#==============================================================================
#
# Project:   SharpImage
# Module:    ChamferDistance.py
# Language:  IronPython
# Author:    Dan Mueller
# Date:      $Date: 2007-07-06 10:57:00 +1000 (Fri, 06 Jul 2007) $
# Revision:  $Revision: 2 $
#
# Copyright (c) Queensland University of Technology (QUT) 2007.
# All rights reserved.
#
# This software is distributed WITHOUT ANY WARRANTY; without even
# the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
# PURPOSE.  See the above copyright notices for more information.
#
#==============================================================================

# Import the base script class
import ImageToImageScript
from ImageToImageScript import *

# Add reference and import Topology library
clr.AddReference("ManagedITK.Image.Topology")
from itk import *

class ChamferDistanceScript(ImageToImageScriptObject):
    # -------------------------------------------------------------------------
    Name = "ChamferDistance"
    Help = """Computes the the chamfer distance."""
    Parameters = """(bool) InsideObject = sets if the distance is inside or outside the object. (True)"""
    InsideObject = True
    # -------------------------------------------------------------------------

    def ThreadedDoWork(self):
        """ Perform the main functions of the script. """
        """ NOTE: This function is invoked on a background thread. """
        try:
            self.StartedWork()
            self.WriteInputName()
            filterDistance = itkChamferDistanceTransformImageFilter.New( self.Input, self.Output )
            self.AddEventHandlersToProcessObject( filterDistance )
            filterDistance.SetInput( self.Input )
            filterDistance.DistanceFromObject = not self.InsideObject
            self.WriteLineToConsole( "InsideObject=" + self.InsideObject.ToString() )
            filterDistance.SetWeight(0, itkPixel(self.Output.PixelType, 3) )
            filterDistance.SetWeight(1, itkPixel(self.Output.PixelType, 4) )
            if (self.Input.Dimension == 3):
                filterDistance.SetWeight(2, itkPixel(self.Output.PixelType, 5) )
            filterDistance.UpdateLargestPossibleRegion()
            filterDistance.GetOutput( self.Output )
            self.DisconnectInputAndOutput()
            self.DisposeOfObject( filterDistance )
            self.WriteOutputName()
            self.FinishedWork( True )
            
        except Exception, ex:
            self.HandleException( ex )
            self.FinishedWork( False )
            self.Finalise( )