[source] création du fichier obj d'un cube

**alain_** · 16/11/2010, 16h13

Voici un script shell qui pourra vous êtres utile un de ces quatre!!
Régalez-vous:

Code :

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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 [ ${#pipe} -eq 0 ]; then
	# possÃ¨de pas espace
	multiple_mtl=0	
else
	multiple_mtl=1
	mtl_front=$(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

[source] création du fichier obj d'un cube

Linux

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