program main !*****************************************************************************80 ! !! triangle_grid_test() tests triangle_grid(). ! ! Licensing: ! ! This code is distributed under the MIT license. ! ! Modified: ! ! 01 September 2010 ! ! Author: ! ! John Burkardt ! implicit none integer, parameter :: rk = kind ( 1.0D+00 ) call timestamp ( ) write ( *, '(a)' ) ' ' write ( *, '(a)' ) 'triangle_grid_test():' write ( *, '(a)' ) ' Fortran90 version' write ( *, '(a)' ) ' Test triangle_grid().' call test01 ( ) ! ! Terminate. ! write ( *, '(a)' ) ' ' write ( *, '(a)' ) 'TRIANGLE_GRID_TEST:' write ( *, '(a)' ) ' Normal end of execution.' write ( *, '(a)' ) ' ' call timestamp ( ) stop 0 end subroutine test01 ( ) !*****************************************************************************80 ! !! TEST01 tests TRIANGLE_GRID. ! ! Licensing: ! ! This code is distributed under the MIT license. ! ! Modified: ! ! 01 September 2010 ! ! Author: ! ! John Burkardt ! implicit none integer, parameter :: rk = kind ( 1.0D+00 ) integer, parameter :: n = 10 integer, parameter :: ng = ((n+1)*(n+2))/2 character ( len = 255 ) filename integer j real ( kind = rk ) t(2,3) real ( kind = rk ) tg(2,ng) write ( *, '(a)' ) ' ' write ( *, '(a)' ) 'TEST01' write ( *, '(a)' ) ' TRIANGLE_GRID can define a triangular grid of points' write ( *, '(a)' ) ' with N+1 points on a side, based on any triangle.' t = reshape ( (/ & 0.0D+00, 0.0D+00, & 1.0D+00, 0.0D+00, & 0.5D+00, 0.86602540378443860D+00 /), (/ 2, 3 /) ) write ( *, '(a)' ) ' ' write ( *, '(a)' ) ' Defining triangle:' write ( *, '(a)' ) ' J X Y' write ( *, '(a)' ) ' ' do j = 1, 3 write ( *, '(2x,i4,2x,g14.6,2x,g14.6)' ) j, t(1:2,j) end do call triangle_grid ( n, t, tg ) write ( *, '(a)' ) ' ' write ( *, '(a)' ) ' J X Y' write ( *, '(a)' ) ' ' do j = 1, ng write ( *, '(2x,i4,2x,g14.6,2x,g14.6)' ) j, tg(1:2,j) end do filename = 'triangle_grid_test01.xy' open ( unit = 1, file = filename, status = 'replace' ) do j = 1, ng write ( 1, '(2x,g14.6,2x,g14.6)' ) tg(1:2,j) end do close ( unit = 1 ) write ( *, '(a)' ) ' ' write ( *, '(a)' ) ' Data written to "' // trim ( filename ) // '".' 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 integer, parameter :: rk = kind ( 1.0D+00 ) 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 ( *, '(i2,1x,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