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rough_eq.rs
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/
rough_eq.rs
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use {N, P2, V2};
// Thickness radius
pub const THICKNESS: N = 0.001;
const ROUGH_TOLERANCE: N = 0.000_000_1;
pub trait RoughEq: Sized {
fn rough_eq(&self, other: Self) -> bool {
self.rough_eq_by(other, ROUGH_TOLERANCE)
}
fn rough_eq_by(&self, other: Self, tolerance: N) -> bool;
}
impl RoughEq for N {
fn rough_eq_by(&self, other: N, tolerance: N) -> bool {
(self - other).abs() <= tolerance
}
}
impl RoughEq for P2 {
fn rough_eq_by(&self, other: P2, tolerance: N) -> bool {
(*self - other).norm() <= tolerance
}
}
impl RoughEq for V2 {
fn rough_eq_by(&self, other: V2, tolerance: N) -> bool {
(*self - other).norm() <= tolerance
}
}
#[macro_export]
macro_rules! assert_rough_eq_by {
($left:expr , $right:expr, $tol:expr,) => ({
assert_eq!($left, $right, $tol)
});
($left:expr , $right:expr, $tol:expr) => ({
match (&($left), &($right)) {
(left_val, right_val) => {
if !((*left_val).rough_eq_by(*right_val, $tol)) {
panic!("assertion failed: `(left ~= right by {})`\
\n\
\n{}\
\n",
$tol,
::pretty_assertions::Comparison::new(left_val, right_val))
}
}
}
});
}