Linear interpolation and iteration, automatically implemented over most float-compatible types.
Just need to know what's halfway between three and five?
```rust use lerp::Lerp;
assert_eq!(3.0.lerp(5.0, 0.5), 4.0); ```
Want to iterate across some points in that range?
```rust // bring the trait into scope use lerp::LerpIter;
// iterate and produce four items evenly spaced between 3.0 and 5.0 // note that the default, open iterator does not include both endpoints // this makes chaining lerping iterators simpler let items: Vec<_> = 3.0f64.lerpiter(5.0, 4).collect(); assert_eq!(vec![3.0, 3.5, 4.0, 4.5], items);
// closed iterators return both ends
asserteq!(vec![3.0, 5.0], 3.0.lerpiter_closed(5.0, 2).collect::
Of course, the real benefit is that it's derivation is broad enough that it also covers types such as num::Complex<T>. If you have an array-processing library, and the arrays are T: Add<Output = T> + Mul<F: Float, Output = T>, it'll just work for them as well.
toml
[dependencies]
lerp = "0.1"
Auto-built from Travis: https://coriolinus.github.io/lerp-rs/