The current_time variable contains the current time in ParaView's time controls. This is the same value as the "Current Time" field in the ParaView GUI's Information panel. In contrast to the time_value (t_value) variable already defined, which refer to the current time value of the data source, the current_time value refers to the global current time value set for all of ParaView. Unlike time_value and time_index (t_index), the current_time value is always available in the Python Calculator and Python Annotation filters.