36 lines
969 B
Fortran
36 lines
969 B
Fortran
!
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! R A N D O M W A L K
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! la marche de l'ivrogne qui cherche ses clefs sous
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! le lampadaire, juste là où il y a de la lumière.
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!
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program randomwalk
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use genplotting
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implicit none
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integer foo, col
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write (0, '(A)') "----[ genplotting randomwalk ]----"
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call srand(time())
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call genp_init (0, 'randomwalk.scratch')
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do foo=1, 51
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col = 2 + mod(foo, 4)
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call do_randomwalk(42, col)
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enddo
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call genp_end (0)
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contains
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! ---------------------------------------------------------
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subroutine do_randomwalk(nbre, col)
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integer, intent(in) :: nbre, col
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integer :: idx
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real :: px, py, px2, py2
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px = 0.0 ; py = 0.0
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do idx=1, nbre
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px2 = px + rand(0) - 0.50
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py2 = py + rand(0) - 0.50
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call genp_line(px, py, px2, py2, col)
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px = px2 ; py = py2
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enddo
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end subroutine
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! ---------------------------------------------------------
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end program
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