def __init__(
self,
filename=None,
images_dir='./',
image_size=(800, 600),
cache=None,
output_timestep=None,
output_zero_step=True,
output_last_step=True,
draw_ontop='forecast',
**kwargs
):
"""
Init the image renderer.
Following args are passed to base class Outputter's init:
:param cache: sets the cache object from which to read data. The model
will automatically set this param
:param output_timestep: default is None in which case everytime the
write_output is called, output is written. If set, then output is
written every output_timestep starting from model_start_time.
:type output_timestep: timedelta object
:param output_zero_step: default is True. If True then output for
initial step (showing initial release conditions) is written
regardless of output_timestep
:type output_zero_step: boolean
:param output_last_step: default is True. If True then output for
final step is written regardless of output_timestep
:type output_last_step: boolean
:param draw_ontop: draw 'forecast' or 'uncertain' LEs on top. Default
is to draw 'forecast' LEs, which are in black on top
:type draw_ontop: str
Remaining kwargs are passed onto baseclass's __init__ with a direct
call: MapCanvas.__init__(..)
Optional parameters (kwargs)
:param projection_class: gnome.utilities.projections class to use.
Default is gnome.utilities.projections.FlatEarthProjection
:param map_BB: map bounding box. Default is to use
land_polygons.bounding_box. If land_polygons is None, then this is
the whole world, defined by ((-180,-90),(180, 90))
:param viewport: viewport of map -- what gets drawn and on what scale.
Default is to set viewport = map_BB
:param image_mode: Image mode ('P' for palette or 'L' for Black and
White image). BW_MapCanvas inherits from MapCanvas and sets the
mode to 'L'. Default image_mode is 'P'.
:param id: unique identifier for a instance of this class (UUID given
as a string). This is used when loading an object from a persisted
model.
"""
# set up the canvas
self._filename = filename
if filename is not None:
polygons = haz_files.ReadBNA(filename, 'PolygonSet')
else:
polygons = None
Outputter.__init__(self, cache, output_timestep, output_zero_step,
output_last_step)
MapCanvas.__init__(self, image_size, land_polygons=polygons,
**kwargs)
self.images_dir = images_dir
self.last_filename = ''
self.draw_ontop = draw_ontop
