Struct Interval 

pub struct Interval { /* private fields */ }

A nonempty closed interval, possibly unbounded in either direction.

In other words, the interval may stretch all the way to positive or negative infinity, but it will always have some nonempty interior.

Implementations

impl Interval

pub const UNIT: Interval

An interval of length 1.0, starting at 0.0 and ending at 1.0.

pub const EVERYWHERE: Interval

An interval which stretches across the entire real line from negative infinity to infinity.

pub const fn new(start: f32, end: f32) -> Result<Interval, InvalidIntervalError>

Create a new Interval with the specified start and end. The interval can be unbounded but cannot be empty (so start must be less than end) and neither endpoint can be NaN; invalid parameters will result in an error.

pub const fn start(self) -> f32

Get the start of this interval.

pub const fn end(self) -> f32

Get the end of this interval.

pub fn intersect( self, other: Interval, ) -> Result<Interval, InvalidIntervalError>

Create an Interval by intersecting this interval with another. Returns an error if the intersection would be empty (hence an invalid interval).

pub const fn length(self) -> f32

Get the length of this interval. Note that the result may be infinite (f32::INFINITY).

pub const fn is_bounded(self) -> bool

Returns true if this interval is bounded — that is, if both its start and end are finite.

Equivalently, an interval is bounded if its length is finite.

pub const fn has_finite_start(self) -> bool

Returns true if this interval has a finite start.

pub const fn has_finite_end(self) -> bool

Returns true if this interval has a finite end.

pub fn contains(self, item: f32) -> bool

Returns true if item is contained in this interval.

pub const fn contains_interval(self, other: Interval) -> bool

Returns true if the other interval is contained in this interval.

This is non-strict: each interval will contain itself.

pub const fn clamp(self, value: f32) -> f32

Clamp the given value to lie within this interval.

pub fn spaced_points( self, points: usize, ) -> Result<impl Iterator<Item = f32>, SpacedPointsError>

Get an iterator over equally-spaced points from this interval in increasing order. If points is 1, the start of this interval is returned. If points is 0, an empty iterator is returned. An error is returned if the interval is unbounded.

Examples found in repository

examples/animation/easing_functions.rs (line 164)

fn display_curves(
    mut gizmos: Gizmos,
    ease_functions: Query<(&EaseFunctionPlot, &Transform, &Children)>,
    mut transforms: Query<&mut Transform, Without<EaseFunctionPlot>>,
    mut ui_text: Single<&mut Text>,
    time: Res<Time>,
) {
    let samples = 100;
    let duration = 2.5;
    let time_margin = 0.5;

    let now = ((time.elapsed_secs() % (duration + time_margin * 2.0) - time_margin) / duration)
        .clamp(0.0, 1.0);

    ui_text.0 = format!("Progress: {now:.2}");

    for (EaseFunctionPlot(function, color), transform, children) in &ease_functions {
        let center = transform.translation.xy();
        let half_size = PLOT_SIZE / 2.0;

        // Draw a box around the curve
        gizmos.linestrip_2d(
            [
                center + half_size,
                center + half_size * Vec2::new(-1., 1.),
                center + half_size * Vec2::new(-1., -1.),
                center + half_size * Vec2::new(1., -1.),
                center + half_size,
            ],
            color.darker(0.4),
        );

        // Draw the curve
        let f = EasingCurve::new(0.0, 1.0, *function);
        let drawn_curve = f
            .by_ref()
            .graph()
            .map(|(x, y)| center - half_size + Vec2::new(x, y) * PLOT_SIZE);
        gizmos.curve_2d(
            &drawn_curve,
            drawn_curve.domain().spaced_points(samples).unwrap(),
            *color,
        );

        // Show progress along the curve for the current time
        let y = f.sample(now).unwrap() * PLOT_SIZE.y;
        transforms.get_mut(children[0]).unwrap().translation.y = -half_size.y + y;
        transforms.get_mut(children[1]).unwrap().translation =
            -half_size.extend(0.0) + Vec3::new(now * PLOT_SIZE.x, y, 0.0);

        // Show horizontal bar at y value
        gizmos.linestrip_2d(
            [
                center - half_size + Vec2::Y * y,
                center - half_size + Vec2::new(PLOT_SIZE.x, y),
            ],
            color.darker(0.2),
        );
    }
}

Trait Implementations

impl Clone for Interval

fn clone(&self) -> Interval

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Interval

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Interval

fn deserialize<__D>( __deserializer: __D, ) -> Result<Interval, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl FromArg for Interval

type This<'from_arg> = Interval

The type to convert into.

fn from_arg(arg: Arg<'_>) -> Result<<Interval as FromArg>::This<'_>, ArgError>

Creates an item from an argument.

impl FromReflect for Interval

fn from_reflect(reflect: &(dyn PartialReflect + 'static)) -> Option<Interval>

Constructs a concrete instance of Self from a reflected value.

fn take_from_reflect( reflect: Box<dyn PartialReflect>, ) -> Result<Self, Box<dyn PartialReflect>>

Attempts to downcast the given value to Self using, constructing the value using from_reflect if that fails.

impl GetOwnership for Interval

fn ownership() -> Ownership

Returns the ownership of Self.

impl GetTypeRegistration for Interval

fn get_type_registration() -> TypeRegistration

Returns the default TypeRegistration for this type.

fn register_type_dependencies(registry: &mut TypeRegistry)

Registers other types needed by this type.

impl IntoReturn for Interval

fn into_return<'into_return>(self) -> Return<'into_return>

where Interval: 'into_return,

Converts Self into a Return value.

impl PartialEq for Interval

fn eq(&self, other: &Interval) -> 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 PartialOrd for Interval

fn partial_cmp(&self, other: &Interval) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl PartialReflect for Interval

fn get_represented_type_info(&self) -> Option<&'static TypeInfo>

Returns the TypeInfo of the type represented by this value.

fn try_apply( &mut self, value: &(dyn PartialReflect + 'static), ) -> Result<(), ApplyError>

Tries to apply a reflected value to this value.

fn reflect_kind(&self) -> ReflectKind

Returns a zero-sized enumeration of “kinds” of type.

fn reflect_ref(&self) -> ReflectRef<'_>

Returns an immutable enumeration of “kinds” of type.

fn reflect_mut(&mut self) -> ReflectMut<'_>

Returns a mutable enumeration of “kinds” of type.

fn reflect_owned(self: Box<Interval>) -> ReflectOwned

Returns an owned enumeration of “kinds” of type.

fn try_into_reflect( self: Box<Interval>, ) -> Result<Box<dyn Reflect>, Box<dyn PartialReflect>>

Attempts to cast this type to a boxed, fully-reflected value.

fn try_as_reflect(&self) -> Option<&(dyn Reflect + 'static)>

Attempts to cast this type to a fully-reflected value.

fn try_as_reflect_mut(&mut self) -> Option<&mut (dyn Reflect + 'static)>

Attempts to cast this type to a mutable, fully-reflected value.

fn into_partial_reflect(self: Box<Interval>) -> Box<dyn PartialReflect>

Casts this type to a boxed, reflected value.

fn as_partial_reflect(&self) -> &(dyn PartialReflect + 'static)

Casts this type to a reflected value.

fn as_partial_reflect_mut(&mut self) -> &mut (dyn PartialReflect + 'static)

Casts this type to a mutable, reflected value.

fn reflect_partial_eq( &self, value: &(dyn PartialReflect + 'static), ) -> Option<bool>

Returns a “partial equality” comparison result.

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

Debug formatter for the value.

fn reflect_clone(&self) -> Result<Box<dyn Reflect>, ReflectCloneError>

Attempts to clone Self using reflection.

fn apply(&mut self, value: &(dyn PartialReflect + 'static))

Applies a reflected value to this value.

fn to_dynamic(&self) -> Box<dyn PartialReflect>

Converts this reflected value into its dynamic representation based on its kind.

fn reflect_clone_and_take<T>(&self) -> Result<T, ReflectCloneError>

where T: 'static, Self: Sized + TypePath,

For a type implementing PartialReflect, combines reflect_clone and take in a useful fashion, automatically constructing an appropriate ReflectCloneError if the downcast fails.

fn reflect_hash(&self) -> Option<u64>

Returns a hash of the value (which includes the type).

fn is_dynamic(&self) -> bool

Indicates whether or not this type is a dynamic type.

impl Reflect for Interval

fn into_any(self: Box<Interval>) -> Box<dyn Any>

Returns the value as a Box<dyn Any>.

fn as_any(&self) -> &(dyn Any + 'static)

Returns the value as a &dyn Any.

fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

Returns the value as a &mut dyn Any.

fn into_reflect(self: Box<Interval>) -> Box<dyn Reflect>

Casts this type to a boxed, fully-reflected value.

fn as_reflect(&self) -> &(dyn Reflect + 'static)

Casts this type to a fully-reflected value.

fn as_reflect_mut(&mut self) -> &mut (dyn Reflect + 'static)

Casts this type to a mutable, fully-reflected value.

fn set(&mut self, value: Box<dyn Reflect>) -> Result<(), Box<dyn Reflect>>

Performs a type-checked assignment of a reflected value to this value.

impl Serialize for Interval

fn serialize<__S>( &self, __serializer: __S, ) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Struct for Interval

fn field(&self, name: &str) -> Option<&(dyn PartialReflect + 'static)>

Returns a reference to the value of the field named name as a &dyn PartialReflect.

fn field_mut( &mut self, name: &str, ) -> Option<&mut (dyn PartialReflect + 'static)>

Returns a mutable reference to the value of the field named name as a &mut dyn PartialReflect.

fn field_at(&self, index: usize) -> Option<&(dyn PartialReflect + 'static)>

Returns a reference to the value of the field with index index as a &dyn PartialReflect.

fn field_at_mut( &mut self, index: usize, ) -> Option<&mut (dyn PartialReflect + 'static)>

Returns a mutable reference to the value of the field with index index as a &mut dyn PartialReflect.

fn name_at(&self, index: usize) -> Option<&str>

Returns the name of the field with index index.

fn field_len(&self) -> usize

Returns the number of fields in the struct.

fn iter_fields(&self) -> FieldIter<'_>

Returns an iterator over the values of the reflectable fields for this struct.

fn to_dynamic_struct(&self) -> DynamicStruct

Creates a new DynamicStruct from this struct.

fn get_represented_struct_info(&self) -> Option<&'static StructInfo>

Will return None if TypeInfo is not available.

impl TryFrom<RangeInclusive<f32>> for Interval

type Error = InvalidIntervalError

The type returned in the event of a conversion error.

fn try_from( range: RangeInclusive<f32>, ) -> Result<Interval, <Interval as TryFrom<RangeInclusive<f32>>>::Error>

Performs the conversion.

impl TypePath for Interval

fn type_path() -> &'static str

Returns the fully qualified path of the underlying type.

fn short_type_path() -> &'static str

Returns a short, pretty-print enabled path to the type.

fn type_ident() -> Option<&'static str>

Returns the name of the type, or None if it is anonymous.

fn crate_name() -> Option<&'static str>

Returns the name of the crate the type is in, or None if it is anonymous.

fn module_path() -> Option<&'static str>

Returns the path to the module the type is in, or None if it is anonymous.

impl Typed for Interval

fn type_info() -> &'static TypeInfo

Returns the compile-time info for the underlying type.

impl Copy for Interval

impl StructuralPartialEq for Interval