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nice work done on Julia set

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tTh
2023-01-03 01:22:40 +01:00
parent 0e73e47272
commit b707b784bf
5 changed files with 109 additions and 10 deletions
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47
Fraktalism/julias.f90
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@@ -13,7 +13,7 @@ subroutine simple_julia(pic, cx, cy, maxiter)
integer, intent(in) :: maxiter
integer :: ix, iy, width, height
real :: fx, fy, fv
real :: fx, fy
complex :: Z, C
integer :: iter
logical :: over_iter
@@ -49,4 +49,49 @@ subroutine simple_julia(pic, cx, cy, maxiter)
end subroutine simple_julia
!===============================================================
subroutine julia_colormapped(pic, cx, cy, maxiter)
use pixrgb
type(t_pixrgb), intent(inout), dimension (:,:) :: pic
real, intent(in) :: cx, cy
integer, intent(in) :: maxiter
integer :: ix, iy, width, height
real :: fx, fy
complex :: Z, C
integer :: iter
logical :: over_iter
width = ubound(pic, 1)
height = ubound(pic, 2)
C = complex(cx, cy)
print *, "Color julia, const = ", C
do ix = 1, width
fx = (float(ix) / (float(width*2)/4.0) - 1.0)
do iy = 1, height
fy = (float(iy) / (float(height*2)/4.0) - 1.0)
! ------ traitement du pixel
iter = 0 ; over_iter = .FALSE.
Z = complex(fx, fy)
do while ((real(Z)*real(Z) + imag(Z)*imag(Z)) .LT. 4.0)
Z = (Z * Z) + C
iter = iter + 1
if (iter .GE. maxiter) then
over_iter = .TRUE.
exit
endif
end do
if (over_iter) then
pic(ix, iy)%r = 0
pic(ix, iy)%g = mod(abs(int(real(Z) *140)), 255)
pic(ix, iy)%b = mod(abs(int(aimag(Z)*140)), 255)
else
pic(ix, iy)%r = mod(iter*33, 255)
pic(ix, iy)%g = mod(iter*29, 255)
pic(ix, iy)%b = mod(iter*21, 255)
endif
enddo ! iy
enddo ! ix
end subroutine
!===============================================================
end module