84 lines
2.5 KiB
Fortran
84 lines
2.5 KiB
Fortran
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!-----------------------------------------------------
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! MANDELBROT SET
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!-
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! refactored Thu 29 Dec 2022 03:21:16 PM CET
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! refactored Sat 31 Dec 2022 12:37:03 PM CET
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!-
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!-----------------------------------------------------
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!-
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module mandelbrots
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implicit none
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contains
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!-----------------------------------------------------------------------
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subroutine mandelbrot_one(pic, start)
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! use cmplxmath
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! use imagetools
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use pixrgb
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implicit none
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type(t_pixrgb), intent(inout), dimension (:,:) :: pic
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complex, intent(in) :: start
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! type (CenterMag), intent(in) :: cz
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integer :: ix, iy, width, height
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real :: fx, fy, mod2, rval
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complex :: za, zb, cste
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integer :: iter, maxiter
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logical :: escape
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write(0,*) "> plotsomething"
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width = ubound(pic, 1)
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height = ubound(pic, 2)
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! print *, " pic size ", width, height
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print *, real(start), aimag(start)
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! initialise constants
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!
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maxiter = 1984
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! enter megaloop
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!
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do iy = 1, height
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fy = (float(iy) / float(height/3)) - 1.5
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!! print *, "line ", iy, fy
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do ix = 1, width
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fx = (float(ix) / float(width/3)) - 2.0
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!-------------------------------------
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! working on the current pixel
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za = start
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cste = complex ( fx, fy )
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iter = 0
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escape = .FALSE.
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do while (iter .lt. maxiter)
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zb = (za * za) + cste
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mod2 = real(zb)*real(zb) + aimag(zb)*aimag(zb)
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!! print *, "mod2 ", mod2
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if (mod2 .GT. 4.0) then
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escape = .TRUE.
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exit
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endif
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za = zb
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iter = iter + 1
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!! print *, "ZA ITER ESCAPE", za, iter, escape
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enddo
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if (escape) then
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pic(ix, iy)%r = mod(iter*12, 255)
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pic(ix, iy)%b = mod(iter*7, 255)
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else
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rval = (sqrt(mod2) + abs(real(start)*aimag(start))) * 9e2
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pic(ix, iy)%g = mod(int(rval), 210)
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! pic(ix, iy)%g = mod(iter, 255)
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! pic(ix, iy)%b = mod(iter*11, 255)
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endif
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!-------------------------------------
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end do ! fin boucle sur X
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end do
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end subroutine
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!-----------------------------------------------------
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end module
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!-----------------------------------------------------
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