[source] création du fichier obj d'un cube
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| #!/bin/bash
# Description : Générer le fichier object (.obj) d'un cube.
# Possibilité de mettre une texture différente sur chaque face (option -m "tex1 tex2 tex3 tex4...")
#====================================================================================
# Options -x : x origine
# -y : y origine
# -w : largeur du cube
# -h : hauteur du cube
# -o : nom de base (sans extention) du fichiers .obj
# -a : angle de rotation autour de Ox
# -b : angle de rotation autour de Oy
# -c : angle de rotation autour de Oz # -e : Epaisseur du cube
# -f : fichier mtl
# -m : materiel à* utiliser
# -i : inverse la texture
#========================================================
#
# CONSTANTES
#
USAGE="Utilisation : $0 -f <mtl_file> -m <material> [-i] [-x <x_origin>] [-y <y_origin>] [-z <z_origin>] [-w <width>] [-h <height>] [-a <angle(deg)>] [-b <angle(deg)>] [-c <angle(deg)>] [-e <ply>] [-o <output_basename>]"
PI=$(echo "scale=10; 4*a(1)" | bc -l)
#
# OPTIONS PAR DEFAUT
#
mtl="" # chemin du fichier mtl # @TODO mtl obligatoire pour valeur dans mtl_name # @TODO TEXTURE OBLIGATOIRE
mtl_alias="" # nom du matériel à* utiliser
obj="out.obj" # nom du fichier de sortie objet
x0=0
y0=0
z0=0
width=10
height=10
a=0
b=0
c=0
e=2
reverse=0
#
# ANALYSE DES OPTIONS
#
while getopts :x:y:z:w:h:o:a:b:c:e:m:f:i option
do
case ${option} in
x)
x0=$OPTARG
;;
y)
y0=$OPTARG
;;
z)
z0=$OPTARG
;;
w)
width=$OPTARG
;;
h)
height=$OPTARG
;;
o)
obj="$OPTARG.obj"
;;
a)
a=$OPTARG
;;
b)
b=$OPTARG
;;
c)
c=$OPTARG
;;
e)
e=$OPTARG
;;
m)
mtl_alias=$OPTARG
;;
f)
mtl=$OPTARG
;;
i)
reverse=1
;;
# qui n'en a pas
:)
echo "L'option $OPTARG requiert un argument"
echo $USAGE
exit 5
;;
\?)
echo "Option incorrecte... "
echo $USAGE
exit 3
;;
esac
done
# gestion des alias de textures
# L'option mtl_alias
pipe=$(echo $mtl_alias | grep " ")
if [ ${#pipe} -eq 0 ]; then
# possède pas espace
multiple_mtl=0
else
multiple_mtl=1
mtl_front=$(echo $mtl_alias | cut -d " " -f1)
mtl_left=$(echo $mtl_alias | cut -d " " -f2)
mtl_top=$(echo $mtl_alias | cut -d " " -f3)
mtl_right=$(echo $mtl_alias | cut -d " " -f4)
mtl_bottom=$(echo $mtl_alias | cut -d " " -f5)
mtl_back=$(echo $mtl_alias | cut -d " " -f6)
fi
# besoin de rotations ?
if [ $a -ne 0 ] || [ $b -ne 0 ] || [ $c -ne 0 ]; then
needRot=1
else
needRot=0
fi
# Position des points
x1=$x0
y1=$y0
z1=$(echo "scale=2; $z0+$e" | bc -l)
x2=$x0
y2=$(echo "scale=2; $y0+$height" | bc -l)
z2=$z0
x3=$x0
y3=$y2
z3=$z1
x4=$(echo "scale=2; $x0+$width" | bc -l)
y4=$y0
z4=$z0
x5=$x4
y5=$y1
z5=$z1
x6=$x4
y6=$y2
z6=$z4
x7=$x5
y7=$y3
z7=$z5
# Besoin d'une rotation
if [ $needRot -eq 1 ]; then
# convertion des angles en radian
a=$(echo "scale=2; $PI*$a/180" | bc -l)
b=$(echo "scale=2; $PI*$b/180" | bc -l)
c=$(echo "scale=2; $PI*$c/180" | bc -l)
# Matrice de rotation globale
cosa=$(echo "scale=2; c($a)" | bc -l)
sina=$(echo "scale=2; s($a)" | bc -l)
cosb=$(echo "scale=2; c($b)" | bc -l)
sinb=$(echo "scale=2; s($b)" | bc -l)
cosc=$(echo "scale=2; c($c)" | bc -l)
sinc=$(echo "scale=2; s($c)" | bc -l)
MRG_00=$(echo "scale=2; $cosb*$cosc" | bc -l)
MRG_01=$(echo "scale=2; -($cosa)*$sinc+$sina*$sinb*$cosc" | bc -l)
MRG_02=$(echo "scale=2; $sina*$sinc+$cosa*$sinb*$cosc" | bc -l)
MRG_10=$(echo "scale=2; $cosb*$sinc" | bc -l)
MRG_11=$(echo "scale=2; $cosa*$cosc+$sina*$sinb*$sinc" | bc -l)
MRG_12=$(echo "scale=2; -($sina)*$cosc+$cosa*$sinb*$sinc" | bc -l)
MRG_20=$(echo "scale=2; -($sinb)" | bc -l)
MRG_21=$(echo "scale=2; $sina*$cosb" | bc -l)
MRG_22=$(echo "scale=2; $cosa*$cosb" | bc -l)
# Rotation de ses points
rx0=$(echo "scale=2; $x0*$MRG_00 + $y0*$MRG_01 + $z0*$MRG_02" | bc -l)
ry0=$(echo "scale=2; $x0*$MRG_10 + $y0*$MRG_11 + $z0*$MRG_12" | bc -l)
rz0=$(echo "scale=2; $x0*$MRG_20 + $y0*$MRG_21 + $z0*$MRG_22" | bc -l)
rx1=$(echo "scale=2; $x1*$MRG_00 + $y1*$MRG_01 + $z1*$MRG_02" | bc -l)
ry1=$(echo "scale=2; $x1*$MRG_10 + $y1*$MRG_11 + $z1*$MRG_12" | bc -l)
rz1=$(echo "scale=2; $x1*$MRG_20 + $y1*$MRG_21 + $z1*$MRG_22" | bc -l)
rx2=$(echo "scale=2; $x2*$MRG_00 + $y2*$MRG_01 + $z2*$MRG_02" | bc -l)
ry2=$(echo "scale=2; $x2*$MRG_10 + $y2*$MRG_11 + $z2*$MRG_12" | bc -l)
rz2=$(echo "scale=2; $x2*$MRG_20 + $y2*$MRG_21 + $z2*$MRG_22" | bc -l)
rx3=$(echo "scale=2; $x3*$MRG_00 + $y3*$MRG_01 + $z3*$MRG_02" | bc -l)
ry3=$(echo "scale=2; $x3*$MRG_10 + $y3*$MRG_11 + $z3*$MRG_12" | bc -l)
rz3=$(echo "scale=2; $x3*$MRG_20 + $y3*$MRG_21 + $z3*$MRG_22" | bc -l)
rx4=$(echo "scale=2; $x4*$MRG_00 + $y4*$MRG_01 + $z4*$MRG_02" | bc -l)
ry4=$(echo "scale=2; $x4*$MRG_10 + $y4*$MRG_11 + $z4*$MRG_12" | bc -l)
rz4=$(echo "scale=2; $x4*$MRG_20 + $y4*$MRG_21 + $z4*$MRG_22" | bc -l)
rx5=$(echo "scale=2; $x5*$MRG_00 + $y5*$MRG_01 + $z5*$MRG_02" | bc -l)
ry5=$(echo "scale=2; $x5*$MRG_10 + $y5*$MRG_11 + $z5*$MRG_12" | bc -l)
rz5=$(echo "scale=2; $x5*$MRG_20 + $y5*$MRG_21 + $z5*$MRG_22" | bc -l)
rx6=$(echo "scale=2; $x6*$MRG_00 + $y6*$MRG_01 + $z6*$MRG_02" | bc -l)
ry6=$(echo "scale=2; $x6*$MRG_10 + $y6*$MRG_11 + $z6*$MRG_12" | bc -l)
rz6=$(echo "scale=2; $x6*$MRG_20 + $y6*$MRG_21 + $z6*$MRG_22" | bc -l)
rx7=$(echo "scale=2; $x7*$MRG_00 + $y7*$MRG_01 + $z7*$MRG_02" | bc -l)
ry7=$(echo "scale=2; $x7*$MRG_10 + $y7*$MRG_11 + $z7*$MRG_12" | bc -l)
rz7=$(echo "scale=2; $x7*$MRG_20 + $y7*$MRG_21 + $z7*$MRG_22" | bc -l)
fi
#
# Sortie du fichier objet
#
echo "#" > $obj
echo "# $obj" >> $obj
echo "#" >> $obj
echo >> $obj
echo "mtllib "$mtl >> $obj
echo >> $obj
if [ $needRot -eq 1 ]; then
echo "v $rx0 $ry0 $rz0" >> $obj
echo "v $rx1 $ry1 $rz1" >> $obj
echo "v $rx2 $ry2 $rz2" >> $obj
echo "v $rx3 $ry3 $rz3" >> $obj
echo "v $rx4 $ry4 $rz4" >> $obj
echo "v $rx5 $ry5 $rz5" >> $obj
echo "v $rx6 $ry6 $rz6" >> $obj
echo "v $rx7 $ry7 $rz7" >> $obj
else
echo "v $x0 $y0 $z0" >> $obj
echo "v $x1 $y1 $z1" >> $obj
echo "v $x2 $y2 $z2" >> $obj
echo "v $x3 $y3 $z3" >> $obj
echo "v $x4 $y4 $z4" >> $obj
echo "v $x5 $y5 $z5" >> $obj
echo "v $x6 $y6 $z6" >> $obj
echo "v $x7 $y7 $z7" >> $obj
fi
echo >> $obj
if [ $reverse -eq 0 ]; then
echo "vt 0.0 0.0" >> $obj
echo "vt 1.0 0.0" >> $obj
echo "vt 0.0 1.0" >> $obj
echo "vt 1.0 1.0" >> $obj
else
echo "vt 1.0 0.0" >> $obj
echo "vt 0.0 0.0" >> $obj
echo "vt 1.0 1.0" >> $obj
echo "vt 0.0 1.0" >> $obj
fi
echo >> $obj
echo "vn 0.0 0.0 1.0" >> $obj
echo "vn 0.0 0.0 -1.0" >> $obj
echo "vn 0.0 1.0 0.0" >> $obj
echo "vn 0.0 -1.0 0.0" >> $obj
echo "vn 1.0 0.0 0.0" >> $obj
echo "vn -1.0 0.0 0.0" >> $obj
echo >> $obj
if [ $multiple_mtl -eq 1 ];then
echo "usemtl "$mtl_front >> $obj
else
echo "usemtl "$mtl_alias >> $obj
fi
echo >> $obj
echo "f 1/2/2 7/3/2 5/1/2" >> $obj
echo "f 1/2/2 3/4/2 7/3/2" >> $obj
if [ $multiple_mtl -eq 1 ];then
echo >> $obj
echo "usemtl "$mtl_left >> $obj
echo >> $obj
fi
echo "f 1/1/6 4/4/6 3/3/6" >> $obj
echo "f 1/1/6 2/2/6 4/4/6" >> $obj
if [ $multiple_mtl -eq 1 ];then
echo >> $obj
echo "usemtl "$mtl_top >> $obj
echo >> $obj
fi
echo "f 3/3/3 8/2/3 7/4/3" >> $obj
echo "f 3/3/3 4/1/3 8/2/3" >> $obj
if [ $multiple_mtl -eq 1 ];then
echo >> $obj
echo "usemtl "$mtl_right >> $obj
echo >> $obj
fi
echo "f 5/2/5 7/4/5 8/3/5" >> $obj
echo "f 5/2/5 8/3/5 6/1/5" >> $obj
if [ $multiple_mtl -eq 1 ];then
echo >> $obj
echo "usemtl "$mtl_bottom >> $obj
echo >> $obj
fi
echo "f 1/3/4 5/4/4 6/2/4" >> $obj
echo "f 1/3/4 6/2/4 2/1/4" >> $obj
if [ $multiple_mtl -eq 1 ];then
echo >> $obj
echo "usemtl "$mtl_back >> $obj
echo >> $obj
fi
echo "f 2/1/1 6/2/1 8/4/1" >> $obj
echo "f 2/1/1 8/4/1 4/3/1" >> $obj
exit 0 |
