gnome.movers.ship_drift_mover

Ship drift mover

Classes

ShipDriftMover

mover to model ship drift

Module Contents

class gnome.movers.ship_drift_mover.ShipDriftMover(wind_file=None, topology_file=None, grid_type=1, drift_angle=0, time_offset=0, **kwargs)

Bases: gnome.movers.Mover

mover to model ship drift

Parameters:

  • wind_file – file containing wind data on a grid

  • topology_file – Default is None. When exporting topology, it is stored in this file

  • wind_scale – Value to scale wind data

  • extrapolate – Allow current data to be extrapolated before and after file data

  • time_offset – Time zone shift if data is in GMT

Pass optional arguments to base class uses super: super(ShipDriftMover,self).__init__(**kwargs)

wind_file = None
topology_file = None
name

define as property in base class so all objects will have a name by default

drift_angle = 0
grid_type = 1
grid
mover
model_time = 0
positions
delta
status_codes
wind_scale
extrapolate
time_offset
export_topology(topology_file)
Parameters:

topology_file=None – absolute or relative path where topology file will be written.

prepare_for_model_run()

Override this method if a derived mover class needs to perform any actions prior to a model run

prepare_for_model_step(sc, time_step, model_time_datetime)

Call base class method using super Also updates windage for this timestep

Parameters:

  • sc – an instance of gnome.spill_container.SpillContainer class

  • time_step – time step in seconds

  • model_time_datetime – current time of model as a date time object

prepare_data_for_get_move(sc, model_time_datetime)

organizes the spill object into inputs for calling with Cython wrapper’s get_move(…)

Parameters:

  • sc – an instance of gnome.spill_container.SpillContainer class

  • model_time_datetime – current model time as datetime object

get_move(sc, time_step, model_time_datetime)

Override base class functionality because mover has a different get_move signature

Parameters:

  • sc – an instance of the gnome.SpillContainer class

  • time_step – time step in seconds

  • model_time_datetime – current time of the model as a date time object

model_step_is_done(sc=None)

This method gets called by the model after everything else is done in a time step, and is intended to perform any necessary clean-up operations. Subclassed movers can override this method.