nalgebra/src/geometry/scale_conversion.rs

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use num::{One, Zero};
use simba::scalar::{RealField, 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, OMatrix, OVector, SVector, Scalar};
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use crate::geometry::{Scale, SuperTCategoryOf, TAffine, Transform};
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use crate::Point;
/*
* This file provides the following conversions:
* =============================================
*
* Scale -> Scale
* Scale -> Transform
* Scale -> Matrix (homogeneous)
*/
impl<T1, T2, const D: usize> SubsetOf<Scale<T2, D>> for Scale<T1, D>
where
T1: Scalar,
T2: Scalar + SupersetOf<T1>,
{
#[inline]
fn to_superset(&self) -> Scale<T2, D> {
Scale::from(self.vector.to_superset())
}
#[inline]
fn is_in_subset(rot: &Scale<T2, D>) -> bool {
crate::is_convertible::<_, SVector<T1, D>>(&rot.vector)
}
#[inline]
fn from_superset_unchecked(rot: &Scale<T2, D>) -> Self {
Scale {
vector: rot.vector.to_subset_unchecked(),
}
}
}
impl<T1, T2, C, const D: usize> SubsetOf<Transform<T2, C, D>> for Scale<T1, D>
where
T1: RealField,
T2: RealField + SupersetOf<T1>,
C: SuperTCategoryOf<TAffine>,
Const<D>: DimNameAdd<U1>,
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DefaultAllocator: Allocator<T1, DimNameSum<Const<D>, U1>, DimNameSum<Const<D>, U1>>
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+ Allocator<T1, DimNameSum<Const<D>, U1>, U1>
+ Allocator<T2, DimNameSum<Const<D>, U1>, DimNameSum<Const<D>, U1>>,
{
#[inline]
fn to_superset(&self) -> Transform<T2, C, D> {
Transform::from_matrix_unchecked(self.to_homogeneous().to_superset())
}
#[inline]
fn is_in_subset(t: &Transform<T2, C, D>) -> bool {
<Self as SubsetOf<_>>::is_in_subset(t.matrix())
}
#[inline]
fn from_superset_unchecked(t: &Transform<T2, C, D>) -> Self {
Self::from_superset_unchecked(t.matrix())
}
}
impl<T1, T2, const D: usize>
SubsetOf<OMatrix<T2, DimNameSum<Const<D>, U1>, DimNameSum<Const<D>, U1>>> for Scale<T1, D>
where
T1: RealField,
T2: RealField + SupersetOf<T1>,
Const<D>: DimNameAdd<U1>,
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DefaultAllocator: Allocator<T1, DimNameSum<Const<D>, U1>, DimNameSum<Const<D>, U1>>
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+ Allocator<T1, DimNameSum<Const<D>, U1>, U1>
+ Allocator<T2, DimNameSum<Const<D>, U1>, DimNameSum<Const<D>, U1>>,
{
#[inline]
fn to_superset(&self) -> OMatrix<T2, DimNameSum<Const<D>, U1>, DimNameSum<Const<D>, U1>> {
self.to_homogeneous().to_superset()
}
#[inline]
fn is_in_subset(m: &OMatrix<T2, DimNameSum<Const<D>, U1>, DimNameSum<Const<D>, U1>>) -> bool {
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if m[(D, D)] != T2::one() {
return false;
}
for i in 0..D + 1 {
for j in 0..D + 1 {
if i != j && m[(i, j)] != T2::zero() {
return false;
}
}
}
true
}
#[inline]
fn from_superset_unchecked(
m: &OMatrix<T2, DimNameSum<Const<D>, U1>, DimNameSum<Const<D>, U1>>,
) -> Self {
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let v = m.fixed_slice::<D, D>(0, 0).diagonal();
Self {
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vector: crate::convert_unchecked(v),
}
}
}
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impl<T: Scalar + Zero + One, const D: usize> From<Scale<T, D>>
for OMatrix<T, DimNameSum<Const<D>, U1>, DimNameSum<Const<D>, U1>>
where
Const<D>: DimNameAdd<U1>,
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DefaultAllocator: Allocator<T, DimNameSum<Const<D>, U1>, DimNameSum<Const<D>, U1>>
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+ Allocator<T, DimNameSum<Const<D>, U1>, U1>
+ Allocator<T, Const<D>>,
{
#[inline]
fn from(t: Scale<T, D>) -> Self {
t.to_homogeneous()
}
}
impl<T: Scalar, const D: usize> From<OVector<T, Const<D>>> for Scale<T, D> {
#[inline]
fn from(vector: OVector<T, Const<D>>) -> Self {
Scale { vector }
}
}
impl<T: Scalar, const D: usize> From<[T; D]> for Scale<T, D> {
#[inline]
fn from(coords: [T; D]) -> Self {
Scale {
vector: coords.into(),
}
}
}
impl<T: Scalar, const D: usize> From<Point<T, D>> for Scale<T, D> {
#[inline]
fn from(pt: Point<T, D>) -> Self {
Scale { vector: pt.coords }
}
}
impl<T: Scalar, const D: usize> From<Scale<T, D>> for [T; D] {
#[inline]
fn from(t: Scale<T, D>) -> Self {
t.vector.into()
}
}
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impl<T: Scalar + PrimitiveSimdValue, const D: usize> From<[Scale<T::Element, D>; 2]> for Scale<T, D>
where
T: From<[<T as simba::simd::SimdValue>::Element; 2]>,
T::Element: Scalar,
{
#[inline]
fn from(arr: [Scale<T::Element, D>; 2]) -> Self {
Self::from(OVector::from([
arr[0].vector.clone(),
arr[1].vector.clone(),
]))
}
}
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impl<T: Scalar + PrimitiveSimdValue, const D: usize> From<[Scale<T::Element, D>; 4]> for Scale<T, D>
where
T: From<[<T as simba::simd::SimdValue>::Element; 4]>,
T::Element: Scalar,
{
#[inline]
fn from(arr: [Scale<T::Element, D>; 4]) -> Self {
Self::from(OVector::from([
arr[0].vector.clone(),
arr[1].vector.clone(),
arr[2].vector.clone(),
arr[3].vector.clone(),
]))
}
}
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impl<T: Scalar + PrimitiveSimdValue, const D: usize> From<[Scale<T::Element, D>; 8]> for Scale<T, D>
where
T: From<[<T as simba::simd::SimdValue>::Element; 8]>,
T::Element: Scalar,
{
#[inline]
fn from(arr: [Scale<T::Element, D>; 8]) -> Self {
Self::from(OVector::from([
arr[0].vector.clone(),
arr[1].vector.clone(),
arr[2].vector.clone(),
arr[3].vector.clone(),
arr[4].vector.clone(),
arr[5].vector.clone(),
arr[6].vector.clone(),
arr[7].vector.clone(),
]))
}
}
impl<T: Scalar + PrimitiveSimdValue, const D: usize> From<[Scale<T::Element, D>; 16]>
for Scale<T, D>
where
T: From<[<T as simba::simd::SimdValue>::Element; 16]>,
T::Element: Scalar,
{
#[inline]
fn from(arr: [Scale<T::Element, D>; 16]) -> Self {
Self::from(OVector::from([
arr[0].vector.clone(),
arr[1].vector.clone(),
arr[2].vector.clone(),
arr[3].vector.clone(),
arr[4].vector.clone(),
arr[5].vector.clone(),
arr[6].vector.clone(),
arr[7].vector.clone(),
arr[8].vector.clone(),
arr[9].vector.clone(),
arr[10].vector.clone(),
arr[11].vector.clone(),
arr[12].vector.clone(),
arr[13].vector.clone(),
arr[14].vector.clone(),
arr[15].vector.clone(),
]))
}
}