nalgebra 0.34.2

General-purpose linear algebra library with transformations and statically-sized or dynamically-sized matrices.
Documentation 
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use simba::simd::SimdValue;

use crate::Scalar;
use crate::base::Vector4;
use crate::geometry::{Quaternion, UnitQuaternion};

impl<T: Scalar + SimdValue> SimdValue for Quaternion<T>
where
    T::Element: Scalar,
{
    const LANES: usize = T::LANES;
    type Element = Quaternion<T::Element>;
    type SimdBool = T::SimdBool;

    #[inline]
    fn splat(val: Self::Element) -> Self {
        Vector4::splat(val.coords).into()
    }

    #[inline]
    fn extract(&self, i: usize) -> Self::Element {
        self.coords.extract(i).into()
    }

    #[inline]
    unsafe fn extract_unchecked(&self, i: usize) -> Self::Element {
        unsafe { self.coords.extract_unchecked(i).into() }
    }

    #[inline]
    fn replace(&mut self, i: usize, val: Self::Element) {
        self.coords.replace(i, val.coords)
    }

    #[inline]
    unsafe fn replace_unchecked(&mut self, i: usize, val: Self::Element) {
        unsafe { self.coords.replace_unchecked(i, val.coords) }
    }

    #[inline]
    fn select(self, cond: Self::SimdBool, other: Self) -> Self {
        self.coords.select(cond, other.coords).into()
    }
}

impl<T: Scalar + SimdValue> SimdValue for UnitQuaternion<T>
where
    T::Element: Scalar,
{
    const LANES: usize = T::LANES;
    type Element = UnitQuaternion<T::Element>;
    type SimdBool = T::SimdBool;

    #[inline]
    fn splat(val: Self::Element) -> Self {
        UnitQuaternion::new_unchecked(Quaternion::splat(val.into_inner()))
    }

    #[inline]
    fn extract(&self, i: usize) -> Self::Element {
        UnitQuaternion::new_unchecked(self.as_ref().extract(i))
    }

    #[inline]
    unsafe fn extract_unchecked(&self, i: usize) -> Self::Element {
        unsafe { UnitQuaternion::new_unchecked(self.as_ref().extract_unchecked(i)) }
    }

    #[inline]
    fn replace(&mut self, i: usize, val: Self::Element) {
        self.as_mut_unchecked().replace(i, val.into_inner())
    }

    #[inline]
    unsafe fn replace_unchecked(&mut self, i: usize, val: Self::Element) {
        unsafe {
            self.as_mut_unchecked()
                .replace_unchecked(i, val.into_inner())
        }
    }

    #[inline]
    fn select(self, cond: Self::SimdBool, other: Self) -> Self {
        UnitQuaternion::new_unchecked(self.into_inner().select(cond, other.into_inner()))
    }
}