Source code for morse.sensors.thermometer

import logging; logger = logging.getLogger("morse." + __name__)
import math
from morse.core import blenderapi
import morse.core.sensor
from morse.helpers.components import add_data

[docs]class Thermometer(morse.core.sensor.Sensor): """ This sensor emulates a Thermometer, measuring the temperature with respect to the distance to heat sources. It defines a default temperature throughout the scenario, which is affected by local fire sources. The temperature rises exponentially when the distance between the sensor and the heat source decreases. The default temperature is specified as a parameter ``Temperature`` of the Scene_Script_Holder Empty object in the simulation file. It is expressed in degrees Celsius. """ _name = "Thermomether Sensor" _short_desc = "Thermomether sensor to detect nearby objects." add_data('temperature', 0.0, "float", "temperature in Celsius") def __init__(self, obj, parent=None): """ Constructor method. Receives the reference to the Blender object. The second parameter should be the name of the object's parent. """ logger.info('%s initialization' % obj.name) # Call the constructor of the parent class super(self.__class__, self).__init__(obj, parent) self._global_temp = 15.0 self._fire_temp = 200.0 # Get the global coordinates of defined in the scene scene = blenderapi.scene() script_empty_name = 'Scene_Script_Holder' script_empty = scene.objects[script_empty_name] self._global_temp = float(script_empty['Temperature']) logger.info('Component initialized')
[docs] def default_action(self): """ Compute the local temperature Temperature is measured dependent on the closest fire source. """ min_distance = 100000.0 fires = False scene = blenderapi.scene() # Look for the fire sources marked so for obj in scene.objects: try: obj['Fire'] fire_radius = obj['Fire_Radius'] # If the direction of the fire is also important, # we can use getVectTo instead of getDistanceTo distance = self.bge_object.getDistanceTo(obj) if distance < min_distance: min_distance = distance fires = True except KeyError as detail: logger.debug("Exception: " + str(detail)) temperature = self._global_temp # Trial and error formula to get a temperature dependant on # distance to the nearest fire source. if fires: temperature += self._fire_temp * math.e ** (-0.2 * min_distance) # Store the data acquired by this sensor that could be sent # via a middleware. self.local_data['temperature'] = float(temperature)