for j in range(nbCols):
#logging.debug("point[%s,%s] = (%s, %s, %s)",i,j,amat[i,j,0], amat[i,j,1], amat[i,j,2])
if len(rupY) > 0 : # pas de transposition
for j in range(nbCols):
#logging.debug("point[%s,%s] = (%s, %s, %s)",i,j,amat[i,j,0], amat[i,j,1], amat[i,j,2])
if len(rupY) > 0 : # pas de transposition