21 lines
609 B
Python
21 lines
609 B
Python
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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# Copyright 2019 Hiroshi Murayama <opiopan@gmail.com>
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from math import cos, sin, pi
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def rotate(x, y, angle, center):
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x0 = x - center[0]
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y0 = y - center[1]
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angle = angle * pi / 180.0
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return (cos(angle) * x0 - sin(angle) * y0 + center[0],
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sin(angle) * x0 + cos(angle) * y0 + center[1])
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def is_equal_value(a, b, error_range=0):
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return a - b <= error_range and a - b >= -error_range
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def is_equal_point(a, b, error_range=0):
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return is_equal_value(a[0], b[0], error_range) and \
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is_equal_value(a[1], b[1], error_range)
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