# matrix to position to center
pos_mat = om.MMatrix( [ 
                (1,0,0,0),
                (0,1,0,0),
                (0,0,1,0), 
                (-o.x,-o.y,-o.z,1) ] )  
# matrix to flatten on y
scale_mat = om.MMatrix( [ 
                (1,0,0,0),
                (0,0,0,0),
                (0,0,1,0), 
                (0,0,0,1)] )    

fnmat = ( pos_mat * rot_mat ) * scale_mat# fnmat = pos_mat
for i in xrange( fnm.numVertices ):
        fnm.setPoint( i , fnm.getPoint( i) * fnmat )
        # fnm.getPoint( i) * fnmat.inverse() to reverse does not work / is odd 
looking

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