2016-12-05 05:44:42 +08:00
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#[cfg(feature = "arbitrary")]
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2019-03-23 21:29:07 +08:00
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use crate::base::storage::Owned;
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2018-05-23 05:58:14 +08:00
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#[cfg(feature = "arbitrary")]
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use quickcheck::{Arbitrary, Gen};
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2016-12-05 05:44:42 +08:00
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2018-02-02 19:26:35 +08:00
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use num::{One, Zero};
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2021-03-02 19:25:12 +08:00
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#[cfg(feature = "rand-no-std")]
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use rand::{
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distributions::{Distribution, Standard},
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Rng,
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};
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2016-12-05 05:44:42 +08:00
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2021-03-06 00:08:46 +08:00
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use simba::scalar::{ClosedAdd, SupersetOf};
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2016-12-05 05:44:42 +08:00
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2021-04-11 17:00:38 +08:00
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use crate::base::{SVector, Scalar};
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2019-03-23 21:29:07 +08:00
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use crate::geometry::Translation;
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2016-12-05 05:44:42 +08:00
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2021-04-11 17:00:38 +08:00
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impl<T: Scalar, const D: usize> Translation<T, D> {
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2018-10-28 14:33:14 +08:00
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/// Creates a new identity translation.
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///
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/// # Example
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/// ```
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/// # use nalgebra::{Point2, Point3, Translation2, Translation3};
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/// let t = Translation2::identity();
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/// let p = Point2::new(1.0, 2.0);
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/// assert_eq!(t * p, p);
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///
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/// // Works in all dimensions.
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/// let t = Translation3::identity();
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/// let p = Point3::new(1.0, 2.0, 3.0);
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/// assert_eq!(t * p, p);
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/// ```
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2016-12-05 05:44:42 +08:00
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#[inline]
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2021-04-11 17:00:38 +08:00
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pub fn identity() -> Translation<T, D>
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where
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T: Zero,
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{
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Self::from(SVector::<T, D>::from_element(T::zero()))
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2016-12-05 05:44:42 +08:00
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}
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2021-03-06 00:08:46 +08:00
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/// Cast the components of `self` to another type.
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///
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/// # Example
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/// ```
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/// # use nalgebra::Translation2;
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/// let tra = Translation2::new(1.0f64, 2.0);
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/// let tra2 = tra.cast::<f32>();
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/// assert_eq!(tra2, Translation2::new(1.0f32, 2.0));
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/// ```
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pub fn cast<To: Scalar>(self) -> Translation<To, D>
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where
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Translation<To, D>: SupersetOf<Self>,
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{
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crate::convert(self)
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}
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2016-12-05 05:44:42 +08:00
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}
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2021-04-11 17:00:38 +08:00
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impl<T: Scalar + Zero + ClosedAdd, const D: usize> One for Translation<T, D> {
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2016-12-05 05:44:42 +08:00
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#[inline]
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fn one() -> Self {
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Self::identity()
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}
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}
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2021-03-02 19:25:12 +08:00
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#[cfg(feature = "rand-no-std")]
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2021-04-11 17:00:38 +08:00
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impl<T: Scalar, const D: usize> Distribution<Translation<T, D>> for Standard
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2018-02-02 19:26:35 +08:00
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where
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2021-04-11 17:00:38 +08:00
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Standard: Distribution<T>,
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2018-02-02 19:26:35 +08:00
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{
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2021-04-10 14:20:30 +08:00
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/// Generate an arbitrary random variate for testing purposes.
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2016-12-05 05:44:42 +08:00
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#[inline]
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fn sample<'a, G: Rng + ?Sized>(&self, rng: &'a mut G) -> Translation<T, D> {
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Translation::from(rng.gen::<SVector<T, D>>())
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2016-12-05 05:44:42 +08:00
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}
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}
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#[cfg(feature = "arbitrary")]
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impl<T: Scalar + Arbitrary + Send, const D: usize> Arbitrary for Translation<T, D>
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2018-02-02 19:26:35 +08:00
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where
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Owned<T, crate::Const<D>>: Send,
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2018-02-02 19:26:35 +08:00
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{
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2016-12-05 05:44:42 +08:00
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#[inline]
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fn arbitrary(rng: &mut Gen) -> Self {
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2021-04-11 17:00:38 +08:00
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let v: SVector<T, D> = Arbitrary::arbitrary(rng);
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2018-11-01 17:20:19 +08:00
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Self::from(v)
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2016-12-05 05:44:42 +08:00
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}
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}
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/*
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*
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* Small translation construction from components.
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*
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*/
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macro_rules! componentwise_constructors_impl(
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2021-04-07 20:29:20 +08:00
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($($doc: expr; $D: expr, $($args: ident:$irow: expr),*);* $(;)*) => {$(
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2021-04-12 16:32:17 +08:00
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impl<T> Translation<T, $D>
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2021-04-07 20:29:20 +08:00
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{
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2018-10-28 14:33:14 +08:00
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#[doc = "Initializes this translation from its components."]
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#[doc = "# Example\n```"]
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#[doc = $doc]
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#[doc = "```"]
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2016-12-05 05:44:42 +08:00
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#[inline]
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2021-04-12 16:32:17 +08:00
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pub const fn new($($args: T),*) -> Self {
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Self { vector: SVector::<T, $D>::new($($args),*) }
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2016-12-05 05:44:42 +08:00
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}
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}
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)*}
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);
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componentwise_constructors_impl!(
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2018-10-28 14:33:14 +08:00
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"# use nalgebra::Translation1;\nlet t = Translation1::new(1.0);\nassert!(t.vector.x == 1.0);";
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2021-04-07 20:29:20 +08:00
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1, x:0;
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2018-10-28 14:33:14 +08:00
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"# use nalgebra::Translation2;\nlet t = Translation2::new(1.0, 2.0);\nassert!(t.vector.x == 1.0 && t.vector.y == 2.0);";
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2021-04-07 20:29:20 +08:00
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2, x:0, y:1;
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2018-10-28 14:33:14 +08:00
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"# use nalgebra::Translation3;\nlet t = Translation3::new(1.0, 2.0, 3.0);\nassert!(t.vector.x == 1.0 && t.vector.y == 2.0 && t.vector.z == 3.0);";
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2021-04-07 20:29:20 +08:00
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3, x:0, y:1, z:2;
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2018-10-28 14:33:14 +08:00
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"# use nalgebra::Translation4;\nlet t = Translation4::new(1.0, 2.0, 3.0, 4.0);\nassert!(t.vector.x == 1.0 && t.vector.y == 2.0 && t.vector.z == 3.0 && t.vector.w == 4.0);";
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2021-04-07 20:29:20 +08:00
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4, x:0, y:1, z:2, w:3;
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2018-10-28 14:33:14 +08:00
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"# use nalgebra::Translation5;\nlet t = Translation5::new(1.0, 2.0, 3.0, 4.0, 5.0);\nassert!(t.vector.x == 1.0 && t.vector.y == 2.0 && t.vector.z == 3.0 && t.vector.w == 4.0 && t.vector.a == 5.0);";
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2021-04-07 20:29:20 +08:00
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5, x:0, y:1, z:2, w:3, a:4;
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2018-10-28 14:33:14 +08:00
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"# use nalgebra::Translation6;\nlet t = Translation6::new(1.0, 2.0, 3.0, 4.0, 5.0, 6.0);\nassert!(t.vector.x == 1.0 && t.vector.y == 2.0 && t.vector.z == 3.0 && t.vector.w == 4.0 && t.vector.a == 5.0 && t.vector.b == 6.0);";
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2021-04-07 20:29:20 +08:00
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6, x:0, y:1, z:2, w:3, a:4, b:5;
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2016-12-05 05:44:42 +08:00
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);
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