Convert Wavefront OBJ to JavaScript arrays

README.md

Convert Wavefront OBJ to JavaScript arrays

Naive bash script to convert a Wavefront OBJ (as created by Blender) into JavaScript arrays:

$ ./obj2js < model.obj > model.js

Will print something like:

var vertices = [
1.000000, -1.000000, -1.000000,
1.000000, -1.000000, 1.000000,
-1.000000, -1.000000, 1.000000,
-1.000000, -1.000000, -1.000000,
1.000000, 1.000000, -0.999999,
0.999999, 1.000000, 1.000001,
-1.000000, 1.000000, 1.000000,
-1.000000, 1.000000, -1.000000,
], indicies = [
0, 1, 2,
4, 7, 6,
0, 4, 5,
1, 5, 6,
2, 6, 7,
4, 0, 3,
]

obj2js.sh

#/usr/bin/env bash

FACES=1
echo "var vertices = ["
while read COMMAND A B C
do
	case "$COMMAND" in
		v)
			for N in "$A" "$B" "$C"
			do
				if [ "$N" == '0.000000' ] || [ $N == '-0.000000' ]
				then
					N=0
				fi
				echo -n "$N, "
			done
			echo
			;;
		f)
			(( FACES )) && {
				echo "], indicies = ["
				FACES=0
			}
			for N in "$A" "$B" "$C"
			do
				N=${N%%/*}
				echo -n "$(( N-1 )), "
			done
			echo
			;;
	esac
done
echo "]"