question: public static boolean createNormal ( Vector3 norm , ReadOnlyVector3 v0 , ReadOnlyVector3 v1 , ReadOnlyVector3 v2 ) { if ( Double . isNaN ( v0 . getZ ( ) ) || Double . isNaN ( v1 . getZ ( ) ) || Double . isNaN ( v2 . getZ ( ) ) ) { norm . set ( 0 , 0 , 0 ) ; return ( false ) ; } Vector3 work = Vector3 . fetchTempInstance ( ) ; norm . set ( v1 ) ; norm . subtractLocal ( v0 ) ; work . set ( v2 ) ; work . subtractLocal ( v0 ) ; norm . crossLocal ( work ) ; norm . normalizeLocal ( ) ; Vector3 . releaseTempInstance ( work ) ; return ( true ) ; }
target:  Given three points, create the normal for the plane they define.