Exemplo 005

exemplo_005.py

import math

class Posicao():

    def __init__(self, lat, lng):
        self.lat, self.lng = lat, lng
        self.geometria = GeometriaPlana()
        self.unidade = UnidadeQuilometro()

    @property
    def lat(self):
      return math.degree(self.phi)

    @lat.setter
    def lat(self, value):
      self.phi = math.radians(value)

    @property
    def phi(self):
       return self._phi

    @phi.setter
    def phi(self, value):
      if not -math.pi / 2 <= value <= math.pi / 2:
        raise ValueError("Latitude inválida")
      self._phi = value

    @property
    def lng(self):
      return math.degree(self.theta)

    @lng.setter
    def lng(self, value):
       self.theta = math.radians(value)

    @property
    def theta(self):
       return self._theta

    @theta.setter
    def theta(self, value):
      if not -math.pi  <= value <= math.pi :
        raise ValueError("Longitude inválida")
      self._theta = value

    def distancia(self, pos):
       dist = self.geometria.distance(self.phi, self.theta, pos.phi, pos.theta)
       return self.unidade.converte(dist)

    def direcao(self, pos):
       return self.geometria.direcao(self.phi, self.theta, pos.phi, pos.theta)