nalgebra/src/geometry/translation_construction.rs

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#[cfg(feature = "arbitrary")]
use base::storage::Owned;
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#[cfg(feature = "arbitrary")]
use quickcheck::{Arbitrary, Gen};
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use num::{One, Zero};
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use rand::distributions::{Distribution, Standard};
use rand::Rng;
use alga::general::ClosedAdd;
use base::allocator::Allocator;
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use base::dimension::{DimName, U1, U2, U3, U4, U5, U6};
use base::{DefaultAllocator, Scalar, VectorN};
use geometry::Translation;
impl<N: Scalar + Zero, D: DimName> Translation<N, D>
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where DefaultAllocator: Allocator<N, D>
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{
/// Creates a new square identity rotation of the given `dimension`.
#[inline]
pub fn identity() -> Translation<N, D> {
Self::from_vector(VectorN::<N, D>::from_element(N::zero()))
}
}
impl<N: Scalar + Zero + ClosedAdd, D: DimName> One for Translation<N, D>
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where DefaultAllocator: Allocator<N, D>
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{
#[inline]
fn one() -> Self {
Self::identity()
}
}
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impl<N: Scalar, D: DimName> Distribution<Translation<N, D>> for Standard
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where
DefaultAllocator: Allocator<N, D>,
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Standard: Distribution<N>,
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{
#[inline]
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fn sample<'a, G: Rng + ?Sized>(&self, rng: &'a mut G) -> Translation<N, D> {
Translation::from_vector(rng.gen::<VectorN<N, D>>())
}
}
#[cfg(feature = "arbitrary")]
impl<N: Scalar + Arbitrary, D: DimName> Arbitrary for Translation<N, D>
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where
DefaultAllocator: Allocator<N, D>,
Owned<N, D>: Send,
{
#[inline]
fn arbitrary<G: Gen>(rng: &mut G) -> Self {
Self::from_vector(Arbitrary::arbitrary(rng))
}
}
/*
*
* Small translation construction from components.
*
*/
macro_rules! componentwise_constructors_impl(
($($D: ty, $($args: ident:$irow: expr),*);* $(;)*) => {$(
impl<N: Scalar> Translation<N, $D>
where DefaultAllocator: Allocator<N, $D> {
/// Initializes this matrix from its components.
#[inline]
pub fn new($($args: N),*) -> Self {
Self::from_vector(VectorN::<N, $D>::new($($args),*))
}
}
)*}
);
componentwise_constructors_impl!(
U1, x:0;
U2, x:0, y:1;
U3, x:0, y:1, z:2;
U4, x:0, y:1, z:2, w:3;
U5, x:0, y:1, z:2, w:3, a:4;
U6, x:0, y:1, z:2, w:3, a:4, b:5;
);