function d = p09_fd ( p )

%*****************************************************************************80
%
%% P20_FD is a signed distance function for problem 9.
%
%  Discussion:
%
%    ICAM is represented by 21 regions: 20 rectangles and one polygon.
%
%    Region 12 is not a room, and should be excluded.
%    Region 13 is a staircase to the second floor, and might be excluded.
%
%    The building is contained in the rectangle
%
%      -7 <= X <= 34
%       0 <= Y <= 98
%
%  Licensing:
%
%    This code is distributed under the GNU LGPL license.
%
%  Modified:
%
%    18 December 2008
%
%  Author:
%
%    John Burkardt
%
%  Parameters:
%
%    Input, real P, one or more points.
%
%    Output, real D, the signed distance of each point to the boundary of the region.
%
  v = [ ...
     7.25,  0.25; ... % Lower left corner of R1.
    14.75,  0.25; ...
    14.75,  7.75; ...
    13.00,  7.75; ...
    13.00,  8.25; ...
    25.00,  8.25; ...
    25.00,  7.75; ...
    15.25,  7.75; ...
    15.25,  0.25; ... % Lower left corner of R2.
    28.75,  0.25; ...
    28.75,  7.75; ...
    28.75,  8.25; ...
    29.25,  8.25; ...
    29.25,  7.75; ...
    29.25,  0.25; ... % Lower left corner of R3.
    40.75,  0.25; ...
    40.75,  7.75; ...
    33.00,  7.75; ...
    33.00,  8.25; ...
    33.25,  8.25; ... % Lower left corner of R5.
    40.75,  8.25; ...
    40.75, 17.75; ...
    33.25, 17.75; ...
    33.25, 12.00; ... 
    32.75, 12.00; ...
    32.75, 21.75; ...
    20.75, 21.75; ...
    20.75, 22.25; ...
    21.25, 22.25; ... % Lower left corner of R8.
    32.75, 22.25; ...
    32.75, 25.25; ...
    35.75, 25.25; ...
    35.75, 34.75; ...
    32.75, 34.75; ...
    32.75, 37.75; ...
    21.25, 37.75; ...
    21.25, 26.00; ...
    20.75, 26.00; ...
    20.75, 38.25; ...
    25.75, 38.25; ...
    26.25, 38.25; ... % Lower left corner of R11.
    32.75, 38.25; ...
    32.75, 45.75; ...
    26.25, 45.75; ...
    26.25, 41.75; ...
    25.75, 41.75; ...
    25.75, 46.25; ...
    26.25, 46.25; ... % Lower left corner of R15.
    32.75, 46.25; ...
    32.75, 53.75; ...
    26.25, 53.75; ...
    26.25, 49.25; ...
    25.75, 49.25; ...
    25.75, 53.75; ...
    23.75, 53.75; ...
    23.75, 62.75; ...
    23.75, 97.75; ...
    16.25, 97.25; ...
    16.25, 88.00; ...
    15.75, 88.00; ...
    15.75, 97.25; ...
     0.25, 97.25; ...
     0.25, 75.25; ... % Lower left corner of R21
    15.75, 75.25; ...
    15.75, 85.00; ...
    16.25, 85.00; ...
    16.25, 74.75; ...
     0.25, 74.75; ...
     0.25, 63.25; ... % Lower left corner of R19
    16.25, 63.25; ...       
    16.25, 62.75; ...
    16.25, 58.25; ... % Lower left corner of R18
    19.25, 58.25; ...
    19.25, 54.25; ...
    20.25, 54.25; ...
    20.25, 53.75; ...
    20.25, 50.75; ... % Lower left corner of R16.
    23.25, 50.75; ...
    23.25, 41.75; ...
    17.25, 41.75; ...
    16.75, 41.75; ...
    16.75, 53.75; ...
     7.25, 53.75; ...
     7.25, 38.25; ...
    17.25, 38.25; ... 
    17.25, 37.75; ...
     7.25, 37.75; ...
     7.25, 22.25; ...
    16.75, 22.25; ...
    16.75, 34.25; ...
    17.25, 34.25; ...
    17.25, 21.75; ...
     7.25, 21.75; ...
     7.25,  8.25; ... % Lower left corner of R4.
     9.00,  8.25; ...
     9.00,  7.75; ...
     7.25,  7.75; ...
     7.25,  0.25 ];

  d = dpoly ( p, v );

  return
end