def test_scalar_mul_sqrt2(self):
a, b, c = (0, 0), (10, -10), (20, 0)
v = bisector_unit(a, b, c)
s = sqrt(2)
m = vector_mul_scalar(v, s)
assert v != m # multiplied vector is not the same as input
assert m[0] == 0 # dx == 0
assert m[1] == s # dy == sqrt(2)
def test_nearly_0degs_right(self):
"""Bisector to the right
"""
bi = bisector_unit((0, 1e-56), (1, 0), (0, 0))
assert bi == (1.0, -5e-57)
def test_nearly_0degs_left(self):
"""Bisector to the left
"""
bi = bisector_unit((0, 0), (1, 0), (0, 1e-56))
assert bi == (-1.0, 5e-57)
def test_45degs0(self):
"""Test "V" points from left to right
"""
bi = bisector_unit((0, 1), (1, 0), (2, 1))
assert bi == (0, 1)
def test_near_0degs(self):
"""Folding back from p0 via p1 to p2
x==x
"""
bi = bisector_unit((0, 0), (1, 0), (0, 0.000001))
assert bi == (-0.999999999999875, 4.999999999998125e-07)
def test_45degs3(self):
"""Test "V" points from top to bottom
"""
bi = bisector_unit((0, 2), (-1, 1), (0, 0))
assert bi == (1, 0)
def test_45degs2(self):
"""Test "V" points from bottom to top
"""
bi = bisector_unit((0, 0), (-1, 1), (0, 2))
assert bi == (-1, 0)
def test_45degs1(self):
"""Test "V" points from right to left
"""
bi = bisector_unit((2, 1), (1, 0), (0, 1))
assert bi == (0, -1)
def test_scalar_mul_one(self):
a, b, c = (0, 0), (10, 0), (20, 0)
v = bisector_unit(a, b, c)
s = 1
assert v == vector_mul_scalar(v, s)