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macro_rules! vec {
($name:ident [ $($field:ident),* ] = $fixed:ty) => {
#[derive(Clone, Copy, Debug, Hash, PartialEq, PartialOrd, Eq, Ord)]
#[repr(C)]
#[allow(missing_docs)]
pub struct $name<T> {
$( pub $field : T, )*
}
impl<T> From<$fixed> for $name<T> {
fn from([$($field),*]: $fixed) -> Self {
$name {
$(
$field,
)*
}
}
}
impl<T> Into<$fixed> for $name<T> {
fn into(self) -> $fixed {
[$( self.$field.into() ),*]
}
}
impl<T> AsRef<$fixed> for $name<T> {
fn as_ref(&self) -> &$fixed { unsafe { ::std::mem::transmute(self) } }
}
impl<T: Clone> $name<T> {
#[allow(missing_docs)]
pub fn from_slice(slice: &[T]) -> Self {
let mut iter = slice.iter();
$name {
$(
$field: iter
.next()
.expect(&concat!("Missing ", stringify!($field), "-axis in slice."))
.clone()
),*
}
}
}
}
}
macro_rules! from {
($name:ident [ $($field:ident),* ] = $other:ident) => {
impl<T> From<$other<T>> for $name<T> {
fn from(v: $other<T>) -> Self {
$name {
$(
$field: v.$field,
)*
}
}
}
}
}
vec!( Vector2 [x, y] = [T; 2] );
from!( Vector2 [x,y] = Point2 );
vec!( Vector3 [x, y, z] = [T; 3] );
from!( Vector3 [x,y,z] = Point3 );
vec!( Vector4 [x, y, z, w] = [T; 4] );
vec!( Point2 [x, y] = [T; 2] );
from!( Point2 [x,y] = Vector2 );
vec!( Point3 [x, y, z] = [T; 3] );
from!( Point3 [x,y,z] = Vector3 );