def __rmul__(self, other):
"""
x.__rmul__(y) <==> y*x
"""
res = super(ProjectivePoint, self).__rmul__(other)
if res.is_zero(self._tol):
msg = 'you have left projective space'
raise ExitSpaceError(msg)
def __init__(self, coordinates, tol=TOL*10):
super(ProjectivePoint, self).__init__(coordinates)
if self.is_zero(tol):
corstr = '[' + ' : '.join([str(c) for c in self._coordinates]) + ']'
msg = "{0} is not in projective space".format(corstr)
raise ExitSpaceError(msg)
self._dim = len(self._coordinates) - 1
self._tol = tol
def __setslice__(self, i, j, sequence):
"""
x.__setitem__(y, z) <==> x[y] = z
"""
coordinates = self._coordinates.copy()
super(ProjectivePoint, self).__setslice__(i, j, sequence)
if self.is_zero(self._tol):
self._coordinates = coordinates
msg = 'you have left projective space'
raise ExitSpaceError(msg)
def __truediv__(self, other):
"""
x.__truediv__(y) <==> x/y
"""
res = super(ProjectivePoint, self).__truediv__(other)
if res.is_zero(self._tol):
msg = 'you have left projective space'
raise ExitSpaceError(msg)
return res