def __new__(cls, variables, expr):
if not is_Tuple(variables) or len(variables) != 3:
raise TypeError('variables is not a 3-Tuple: %s'%variables)
if not is_Tuple(expr) or len(expr) != 3:
raise TypeError('expr is not a 3-Tuple: %s'%expr)
return Functor.__new__(cls, variables, expr)
def __new__(cls, *paths, **kwargs):
evaluate = kwargs.pop('evaluate', global_evaluate[0])
if any(not isinstance(pth, Path) for pth in paths):
raise TypeError
if len(paths) != 0 and len(set(pth.length for pth in paths)) != 1:
raise ValueError
nres = sum(pth.nres for pth in paths)
if evaluate:
paths = cls.reduce(paths)
if len(paths) == 0:
return IdentityPath(nres)
elif len(paths) == 1:
return paths[0]
else:
return Functor.__new__(cls, *paths)
def __new__(cls, path, start, stop, **kwargs):
evaluate = kwargs.pop('evaluate', global_evaluate[0])
if not isinstance(path, Path):
raise TypeError
stop = sympify(stop) if stop is not None else path.length
start = sympify(start) if start is not None else S.Zero
if (stop not in Interval(0, path.length) or
start not in Interval(0, path.length) or
stop < start):
raise IndexError
if evaluate:
if start == 0 and stop == path.length:
sliced_path = path
elif start == stop:
sliced_path = IdentityPath(path.nres)
else:
sliced_path = path._slice(start, stop)
if sliced_path is not None:
return sliced_path
else:
return Functor.__new__(cls, path, start, stop)
def __new__(cls, tvec=zeros3, rquat=Mat([1,0,0,0]), parity=1):
tvec = Mat(tvec)
rquat = Mat(rquat)
parity = sign(parity)
return Functor.__new__(cls, tvec, rquat, parity)
def __new__(cls, matrix=eye(3), vector=zeros3):
matrix = Mat(matrix)
vector = Mat(vector)
return Functor.__new__(cls, matrix, vector)
def __new__(cls, nres, **kwargs):
return Functor.__new__(cls, sympify(nres))
