Struct bevy::math::prelude::Dir2

pub struct Dir2(/* private fields */);
Expand description

A normalized vector pointing in a direction in 2D space

Implementations§

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impl Dir2

pub const X: Dir2 = _

A unit vector pointing along the positive X axis.

pub const Y: Dir2 = _

A unit vector pointing along the positive Y axis.

pub const NEG_X: Dir2 = _

A unit vector pointing along the negative X axis.

pub const NEG_Y: Dir2 = _

A unit vector pointing along the negative Y axis.

pub const AXES: [Dir2; 2] = _

The directional axes.

pub const NORTH: Dir2 = _

The “north” direction, equivalent to Dir2::Y.

pub const SOUTH: Dir2 = _

The “south” direction, equivalent to Dir2::NEG_Y.

pub const EAST: Dir2 = _

The “east” direction, equivalent to Dir2::X.

pub const WEST: Dir2 = _

The “west” direction, equivalent to Dir2::NEG_X.

pub const NORTH_EAST: Dir2 = _

The “north-east” direction, between Dir2::NORTH and Dir2::EAST.

pub const NORTH_WEST: Dir2 = _

The “north-west” direction, between Dir2::NORTH and Dir2::WEST.

pub const SOUTH_EAST: Dir2 = _

The “south-east” direction, between Dir2::SOUTH and Dir2::EAST.

pub const SOUTH_WEST: Dir2 = _

The “south-west” direction, between Dir2::SOUTH and Dir2::WEST.

pub fn new(value: Vec2) -> Result<Dir2, InvalidDirectionError>

Create a direction from a finite, nonzero Vec2, normalizing it.

Returns Err(InvalidDirectionError) if the length of the given vector is zero (or very close to zero), infinite, or NaN.

pub fn new_unchecked(value: Vec2) -> Dir2

Create a Dir2 from a Vec2 that is already normalized.

§Warning

value must be normalized, i.e its length must be 1.0.

Examples found in repository?
examples/2d/bounding_2d.rs (line 300)
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fn get_and_draw_ray(gizmos: &mut Gizmos, time: &Time) -> RayCast2d {
    let ray = Vec2::new(time.elapsed_seconds().cos(), time.elapsed_seconds().sin());
    let dist = 150. + (0.5 * time.elapsed_seconds()).sin().abs() * 500.;

    let aabb_ray = Ray2d {
        origin: ray * 250.,
        direction: Dir2::new_unchecked(-ray),
    };
    let ray_cast = RayCast2d::from_ray(aabb_ray, dist - 20.);

    draw_ray(gizmos, &ray_cast);
    ray_cast
}

pub fn new_and_length(value: Vec2) -> Result<(Dir2, f32), InvalidDirectionError>

Create a direction from a finite, nonzero Vec2, normalizing it and also returning its original length.

Returns Err(InvalidDirectionError) if the length of the given vector is zero (or very close to zero), infinite, or NaN.

pub fn from_xy(x: f32, y: f32) -> Result<Dir2, InvalidDirectionError>

Create a direction from its x and y components.

Returns Err(InvalidDirectionError) if the length of the vector formed by the components is zero (or very close to zero), infinite, or NaN.

Examples found in repository?
examples/2d/bounding_2d.rs (line 241)
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fn setup(mut commands: Commands) {
    commands.spawn(Camera2dBundle::default());
    commands.spawn((
        SpatialBundle {
            transform: Transform::from_xyz(-OFFSET_X, OFFSET_Y, 0.),
            ..default()
        },
        Shape::Circle(Circle::new(45.)),
        DesiredVolume::Aabb,
        Intersects::default(),
    ));

    commands.spawn((
        SpatialBundle {
            transform: Transform::from_xyz(0., OFFSET_Y, 0.),
            ..default()
        },
        Shape::Rectangle(Rectangle::new(80., 80.)),
        Spin,
        DesiredVolume::Circle,
        Intersects::default(),
    ));

    commands.spawn((
        SpatialBundle {
            transform: Transform::from_xyz(OFFSET_X, OFFSET_Y, 0.),
            ..default()
        },
        Shape::Triangle(Triangle2d::new(
            Vec2::new(-40., -40.),
            Vec2::new(-20., 40.),
            Vec2::new(40., 50.),
        )),
        Spin,
        DesiredVolume::Aabb,
        Intersects::default(),
    ));

    commands.spawn((
        SpatialBundle {
            transform: Transform::from_xyz(-OFFSET_X, -OFFSET_Y, 0.),
            ..default()
        },
        Shape::Line(Segment2d::new(Dir2::from_xy(1., 0.3).unwrap(), 90.)),
        Spin,
        DesiredVolume::Circle,
        Intersects::default(),
    ));

    commands.spawn((
        SpatialBundle {
            transform: Transform::from_xyz(0., -OFFSET_Y, 0.),
            ..default()
        },
        Shape::Capsule(Capsule2d::new(25., 50.)),
        Spin,
        DesiredVolume::Aabb,
        Intersects::default(),
    ));

    commands.spawn((
        SpatialBundle {
            transform: Transform::from_xyz(OFFSET_X, -OFFSET_Y, 0.),
            ..default()
        },
        Shape::Polygon(RegularPolygon::new(50., 6)),
        Spin,
        DesiredVolume::Circle,
        Intersects::default(),
    ));

    commands.spawn(
        TextBundle::from_section("", TextStyle::default()).with_style(Style {
            position_type: PositionType::Absolute,
            bottom: Val::Px(12.0),
            left: Val::Px(12.0),
            ..default()
        }),
    );
}

pub const fn as_vec2(&self) -> Vec2

Returns the inner Vec2

pub fn slerp(self, rhs: Dir2, s: f32) -> Dir2

Performs a spherical linear interpolation between self and rhs based on the value s.

This corresponds to interpolating between the two directions at a constant angular velocity.

When s == 0.0, the result will be equal to self. When s == 1.0, the result will be equal to rhs.

§Example
let dir1 = Dir2::X;
let dir2 = Dir2::Y;

let result1 = dir1.slerp(dir2, 1.0 / 3.0);
assert_relative_eq!(result1, Dir2::from_xy(0.75_f32.sqrt(), 0.5).unwrap());

let result2 = dir1.slerp(dir2, 0.5);
assert_relative_eq!(result2, Dir2::from_xy(0.5_f32.sqrt(), 0.5_f32.sqrt()).unwrap());

pub fn rotation_to(self, other: Dir2) -> Rot2

Get the rotation that rotates this direction to other.

pub fn rotation_from(self, other: Dir2) -> Rot2

Get the rotation that rotates other to this direction.

pub fn rotation_from_x(self) -> Rot2

Get the rotation that rotates the X-axis to this direction.

pub fn rotation_to_x(self) -> Rot2

Get the rotation that rotates this direction to the X-axis.

pub fn rotation_from_y(self) -> Rot2

Get the rotation that rotates this direction to the Y-axis.

pub fn rotation_to_y(self) -> Rot2

Get the rotation that rotates the Y-axis to this direction.

Methods from Deref<Target = Vec2>§

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pub const ZERO: Vec2 = _

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pub const ONE: Vec2 = _

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pub const NEG_ONE: Vec2 = _

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pub const MIN: Vec2 = _

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pub const MAX: Vec2 = _

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pub const NAN: Vec2 = _

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pub const INFINITY: Vec2 = _

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pub const NEG_INFINITY: Vec2 = _

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pub const X: Vec2 = _

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pub const Y: Vec2 = _

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pub const NEG_X: Vec2 = _

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pub const NEG_Y: Vec2 = _

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pub const AXES: [Vec2; 2] = _

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pub fn to_array(&self) -> [f32; 2]

[x, y]

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pub fn move_towards(&self, rhs: Vec2, d: f32) -> Vec2

Moves towards rhs based on the value d.

When d is 0.0, the result will be equal to self. When d is equal to self.distance(rhs), the result will be equal to rhs. Will not go past rhs.

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pub fn as_dvec2(&self) -> DVec2

Casts all elements of self to f64.

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pub fn as_i16vec2(&self) -> I16Vec2

Casts all elements of self to i16.

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pub fn as_u16vec2(&self) -> U16Vec2

Casts all elements of self to u16.

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pub fn as_ivec2(&self) -> IVec2

Casts all elements of self to i32.

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pub fn as_uvec2(&self) -> UVec2

Casts all elements of self to u32.

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pub fn as_i64vec2(&self) -> I64Vec2

Casts all elements of self to i64.

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pub fn as_u64vec2(&self) -> U64Vec2

Casts all elements of self to u64.

Trait Implementations§

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impl Clone for Dir2

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fn clone(&self) -> Dir2

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for Dir2

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

Formats the value using the given formatter. Read more
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impl Deref for Dir2

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type Target = Vec2

The resulting type after dereferencing.
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fn deref(&self) -> &<Dir2 as Deref>::Target

Dereferences the value.
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impl<'de> Deserialize<'de> for Dir2

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fn deserialize<__D>( __deserializer: __D, ) -> Result<Dir2, <__D as Deserializer<'de>>::Error>
where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
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impl From<CompassOctant> for Dir2

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fn from(o: CompassOctant) -> Dir2

Converts to this type from the input type.
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impl From<CompassQuadrant> for Dir2

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fn from(q: CompassQuadrant) -> Dir2

Converts to this type from the input type.
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impl From<Dir2> for CompassOctant

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fn from(dir: Dir2) -> CompassOctant

Converts a Dir2 to a CompassOctant in a lossy manner. Converting back to a Dir2 is not guaranteed to yield the same value.

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impl From<Dir2> for CompassQuadrant

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fn from(dir: Dir2) -> CompassQuadrant

Converts a Dir2 to a CompassQuadrant in a lossy manner. Converting back to a Dir2 is not guaranteed to yield the same value.

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impl From<Dir2> for Vec2

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fn from(value: Dir2) -> Vec2

Converts to this type from the input type.
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impl FromReflect for Dir2
where Dir2: Any + Send + Sync, Vec2: FromReflect + TypePath + RegisterForReflection,

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fn from_reflect(reflect: &(dyn Reflect + 'static)) -> Option<Dir2>

Constructs a concrete instance of Self from a reflected value.
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fn take_from_reflect( reflect: Box<dyn Reflect>, ) -> Result<Self, Box<dyn Reflect>>

Attempts to downcast the given value to Self using, constructing the value using from_reflect if that fails. Read more
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impl FromRng for Dir2

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fn from_rng<R>(rng: &mut R) -> Self
where R: Rng + ?Sized,

Construct a value of this type uniformly at random using rng as the source of randomness.
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impl GetTypeRegistration for Dir2
where Dir2: Any + Send + Sync, Vec2: FromReflect + TypePath + RegisterForReflection,

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fn get_type_registration() -> TypeRegistration

Returns the default TypeRegistration for this type.
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fn register_type_dependencies(registry: &mut TypeRegistry)

Registers other types needed by this type. Read more
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impl<'w, 's, Config, Clear> GizmoPrimitive2d<Dir2> for Gizmos<'w, 's, Config, Clear>
where Config: GizmoConfigGroup, Clear: 'static + Send + Sync,

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type Output<'a> = () where Gizmos<'w, 's, Config, Clear>: 'a

The output of primitive_2d. This is a builder to set non-default values.
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fn primitive_2d( &mut self, primitive: &Dir2, position: Vec2, angle: f32, color: impl Into<Color>, ) -> <Gizmos<'w, 's, Config, Clear> as GizmoPrimitive2d<Dir2>>::Output<'_>

Renders a 2D primitive with its associated details.
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impl Mul<Dir2> for Rot2

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fn mul(self, direction: Dir2) -> <Rot2 as Mul<Dir2>>::Output

Rotates the Dir2 using a Rot2.

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type Output = Dir2

The resulting type after applying the * operator.
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impl Mul<Dir2> for f32

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type Output = Vec2

The resulting type after applying the * operator.
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fn mul(self, rhs: Dir2) -> <f32 as Mul<Dir2>>::Output

Performs the * operation. Read more
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impl Mul<f32> for Dir2

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type Output = Vec2

The resulting type after applying the * operator.
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fn mul(self, rhs: f32) -> <Dir2 as Mul<f32>>::Output

Performs the * operation. Read more
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impl Neg for Dir2

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type Output = Dir2

The resulting type after applying the - operator.
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fn neg(self) -> <Dir2 as Neg>::Output

Performs the unary - operation. Read more
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impl PartialEq for Dir2

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fn eq(&self, other: &Dir2) -> bool

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Reflect for Dir2
where Dir2: Any + Send + Sync, Vec2: FromReflect + TypePath + RegisterForReflection,

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

Returns the TypeInfo of the type represented by this value. Read more
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fn into_any(self: Box<Dir2>) -> Box<dyn Any>

Returns the value as a Box<dyn Any>.
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fn as_any(&self) -> &(dyn Any + 'static)

Returns the value as a &dyn Any.
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fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

Returns the value as a &mut dyn Any.
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fn into_reflect(self: Box<Dir2>) -> Box<dyn Reflect>

Casts this type to a boxed reflected value.
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fn as_reflect(&self) -> &(dyn Reflect + 'static)

Casts this type to a reflected value.
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fn as_reflect_mut(&mut self) -> &mut (dyn Reflect + 'static)

Casts this type to a mutable reflected value.
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fn clone_value(&self) -> Box<dyn Reflect>

Clones the value as a Reflect trait object. Read more
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fn set(&mut self, value: Box<dyn Reflect>) -> Result<(), Box<dyn Reflect>>

Performs a type-checked assignment of a reflected value to this value. Read more
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fn try_apply( &mut self, value: &(dyn Reflect + 'static), ) -> Result<(), ApplyError>

Tries to apply a reflected value to this value. Read more
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fn reflect_kind(&self) -> ReflectKind

Returns a zero-sized enumeration of “kinds” of type. Read more
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fn reflect_ref(&self) -> ReflectRef<'_>

Returns an immutable enumeration of “kinds” of type. Read more
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fn reflect_mut(&mut self) -> ReflectMut<'_>

Returns a mutable enumeration of “kinds” of type. Read more
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fn reflect_owned(self: Box<Dir2>) -> ReflectOwned

Returns an owned enumeration of “kinds” of type. Read more
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fn reflect_partial_eq(&self, value: &(dyn Reflect + 'static)) -> Option<bool>

Returns a “partial equality” comparison result. Read more
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fn debug(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Debug formatter for the value. Read more
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fn apply(&mut self, value: &(dyn Reflect + 'static))

Applies a reflected value to this value. Read more
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fn reflect_hash(&self) -> Option<u64>

Returns a hash of the value (which includes the type). Read more
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fn serializable(&self) -> Option<Serializable<'_>>

Returns a serializable version of the value. Read more
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fn is_dynamic(&self) -> bool

Indicates whether or not this type is a dynamic type. Read more
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impl Serialize for Dir2

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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. Read more
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impl StableInterpolate for Dir2

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fn interpolate_stable(&self, other: &Dir2, t: f32) -> Dir2

Interpolate between this value and the other given value using the parameter t. At t = 0.0, a value equivalent to self is recovered, while t = 1.0 recovers a value equivalent to other, with intermediate values interpolating between the two. See the trait-level documentation for details.
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fn interpolate_stable_assign(&mut self, other: &Self, t: f32)

A version of interpolate_stable that assigns the result to self for convenience.
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fn smooth_nudge(&mut self, target: &Self, decay_rate: f32, delta: f32)

Smoothly nudge this value towards the target at a given decay rate. The decay_rate parameter controls how fast the distance between self and target decays relative to the units of delta; the intended usage is for decay_rate to generally remain fixed, while delta is something like delta_time from an updating system. This produces a smooth following of the target that is independent of framerate. Read more
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impl TryFrom<Vec2> for Dir2

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type Error = InvalidDirectionError

The type returned in the event of a conversion error.
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fn try_from(value: Vec2) -> Result<Dir2, <Dir2 as TryFrom<Vec2>>::Error>

Performs the conversion.
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impl TupleStruct for Dir2
where Dir2: Any + Send + Sync, Vec2: FromReflect + TypePath + RegisterForReflection,

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

Returns a reference to the value of the field with index index as a &dyn Reflect.
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fn field_mut(&mut self, index: usize) -> Option<&mut (dyn Reflect + 'static)>

Returns a mutable reference to the value of the field with index index as a &mut dyn Reflect.
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fn field_len(&self) -> usize

Returns the number of fields in the tuple struct.
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fn iter_fields(&self) -> TupleStructFieldIter<'_>

Returns an iterator over the values of the tuple struct’s fields.
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fn clone_dynamic(&self) -> DynamicTupleStruct

Clones the struct into a DynamicTupleStruct.
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impl TypePath for Dir2
where Dir2: Any + Send + Sync,

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fn type_path() -> &'static str

Returns the fully qualified path of the underlying type. Read more
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fn short_type_path() -> &'static str

Returns a short, pretty-print enabled path to the type. Read more
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fn type_ident() -> Option<&'static str>

Returns the name of the type, or None if it is anonymous. Read more
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fn crate_name() -> Option<&'static str>

Returns the name of the crate the type is in, or None if it is anonymous. Read more
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fn module_path() -> Option<&'static str>

Returns the path to the module the type is in, or None if it is anonymous. Read more
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impl Typed for Dir2
where Dir2: Any + Send + Sync, Vec2: FromReflect + TypePath + RegisterForReflection,

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fn type_info() -> &'static TypeInfo

Returns the compile-time info for the underlying type.
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impl Copy for Dir2

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impl Primitive2d for Dir2

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impl StructuralPartialEq for Dir2

Auto Trait Implementations§

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impl Freeze for Dir2

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impl RefUnwindSafe for Dir2

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impl Send for Dir2

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impl Sync for Dir2

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impl Unpin for Dir2

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impl UnwindSafe for Dir2

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T, U> AsBindGroupShaderType<U> for T
where U: ShaderType, &'a T: for<'a> Into<U>,

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fn as_bind_group_shader_type(&self, _images: &RenderAssets<GpuImage>) -> U

Return the T ShaderType for self. When used in AsBindGroup derives, it is safe to assume that all images in self exist.
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> Downcast<T> for T

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fn downcast(&self) -> &T

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impl<T> Downcast for T
where T: Any,

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

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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fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>

Convert Rc<Trait> (where Trait: Downcast) to Rc<Any>. Rc<Any> can then be further downcast into Rc<ConcreteType> where ConcreteType implements Trait.
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fn as_any(&self) -> &(dyn Any + 'static)

Convert &Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &Any’s vtable from &Trait’s.
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fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

Convert &mut Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &mut Any’s vtable from &mut Trait’s.
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impl<T> DowncastSync for T
where T: Any + Send + Sync,

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fn into_any_arc(self: Arc<T>) -> Arc<dyn Any + Sync + Send>

Convert Arc<Trait> (where Trait: Downcast) to Arc<Any>. Arc<Any> can then be further downcast into Arc<ConcreteType> where ConcreteType implements Trait.
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impl<T> DynamicTypePath for T
where T: TypePath,

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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<S> FromSample<S> for S

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fn from_sample_(s: S) -> S

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impl<T> GetPath for T
where T: Reflect + ?Sized,

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fn reflect_path<'p>( &self, path: impl ReflectPath<'p>, ) -> Result<&(dyn Reflect + 'static), ReflectPathError<'p>>

Returns a reference to the value specified by path. Read more
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fn reflect_path_mut<'p>( &mut self, path: impl ReflectPath<'p>, ) -> Result<&mut (dyn Reflect + 'static), ReflectPathError<'p>>

Returns a mutable reference to the value specified by path. Read more
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fn path<'p, T>( &self, path: impl ReflectPath<'p>, ) -> Result<&T, ReflectPathError<'p>>
where T: Reflect,

Returns a statically typed reference to the value specified by path. Read more
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fn path_mut<'p, T>( &mut self, path: impl ReflectPath<'p>, ) -> Result<&mut T, ReflectPathError<'p>>
where T: Reflect,

Returns a statically typed mutable reference to the value specified by path. Read more
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impl<S> GetTupleStructField for S
where S: TupleStruct,

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fn get_field<T>(&self, index: usize) -> Option<&T>
where T: Reflect,

Returns a reference to the value of the field with index index, downcast to T.
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where T: Reflect,

Returns a mutable reference to the value of the field with index index, downcast to T.
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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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where T: FromSample<F>,

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const ALIGN: usize = _

The alignment of pointer.
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type Init = T

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unsafe fn init(init: <T as Pointable>::Init) -> usize

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unsafe fn deref<'a>(ptr: usize) -> &'a T

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type Output = T

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fn erased_serialize(&self, serializer: &mut dyn Serializer) -> Result<(), Error>

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where T: Clone,

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Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> ToSample<U> for T
where U: FromSample<T>,

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fn to_sample_(self) -> U

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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<T> TypeData for T
where T: 'static + Send + Sync + Clone,

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fn clone_type_data(&self) -> Box<dyn TypeData>

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impl<T> Upcast<T> for T

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fn upcast(&self) -> Option<&T>

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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V

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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more
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impl<T> ConditionalSend for T
where T: Send,

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impl<T> DeserializeOwned for T
where T: for<'de> Deserialize<'de>,

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impl<S, T> Duplex<S> for T
where T: FromSample<S> + ToSample<S>,

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impl<T> Settings for T
where T: 'static + Send + Sync,

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impl<T> WasmNotSend for T
where T: Send,

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impl<T> WasmNotSendSync for T
where T: WasmNotSend + WasmNotSync,

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impl<T> WasmNotSync for T
where T: Sync,