forked from M-Labs/nalgebra
74 lines
2.5 KiB
Rust
74 lines
2.5 KiB
Rust
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use num::{One, Zero};
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use alga::general::{SubsetOf, SupersetOf, ClosedDiv};
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use core::{Scalar, Matrix, ColumnVector, OwnedColumnVector};
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use core::dimension::{DimName, DimNameSum, DimNameAdd, U1};
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use core::storage::OwnedStorage;
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use core::allocator::{Allocator, OwnedAllocator};
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use geometry::{PointBase, OwnedPoint};
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/*
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* This file provides the following conversions:
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* =============================================
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*
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* PointBase -> PointBase
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* PointBase -> ColumnVector (homogeneous)
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*/
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impl<N1, N2, D, SA, SB> SubsetOf<PointBase<N2, D, SB>> for PointBase<N1, D, SA>
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where D: DimName,
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N1: Scalar,
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N2: Scalar + SupersetOf<N1>,
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SA: OwnedStorage<N1, D, U1>,
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SB: OwnedStorage<N2, D, U1>,
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SB::Alloc: OwnedAllocator<N2, D, U1, SB>,
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SA::Alloc: OwnedAllocator<N1, D, U1, SA> {
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#[inline]
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fn to_superset(&self) -> PointBase<N2, D, SB> {
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PointBase::from_coordinates(self.coords.to_superset())
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}
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#[inline]
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fn is_in_subset(m: &PointBase<N2, D, SB>) -> bool {
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// FIXME: is there a way to reuse the `.is_in_subset` from the matrix implementation of
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// SubsetOf?
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m.iter().all(|e| e.is_in_subset())
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}
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#[inline]
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unsafe fn from_superset_unchecked(m: &PointBase<N2, D, SB>) -> Self {
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PointBase::from_coordinates(Matrix::from_superset_unchecked(&m.coords))
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}
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}
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impl<N1, N2, D, SA, SB> SubsetOf<ColumnVector<N2, DimNameSum<D, U1>, SB>> for PointBase<N1, D, SA>
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where D: DimNameAdd<U1>,
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N1: Scalar,
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N2: Scalar + Zero + One + ClosedDiv + SupersetOf<N1>,
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SA: OwnedStorage<N1, D, U1>,
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SB: OwnedStorage<N2, DimNameSum<D, U1>, U1>,
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SA::Alloc: OwnedAllocator<N1, D, U1, SA> +
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Allocator<N1, DimNameSum<D, U1>, U1>,
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SB::Alloc: OwnedAllocator<N2, DimNameSum<D, U1>, U1, SB> +
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Allocator<N2, D, U1> {
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#[inline]
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fn to_superset(&self) -> ColumnVector<N2, DimNameSum<D, U1>, SB> {
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let p: OwnedPoint<N2, D, SB::Alloc> = self.to_superset();
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p.to_homogeneous()
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}
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#[inline]
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fn is_in_subset(v: &ColumnVector<N2, DimNameSum<D, U1>, SB>) -> bool {
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::is_convertible::<_, OwnedColumnVector<N1, DimNameSum<D, U1>, SA::Alloc>>(v) &&
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!v[D::dim()].is_zero()
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}
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#[inline]
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unsafe fn from_superset_unchecked(v: &ColumnVector<N2, DimNameSum<D, U1>, SB>) -> Self {
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let coords = v.fixed_slice::<D, U1>(0, 0) / v[D::dim()];
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Self::from_coordinates(::convert_unchecked(coords))
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}
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}
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