def test_bump(self):
"""2 vertices that bump into each other half way"""
u = KineticVertex()
u.origin = (0., 0.)
u.velocity = (1., 1.)
v = KineticVertex()
v.origin = (10., 10.)
v.velocity = (-1., -1.)
time = collapse_time_edge(u, v)
assert time is not None
dist = u.distance2_at(v, time)
assert near_zero(dist)
def test_crossing(self):
"""2 vertices crossing each other"""
u = KineticVertex()
u.origin = (0., 0.)
u.velocity = (1., 1.)
v = KineticVertex()
v.origin = (10., 0.)
v.velocity = (-1., 1.)
time = collapse_time_edge(u, v)
# with open("/tmp/cpa.csv","w") as fh:
# for i, inc in enumerate(range(100, 150), start=1):
# val = inc / 1000.
# u.position_at(val)
# v.position_at(val)
# print >>fh, val,";", sqrt(u.distance2_at(v, val))
dist = u.distance2_at(v, time)
assert near_zero(dist)