%% TEST03 tests HEX_GRID_ANGLE_01_WRITE.
%
%  Modified:
%
%    24 October 2006
%
%  Author:
%
%    John Burkardt
%
  clear

  dim_num = 2;

  file_name = 'hex_grid_angle_01_dataset.txt';
  seed = 123456789;

  fprintf ( 1, '\n' );
  fprintf ( 1, 'TEST03\n' );
  fprintf ( 1, '  HEX_GRID_ANGLE_01_WRITE writes the points of a\n' );
  fprintf ( 1, '  angled hexagonal grid to a file.\n' );

  fprintf ( 1, '\n' );
  fprintf ( 1, '        CENTER           ANGLE       H         N\n' );
  fprintf ( 1, '\n' );

  for i = 1 : 3

    [ center(1), seed ] = r8_uniform_01 ( seed );
    [ center(2), seed ] = r8_uniform_01 ( seed );
    [ t, seed ] = r8_uniform_01 ( seed );
    angle = 180.0 * t;
    h = 0.107457;

    n = hex_grid_angle_01_size ( center, angle, h );

    fprintf ( 1, '  %8f  %8f  %8f  %10f  %6d\n', ...
      center(1:dim_num), angle, h, n );

  end

  r = hex_grid_angle_01 ( center, angle, h, n );

  hex_grid_angle_01_write ( center, angle, h, n, r, file_name );

  fprintf ( 1, '\n' );
  fprintf ( 1, '  The data was written to "%s".\n', file_name );