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Implement `Point` swizzling

This commit is contained in:
Jack Wrenn 2018-11-21 15:22:42 -05:00 committed by Sébastien Crozet
parent 85bfae5390
commit 74ff6ae199
2 changed files with 71 additions and 0 deletions
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2
src/geometry/mod.rs
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@ -53,6 +53,8 @@ mod similarity_construction;
mod similarity_conversion;
mod similarity_ops;
mod swizzle;
mod transform;
mod transform_alga;
mod transform_alias;

69
src/geometry/swizzle.rs Normal file
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@ -0,0 +1,69 @@
use base::allocator::Allocator;
use base::{DefaultAllocator, DimName, Scalar};
use geometry::{Point, Point2, Point3};
use typenum::{self, Cmp, Greater};
macro_rules! impl_swizzle {
($(where $BaseDim: ident: $name: ident() -> $Result: ident[$($i: expr),*]);*) => {
$(
impl<N: Scalar, D: DimName> Point<N, D>
where DefaultAllocator: Allocator<N, D>
{
/// Builds a new vector from components of `self`.
#[inline]
pub fn $name(&self) -> $Result<N>
where D::Value: Cmp<typenum::$BaseDim, Output=Greater> {
$Result::new($(self[$i]),*)
}
}
)*
}
}
impl_swizzle!(
where U0: xx() -> Point2[0, 0];
where U1: xy() -> Point2[0, 1];
where U2: xz() -> Point2[0, 2];
where U1: yx() -> Point2[1, 0];
where U1: yy() -> Point2[1, 1];
where U1: yz() -> Point2[1, 2];
where U2: zx() -> Point2[2, 0];
where U2: zy() -> Point2[2, 1];
where U2: zz() -> Point2[2, 2];
where U0: xxx() -> Point3[0, 0, 0];
where U1: xxy() -> Point3[0, 0, 1];
where U2: xxz() -> Point3[0, 0, 2];
where U1: xyx() -> Point3[0, 1, 0];
where U1: xyy() -> Point3[0, 1, 1];
where U2: xyz() -> Point3[0, 1, 2];
where U2: xzx() -> Point3[0, 2, 0];
where U2: xzy() -> Point3[0, 2, 1];
where U2: xzz() -> Point3[0, 2, 2];
where U1: yxx() -> Point3[1, 0, 0];
where U1: yxy() -> Point3[1, 0, 1];
where U2: yxz() -> Point3[1, 0, 2];
where U1: yyx() -> Point3[1, 1, 0];
where U1: yyy() -> Point3[1, 1, 1];
where U2: yyz() -> Point3[1, 1, 2];
where U2: yzx() -> Point3[1, 2, 0];
where U2: yzy() -> Point3[1, 2, 1];
where U2: yzz() -> Point3[1, 2, 2];
where U2: zxx() -> Point3[2, 0, 0];
where U2: zxy() -> Point3[2, 0, 1];
where U2: zxz() -> Point3[2, 0, 2];
where U2: zyx() -> Point3[2, 1, 0];
where U2: zyy() -> Point3[2, 1, 1];
where U2: zyz() -> Point3[2, 1, 2];
where U2: zzx() -> Point3[2, 2, 0];
where U2: zzy() -> Point3[2, 2, 1];
where U2: zzz() -> Point3[2, 2, 2]
);