66 lines
1.6 KiB
Fortran
66 lines
1.6 KiB
Fortran
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module fraktals
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implicit none
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contains
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!-----------------------------------------------------
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subroutine simple_julia(pic, cx, cy)
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implicit none
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integer, intent(inout), dimension (:,:) :: pic
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real, intent(in) :: cx, cy
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integer :: ix, iy, width, height
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real :: fx, fy
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complex :: Z, C
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integer :: iter, maxiter
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width = ubound(pic, 1)
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height = ubound(pic, 2)
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print *, "image size : ", width, height
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! print *, "constante : ", cx, cy
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maxiter = 500
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C = complex(cx, cy)
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print *, "C = ", C
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do ix = 1, width
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fx = (float(ix) / (float(width)/4.0) - 2.0)
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do iy = 1, height
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fy = (float(iy) / (float(height)/4.0) - 2.0)
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! ------ traitement du pixel
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iter = 0
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Z = complex(fx, fy)
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do while ( (modulus2(Z) .LT. 4.0) .AND. &
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(iter < maxiter) )
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Z = (Z * Z) + C
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iter = iter + 1
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end do
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pic(ix, iy) = iter
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! print *, ix, iy, " ", fx, fy, " ", iter
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enddo
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enddo
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end subroutine
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!-----------------------------------------------------
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function dist0 (x, y)
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implicit none
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real, intent(in) :: x, y
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real :: dist0
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dist0 = ( x*x + y*y )
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end function
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!-----------------------------------------------------
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function modulus2(pt)
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implicit none
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complex, intent(in) :: pt
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real :: modulus2
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modulus2 = real(pt)*real(pt) + imag(pt)*imag(pt)
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end
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!-----------------------------------------------------
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end module fraktals
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