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Trace

tilo_app::motion

Struct Trace 

pub struct Trace;
Expand description

A mark a collaborator just left (the run a peer typed) going on its own: whole when made, it steps down evenly over Self::LIFE in Self::STEPS steps, each step a wake deadline, so a typing window repaints a few times a second rather than at every refresh.

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impl Trace

pub const LIFE: Duration

How long a mark shows, its taper included.

pub const STEPS: u32 = 10

How many steps it tapers in.

pub fn step(age: Duration) -> Option<u32>

Which step a mark age old is in; None once it has gone.

pub fn alpha(age: Duration) -> Option<f32>

The opacity of a mark age old, step by step; None once it has gone.

pub fn next_step(born: Instant, now: Instant) -> Option<Instant>

When a mark made at born leaves the step it is in at now; None once it has gone.

Auto Trait Implementations§

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impl Freeze for Trace

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impl RefUnwindSafe for Trace

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impl Send for Trace

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impl Sync for Trace

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impl Unpin for Trace

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impl UnsafeUnpin for Trace

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impl UnwindSafe for Trace

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Convert Box<dyn Trait> (where Trait: Downcast) to Box<dyn Any>. Box<dyn Any> can then be further downcast into Box<ConcreteType> where ConcreteType implements Trait.
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