minor changes also here

Fraktalism/README.md

@@ -9,8 +9,8 @@ qui montre ma première expérience dans ce domaine.
 ## La technique
 
 Le gros des calculs de fractales est fait dans `mods/fraktals.f90`,
-et la gestion des pixels 'physiques' est faite par le
-module externe `spitpgm`.
+et la gestion des pixels 'physiques' est faite par les
+modules externes `spitpgm` et `pixrgb`.
 
 Les fonctions d'usage général sont dans
 [mods/](répertoire mods/) ave trop peu
@@ -38,3 +38,6 @@ Generally writen as a *sequencial unformated* file.
 - Rajouter des formules
 - Ne pas procastiner sur le reste
 
+## See also
+
+- https://www.maths.town/fractal-articles/mandelbulb/mandelbulb-all-powers/

Fraktalism/fraktals.f90

@@ -153,5 +153,4 @@ function modulus2(pt)
   modulus2 = real(pt)*real(pt) + imag(pt)*imag(pt)
 end
 !-----------------------------------------------------
-
 end module fraktals

Fraktalism/henon.f90

@@ -25,7 +25,6 @@ program henon
 !-----------------------------------------------------
 contains
 !-----------------------------------------------------
-
 !-----------------------------------------------------
 subroutine compute_pixel_henon(a, b, maxpasse, passe, limit, rx, ry)
   implicit none

Fraktalism/julia.f90

@@ -1,33 +0,0 @@
-!-----------------------------------------------------
-!           JULIA
-!           =====
-!    this is the main program
-!-----------------------------------------------------
-
-program julia
-
-    use spitpgm
-    use fraktals
-
-    implicit none
-
-    integer, dimension(512, 342)    ::    picz
-    integer                         ::    argc
-    character(200)                  ::    filename, string
-    real                            ::    cx, cy
-
-    argc = IARGC()
-    if (3 .NE. argc) then
-      STOP ": JULIA PROGGY NEED PARAMETERS !"
-    endif
-
-    call getarg(1, filename)
-    call getarg(2, string)       ;   read (string, *) cx
-    call getarg(3, string)       ;   read (string, *) cy
-
-    call simple_julia(picz, cx, cy, 2500)
-    call spit_as_pgm_8(picz, trim(filename))
-
-end program
-
-!-----------------------------------------------------

Fraktalism/lorentz.f90

@@ -1,31 +0,0 @@
-! 
-!    this is the main programm
-! 
-!-----------------------------------------------------
-
-program lorentz
-
-    use spitpgm
-    use fraktals
-
-    implicit none
-
-    integer, dimension(800, 600)    ::    picz
-    integer                         ::    argc
-    character(200)                  ::    filename
-
-    argc = IARGC()
-    if (1 .NE. argc) then
-      STOP ": LORENTZ NEED A FILENAME !"
-    endif
-
-    call getarg(1, filename)
-
-    write (0, "(A)") "Lorentz -> "//trim(filename)
-
-    call lorentz_0(picz, 50000)
-    call spit_as_pgm_8(picz, trim(filename))
-
-end program
-
-!-----------------------------------------------------

Fraktalism/mods/xperiment.f90

@@ -8,8 +8,6 @@ module xperiment
 
 subroutine parasites_1(pic, cx, cy, maxiter)
     implicit none
-
-    ! here is the wtf
     integer, intent(inout), dimension (:,:)  ::  pic
 
     real, intent(in)                         ::  cx, cy
@@ -23,22 +21,18 @@ subroutine parasites_1(pic, cx, cy, maxiter)
  
     width  = ubound(pic, 1)    ;    height = ubound(pic, 2)
     coef   = float(maxiter)
-
     do ix = 1, width
       fx = cx + (float(ix) / (float(width)/4.0) - 2.0)
       burps = (RAND() .lt. 0.01)
       do iy = 1, height
         fy = cy + (float(iy) / (float(height)/4.0) - 2.0)
-
         if (burps) then
           pic(ix, iy) = int(fx * fy * coef * 1.005)
         else
           pic(ix, iy) = int(fx * fy * coef)
         endif
-
       enddo
     enddo
-
 end subroutine parasites_1
 
 !---------------------------------------------------------------
@@ -52,13 +46,9 @@ subroutine loop_of_parasites_1(nbre, mode)
     integer                   :: idx
 
     if (mode .NE. 0)  STOP "BAD MODE"
-
     do idx = 0, nbre
-
       write(0, *) "popcorn loop ", idx
-
     enddo
-
 end subroutine loop_of_parasites_1
 
 !===============================================================

GrafAnim/README.md

@@ -13,6 +13,8 @@ un peu foireux sur les tracés de ligne...
 
 Distorsions approximatives de la courbe de Lissajous.
 
+Expériences inspirées par  https://bleuje.com/tutorial1/ que c'est d'la balle !
+
 ## doubledice
 
 Ou comment dessiner des gaussiennes.

GrafAnim/doubledice.f90

@@ -1,9 +1,61 @@
 program doubledice
   use usegenplot
+  use utils_ga
+
   implicit none
 
-  call init_genplot("essai.genplot")
+  integer                   :: nbarg, numframe
+  character(len=256)        :: arg
+  integer                   :: idx, foo, bar, xpos
+  integer                   :: buckets(12)
 
-  call end_genplot("OK boomer")
+  nbarg = IARGC()
+  if (nbarg .GT. 0) then
+       call GETARG(1, arg)
+       ! write (0, '(A40, A5)') "argument = ",  arg
+       read (arg, *) numframe
+  endif
+
+  write(0, '(" ------------- DOUBLE DICE ----------")')
+  write(0, '(" --> frame number:", I5)') numframe
+  call init_genplot("dummy.genplot")
+  call gplt_rect(0, 0, 800, 600)
+  call gplt_setcol(3)
+  call gplt_rect(8, 8, 48, 38)
+  call gplt_setcol(2)
+
+  buckets = 0
+  do idx=1, numframe
+    call jouer_un_tour(buckets, idx)
+    foo = maxval(buckets)
+    ! write(0, *) "max value", foo
+  enddo
+
+  call gplt_line(5, 40, 795, 40)
+  do bar=1, 12
+    xpos = bar*50 + 25
+    ! write(0, *) bar, xpos, buckets(bar)
+    call gplt_rect(xpos, 41, xpos+50, 41+15*buckets(bar))
+  enddo
+
+  call end_genplot("OK boomer...")
+
+contains
+
+! ---------------------------------------------------------
+
+subroutine jouer_un_tour(table, compte)
+  integer,intent(inout)   :: table(12)
+  integer, intent(in)     :: compte
+
+  integer                 :: DA, DB, valeur
+
+  DA = fair_random_dice()
+  DB = fair_random_dice()
+  valeur = DA + DB
+  ! write(0, *) "pass ", compte, "  =  ", DA, DB, valeur
+  table(valeur) = table(valeur) + 1
+
+end subroutine
 
 end program

GrafAnim/doublegauss.f90

@@ -0,0 +1,33 @@
+program doublegauss
+  use pixrgb
+  use utils_ga
+  implicit none
+
+  type(t_pixrgb), allocatable     ::    pic(:,:)
+  character (len=80)              ::    filename
+  integer                         ::    pass, iter
+  integer                         ::    xrnd, yrnd
+
+  write(0, *) "----- making a doublegauss picture ----"
+
+  allocate(pic(320, 240))
+  call rgbpix_set_to_zero(pic)
+
+  do pass=0, 99
+    do iter=1, 15000
+      xrnd = fair_random_gauss(320)
+      yrnd = fair_random_gauss(240)
+      ! print *, xrnd, yrnd
+      pic(xrnd,yrnd)%r = pic(xrnd,yrnd)%r + 1
+      pic(xrnd,yrnd)%g = pic(xrnd,yrnd)%g + 2
+      pic(xrnd,yrnd)%b = pic(xrnd,yrnd)%b + 3
+    end do
+
+    write (filename, "(a, i5.5, a)") "F/DBG/", pass, ".pnm"
+    print *, trim(filename)
+    call rgbpix_spit_as_pnm_8 (pic, trim(filename))
+
+  end do
+
+end program
+

GrafAnim/runme.sh

@@ -0,0 +1,19 @@
+#!/bin/bash
+
+set -e
+
+SCRATCH="dummy.genplot"
+
+make doubledice
+
+rm -f F/????.tga
+
+for foo in $(seq 1 250)
+do
+	rm -f dummy.genplot
+	./doubledice $foo 
+	filename=$(printf "F/%04d.tga" $foo)
+	genplot2 -s 640x480 ${SCRATCH} $filename
+done
+
+convert -delay 10 F/????.tga foo.gif

GrafAnim/usegenplot.f90

@@ -3,26 +3,40 @@ module usegenplot
   implicit none
 
     integer, private           :: color = 4
+    integer, private           :: iochannel = -1
     logical, private           :: initialised = .FALSE.
+
   contains
 
 ! -------------------------------------------------------------------
 
 subroutine init_genplot(filename)
-
   character(*), intent(in)    :: filename
+
+  integer                     :: errcode
+
   write(0, *)   '--> init genplot "', filename, '"'
+  open(newunit=iochannel, file=filename, iostat=errcode)
+  write(0, *)   'iochannel', iochannel, 'errcode', errcode
+
   initialised = .TRUE.
   color = 4
 
+  ! XXX STOP 'ABEND'
+
 end subroutine
 
 subroutine end_genplot(message)
-
   character(*), intent(in)    :: message
+
+  integer                     :: errcode
+
   write(0, *)   '--> end genplot "', message, '"'
   initialised = .FALSE.
 
+  close(unit=iochannel, iostat=errcode)
+  write(0, *)   'close errcode', errcode
+
 end subroutine
 
 ! -------------------------------------------------------------------
@@ -38,7 +52,7 @@ subroutine do_initialise_once(motif)
 end subroutine
 
 ! -------------------------------------------------------------------
-
+!-    getter, setter, wtf ?
 subroutine gplt_setcol(col)
   integer, intent(in)           :: col
   color = col
@@ -55,8 +69,7 @@ subroutine gplt_move(x, y)
   if (.NOT. initialised) then
     call do_initialise_once('in gplt_move')
   endif
-
-  print *, x, y, 0
+  write(iochannel, '(3I8)') x, y, 0
 end subroutine
 
 ! -------------------------------------------------------------------
@@ -66,7 +79,7 @@ subroutine gplt_draw(x, y)
   if (.NOT. initialised) then
     call do_initialise_once('in gplt_draw')
   endif
-  print *, x, y, color
+  write(iochannel, '(3I8)') x, y, color
 end subroutine
 
 ! -------------------------------------------------------------------
@@ -78,10 +91,23 @@ subroutine gplt_line(x1, y1, x2, y2)
 end subroutine
 
 ! -------------------------------------------------------------------
+!-
+!                           sx, sy
+!        +-------------------+
+!        |             x2,y2 |
+!        |                   |
+!        |                   |
+!        | x1,y1             |
+!        +-------------------+
+!       0,0
 
 subroutine gplt_rect(x1, y1, x2, y2)
    integer, intent(in)           :: x1, y1, x2, y2
 
+  if (.NOT. initialised) then
+    call do_initialise_once('in gplt_rect')
+  endif
+
    call gplt_move(x1, y1)
    call gplt_draw(x2, y1)
    call gplt_draw(x2, y2)

GrafAnim/utils_ga.f90

@@ -0,0 +1,41 @@
+! -------------------------------------------------------------------
+!-      fonctions diverses pour faire des images bizarres
+! -------------------------------------------------------------------
+
+module utils_ga
+  use pixrgb
+  implicit none
+
+  contains
+
+! -------------------------------------------------------------------
+function fair_random_dice()
+  integer            :: fair_random_dice
+
+  fair_random_dice = 1 + int(rand()*6.0)
+
+end function
+! -------------------------------------------------------------------
+!     usage  -->  see doublegauss.f90
+function fair_random_gauss(hilevel)
+  integer, intent(in) :: hilevel
+  integer             :: fair_random_gauss
+  integer             :: foo, bar
+
+  foo = int(rand()*hilevel/2)
+  bar = int(rand()*hilevel/2)
+  fair_random_gauss = 1 + foo + bar
+
+end function
+! -------------------------------------------------------------------
+!     usage  -->  see doublegauss.f90
+subroutine increment_pixel(pix, k)
+  type(t_pixrgb), intent(inout)  :: pix
+  integer                        :: k
+
+
+
+end subroutine
+! -------------------------------------------------------------------
+
+end module

GrafAnim/vue3axes.f90

@@ -0,0 +1,12 @@
+module vue3axes
+  use pixrgb
+  implicit none
+!-------------------------------------------------------------
+
+
+!-------------------------------------------------------------
+!-
+!-	ouf, c'est fini
+!-
+end module
+

README.md

@@ -16,6 +16,10 @@ l'existence des _pointeurs_ compense largement.
 - [RandomStuff](RandomStuff/) : on a tous droit à notre jardin secret
 - [GrafAnim](GrafAnim/) : Ah, enfin de la gif89a en vue !
 
+## Prérequis
+
+- GNUtrucs : bash, make, awk... 
+
 ## hotline
 
 - Le canal `#tetalab` sur le réseau IRC de

SoundBrotching/c-tools/text2wav.c

@@ -65,6 +65,12 @@ while (2==fscanf(input, "%d %d", &left, &right)) {
 	buffer[idx++] = left;
 	buffer[idx++] = right;
 
+	/* SANITY CONTROL */
+	if ( (abs(left) > 32767) || (abs(right) > 32767) ) {
+		fprintf(stderr, "OVERFLOW sample %9d   values %7d %7d\n",
+						idx, left, right);
+		}
+
 	if (idx >= SMPL_COUNT) {
 		/* flush buffer to file */
 		sf_write_short(sndf, buffer, idx);

SoundBrotching/soundbrotch.f90

@@ -6,6 +6,10 @@ module soundbrotch
     integer             :: left
     integer             :: right
   end type
+  type t_sample2r
+    real                :: left
+    real                :: right
+  end type
   ! ---------------------------------------------------------
   !      some private variables