Struct TransitionManager 

pub struct TransitionManager {
    pub tag: String,
    pub stats: TransitionStats,
    /* private fields */
}

Manages screen-to-screen visual transitions.

The game loop should:

1. Call start() to begin a transition
2. Call tick(dt) each frame
3. Check should_swap_state() to know when to swap game state
4. Call acknowledge_swap() after swapping
5. Call render_overlay() to get the overlay for rendering
6. Check is_done() to know when the transition is complete

Fields

tag: String

Callback tag for identifying which transition this is.

stats: TransitionStats

Per-frame stats.

Implementations

impl TransitionManager

pub fn new() -> Self

pub fn start(&mut self, transition: TransitionType)

Start a new transition. Any in-progress transition is immediately replaced.

pub fn start_tagged( &mut self, transition: TransitionType, tag: impl Into<String>, )

Start a transition with a tag for identification.

pub fn start_with_easing( &mut self, transition: TransitionType, easing: TransitionEasing, )

Start a transition with custom easing.

pub fn capture_screen(&mut self, width: u32, height: u32, time: f32)

Capture the current screen for cross-fade transitions.

pub fn tick(&mut self, dt: f32)

Advance the transition by dt seconds.

pub fn should_swap_state(&self) -> bool

Whether the game should swap state now.

pub fn acknowledge_swap(&mut self)

Call after swapping game state to continue the fade-in phase.

pub fn is_done(&self) -> bool

Whether the transition has fully completed.

pub fn is_active(&self) -> bool

Whether any transition is currently active (not None and not Completed).

pub fn state(&self) -> TransitionState

Current transition state.

pub fn progress(&self) -> f32

Current progress (0.0 to 1.0).

pub fn clear(&mut self)

Reset to no transition.

pub fn render_overlay( &self, _screen_w: f32, _screen_h: f32, ) -> TransitionOverlay

Compute the overlay parameters for the current frame.

The renderer uses this to draw the transition effect on top of the scene.

Trait Implementations

impl Default for TransitionManager

fn default() -> Self

Returns the “default value” for a type.