def iscollinear(self, other):
"""Check if another vector is collinear
Two vectors are collinear if they have parallel or antiparallel
"""
from skhep.math.numeric import isequal
return isequal(abs(self.cosdelta(other)), 1)
def islightlike(self):
"""Check if Lorentz Vector is light-like."""
from skhep.math.numeric import isequal
return isequal(self.mag2, 0.)
def isantiparallel(self, other):
"""Check if another vector is antiparallel.
Two vectors are antiparallel if they have opposite direction but not necessarily the same magnitude.
"""
from skhep.math.numeric import isequal
return isequal(self.cosdelta(other), -1)
def istimelike(self):
"""Check if Lorentz Vector is time-like."""
from skhep.math.numeric import isequal
return self.mag2 > 0. and not isequal(self.mag2, 0.)