tTh/Fortraneries
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

first step in revamping

Browse Source
This commit is contained in:
tTh
2026-06-02 18:20:09 +02:00
parent 8e14ec2c8d
commit 7ef447b0d8
10 changed files with 58 additions and 43 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
GravityField/Makefile
View File

@@ -2,7 +2,7 @@
# Fortraneries by tTh - Gravity Field
#
GFOPT = -Wall -Wextra -g -time -I../Modules
GFOPT = -Wall -Wextra -g -I../Modules
MODOBJ = ../Modules/spitpgm.o ../Modules/pixrgb.o
all: essai animation realdump2png

12
GravityField/README.md
View File

@@ -4,19 +4,25 @@ _Some crude experiments to make fancy picture of a useless gravity field._
Expect bug party.
## Le module `realfield`
## Le module realfield
Les mécaniques sous-jacentes. Sans la moindre rigueur mathématique.
Mais avec un bout de [code](./essai.f90) pour essayer des trucs et
des machins.
## Le commandeur en chef
C'est le logiciel sobrement nommé `animation` qui n'est absolument
C'est le logiciel sobrement nommé [`animation`](./animation.f90)
lequel n'est absolument
pas fini. Par exemple, il n'est absolument pas paramétrable sans
passer per une recompilation.
passer par une recompilation.
## Le raytracing
Vous vous en doutez, c'est du POVray.
Le fichier [vision.pov](./vision.pov), et en particulier l'object
`GravityField` assemblent le `height_field` et l'`image_map`
soigneusement calculés à l'étape précédente.
## Sortie graphique

22
GravityField/animation.f90
View File

@@ -13,20 +13,20 @@ program animation
implicit none
! some configuration constants
integer, parameter :: S_WIDTH = 2048
integer, parameter :: S_HEIGHT = 2048
integer, parameter :: NB_BODY = 666
integer, parameter :: IMG_WIDTH = 640
integer, parameter :: IMG_HEIGHT = 640
integer, parameter :: NB_BODY = 133
!!! WARNING : global variable !!!
type(massbody) :: planets(NB_BODY)
call init_random()
call create_some_planets(planets, 1664e3, S_WIDTH , S_HEIGHT)
call create_some_planets(planets, 1664.3, IMG_WIDTH , IMG_HEIGHT)
call print_barycentre_bodies(planets, 'begin')
call la_grande_boucle(0, 4000, planets)
call la_grande_boucle(0, 667, planets)
STOP ': YOLO TIME *NOW*'
! STOP ': YOLO TIME *NOW*'
!-----------------------------------------------------------------------
contains
@@ -46,16 +46,16 @@ subroutine la_grande_boucle(start, nbre, moons)
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 (filename, "(a, i5.5, a)") 'WS/nanim/', pass, '.pnm'
write(0, '(3I5, " * ", a20)') start, nbre, pass, filename
call build_and_write_a_field(S_WIDTH, S_HEIGHT, moons, filename)
call build_and_write_a_field(IMG_WIDTH, IMG_HEIGHT, moons, filename)
! save the current bodies positions (can be used in gnuplot)
! 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)
call make_color_map(planets, filename, IMG_WIDTH, IMG_HEIGHT)
enddo
@@ -134,8 +134,8 @@ subroutine deplace_les_planetes(moons, clipit)
real :: depx, depy, coef
integer, parameter :: EE = 100
integer :: SW = S_WIDTH - EE
integer :: SH = S_HEIGHT - EE
integer :: SW = IMG_WIDTH - EE
integer :: SH = IMG_HEIGHT - EE
do foo=1, ubound(moons, 1)

4
GravityField/encode.sh
View File

@@ -22,7 +22,7 @@ echo "file type :" $filetype
case $filetype in
PNG) extension=".png" ;;
Netpbm) extension=".pgm" ;;
Netpbm) extension=".pnm" ;;
*) extension=".pnm" ;;
esac
echo "extension :" $extension
@@ -32,7 +32,7 @@ TITLE=$(printf -- '---{ experimental gravity field %d }---' $$)
ffmpeg -nostdin \
-loglevel warning \
-y -r 30 -f image2 -i ${SDIR}/%05d${extension} \
-metadata artist='---{ tTh }---' \
-metadata artist='tTh des Bourtoulots' \
-metadata title="${TITLE}" \
-c:v libx264 -pix_fmt yuv420p \
$FNAME

8
GravityField/essai.f90
View File

@@ -7,10 +7,9 @@ program essai
use realfield
use spitpgm ! XXX
use pixrgb
implicit none
call init_random()
call init_random() ! defined in realfied module
call essai_near_planet(2048, 2048)
@@ -49,7 +48,6 @@ subroutine essai_near_planet(nbplanets, szfield)
fx = real(ix)
do iy=1, szfield
fy = real(iy)
near = -1
smalldist = 1e37
! loop over all the planet's bodies
@@ -63,15 +61,11 @@ subroutine essai_near_planet(nbplanets, szfield)
smalldist = curdist
endif
end do ! loop on ipl
cmap(ix, iy)%r = mod(near*4, 255)
cmap(ix, iy)%g = mod(near*7, 255)
cmap(ix, iy)%b = mod(near*11, 255)
enddo
write(0, *) "row", ix, " on", szfield
enddo
call rgbpix_spit_as_pnm_8(cmap, "rgb.pnm")

4
GravityField/plotation.sh
View File

@@ -1,5 +1,9 @@
#!/bin/bash
#
# I don't remember what this scrip is fscking doing
#
set -e
SRC=WS/data/00013.txt

22
GravityField/raytrace.sh
View File

@@ -2,11 +2,11 @@
set -e
POVOPT=" -q9 +a -W1280 -H1024 +WT2 -d -v "
POVOPT=" -q9 +a -W1152 -H900 +WT2 -d -v "
SOURCE="vision.pov"
TMPF="/dev/shm/gravfield.png"
date > pov.stderr
date > WS/pov.stderr
# ---------------------------------------
@@ -14,9 +14,16 @@ une_passe ()
{
clock=$1
cp pov.stderr old.stderr
cp WS/pov.stderr WS/old.stderr
povray -i${SOURCE} -K${clock} $POVOPT -O${TMPF} 2> pov.stderr
set +e
povray -i${SOURCE} -K${clock} $POVOPT -O${TMPF} 2> WS/pov.stderr
err=$?
if [ $err != 0 ] ; then
tail -20 WS/pov.stderr
exit 1
fi
set -e
timestamp=$(date -u +'%F %H:%M' | tr '01' 'Ol')
texte=$(printf "pass %04d" $clock | tr '01' 'Ol')
@@ -24,12 +31,12 @@ outfile=$(printf "WS/troid/%05d.png" $clock)
echo $timestamp $texte $outfile
convert ${TMPF} \
-pointsize 24 \
-pointsize 18 \
-font Courier-Bold \
-fill Yellow \
-annotate +20+32 "$timestamp" \
-annotate +20+58 "$texte" \
-pointsize 16 \
-pointsize 12 \
-gravity south-west \
-annotate +15+9 "tTh & Konrad" \
${outfile}
@@ -38,10 +45,9 @@ sleep 6
}
# ---------------------------------------
# main loop, build all that nice picz
for foo in $(seq 0 1999)
for foo in $(seq 0 665)
do
echo '............' $foo
une_passe $foo

16
GravityField/realfield.f90
View File

@@ -66,27 +66,29 @@ subroutine create_some_planets(planets, coef, sx, sy)
fmt = "(I4, ' | ', 2(F10.2, ' '), ' | ', 2F9.3, ' ', e12.3, I7)"
do foo=1, ubound(planets, 1)
if (foo .EQ. 1) then
!-
! the first planet is the home of Johnny Root
!-
planets(1)%posx = sx / 2
planets(1)%posy = sy / 2
planets(1)%mass = 31e8
planets(1)%mass = 7.12e3 + coef*foo*8.6
planets(1)%serial = 1337
planets(1)%speed = 6.666
else
do foo=2, ubound(planets, 1)
!-
! others are planets for peones
!-
planets(foo)%posx = rand() * real(sx-1)
planets(foo)%posy = rand() * real(sy-1)
planets(foo)%mass = 7.12e6 + coef*foo*3
planets(foo)%mass = 7.12e3 + coef*foo*3
planets(foo)%heading = 2 * 3.141592654 * rand()
if (rand() .LT. 0.15) planets(foo)%speed = 3.14159
planets(foo)%serial = foo*2 + 120
if (rand() .LT. 0.15) then
planets(foo)%speed = rand() * 2.0
else
planets(foo)%speed = rand() + 0.5
endif
planets(foo)%serial = foo*2 + 120
write (*, fmt) foo, planets(foo)
enddo

5
GravityField/runme.sh
View File

@@ -3,14 +3,17 @@
set -e # stop on error
make animation
echo err = $?
LOG="WS/log.animation"
date >> $LOG
rm WS/colmap/* WS/nanim/*
time ./animation | tee -a $LOG
./encode.sh WS/nanim/ gravity-field.mp4
./encode.sh WS/nanim/ gravity-nanim.mp4
./encode.sh WS/colmap/ gravity-colmap.mp4
ls -rtl *.mp4 >> $LOG

2
GravityField/vision.pov
View File

@@ -20,7 +20,7 @@ global_settings {
#declare HFDIR = "WS/nanim/";
#declare HFCK = mod(clock, 2000);
#declare HFNAME = concat(HFDIR, str(HFCK , -5, 0), ".pgm");
#declare HFNAME = concat(HFDIR, str(HFCK , -5, 0), ".pnm");
#declare CMDIR = "WS/colmap/";
#declare CMNAME = concat(CMDIR, str(HFCK , -5, 0), ".pnm");