def bezier_to_sbasis(handles, order):
if (order == 0):
return l2s(py2geom.Linear(handles[0]))
elif (order == 1):
return l2s(py2geom.Linear(handles[0], handles[1]))
else:
return (
py2geom.multiply(OmX, bezier_to_sbasis(handles[:-1], order - 1)) +
py2geom.multiply(X, bezier_to_sbasis(handles[1:], order - 1)))
def constant(l):
pws = py2geom.PiecewiseSBasis()
pws.push_cut(0)
pws.push_seg(l2s(py2geom.Linear(l, l)))
pws.push_cut(1000)
return pws
pwsb = PiecewiseSBasis()
pwsb.push_seg(sb)
pwsb.push_cut(0)
pwsb.push_cut(1)
print pwsb.size()
print "invariants:", pwsb.invariants()
print pwsb(0)
def l2s(l):
sb = py2geom.SBasis()
sb.append(l)
return sb
X = l2s(py2geom.Linear(0, 1))
OmX = l2s(py2geom.Linear(1, 0))
def bezier_to_sbasis(handles, order):
print "b2s:", handles, order
if (order == 0):
return l2s(py2geom.Linear(handles[0]))
elif (order == 1):
return l2s(py2geom.Linear(handles[0], handles[1]))
else:
return (
py2geom.multiply(OmX, bezier_to_sbasis(handles[:-1], order - 1)) +
py2geom.multiply(X, bezier_to_sbasis(handles[1:], order - 1)))