Struct euclid::Translation2D

#[repr(C)]
pub struct Translation2D<T, Src, Dst> {
    pub x: T,
    pub y: T,
    /* private fields */
}

A 2d transformation from a space to another that can only express translations.

The main benefit of this type over a Vector2D is the ability to cast between a source and a destination spaces.

Example:

use euclid::{Translation2D, Point2D, point2};
struct ParentSpace;
struct ChildSpace;
type ScrollOffset = Translation2D<i32, ParentSpace, ChildSpace>;
type ParentPoint = Point2D<i32, ParentSpace>;
type ChildPoint = Point2D<i32, ChildSpace>;

let scrolling = ScrollOffset::new(0, 100);
let p1: ParentPoint = point2(0, 0);
let p2: ChildPoint = scrolling.transform_point(p1);

Fields

x: T

y: T

Implementations

impl<T, Src, Dst> Translation2D<T, Src, Dst>

pub const fn new(x: T, y: T) -> Self

pub fn splat(v: T) -> Self

where T: Clone,

pub fn identity() -> Self

where T: Zero,

Creates no-op translation (both x and y is zero()).

pub fn is_identity(&self) -> bool

where T: Zero + PartialEq,

Check if translation does nothing (both x and y is zero()).

use euclid::default::Translation2D;

assert_eq!(Translation2D::<f32>::identity().is_identity(), true);
assert_eq!(Translation2D::new(0, 0).is_identity(), true);
assert_eq!(Translation2D::new(1, 0).is_identity(), false);
assert_eq!(Translation2D::new(0, 1).is_identity(), false);

pub fn transform_size(&self, s: Size2D<T, Src>) -> Size2D<T, Dst>

No-op, just cast the unit.

impl<T: Copy, Src, Dst> Translation2D<T, Src, Dst>

pub fn to_vector(&self) -> Vector2D<T, Src>

Cast into a 2D vector.

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

Cast into an array with x and y.

pub fn to_tuple(&self) -> (T, T)

Cast into a tuple with x and y.

pub fn to_untyped(&self) -> Translation2D<T, UnknownUnit, UnknownUnit>

Drop the units, preserving only the numeric value.

pub fn from_untyped(t: &Translation2D<T, UnknownUnit, UnknownUnit>) -> Self

Tag a unitless value with units.

pub fn to_transform(&self) -> Transform2D<T, Src, Dst>

where T: Zero + One,

Returns the matrix representation of this translation.

pub fn transform_point(&self, p: Point2D<T, Src>) -> Point2D<T::Output, Dst>

where T: Add,

Translate a point and cast its unit.

pub fn transform_rect(&self, r: &Rect<T, Src>) -> Rect<T::Output, Dst>

where T: Add<Output = T>,

Translate a rectangle and cast its unit.

pub fn transform_box(&self, r: &Box2D<T, Src>) -> Box2D<T::Output, Dst>

where T: Add,

Translate a 2D box and cast its unit.

pub fn inverse(&self) -> Translation2D<T::Output, Dst, Src>

where T: Neg,

Return the inverse transformation.

Trait Implementations

impl<T: Add, Src, Dst1, Dst2> Add<Translation2D<T, Dst1, Dst2>> for Translation2D<T, Src, Dst1>

type Output = Translation2D<<T as Add>::Output, Src, Dst2>

The resulting type after applying the + operator.

fn add(self, other: Translation2D<T, Dst1, Dst2>) -> Self::Output

Performs the + operation.

impl<T: AddAssign, Src, Dst> AddAssign<Translation2D<T, Dst, Dst>> for Translation2D<T, Src, Dst>

fn add_assign(&mut self, other: Translation2D<T, Dst, Dst>)

Performs the += operation.

impl<T: Clone, Src, Dst> Clone for Translation2D<T, Src, Dst>

fn clone(&self) -> Self

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<T: Debug, Src, Dst> Debug for Translation2D<T, Src, Dst>

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

Formats the value using the given formatter.

impl<T, Src, Dst> Default for Translation2D<T, Src, Dst>

where T: Zero,

fn default() -> Self

Returns the “default value” for a type.

impl<T, Src, Dst> From<Vector2D<T, Src>> for Translation2D<T, Src, Dst>

fn from(v: Vector2D<T, Src>) -> Self

Converts to this type from the input type.

impl<T, Src, Dst> Hash for Translation2D<T, Src, Dst>

where T: Hash,

fn hash<H: Hasher>(&self, h: &mut H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<T, Src, Dst> Into<Transform2D<T, Src, Dst>> for Translation2D<T, Src, Dst>

where T: Zero + One,

fn into(self) -> Transform2D<T, Src, Dst>

Converts this type into the (usually inferred) input type.

impl<T, Src, Dst> Into<Vector2D<T, Src>> for Translation2D<T, Src, Dst>

fn into(self) -> Vector2D<T, Src>

Converts this type into the (usually inferred) input type.

impl<T, Src, Dst> PartialEq for Translation2D<T, Src, Dst>

where T: PartialEq,

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

This method tests for self and other values to be equal, and is used by ==.

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.

impl<T: Sub, Src, Dst1, Dst2> Sub<Translation2D<T, Dst1, Dst2>> for Translation2D<T, Src, Dst2>

type Output = Translation2D<<T as Sub>::Output, Src, Dst1>

The resulting type after applying the - operator.

fn sub(self, other: Translation2D<T, Dst1, Dst2>) -> Self::Output

Performs the - operation.

impl<T: SubAssign, Src, Dst> SubAssign<Translation2D<T, Dst, Dst>> for Translation2D<T, Src, Dst>

fn sub_assign(&mut self, other: Translation2D<T, Dst, Dst>)

Performs the -= operation.

impl<T: Copy, Src, Dst> Copy for Translation2D<T, Src, Dst>

impl<T, Src, Dst> Eq for Translation2D<T, Src, Dst>

where T: Eq,