25 lines
683 B
Python
25 lines
683 B
Python
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class Point(tuple):
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def __new__(cls, x, y):
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return tuple.__new__(cls, (y, x))
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def __getattr__(self, name):
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if name == "x":
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return self[1]
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elif name == 'y':
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return self[0]
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else:
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raise AttributeError
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def __repr__(self):
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return '<Point(%d, %d)>' % (self[1], self[0])
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def xy(self):
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return (self[1], self[0])
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def add(self, x, y):
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assert x >= 0, y >= 0
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return Point(self[1] + x, self[0] + y)
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def vadd(self, x, y):
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assert x >= 0, y >= 0
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if y > 0:
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return Point(x, self[0] + y)
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else:
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return Point(self[1] + x, self[0])
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