204 lines
6.3 KiB
Fortran
204 lines
6.3 KiB
Fortran
!-----------------------------------------------------
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! VOXELIZE
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! ========
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! this is the main program, see also mkvoxvidz.sh
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! showvoxels.pov and vox2inc.awk
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!-----------------------------------------------------
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program voxelize
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use fraktals
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implicit none
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integer, parameter :: DIMC = 180
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integer, dimension(:,:,:), allocatable :: cube
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type(t_point3d), dimension(:), allocatable :: points
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integer :: errcode, foo, argc
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integer :: ix, iy, iz
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integer :: nbr_points, maxcube
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double precision, dimension(4) :: KA, KB, KM
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double precision :: dmaxcube, delta
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character(200) :: filename, string
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write(0, *) "--- start of voxelize"
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argc = IARGC()
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if (2 .NE. argc) then
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STOP ": VOXELIZE NEED PARAMETERS !"
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endif
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call getarg(1, filename)
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call getarg(2, string) ; read (string, *) delta
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write(0, "( ' --- delta = ', F11.6)") delta
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allocate (cube(DIMC,DIMC,DIMC), stat=errcode)
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if (0 .NE. errcode) then
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STOP " : NO ENOUGH MEMORY FOR CUBE"
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endif
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nbr_points = 7000000
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allocate(points(nbr_points), stat=errcode)
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if (0 .NE. errcode) then
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STOP " : NO ENOUGH MEMORY FOR POINTS"
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endif
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KA(1) = -1.3402 ; KA(2) = 1.5245
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KA(3) = 1.0966 ; KA(4) = -2.3423
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KB(1) = -1.2100 ; KB(2) = 1.3685
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KB(3) = 1.3237 ; KB(4) = -2.3992
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call interp4dp(KA, KB, KM, delta)
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write(0, "(' --- coefs = ', 4F11.6)") KM
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call compute_pickover(points, KM)
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call clear_cube(cube)
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!
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! and now, we loop over all the pre-computed
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! points of the attractor
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!
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do foo=1, nbr_points
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call fcoor2icoor(points(foo)%x, ix)
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call fcoor2icoor(points(foo)%y, iy)
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call fcoor2icoor(points(foo)%z, iz)
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cube(ix,iy,iz) = cube(ix,iy,iz) + 1
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enddo
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maxcube = MAXVAL(cube)
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dmaxcube = DBLE(maxcube)
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write(0, *) "--- maxval(cube) = ", maxcube
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call spit_cube_as_union(filename, cube, &
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maxcube/2000, dble(9000.00))
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write(0, *) "--- end of voxelize"
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!-----------------------------------------------------
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contains
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!-----------------------------------------------------
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! or maybe, we can write a function ?
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subroutine fcoor2icoor(in, out)
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double precision, intent(in) :: in
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integer, intent(out) :: out
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double precision :: invalue
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integer :: outvalue
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invalue = (in + 2.0) / 2.0
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outvalue = int(invalue * real(DIMC/2))
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! add molly-guard here
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out = outvalue
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if (outvalue .LT. 1) out = 1
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if (outvalue .GE. DIMC) out = DIMC-1
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end subroutine
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!------------------------------------------------------------
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! USELESS USE OF LOOPS !
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subroutine clear_cube(cube)
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type(integer), dimension(:,:,:), intent(out) :: cube
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integer :: i, j, k
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do i=lbound(cube, 1), ubound(cube, 1)
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do j=lbound(cube, 2), ubound(cube, 2)
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do k=lbound(cube, 3), ubound(cube, 3)
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cube(i, j, k) = 0
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enddo
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enddo
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enddo
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end subroutine
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!------------------------------------------------------------
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subroutine print_cube(cube, points, scaling)
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type(integer), dimension(:,:,:), intent(in) :: cube
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type(t_point3d), dimension(:), intent(in) :: points
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double precision, intent(in) :: scaling
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integer :: foo
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do foo=1, nbr_points
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call fcoor2icoor(points(foo)%x, ix)
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call fcoor2icoor(points(foo)%y, iy)
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call fcoor2icoor(points(foo)%z, iz)
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print *, ix, iy, iz, &
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cube(ix,iy,iz), &
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DBLE(cube(ix,iy,iz)) / scaling
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enddo
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end subroutine
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!------------------------------------------------------------
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! generation Povray STL source file !
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subroutine spit_cube_as_union(fname, voxels, limit, scaling)
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character(*), intent(in) :: fname
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type(integer), dimension(:,:,:), intent(in) :: voxels
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integer, intent(in) :: limit
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double precision, intent(in) :: scaling
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integer :: fd, errcode
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integer :: ix, iy, iz, maxv
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integer :: nbrvox = 0
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double precision :: bx, by, bz, valeur
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character(200) :: chaine
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! molly-guard
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maxv = limit
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if (maxv .LT. 2) maxv = 2
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open (newunit=fd, file=trim(fname), &
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status='replace', &
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action='write', iostat=errcode)
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if (0 .NE. errcode) then
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STOP ' : SPIT UNION, FAIL OPEN OUTPUT FILE'
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endif
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write(fd, *) "// generated file, don't touch it bastard !"
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write(fd, *) "// version 2.09"
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write(fd, *) "#declare DIMC = ", DIMC, ";"
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write(fd, *) "#declare Voxels = object {"
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write(fd, *) "union {"
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bx = 0.0 ; by = 0.0 ; bz = 0.0
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do ix=lbound(voxels,1), ubound(voxels,1)
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do iy=lbound(voxels,2), ubound(voxels,2)
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do iz=lbound(voxels,3), ubound(voxels,3)
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if (cube(ix,iy,iz) .LT. maxv) then
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! print *, "foo = ", foo, cube(ix,iy,iz)
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cycle ! REDO FROM START
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endif
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nbrvox = nbrvox + 1
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bx = bx + dble(ix)
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by = by + dble(iy)
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bz = bz + dble(iz)
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valeur = DBLE(cube(ix,iy,iz)) / scaling
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! XXX
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if (valeur .GT. 1.5) then
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valeur = 1.5
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endif
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write(chaine, "( 'translate <', I4, ',', I4, ',', I4, '> ' )") &
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ix, iy, iz
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write(unit=fd, &
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fmt="( 'object { VOXEL scale ', F11.6, 1X, A, ' }' )", &
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iostat=errcode) &
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valeur, trim(chaine)
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enddo
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enddo
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enddo
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write(fd, *) "} }"
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write(fd, *) "// limit = ", limit
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write(fd, "( '#declare NbrVox = ', I9, ';' )") nbrvox
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write(fd, "( '#declare Bary_X = ', F11.6, ';' )") bx / dble(nbrvox)
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write(fd, "( '#declare Bary_Y = ', F11.6, ';' )") by / dble(nbrvox)
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write(fd, "( '#declare Bary_Z = ', F11.6, ';' )") bz / dble(nbrvox)
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close(fd)
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end subroutine
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!-----------------------------------------------------
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end program voxelize
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!-----------------------------------------------------
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