[Closed] matrix question

i am writing a script to distribute a some objects over a deforming mesh (by bend for example) so i wrote that script :

num=getnumverts $root
 for i in 1 to num do 
 (
  b=teapot radius:2 box:true 
   b.transform.controller=transform_script()
 	
   theobj=$root
   b.transform.controller.addnode "obj" theobj
 	txt="snapshotasmesh obj 
"	
 	txt+="thenormal=(getnormal obj "+i as string +")
"
 	txt+="thex=normalize (cross thenormal obj.dir)
"
 	txt+="they=normalize (cross thenormal thex)
"
 	
 	txt+="matrix3 thex they thenormal (getvert obj "+i as string+")
" 
   b.transform.controller.script=txt
 	
 	
 	)

what i surprisingly had was the flipping at some point, i wonder if i can avoid that