Struct valence_boss_bar::BossBarHealth

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pub struct BossBarHealth(pub f32);
Expand description

The health of a boss bar.

Tuple Fields§

§0: f32

Methods from Deref<Target = f32>§

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pub const RADIX: u32 = 2u32

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pub const MANTISSA_DIGITS: u32 = 24u32

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pub const DIGITS: u32 = 6u32

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pub const EPSILON: f32 = 1.1920929E-7f32

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pub const MIN: f32 = -3.40282347E+38f32

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pub const MIN_POSITIVE: f32 = 1.17549435E-38f32

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pub const MAX: f32 = 3.40282347E+38f32

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pub const MIN_EXP: i32 = -125i32

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pub const MAX_EXP: i32 = 128i32

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pub const MIN_10_EXP: i32 = -37i32

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pub const MAX_10_EXP: i32 = 38i32

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pub const NAN: f32 = NaN_f32

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pub const INFINITY: f32 = +Inf_f32

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pub const NEG_INFINITY: f32 = -Inf_f32

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pub fn total_cmp(&self, other: &f32) -> Ordering

Return the ordering between self and other.

Unlike the standard partial comparison between floating point numbers, this comparison always produces an ordering in accordance to the totalOrder predicate as defined in the IEEE 754 (2008 revision) floating point standard. The values are ordered in the following sequence:

  • negative quiet NaN
  • negative signaling NaN
  • negative infinity
  • negative numbers
  • negative subnormal numbers
  • negative zero
  • positive zero
  • positive subnormal numbers
  • positive numbers
  • positive infinity
  • positive signaling NaN
  • positive quiet NaN.

The ordering established by this function does not always agree with the PartialOrd and PartialEq implementations of f32. For example, they consider negative and positive zero equal, while total_cmp doesn’t.

The interpretation of the signaling NaN bit follows the definition in the IEEE 754 standard, which may not match the interpretation by some of the older, non-conformant (e.g. MIPS) hardware implementations.

§Example
struct GoodBoy {
    name: String,
    weight: f32,
}

let mut bois = vec![
    GoodBoy { name: "Pucci".to_owned(), weight: 0.1 },
    GoodBoy { name: "Woofer".to_owned(), weight: 99.0 },
    GoodBoy { name: "Yapper".to_owned(), weight: 10.0 },
    GoodBoy { name: "Chonk".to_owned(), weight: f32::INFINITY },
    GoodBoy { name: "Abs. Unit".to_owned(), weight: f32::NAN },
    GoodBoy { name: "Floaty".to_owned(), weight: -5.0 },
];

bois.sort_by(|a, b| a.weight.total_cmp(&b.weight));

// `f32::NAN` could be positive or negative, which will affect the sort order.
if f32::NAN.is_sign_negative() {
    assert!(bois.into_iter().map(|b| b.weight)
        .zip([f32::NAN, -5.0, 0.1, 10.0, 99.0, f32::INFINITY].iter())
        .all(|(a, b)| a.to_bits() == b.to_bits()))
} else {
    assert!(bois.into_iter().map(|b| b.weight)
        .zip([-5.0, 0.1, 10.0, 99.0, f32::INFINITY, f32::NAN].iter())
        .all(|(a, b)| a.to_bits() == b.to_bits()))
}

Trait Implementations§

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impl Component for BossBarHealth
where Self: Send + Sync + 'static,

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const STORAGE_TYPE: StorageType = bevy_ecs::component::StorageType::Table

A constant indicating the storage type used for this component.
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fn register_component_hooks(_hooks: &mut ComponentHooks)

Called when registering this component, allowing mutable access to its [ComponentHooks].
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impl Default for BossBarHealth

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fn default() -> BossBarHealth

Returns the “default value” for a type. Read more
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impl Deref for BossBarHealth

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type Target = f32

The resulting type after dereferencing.
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fn deref(&self) -> &Self::Target

Dereferences the value.
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impl DerefMut for BossBarHealth

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fn deref_mut(&mut self) -> &mut Self::Target

Mutably dereferences the value.

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where T: 'static + ?Sized,

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Gets the TypeId of self. Read more
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where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<C> Bundle for C
where C: Component,

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fn component_ids( components: &mut Components, storages: &mut Storages, ids: &mut impl FnMut(ComponentId), )

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unsafe fn from_components<T, F>(ctx: &mut T, func: &mut F) -> C
where F: for<'a> FnMut(&'a mut T) -> OwningPtr<'a>,

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fn get_component_ids( components: &Components, ids: &mut impl FnMut(Option<ComponentId>), )

Gets this [Bundle]’s component ids. This will be None if the component has not been registered.
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fn get_components(self, func: &mut impl FnMut(StorageType, OwningPtr<'_>))

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Returns the argument unchanged.

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Creates Self using data from the given [World].
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