nalgebra/src/geometry/point_conversion.rs

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use num::{One, Zero};
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use simba::scalar::{ClosedDiv, SubsetOf, SupersetOf};
use simba::simd::PrimitiveSimdValue;
use crate::base::allocator::Allocator;
use crate::base::dimension::{DimNameAdd, DimNameSum, U1};
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use crate::base::{Const, DefaultAllocator, Matrix, OVector, Scalar};
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use crate::geometry::Point;
use crate::{DimName, OPoint};
/*
* This file provides the following conversions:
* =============================================
*
* Point -> Point
* Point -> Vector (homogeneous)
*/
impl<T1, T2, D: DimName> SubsetOf<OPoint<T2, D>> for OPoint<T1, D>
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where
T1: Scalar,
T2: Scalar + SupersetOf<T1>,
DefaultAllocator: Allocator<T1, D> + Allocator<T2, D>,
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{
#[inline]
fn to_superset(&self) -> OPoint<T2, D> {
OPoint::from(self.coords.to_superset())
}
#[inline]
fn is_in_subset(m: &OPoint<T2, D>) -> bool {
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// TODO: is there a way to reuse the `.is_in_subset` from the matrix implementation of
// SubsetOf?
m.iter().all(|e| e.is_in_subset())
}
#[inline]
fn from_superset_unchecked(m: &OPoint<T2, D>) -> Self {
Self::from(Matrix::from_superset_unchecked(&m.coords))
}
}
impl<T1, T2, D> SubsetOf<OVector<T2, DimNameSum<D, U1>>> for OPoint<T1, D>
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where
D: DimNameAdd<U1>,
T1: Scalar,
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T2: Scalar + Zero + One + ClosedDiv + SupersetOf<T1>,
DefaultAllocator: Allocator<T1, D>
+ Allocator<T2, D>
+ Allocator<T1, DimNameSum<D, U1>>
+ Allocator<T2, DimNameSum<D, U1>>,
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// + Allocator<T1, D>
// + Allocator<T2, D>,
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{
#[inline]
fn to_superset(&self) -> OVector<T2, DimNameSum<D, U1>> {
let p: OPoint<T2, D> = self.to_superset();
p.to_homogeneous()
}
#[inline]
fn is_in_subset(v: &OVector<T2, DimNameSum<D, U1>>) -> bool {
crate::is_convertible::<_, OVector<T1, DimNameSum<D, U1>>>(v) && !v[D::dim()].is_zero()
}
#[inline]
fn from_superset_unchecked(v: &OVector<T2, DimNameSum<D, U1>>) -> Self {
let coords = v.generic_slice((0, 0), (D::name(), Const::<1>)) / v[D::dim()].inlined_clone();
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Self {
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coords: crate::convert_unchecked(coords),
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}
}
}
impl<T: Scalar + Zero + One, D: DimName> From<OPoint<T, D>> for OVector<T, DimNameSum<D, U1>>
where
D: DimNameAdd<U1>,
DefaultAllocator: Allocator<T, DimNameSum<D, U1>> + Allocator<T, D>,
{
#[inline]
fn from(t: OPoint<T, D>) -> Self {
t.to_homogeneous()
}
}
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impl<T: Scalar, const D: usize> From<[T; D]> for Point<T, D> {
#[inline]
fn from(coords: [T; D]) -> Self {
Point {
coords: coords.into(),
}
}
}
impl<T: Scalar, const D: usize> From<Point<T, D>> for [T; D] {
#[inline]
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fn from(p: Point<T, D>) -> Self {
p.coords.into()
}
}
impl<T: Scalar, D: DimName> From<OVector<T, D>> for OPoint<T, D>
where
DefaultAllocator: Allocator<T, D>,
{
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#[inline]
fn from(coords: OVector<T, D>) -> Self {
OPoint { coords }
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}
}
impl<T: Scalar + Copy + PrimitiveSimdValue, const D: usize> From<[Point<T::Element, D>; 2]>
for Point<T, D>
where
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T: From<[<T as simba::simd::SimdValue>::Element; 2]>,
T::Element: Scalar + Copy,
<DefaultAllocator as Allocator<T::Element, Const<D>>>::Buffer: Copy,
{
#[inline]
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fn from(arr: [Point<T::Element, D>; 2]) -> Self {
Self::from(OVector::from([arr[0].coords, arr[1].coords]))
}
}
impl<T: Scalar + Copy + PrimitiveSimdValue, const D: usize> From<[Point<T::Element, D>; 4]>
for Point<T, D>
where
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T: From<[<T as simba::simd::SimdValue>::Element; 4]>,
T::Element: Scalar + Copy,
<DefaultAllocator as Allocator<T::Element, Const<D>>>::Buffer: Copy,
{
#[inline]
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fn from(arr: [Point<T::Element, D>; 4]) -> Self {
Self::from(OVector::from([
arr[0].coords,
arr[1].coords,
arr[2].coords,
arr[3].coords,
]))
}
}
impl<T: Scalar + Copy + PrimitiveSimdValue, const D: usize> From<[Point<T::Element, D>; 8]>
for Point<T, D>
where
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T: From<[<T as simba::simd::SimdValue>::Element; 8]>,
T::Element: Scalar + Copy,
<DefaultAllocator as Allocator<T::Element, Const<D>>>::Buffer: Copy,
{
#[inline]
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fn from(arr: [Point<T::Element, D>; 8]) -> Self {
Self::from(OVector::from([
arr[0].coords,
arr[1].coords,
arr[2].coords,
arr[3].coords,
arr[4].coords,
arr[5].coords,
arr[6].coords,
arr[7].coords,
]))
}
}
impl<T: Scalar + Copy + PrimitiveSimdValue, const D: usize> From<[Point<T::Element, D>; 16]>
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for Point<T, D>
where
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T: From<[<T as simba::simd::SimdValue>::Element; 16]>,
T::Element: Scalar + Copy,
<DefaultAllocator as Allocator<T::Element, Const<D>>>::Buffer: Copy,
{
#[inline]
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fn from(arr: [Point<T::Element, D>; 16]) -> Self {
Self::from(OVector::from([
arr[0].coords,
arr[1].coords,
arr[2].coords,
arr[3].coords,
arr[4].coords,
arr[5].coords,
arr[6].coords,
arr[7].coords,
arr[8].coords,
arr[9].coords,
arr[10].coords,
arr[11].coords,
arr[12].coords,
arr[13].coords,
arr[14].coords,
arr[15].coords,
]))
}
}