program main !*****************************************************************************80 ! !! disk_grid_test() tests disk_grid(). ! ! Licensing: ! ! This code is distributed under the MIT license. ! ! Modified: ! ! 20 October 2013 ! ! Author: ! ! John Burkardt ! implicit none call timestamp ( ) write ( *, '(a)' ) ' ' write ( *, '(a)' ) 'disk_grid_test():' write ( *, '(a)' ) ' FORTRAN90 version' write ( *, '(a)' ) ' Test DISK_GRID().' call disk_grid_test01 ( ) call disk_grid_test02 ( ) ! ! Terminate. ! write ( *, '(a)' ) ' ' write ( *, '(a)' ) 'disk_grid_test():' write ( *, '(a)' ) ' Normal end of execution.' write ( *, '(a)' ) ' ' call timestamp ( ) stop 0 end subroutine disk_grid_test01 ( ) !*****************************************************************************80 ! !! DISK_GRID_TEST01 tests DISK_GRID. ! ! Licensing: ! ! This code is distributed under the MIT license. ! ! Modified: ! ! 09 November 2011 ! ! Author: ! ! John Burkardt ! implicit none integer, parameter :: rk = kind ( 1.0D+00 ) real ( kind = rk ) c(2) real ( kind = rk ), allocatable :: cg(:,:) character ( len = 80 ) boundary_filename integer boundary_unit character ( len = 80 ) command_filename integer command_unit character ( len = 80 ) data_filename integer data_unit character ( len = 80 ) filename integer i integer n integer ng real ( kind = rk ), parameter :: pi = 3.141592653589793D+00 real ( kind = rk ) r real ( kind = rk ) t write ( *, '(a)' ) ' ' write ( *, '(a)' ) 'TEST01:' write ( *, '(a)' ) ' DISK_GRID can define a grid of points' write ( *, '(a)' ) ' with N+1 points on a horizontal or vertical radius,' write ( *, '(a)' ) ' based on any disk.' n = 20 r = 2.0D+00 c(1) = 1.0D+00 c(2) = 5.0D+00 write ( *, '(a)' ) ' ' write ( *, '(a,i8)' ) ' We use N = ', n write ( *, '(a,g14.6)' ) ' Radius R = ', r write ( *, '(a,g14.6,a,g14.6,a)' ) ' Center C = (', c(1), ',', c(2), ')' call disk_grid_count ( n, r, c, ng ) write ( *, '(a)' ) ' ' write ( *, '(a,i8)' ) ' Number of grid points will be ', ng allocate ( cg(1:2,1:ng) ) call disk_grid ( n, r, c, ng, cg ) call r82vec_print_part ( ng, cg, 20, ' Part of the grid point array:' ) ! ! Write the coordinate data to file. ! filename = 'disk_grid_test01.xy' call r8mat_write ( filename, 2, ng, cg ) write ( *, '(a)' ) ' ' write ( *, '(a)' ) ' Data written to the file "' // trim ( filename ) // '".' ! ! Create graphics data files. ! call get_unit ( boundary_unit ) boundary_filename = 'disk_grid_test01_boundary.txt' open ( unit = boundary_unit, file = boundary_filename, status = 'replace' ) do i = 0, 50 t = 2.0D+00 * pi * real ( i, kind = rk ) / 50.0D+00 write ( boundary_unit, '(2x,g14.6,2x,g14.6)' ) & c(1) + r * cos ( t ), c(2) + r * sin ( t ) end do close ( unit = boundary_unit ) write ( *, '(a)' ) ' ' write ( *, '(a)' ) ' Created boundary file "' // trim ( boundary_filename ) // '".' call get_unit ( data_unit ) data_filename = 'disk_grid_test01_data.txt' open ( unit = data_unit, file = data_filename, status = 'replace' ) do i = 1, ng write ( data_unit, '(2x,g14.6,2x,g14.6)' ) cg(1:2,i) end do close ( unit = data_unit ) write ( *, '(a)' ) ' ' write ( *, '(a)' ) ' Created data file "' // trim ( data_filename ) // '".' ! ! Create graphics command file. ! call get_unit ( command_unit ) command_filename = 'disk_grid_test01_commands.txt' open ( unit = command_unit, file = command_filename, status = 'replace' ) write ( command_unit, '(a)' ) '# ' // trim ( command_filename ) write ( command_unit, '(a)' ) '#' write ( command_unit, '(a)' ) '# Usage:' write ( command_unit, '(a)' ) '# gnuplot < ' // trim ( command_filename ) write ( command_unit, '(a)' ) '#' write ( command_unit, '(a)' ) 'set term png' write ( command_unit, '(a)' ) 'set output "disk_grid_test01.png"' write ( command_unit, '(a)' ) 'set xlabel "<--- X --->"' write ( command_unit, '(a)' ) 'set ylabel "<--- Y --->"' write ( command_unit, '(a)' ) 'set title "Disk Grid"' write ( command_unit, '(a)' ) 'set grid' write ( command_unit, '(a)' ) 'set key off' write ( command_unit, '(a)' ) 'set size ratio -1' write ( command_unit, '(a)' ) 'set style data lines' write ( command_unit, '(a)' ) 'plot "' // trim ( data_filename ) // & '" using 1:2 with points lt 3 pt 3,\' write ( command_unit, '(a)' ) ' "' // trim ( boundary_filename ) // & '" using 1:2 lw 3 linecolor rgb "black"' write ( command_unit, '(a)' ) 'quit' close ( unit = command_unit ) write ( *, '(a)' ) & ' Created command file "' // trim ( command_filename ) // '".' deallocate ( cg ) return end subroutine disk_grid_test02 ( ) !*****************************************************************************80 ! !! DISK_GRID_TEST02 tests DISK_GRID_FIBONACCI. ! ! Licensing: ! ! This code is distributed under the MIT license. ! ! Modified: ! ! 20 October 2013 ! ! Author: ! ! John Burkardt ! implicit none integer, parameter :: rk = kind ( 1.0D+00 ) real ( kind = rk ) c(2) character ( len = 80 ) boundary_filename integer boundary_unit character ( len = 80 ) command_filename integer command_unit character ( len = 80 ) data_filename integer data_unit character ( len = 80 ) filename real ( kind = rk ), allocatable :: g(:,:) integer i integer n real ( kind = rk ), parameter :: pi = 3.141592653589793D+00 real ( kind = rk ) r real ( kind = rk ) t write ( *, '(a)' ) ' ' write ( *, '(a)' ) 'TEST02:' write ( *, '(a)' ) ' DISK_GRID_FIBONACCI can define a grid of N points' write ( *, '(a)' ) ' based on a Fibonacci spiral inside a disk.' n = 1000 r = 2.0D+00 c(1) = 1.0D+00 c(2) = 5.0D+00 write ( *, '(a)' ) ' ' write ( *, '(a,i8)' ) ' We use N = ', n write ( *, '(a,g14.6)' ) ' Radius R = ', r write ( *, '(a,g14.6,a,g14.6,a)' ) ' Center C = (', c(1), ',', c(2), ')' allocate ( g(1:2,1:n) ) call disk_grid_fibonacci ( n, r, c, g ) call r82vec_print_part ( n, g, 20, ' Part of the grid point array:' ) ! ! Write the coordinate data to a file. ! filename = 'disk_grid_test02.xy' call r8mat_write ( filename, 2, n, g ) write ( *, '(a)' ) ' ' write ( *, '(a)' ) ' Coordinate data written to the file "' // trim ( filename ) // '".' ! ! Create graphics data files. ! call get_unit ( boundary_unit ) boundary_filename = 'disk_grid_test02_boundary.txt' open ( unit = boundary_unit, file = boundary_filename, status = 'replace' ) do i = 0, 50 t = 2.0D+00 * pi * real ( i, kind = rk ) / 50.0D+00 write ( boundary_unit, '(2x,g14.6,2x,g14.6)' ) & c(1) + r * cos ( t ), c(2) + r * sin ( t ) end do close ( unit = boundary_unit ) write ( *, '(a)' ) ' ' write ( *, '(a)' ) ' Created boundary file "' // trim ( boundary_filename ) // '".' call get_unit ( data_unit ) data_filename = 'disk_grid_test02_data.txt' open ( unit = data_unit, file = data_filename, status = 'replace' ) do i = 1, n write ( data_unit, '(2x,g14.6,2x,g14.6)' ) g(1:2,i) end do close ( unit = data_unit ) write ( *, '(a)' ) ' ' write ( *, '(a)' ) ' Created data file "' // trim ( data_filename ) // '".' ! ! Create graphics command file. ! call get_unit ( command_unit ) command_filename = 'disk_grid_test02_commands.txt' open ( unit = command_unit, file = command_filename, status = 'replace' ) write ( command_unit, '(a)' ) '# ' // trim ( command_filename ) write ( command_unit, '(a)' ) '#' write ( command_unit, '(a)' ) '# Usage:' write ( command_unit, '(a)' ) '# gnuplot < ' // trim ( command_filename ) write ( command_unit, '(a)' ) '#' write ( command_unit, '(a)' ) 'set term png' write ( command_unit, '(a)' ) 'set output "disk_grid_test02.png"' write ( command_unit, '(a)' ) 'set xlabel "<--- X --->"' write ( command_unit, '(a)' ) 'set ylabel "<--- Y --->"' write ( command_unit, '(a)' ) 'set title "Fibonacci Grid"' write ( command_unit, '(a)' ) 'set grid' write ( command_unit, '(a)' ) 'set key off' write ( command_unit, '(a)' ) 'set size ratio -1' write ( command_unit, '(a)' ) 'set style data lines' write ( command_unit, '(a)' ) 'plot "' // trim ( data_filename ) // & '" using 1:2 with points lt 3 pt 3,\' write ( command_unit, '(a)' ) ' "' // trim ( boundary_filename ) // & '" using 1:2 lw 3 linecolor rgb "black"' write ( command_unit, '(a)' ) 'quit' close ( unit = command_unit ) write ( *, '(a)' ) & ' Created command file "' // trim ( command_filename ) // '".' deallocate ( g ) return end subroutine timestamp ( ) !*****************************************************************************80 ! !! timestamp() prints the current YMDHMS date as a time stamp. ! ! Example: ! ! 31 May 2001 9:45:54.872 AM ! ! Licensing: ! ! This code is distributed under the MIT license. ! ! Modified: ! ! 18 May 2013 ! ! Author: ! ! John Burkardt ! implicit none character ( len = 8 ) ampm integer d integer h integer m integer mm character ( len = 9 ), parameter, dimension(12) :: month = (/ & 'January ', 'February ', 'March ', 'April ', & 'May ', 'June ', 'July ', 'August ', & 'September', 'October ', 'November ', 'December ' /) integer n integer s integer values(8) integer y call date_and_time ( values = values ) y = values(1) m = values(2) d = values(3) h = values(5) n = values(6) s = values(7) mm = values(8) if ( h < 12 ) then ampm = 'AM' else if ( h == 12 ) then if ( n == 0 .and. s == 0 ) then ampm = 'Noon' else ampm = 'PM' end if else h = h - 12 if ( h < 12 ) then ampm = 'PM' else if ( h == 12 ) then if ( n == 0 .and. s == 0 ) then ampm = 'Midnight' else ampm = 'AM' end if end if end if write ( *, '(i2.2,1x,a,1x,i4,2x,i2,a1,i2.2,a1,i2.2,a1,i3.3,1x,a)' ) & d, trim ( month(m) ), y, h, ':', n, ':', s, '.', mm, trim ( ampm ) return end