Source code for honeybee_energy.properties.shademesh
# coding=utf-8
"""Shade Energy Properties."""
from honeybee.typing import clean_rad_string
from honeybee.checkdup import is_equivalent
from ..construction.shade import ShadeConstruction
from ..schedule.ruleset import ScheduleRuleset
from ..schedule.fixedinterval import ScheduleFixedInterval
from ..lib.constructions import generic_context
from ..lib.constructionsets import generic_construction_set
[docs]class ShadeMeshEnergyProperties(object):
"""Energy Properties for Honeybee ShadeMesh.
Args:
host: A honeybee_core ShadeMesh object that hosts these properties.
construction: An optional ShadeConstruction object to set the reflectance
and specularity of the Shade. If None, it will be a generic context
construction that is completely diffuse with 0.2 visible and solar
reflectance. Unless it is building attached, in which case it will be
set by the default generic ConstructionSet.
transmittance_schedule: An optional schedule to set the transmittance
of the shade, which can vary throughout the day or year. Default
is None for a completely opaque object.
Properties:
* host
* construction
* transmittance_schedule
* is_construction_set_on_object
"""
__slots__ = ('_host', '_construction', '_transmittance_schedule')
def __init__(self, host, construction=None, transmittance_schedule=None):
"""Initialize ShadeMesh energy properties."""
self._host = host
self.construction = construction
self.transmittance_schedule = transmittance_schedule
@property
def host(self):
"""Get the ShadeMesh object hosting these properties."""
return self._host
@property
def construction(self):
"""Get or set a ShadeConstruction for the shade mesh object.
If the construction is not set on the shade-level, then it will be the
generic context construction or the generic exterior shade construction
if it is not detached.
"""
if self._construction: # set by user
return self._construction
return generic_context if self._host.is_detached else \
generic_construction_set.shade_construction
@construction.setter
def construction(self, value):
if value is not None:
assert isinstance(value, ShadeConstruction), \
'Expected ShadeConstruction. Got {}.'.format(type(value))
value.lock() # lock editing in case construction has multiple references
self._construction = value
@property
def transmittance_schedule(self):
"""Get or set the transmittance schedule of the shade."""
return self._transmittance_schedule
@transmittance_schedule.setter
def transmittance_schedule(self, value):
if value is not None:
assert isinstance(value, (ScheduleRuleset, ScheduleFixedInterval)), \
'Expected schedule for shade mesh transmittance schedule. ' \
'Got {}.'.format(type(value))
if value.schedule_type_limit is not None:
assert value.schedule_type_limit.unit == 'fraction', 'Transmittance ' \
'schedule should be fractional [Dimensionless]. Got a schedule ' \
'of unit_type [{}].'.format(value.schedule_type_limit.unit_type)
value.lock() # lock editing in case schedule has multiple references
self._transmittance_schedule = value
@property
def is_construction_set_on_object(self):
"""Boolean noting if construction is assigned on the level of this Shade.
This is opposed to having the construction assigned by a ConstructionSet.
"""
return self._construction is not None
[docs] def reset_construction_to_set(self):
"""Reset the construction and transmittance schedule of this Shade to default.
This means that the Shade's construction will be assigned by a ConstructionSet.
"""
self._construction = None
self._transmittance_schedule = None
[docs] def radiance_modifier_solar(self):
"""Get a Radiance modifier that combines the construction and transmittance.
Note that only the first value from the transmittance schedule will be used
to create the Trans modifier and so this method is really only intended for
cases of constant transmittance schedules. If there is no transmittance
schedule, a plastic material will be returned.
"""
return self._radiance_modifier(self.construction.solar_reflectance)
[docs] def radiance_modifier_visible(self):
"""Get a Radiance modifier that combines the construction and transmittance.
Note that only the first value from the transmittance schedule will be used
to create the Trans modifier and so this method is really only intended for
cases of constant transmittance schedules. If there is no transmittance
schedule, a plastic material will be returned.
"""
return self._radiance_modifier(self.construction.visible_reflectance)
[docs] @classmethod
def from_dict(cls, data, host):
"""Create ShadeMeshEnergyProperties from a dictionary.
Note that the dictionary must be a non-abridged version for this
classmethod to work.
Args:
data: A dictionary representation of ShadeMeshEnergyProperties with the
format below.
host: A Shade object that hosts these properties.
.. code-block:: python
{
"type": 'ShadeMeshEnergyProperties',
"construction": {}, # A ShadeConstruction dictionary
"transmittance_schedule": {} # A transmittance schedule dictionary
}
"""
assert data['type'] == 'ShadeMeshEnergyProperties', \
'Expected ShadeMeshEnergyProperties. Got {}.'.format(data['type'])
new_prop = cls(host)
if 'construction' in data and data['construction'] is not None:
new_prop.construction = ShadeConstruction.from_dict(data['construction'])
if 'transmittance_schedule' in data and \
data['transmittance_schedule'] is not None:
sch_dict = data['transmittance_schedule']
if sch_dict['type'] == 'ScheduleRuleset':
new_prop.transmittance_schedule = \
ScheduleRuleset.from_dict(data['transmittance_schedule'])
elif sch_dict['type'] == 'ScheduleFixedInterval':
new_prop.transmittance_schedule = \
ScheduleFixedInterval.from_dict(data['transmittance_schedule'])
else:
raise ValueError(
'Expected non-abridged Schedule dictionary for Shade '
'transmittance_schedule. Got {}.'.format(sch_dict['type']))
return new_prop
[docs] def apply_properties_from_dict(self, abridged_data, constructions, schedules):
"""Apply properties from a ShadeMeshEnergyPropertiesAbridged dictionary.
Args:
abridged_data: A ShadeMeshEnergyPropertiesAbridged dictionary (typically
coming from a Model).
constructions: A dictionary of constructions with constructions identifiers
as keys, which will be used to re-assign constructions.
schedules: A dictionary of schedules with schedule identifiers as keys,
which will be used to re-assign schedules.
"""
if 'construction' in abridged_data and abridged_data['construction'] is not None:
try:
self.construction = constructions[abridged_data['construction']]
except KeyError:
raise ValueError('Shade construction "{}" was not found in '
'constructions.'.format(abridged_data['construction']))
if 'transmittance_schedule' in abridged_data and \
abridged_data['transmittance_schedule'] is not None:
self.transmittance_schedule = \
schedules[abridged_data['transmittance_schedule']]
[docs] def to_dict(self, abridged=False):
"""Return energy properties as a dictionary.
Args:
abridged: Boolean to note whether the full dictionary describing the
object should be returned (False) or just an abridged version (True).
Default: False.
"""
base = {'energy': {}}
base['energy']['type'] = 'ShadeMeshEnergyProperties' if not \
abridged else 'ShadeMeshEnergyPropertiesAbridged'
if self._construction is not None:
base['energy']['construction'] = \
self._construction.identifier if abridged else \
self._construction.to_dict()
if self.transmittance_schedule is not None:
base['energy']['transmittance_schedule'] = \
self.transmittance_schedule.identifier if abridged else \
self.transmittance_schedule.to_dict()
return base
[docs] def duplicate(self, new_host=None):
"""Get a copy of this object.
Args:
new_host: A new Shade object that hosts these properties.
If None, the properties will be duplicated with the same host.
"""
_host = new_host or self._host
return ShadeMeshEnergyProperties(
_host, self._construction, self._transmittance_schedule)
[docs] def is_equivalent(self, other):
"""Check to see if these energy properties are equivalent to another object.
This will only be True if all properties match (except for the host) and
will otherwise be False.
"""
if not is_equivalent(self._construction, other._construction):
return False
if not is_equivalent(
self._transmittance_schedule, other._transmittance_schedule):
return False
return True
def _radiance_modifier(self, ref):
"""Get a Radiance modifier that respects the transmittance schedule.
Args:
ref: The reflectance to be used in the modifier.
"""
# check to be sure that the honeybee-radiance installed
try:
from honeybee_radiance.modifier.material import Trans
except ImportError as e:
raise ImportError('honeybee_radiance library must be installed to use '
'Shade radiance_modifier methods. {}'.format(e))
# create the modifier from the properties
if self.transmittance_schedule is None:
return self.construction._to_radiance(ref)
else:
mod_id = '{}_mod'.format(clean_rad_string(self.host.identifier))
if isinstance(self.transmittance_schedule, ScheduleRuleset):
trans = self.transmittance_schedule.default_day_schedule.values[0]
else:
trans = self.transmittance_schedule.values[0]
avg_ref = (1 - trans) * ref
return Trans.from_average_properties(
mod_id, average_reflectance=avg_ref, average_transmittance=trans,
is_specular=self.construction.is_specular, is_diffusing=False)
[docs] def ToString(self):
return self.__repr__()
def __repr__(self):
return 'ShadeMesh Energy Properties: [host: {}]'.format(self.host.display_name)