Enum CrossfadeState 

pub enum CrossfadeState {
    Steady,
    InProgress {
        progress: u8,
    },
    Settling,
}

Cross-fade lifecycle state.

Variants

Steady

No swap in progress.

InProgress

New camera’s pipeline is ramping in over the current one. The progress value [0, 1] is the new camera’s alpha.

Fields

progress: u8

0–255 alpha for the incoming camera (255 = fully visible).

Settling

Crossfade completed — drop old pipeline + sprite slot.

Implementations

impl CrossfadeState

pub fn begin(self) -> Self

Begin a crossfade. If already in progress, the current target is replaced with the new target (rapid third-camera click case from the ticket spec).

pub fn tick(self, elapsed: Duration) -> Self

Advance the crossfade by elapsed since the previous tick. Returns Settling when progress reaches 1.0.

pub fn settled(self) -> Self

Mark settling complete — return to steady state.

pub fn is_settling(self) -> bool

true once the crossfade has reached its target alpha.

pub fn incoming_alpha(self) -> u8

Current alpha for the incoming camera (0 in Steady, 255 in Settling). Caller passes this into the wisp scene as the secondary sprite’s alpha multiplier.

Trait Implementations

impl Clone for CrossfadeState

fn clone(&self) -> CrossfadeState

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for CrossfadeState

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for CrossfadeState

fn default() -> CrossfadeState

Returns the “default value” for a type.

impl PartialEq for CrossfadeState

fn eq(&self, other: &CrossfadeState) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for CrossfadeState

impl Eq for CrossfadeState

impl StructuralPartialEq for CrossfadeState