easing easing iterators for rust

Rust iterators are fantastic—why not use them for easing? Use like so:

use easing;let begin:f64 = 0;let end:f64 = 1000;let steps:u64 = 10;// In a for loop!for x in easing::sin_in(begin, end, steps){println!("Woo, I'm at x={}!", x);}// Mapping!fnmove_to(x:f64){println!("Moving on up to {}", x);}
easing::cubic_out(begin, end, steps).map(move_to);// And other iterator stuff!let xs:Vec<f64> = easing::exp_inout(begin, end, steps).collect();// why would you do this

Available iterators are currently:

function	in	out	in and out
linear	linear	linear	linear
quadratic	quad_in	quad_out	quad_inout
cubic	cubic_in	cubic_out	cubic_inout
quartic	quartic_in	quartic_out	quartic_inout
sinusoidal	sin_in	sin_out	sin_inout
exponential	exp_in	exp_out	exp_inout

Easing functions taken from warrenm's AHEasing.

Find it on crates.io at https://crates.io/crates/easing.

Licesnsed under the LGPLv3.