.add_enum_value(INTERPOLATION_CONSTANT,"constant",_("Constant"))
.add_enum_value(INTERPOLATION_HALT,"ease",_("Ease in/out"))
.add_enum_value(INTERPOLATION_LINEAR,"linear",_("Linear"))
.add_enum_value(INTERPOLATION_CONSTANT,"constant",_("Constant"))
.add_enum_value(INTERPOLATION_HALT,"ease",_("Ease in/out"))
.add_enum_value(INTERPOLATION_LINEAR,"linear",_("Linear"))