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;
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use crate::base::allocator::Allocator;
use crate::base::dimension::{DimNameAdd, DimNameSum, U1};
use crate::base::{Const, DefaultAllocator, Matrix, Scalar, VectorN};
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use crate::geometry::Point;
/*
* This file provides the following conversions:
* =============================================
*
* Point -> Point
* Point -> Vector (homogeneous)
*/
impl<N1, N2, const D: usize> SubsetOf<Point<N2, D>> for Point<N1, D>
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where
N1: Scalar,
N2: Scalar + SupersetOf<N1>,
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{
#[inline]
fn to_superset(&self) -> Point<N2, D> {
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Point::from(self.coords.to_superset())
}
#[inline]
fn is_in_subset(m: &Point<N2, 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]
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fn from_superset_unchecked(m: &Point<N2, D>) -> Self {
Self::from(Matrix::from_superset_unchecked(&m.coords))
}
}
impl<N1, N2, const D: usize> SubsetOf<VectorN<N2, DimNameSum<Const<D>, U1>>> for Point<N1, D>
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where
Const<D>: DimNameAdd<U1>,
N1: Scalar,
N2: Scalar + Zero + One + ClosedDiv + SupersetOf<N1>,
DefaultAllocator:
Allocator<N1, DimNameSum<Const<D>, U1>> + Allocator<N2, DimNameSum<Const<D>, U1>>,
// + Allocator<N1, D>
// + Allocator<N2, D>,
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{
#[inline]
fn to_superset(&self) -> VectorN<N2, DimNameSum<Const<D>, U1>> {
let p: Point<N2, D> = self.to_superset();
p.to_homogeneous()
}
#[inline]
fn is_in_subset(v: &VectorN<N2, DimNameSum<Const<D>, U1>>) -> bool {
crate::is_convertible::<_, VectorN<N1, DimNameSum<Const<D>, U1>>>(v) && !v[D].is_zero()
}
#[inline]
fn from_superset_unchecked(v: &VectorN<N2, DimNameSum<Const<D>, U1>>) -> Self {
let coords = v.fixed_slice::<Const<D>, U1>(0, 0) / v[D].inlined_clone();
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Self {
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coords: crate::convert_unchecked(coords),
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}
}
}
impl<N: Scalar + Zero + One, const D: usize> From<Point<N, D>>
for VectorN<N, DimNameSum<Const<D>, U1>>
where
Const<D>: DimNameAdd<U1>,
DefaultAllocator: Allocator<N, DimNameSum<Const<D>, U1>>,
{
#[inline]
fn from(t: Point<N, D>) -> Self {
t.to_homogeneous()
}
}
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impl<N: Scalar, const D: usize> From<VectorN<N, Const<D>>> for Point<N, D>
// where
// DefaultAllocator: Allocator<N, D>,
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{
#[inline]
fn from(coords: VectorN<N, Const<D>>) -> Self {
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Point { coords }
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}
}
impl<N: Scalar + Copy + PrimitiveSimdValue, const D: usize> From<[Point<N::Element, D>; 2]>
for Point<N, D>
where
N: From<[<N as simba::simd::SimdValue>::Element; 2]>,
N::Element: Scalar + Copy,
<DefaultAllocator as Allocator<N::Element, Const<D>>>::Buffer: Copy,
{
#[inline]
fn from(arr: [Point<N::Element, D>; 2]) -> Self {
Self::from(VectorN::from([arr[0].coords, arr[1].coords]))
}
}
impl<N: Scalar + Copy + PrimitiveSimdValue, const D: usize> From<[Point<N::Element, D>; 4]>
for Point<N, D>
where
N: From<[<N as simba::simd::SimdValue>::Element; 4]>,
N::Element: Scalar + Copy,
<DefaultAllocator as Allocator<N::Element, Const<D>>>::Buffer: Copy,
{
#[inline]
fn from(arr: [Point<N::Element, D>; 4]) -> Self {
Self::from(VectorN::from([
arr[0].coords,
arr[1].coords,
arr[2].coords,
arr[3].coords,
]))
}
}
impl<N: Scalar + Copy + PrimitiveSimdValue, const D: usize> From<[Point<N::Element, D>; 8]>
for Point<N, D>
where
N: From<[<N as simba::simd::SimdValue>::Element; 8]>,
N::Element: Scalar + Copy,
<DefaultAllocator as Allocator<N::Element, Const<D>>>::Buffer: Copy,
{
#[inline]
fn from(arr: [Point<N::Element, D>; 8]) -> Self {
Self::from(VectorN::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<N: Scalar + Copy + PrimitiveSimdValue, const D: usize> From<[Point<N::Element, D>; 16]>
for Point<N, D>
where
N: From<[<N as simba::simd::SimdValue>::Element; 16]>,
N::Element: Scalar + Copy,
<DefaultAllocator as Allocator<N::Element, Const<D>>>::Buffer: Copy,
{
#[inline]
fn from(arr: [Point<N::Element, D>; 16]) -> Self {
Self::from(VectorN::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,
]))
}
}