81 lines
3.1 KiB
Fortran
81 lines
3.1 KiB
Fortran
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!prec.f90 407 2009-08-31 15:09:15Z MPIE\f.roters
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!##############################################################
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MODULE prec
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!##############################################################
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implicit none
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! *** Precision of real and integer variables ***
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integer, parameter :: pReal = selected_real_kind(15,300) ! 15 significant digits, up to 1e+-300
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integer, parameter :: pInt = selected_int_kind(9) ! up to +- 1e9
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integer, parameter :: pLongInt = 8 ! should be 64bit
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END MODULE prec
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program voronoi
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use prec, only: pReal, pInt
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implicit none
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logical, dimension(:), allocatable :: seedmap
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character(len=1024) filename
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integer(pInt) a, b, c, N_Seeds, seedpoint, i
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real(pReal), dimension(:,:), allocatable :: grainEuler, seeds
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real(pReal), parameter :: pi = 3.14159265358979323846264338327950288419716939937510_pReal
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real(pReal) randomSeed
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print*, '******************************************************************************'
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print*, ' Voronoi description file'
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print*, '******************************************************************************'
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print*, ''
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print*, 'generates:'
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print*, ' * description file "_GIVEN_NAME_.seeds":'
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print*, ''
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write(*, '(A)', advance = 'NO') 'Please enter value for first resolution: '
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read(*, *), a
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write(*, '(A)', advance = 'NO') 'Please enter value for second resolution: '
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read(*, *), b
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write(*, '(A)', advance = 'NO') 'Please enter value for third resolution: '
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read(*, *), c
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write(*, '(A)', advance = 'NO') 'Please enter No. of Grains: '
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read(*, *), N_Seeds
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write(*, '(A)', advance = 'NO') 'Please enter name of geometry file: '
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read(*, *), filename
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allocate (seedmap(a*b*c)); seedmap = .false. ! logical to store information which position is occupied by a voronoi seed
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allocate (seeds(N_Seeds,3))
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allocate (grainEuler(N_Seeds,3))
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do i=1, N_Seeds
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call random_number(grainEuler(i,1))
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call random_number(grainEuler(i,2))
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call random_number(grainEuler(i,3))
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grainEuler(i,1) = (grainEuler(i,1))*360
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grainEuler(i,2) = acos(2.0_pReal*(grainEuler(i,2))-1.0_pReal)*180/pi
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grainEuler(i,3) = grainEuler(i,3)*360
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enddo
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!generate random position of seeds for voronoi tessellation
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i = 0
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do while (i /= N_Seeds)
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call random_number(randomSeed)
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seedpoint = int(randomSeed*(a*b*c))
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if (.not.seedmap(seedpoint+1)) then
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seedmap(seedpoint+1) = .true.
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i = i + 1
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seeds(i,1) = real(mod((seedpoint), a)+1)/real(a, pReal)
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seeds(i,2) = real(mod(((seedpoint)/a), b)+1)/real(b,pReal)
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seeds(i,3) = real(mod(((seedpoint)/(a*b)), c)+1)/real(c,pReal)
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end if
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end do
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! write description file with orientation and position of each seed
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open(21, file = trim(filename)//('.seeds'))
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write(21, '(A, I2, A, I2, A, I2)'), 'resolution a ', a, ' b ', b, ' c ', c
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write(21,*), 'grains', N_Seeds
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do i = 1, n_Seeds
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write(21, '(6(F10.6,tr2))'),seeds(i,1), seeds(i,2), seeds(i,3),&
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grainEuler(i,1), grainEuler(i,2), grainEuler(i,3)
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end do
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close(21)
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end program voronoi
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