Add degree properties and dup.
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385119d93c
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@ -28,10 +28,33 @@ def rad_to_compass(rad):
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return compass[int(8 * rad / pi + 0.5) % 16]
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class degreeattr(object):
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def __init__(self, attr):
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self.attr = attr
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def __get__(self, obj, type=None):
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return 180.0 * getattr(obj, self.attr) / pi
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def __set__(self, obj, value):
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setattr(obj, self.attr, pi * value / 180.0)
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class degreemethod(object):
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def __new__(cls, f):
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def deg_f(*args, **kwargs):
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return 180.0 * f(*args, **kwargs) / pi
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return deg_f
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class Coord(object):
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__slots__ = ('lat', 'lon', 'ele', 'dt')
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lat_deg = degreeattr('lat')
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lon_deg = degreeattr('lon')
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def __init__(self, lat, lon, ele, dt=None):
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self.lat = lat
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self.lon = lon
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@ -42,6 +65,9 @@ class Coord(object):
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def deg(cls, lat, lon, ele, dt=None):
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return cls(pi * lat / 180.0, pi * lon / 180.0, ele, dt)
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def dup(self):
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return Coord(self.lat, self.lon, self.ele, self.dt)
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def initial_bearing_to(self, other):
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"""Return the initial bearing from self to other."""
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y = sin(other.lon - self.lon) * cos(other.lat)
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@ -49,6 +75,8 @@ class Coord(object):
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- sin(self.lat) * cos(other.lat) * cos(other.lon - self.lon)
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return atan2(y, x)
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initial_bearing_to_deg = degreemethod(initial_bearing_to)
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def distance_to(self, other):
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"""Return the distance from self to other."""
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d = sin(self.lat) * sin(other.lat) \
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