#  This software and supporting documentation are distributed by
#      Institut Federatif de Recherche 49
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from brainvisa.processes import *
import shfjGlobals

name = 'Transformation inverter'
userLevel=1

signature = Signature(
  'transformation', ReadDiskItem( 'Transformation matrix', 'Transformation matrix' ),
  'inverted_transformation', WriteDiskItem( 'Transformation matrix', 'Transformation matrix' ),
)

def initialization( self ):
    def reverseTrans( self, proc ):
      if self.transformation is not None:
        return WriteDiskItem( 'Transformation matrix',
                                'Transformation matrix',
                                requiredAttributes = \
                                { 'from': self.transformation.get( 'to' ),
                                  'to': self.transformation.get( 'from' ) }
                                ).findValue( self.transformation )
      else:
        return None                              
    self.linkParameters( 'inverted_transformation', 'transformation', reverseTrans )

def execution( self, context ):
    context.system( 'AimsInvertTransformation', '-i', self.transformation.fullPath(),
                    '-o', self.inverted_transformation.fullPath() )