crossfade

Function

crossfade(
    s_out: State,
    s_in: State,
    at: float,
    dur: float,
    easing: Optional[Dict[str, Callable[[float], float]]] = None
) -> Tuple[List[KeyState], List[KeyState]]

Crossfade between two elements (one fading out, one fading in).

Returns two keystate lists for two separate VElements.

Parameters

s_out: State of the outgoing element (will fade to opacity 0)
s_in: State of the incoming element (will fade from opacity 0)
at: Start time of the crossfade
dur: Duration of the crossfade
easing: Optional easing dict for opacity transitions

Returns

Tuple of (out_keystates, in_keystates)

Examples

out_ks, in_ks = crossfade(circle1, circle2, at=0.3, dur=0.2)
    elem_out = VElement().segment(out_ks)
    elem_in = VElement().segment(in_ks)