Source code for dragonfly_energy.des.junction

# coding=utf-8
"""Thermal junction in a District Energy System (DES)."""
from __future__ import division

from .._base import _GeometryBase

from ladybug_geometry.geometry2d.pointvector import Point2D
from honeybee.typing import valid_ep_string
from dragonfly.projection import polygon_to_lon_lat

[docs]class ThermalJunction(_GeometryBase): """Represents an thermal junction connecting two objects in a DES. Args: identifier: Text string for a unique thermal junction ID. Must contain only characters that are acceptable in a DED. This will be used to identify the object across the exported geoJSON and DES files. geometry: A LineSegment2D or Polyline2D representing the geometry of the thermal junction. system_identifier: An optional text string for the identifier of a district system object associated with the junction. District system objects include Ground Heat Exchangers. (Default: None). building_identifier: An optional text string for the identifier of a Building object associated with the junction. (Default: None). Properties: * identifier * display_name * geometry * system_identifier * building_identifier """ __slots__ = ('_system_identifier', '_building_identifier') def __init__(self, identifier, geometry, system_identifier=None, building_identifier=None): """Initialize ThermalJunction.""" _GeometryBase.__init__(self, identifier) # process the identifier assert isinstance(geometry, Point2D), 'Expected ladybug_geometry ' \ 'Point2D for ThermalJunction. Got {}'.format(type(geometry)) self._geometry = geometry self.system_identifier = system_identifier self.building_identifier = building_identifier @property def geometry(self): """Get a Point2D representing the ThermalJunction.""" return self._geometry @property def system_identifier(self): """Get or set a text string for the ID of a Transformer or Substation.""" return self._system_identifier @system_identifier.setter def system_identifier(self, value): self._system_identifier = valid_ep_string(value, 'system_identifier') \ if value is not None else None @property def building_identifier(self): """Get or set a text string for the ID of a dragonfly Building.""" return self._building_identifier @building_identifier.setter def building_identifier(self, value): self._building_identifier = valid_ep_string(value, 'building_identifier') \ if value is not None else None
[docs] def to_geojson_dict(self, origin_lon_lat, conversion_factors): """Get an ThermalJunction dictionary as it appears in an URBANopt geoJSON. Args: origin_lon_lat: An array of two numbers in degrees. The first value represents the longitude of the scene origin in degrees (between -180 and +180). The second value represents latitude of the scene origin in degrees (between -90 and +90). Note that the "scene origin" is the (0, 0) coordinate in the 2D space of the input polygon. conversion_factors: A tuple with two values used to translate between meters and longitude, latitude. """ pt = (self.geometry.x, self.geometry.y) coord = polygon_to_lon_lat([pt], origin_lon_lat, conversion_factors)[0] geo_dict = { 'type': 'Feature', 'properties': { 'id': self.identifier, 'type': 'ThermalJunction', 'junction_type': 'DES', 'connection_type': 'Series' }, 'geometry': { 'type': 'Point', 'coordinates': coord } } if self._system_identifier is not None: geo_dict['properties']['DSId'] = self._system_identifier if self._building_identifier is not None: geo_dict['properties']['buildingId'] = self._building_identifier return geo_dict
def __copy__(self): new_jct = ThermalJunction( self.identifier, self.geometry, self._system_identifier, self._building_identifier) new_jct._display_name = self._display_name return new_jct def __repr__(self): return 'ThermalJunction: {}'.format(self.display_name)