def value(self,t):
assert t <= self.t(self._it+self._tail_length)
assert t >= self.t(self._it-self._tail_length)
it = self.it(t)
r = t/self._interval - it
slot = self.slot(it)
return colour_tools.blend_colours(self._history[slot],
self._history[(slot+1)%self._length],
r, True)
def blend_colourisations(self,col1,col2,r):
for va, rcol1,rcol2 in zip(self.rings,col1,col2):
for v,col1,col2 in zip(va,rcol1,rcol2):
v.color = colour_tools.blend_colours(col1,col2,r)
