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)