    /
%    2     x x x x x x
%             /    |
%    1   x-x-x x x x
%       /         /
%    0 x-x-x-x-x-x
%
%      0 1 2 3 4 5
%
%    The vertex list of a polyiamond gives the IJ coordinates of the
%    polygonal vertices, in counterclockwise order.
%
%  Licensing:
%
%    This code is distributed under the MIT license.
%
%  Modified:
%
%    05 November 2020
%
%  Author:
%
%    John Burkardt
%
%  Output:
%
%    integer V(VN,2): the (I,J) parallelogram point coordinates
%    of the N vertices that bound the Gort polyiamond.
%
  v = [ ...
    0, 0; ...
    5, 0; ...
    5, 1; ...
    4, 2; ...
    4, 5; ...
    3, 5; ...
    3, 3; ...
    1, 5; ...
    1, 4; ...
    0, 4; ...
    0, 3; ...
    1, 3; ...
    2, 2; ...
    2, 1; ...
    0, 1 ];

  return
end

