#NEWLINE# def append( self , a , b , c , d , tx , ty ) : #NEWLINE# #INDENT# a1 = self . a #NEWLINE# b1 = self . b #NEWLINE# c1 = self . c #NEWLINE# d1 = self . d #NEWLINE# self . a = ( ( a * a1 ) + ( b * c1 ) ) #NEWLINE# self . b = ( ( a * b1 ) + ( b * d1 ) ) #NEWLINE# self . c = ( ( c * a1 ) + ( d * c1 ) ) #NEWLINE# self . d = ( ( c * b1 ) + ( d * d1 ) ) #NEWLINE# self . tx = ( ( ( tx * a1 ) + ( ty * c1 ) ) + self . tx ) #NEWLINE# self . ty = ( ( ( tx * b1 ) + ( ty * d1 ) ) + self . ty )