this part need a lot of more work !

GravityField/.gitignore

@@ -1,6 +1,7 @@
 
 essai
 animation
+realdump2png
 
 WS/*.pgm
 WS/*.png

GravityField/Makefile

@@ -5,7 +5,7 @@
 GFOPT   = -Wall -Wextra -g -time -I../Modules
 MODOBJ  = ../Modules/spitpgm.o ../Modules/pixrgb.o
 
-all:	essai animation
+all:	essai animation realdump2png
 
 # ----------- modules
 
@@ -20,4 +20,7 @@ essai:	essai.f90  Makefile realfield.o
 animation:	animation.f90  Makefile realfield.o
 	gfortran $(GFOPT) $< realfield.o $(MODOBJ) -o $@
 
-#-
+realdump2png:	realdump2png.f90  Makefile realfield.o
+	gfortran $(GFOPT) $< realfield.o $(MODOBJ) -o $@
+
+#- remember bro: yolo forever :)

GravityField/WS/field/README.md

@@ -1,2 +0,0 @@
-
-# placeholder

GravityField/WS/nanim/README.md

@@ -1,2 +0,0 @@
-
-# placeholder

GravityField/WS/troid/README.md

@@ -1,2 +0,0 @@
-
-# placeholder

GravityField/animation.f90

@@ -13,18 +13,16 @@ program animation
   implicit none
 
   ! some configuration constants
-  integer, parameter      :: S_WIDTH  = 1024
+  integer, parameter      :: S_WIDTH  = 2048
-  integer, parameter      :: S_HEIGHT = 1024
+  integer, parameter      :: S_HEIGHT = 2048
-  integer, parameter      :: NB_BODY  = 51
+  integer, parameter      :: NB_BODY  = 250
 
   !!! WARNING : global variable !!!
   type(massbody)          :: planets(NB_BODY)
 
   call init_random()
   call create_some_planets(planets, 1664e3, S_WIDTH , S_HEIGHT)
-  call print_barycentre_bodies(planets)
+  call print_barycentre_bodies(planets, 'begin')
-
-  ! STOP 'BEFORE CRASH'
 
   call la_grande_boucle(0, 2000, planets)
 
@@ -33,7 +31,7 @@ program animation
 !-----------------------------------------------------------------------
 contains
 !-
-!         fabrication d'une de la sequence complete
+!         fabrication de la sequence complete
 !-
 subroutine la_grande_boucle(start, nbre, moons)
   integer, intent(in)            :: start, nbre
@@ -47,19 +45,21 @@ subroutine la_grande_boucle(start, nbre, moons)
     !                     else     use ?????ing
     call deplace_les_planetes(moons, .TRUE.)
   
+    ! computing the field (used as a HF in Povray
     write (filename, "(a, i5.5, a)") 'WS/nanim/', pass, '.pgm'
     write(0, '(3I5, "    *  ", a20)') start, nbre, pass, filename
     call build_and_write_a_field(S_WIDTH, S_HEIGHT, moons, filename)
 
-    write (filename, "(a, i5.5, a)") 'WS/data/', pass, '.txt'
+    ! save the current bodies positions (can be used in gnuplot)
-    call save_bodies_to_txt_file (planets, filename)
+    ! write (filename, "(a, i5.5, a)") 'WS/data/', pass, '.txt'
+    ! call save_bodies_to_txt_file (planets, filename)
 
     write (filename, "(a, i5.5, a)") 'WS/colmap/', pass, '.pnm'
     call make_color_map(planets, filename, S_WIDTH, S_HEIGHT)
 
   enddo
 
-call print_barycentre_bodies(moons)
+call print_barycentre_bodies(moons, 'end')
 
 end subroutine
 
@@ -107,14 +107,14 @@ subroutine make_color_map(moons, fname, width, height)
         endif
       end do    ! loop on all the moons, ipl index
 
-      cmap(ix, iy)%r = mod(near*13, 255)
+      cmap(ix, iy)%r = mod(near*3, 255)
-      cmap(ix, iy)%g = mod(near*14, 255)
+      cmap(ix, iy)%g = mod(near*4, 255)
-      cmap(ix, iy)%b = mod(near*15, 255)
+      cmap(ix, iy)%b = mod(near*5, 255)
 
     enddo
   enddo
 
-  call rgbpix_spit_as_pnm(cmap, fname)
+  call rgbpix_spit_as_pnm_8(cmap, fname)
 
   deallocate(cmap)
 
@@ -131,9 +131,9 @@ subroutine deplace_les_planetes(moons, clipit)
   logical, intent(in)              :: clipit
 
   integer                 :: foo
-  real                    :: depx, depy
+  real                    :: depx, depy, coef
 
-  integer, parameter      :: EE = 51
+  integer, parameter      :: EE = 100
   integer                 :: SW = S_WIDTH  - EE
   integer                 :: SH = S_HEIGHT - EE
 
@@ -162,7 +162,12 @@ subroutine deplace_les_planetes(moons, clipit)
       if (moons(foo)%posy .LT. EE)     moons(foo)%posy = SH
     endif
 
-    moons(foo)%heading = moons(foo)%heading + (0.78*(rand()-0.50))
+    if (rand() .LT. 0.15) then
+      coef = 1.63
+    else
+      coef = 0.78
+    endif
+    moons(foo)%heading = moons(foo)%heading + (coef*(rand()-0.42))
     if (moons(foo)%heading .GT. 6.283185307) moons(foo)%heading = 0.0
     if (moons(foo)%heading .LT. 0.000000001) moons(foo)%heading = 0.0
 

GravityField/encode.sh

@@ -23,7 +23,7 @@ echo "file type  :" $filetype
 case  $filetype in
 	PNG)		extension=".png"		;;
 	Netpbm)		extension=".pgm"		;;
-	*)		extension=".binary"		;;
+	*)		extension=".pnm"		;;
 esac
 echo "extension  :" $extension
 

GravityField/essai.f90

@@ -12,7 +12,7 @@ program essai
 
   call init_random()
 
-  call essai_near_planet(1024, 1024)
+  call essai_near_planet(2048, 2048)
 
   STOP 'BECAUSE YOLO'
 
@@ -74,7 +74,7 @@ subroutine essai_near_planet(nbplanets, szfield)
 
   enddo
 
-  call rgbpix_spit_as_pnm(cmap, "rgb.pnm")
+  call rgbpix_spit_as_pnm_8(cmap, "rgb.pnm")
 
 end subroutine
 !-----------------------------------------------------------------------

GravityField/raytrace.sh

@@ -2,7 +2,7 @@
 
 set -e
 
-POVOPT=" -q9 +a -W1024 -H768 +WT2 -d -v "
+POVOPT=" -q9 +a -W1280 -H1024 +WT2 -d -v "
 SOURCE="vision.pov"
 TMPF="/dev/shm/gravfield.png"
 
@@ -29,10 +29,12 @@ convert	${TMPF}				\
 	-fill Orange			\
 	-annotate +15+22  "$timestamp"	\
 	-annotate +15+48  "$texte"	\
-	-pointsize 16			\
+	-pointsize 14			\
 	-gravity south-west		\
 	-annotate +15+9 "tTh & Konrad"	\
 	${outfile}
+
+sleep 3
 }
 
 #		---------------------------------------
@@ -51,5 +53,6 @@ ffmpeg  -nostdin					\
 	-metadata artist='---{ tTh and Konrad }---'	\
 	-metadata title="Experiment on Gravity Field"	\
 	-c:v libx264 -pix_fmt yuv420p			\
-	bar.mp4
+ 	-preset veryslow				\
+	gravity-field.mp4
 

GravityField/realdump2png.f90

@@ -0,0 +1,23 @@
+!-----------------------------------------------------------------------
+!-
+!       convertir un dum de champ de reel en .PNG
+!	nouveau 17 decembre 2022
+!-
+!-----------------------------------------------------------------------
+program realdump2png
+  use  realfield
+  implicit none
+
+  stop "BECAUSE I'M TIRED *NOW*"
+
+contains
+!-----------------------------------------------------------------------
+
+subroutine load_a_dump_file(fname, location)
+  character(len=*), intent(in)         :: fname
+  real, dimension(:,:), intent(inout)  :: location
+
+end subroutine
+!-----------------------------------------------------------------------
+end program
+!-----------------------------------------------------------------------

GravityField/realfield.f90

@@ -29,7 +29,7 @@ subroutine compute_barycentre_bodies(astres, bcx, bcy)
   integer                        :: foo
   real                           :: cx, cy
 
-  !   May be we have to use DOUBLE RPECSION here ?
+  !   May be we have to use DOUBLE PRECSION here ?
   cx = 0.0
   cy = 0.0
   do foo=1, ubound(astres, 1)
@@ -40,12 +40,13 @@ subroutine compute_barycentre_bodies(astres, bcx, bcy)
   bcy = cy / real(ubound(astres, 1))
 end subroutine
 !-----------------------------------------------------------------------
-subroutine print_barycentre_bodies(astres)
+subroutine print_barycentre_bodies(astres, title)
   type(massbody), intent(in)     :: astres(:)
-  real                           :: cx, cy
+  character(len=*), intent(in)   :: title
 
+  real                           :: cx, cy
   call compute_barycentre_bodies(astres, cx, cy)
-  print *, "barycentre :   ", cx, cy
+  print *, "barycentre {", title, "}  ", cx, cy
 
 end subroutine
 !-----------------------------------------------------------------------
@@ -81,8 +82,8 @@ subroutine create_some_planets(planets, coef, sx, sy)
       !-
       planets(foo)%posx     = rand() * real(sx-1)
       planets(foo)%posy     = rand() * real(sy-1)
-      planets(foo)%mass     = 7e6 + coef*foo
+      planets(foo)%mass     = 7.12e6 + coef*foo
-      planets(foo)%heading  = 2 * 3.14159 * rand()
+      planets(foo)%heading  = 2 * 3.141592654 * rand()
       if (rand() .LT. 0.15) planets(foo)%speed = 3.14159
       planets(foo)%serial   = foo*2 + 120
     endif

GravityField/runme.sh

@@ -4,9 +4,13 @@ set -e				# stop on error
 
 make animation
 
-date > animation.log
+LOG="log.animation"
 
-time ./animation | tee animation.log
+date >> $LOG
 
-./encode.sh WS/nanim/ quux.mp4
+time ./animation | tee -a $LOG
-./encode.sh WS/colmap/ zzz.mp4
+
+./encode.sh WS/nanim/    gravity-field.mp4
+./encode.sh WS/colmap/   gravity-colmap.mp4
+
+ls -rtl *.mp4 >> $LOG

GravityField/vision.pov

@@ -45,7 +45,7 @@ texture {
 	}
 }
 
-object { GravityField scale <4, 0.60, 4> }
+object { GravityField scale <4.10, 0.60, 4.10> }
 
 // ----------------------------------------------------------------------
 
@@ -58,13 +58,13 @@ merge {
 XXX */
 
 light_source { < -2, 9.3, -7>	color Gray90			}
-light_source { < -6, 9.3, -8>	color Orange*0.75		}
+light_source { < -6, 9.3, -8>	color Orange*0.65		}
-light_source { < -15, 2.3, 17>	color Green*0.25			}
+light_source { < -15, 2.3, 17>	color Gray70			}
 
 // ----------------------------------------------------------------------
 
 camera	{
-	location	<-8, 4-(1.5*NormClock), 1 + (5*NormClock)>
+	location	<-8, 4-(1.7*NormClock), -4 + (11.66*NormClock)>
 	look_at		<0, 0, 0>
 	right		x*image_width/image_height
 	angle		33